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Abolitionism features some of the most vibrant movements and critical scholarship today. Despite growing international reach, struggles in the so-called ‘Global South' are seemingly less often thought to be sites of contemporary abolition. This contrasts abolition’s history which shows that it has always been a global project. This article examines possibilities for recovering global dimensions and connections of abolition by thinking about abolitionist resurgence alongside resistance against corporate seed in Tanzania. It argues that corporate seeds in Tanzania are an appropriate site for abolitionist theorizing and organizing. This is because it produces relations of unfreedom for farmers in ways that resonate with (but are not the same as) relations of unfreedom produced by enslavement, the plantation, and their afterlives in the form of racial capitalism. This article proposes that abolitionist critique and mobilization can be strengthened by considering how sites in the Global South can constitute globally-entangled geographies of abolition. [ABSTRACT FROM AUTHOR]

Monitoring regeneration in woody communities and understanding the drivers of its success is crucial for gaining insight into the long-term persistence of trees in African drylands, where they play key socio-ecological roles. While fire, grazing and water availability are key factors for regeneration in these ecosystems, seed arrival, germination and seedling recruitment are still poorly documented under natural conditions in the West African Sahel. Tree planting is commonly carried out in West Africa to promote regeneration. The cost is considerable, the success is variable and its influence on spontaneous regeneration is unknown. We conducted a field inventory to ascertain the regeneration ability of woody communities in a Sahelian savanna in three land management types (plantations, communal grazing, old enclosures) to determine (i) the proportion of the different regeneration mechanisms; (ii) the influence of adult trees; (iii) the influence of management type and topography and (iv) their temporal dynamics. We first showed that regeneration diversity was poor, with half of the adult species not recorded in the regeneration phase. Secondly, regeneration mostly came from true seedlings compared to resprouting. Thirdly, adult communities were found to greatly influence regeneration density and composition. Fourthly, topography proved to influence regeneration density, whereas we observed little effect of the land management type. Lastly, historical data highlighted a steep decline in regeneration density over recent decades. These results raise questions about the persistence of woody vegetation in Sahelian savannas and highlight the need to protect large trees in suitable microsites, such as topographic depressions, to promote regeneration. [ABSTRACT FROM AUTHOR]

Twenty Pinus taeda L. families from both the Coastal Plain and Piedmont provenances in the southeastern United States were planted on an upper Piedmont site that experienced a severe ice storm at age 3 years. Storm damage and defect rates through age 11 years were compared with the seed transfer distance and the seed parents' breeding values to develop prediction models for storm damage and rates of forking, stem break, and sawtimber potential. Warmer-source families had higher probability of limb or stem breaks and foliage injury from the storm. Taller trees were more likely to experience breaks and foliage injury, even after accounting for seed transfer distance. Trees with forks or fusiform rust (Cronartium quercuum f. sp. fusiforme) infection had a higher probability of breaks. Trees with limb breaks or foliage injury did not have reduced sawtimber potential, but broken stems reduced sawtimber potential. The storm did not cause immediate mortality, but trees with major limb breaks, stem breaks, or foliage injury were less likely to be alive at age 8 years. At age 11 years, families with the best combination of breeding values for forking, straightness, and rust resistance had a predicted 60% of stems having sawtimber potential, whereas families with the worst combination had 30%. Study Implications : Planting warmer-source Pinus taeda (loblolly pine) families farther north and inland may lead to greater growth but poses a risk of damage from cold temperatures and ice storms. Trees grown for solid-wood products must be relatively defect-free and require a longer rotation, whereas bioenergy and pulpwood can use smaller, defective trees. This analysis presents predictions of defect rates through age 11 years based on the seed source and breeding values using data from a planting in the upper Piedmont of North Carolina. Land managers can use these models to weigh the benefits and risks when choosing families for reforestation. [ABSTRACT FROM AUTHOR]

The glomalin-related soil protein (GRSP) is an important component of soil organic carbon (SOC), which plays an important role in maintaining soil structural stability, soil carbon (C), and nitrogen (N) fixation. However, little is known about the GRSP content in soil and its contribution to soil nutrients in plantations of different tree species. In this study, we determined the soil physicochemical characteristics and GRSP contents in different soil layers of four kinds of plantations, including Acacia mangium (AM), Pinus caribaea (PC), Eucalyptus urophylla (EU), and Magnoliaceae glanca (MG), to address how the plantation types affected the GRSP in different layers of soil in southern China. The results showed that with an increase in soil depth, the GRSP content decreased linearly, and the contribution rate of GRSP to SOC and total nitrogen (TN) in deep soil was 1.08–1.18 times that in surface soil. The tree species significantly affected the vertical distribution of GRSP in soil. Among the four plantations, the conifer species PC had the highest level of GRSP, while the N-fixing species AM had the lowest level. However, SOC, soil capillary porosity (CP), TN, soil water content (SWC), and total phosphorus (TP) were important factors regulating soil GRSP content. Additionally, the regulation effects of soil properties on GRSP were various in surface and deep soil among different plantations. In order to improve soil quality and C sequestration potential, conifer species can be planted appropriately, or conifer species and N-fixing species can be mixed to increase soil nutrient content and enhance soil structure and function in afforestation of southern China. [ABSTRACT FROM AUTHOR]

The concept of the Plantationocene has received increasing interest in recent years across a variety of academic fields. This article introduces a forum in which seven scholars debate the relevance of the concept for their own work. This introduction outlines the contributions of the concept for the field of geography. [ABSTRACT FROM AUTHOR]

Biological invasions are one of the most important threats to biodiversity. However, spread mechanisms have been described in detail only for some widespread taxa. Here, we aim to characterize the unique phenomenon of × Sorbaronia ′Mitschurinii′ (Rosaceae) spread into temperate Scots pine forests. We assessed the surroundings of an abandoned × Sorbaronia ′Mitschurinii′ plantation, established in 1986 near Ośno Lubuskie (W Poland). Around the plantation we established 66 study plots in 30 m intervals along eight transects, in a systematic design. Using generalized linear mixed-effects models we analysed how the distance from the propagule source (i.e. abandoned plantation), maximum age of × Sorbaronia shrubs assessed using dendrochronological techniques, and light availability determined the density and biomass of the studied plant. We found that its mean aboveground biomass in the plantation was 7.22 ± 0.66 Mg ha−1, and decreased with distance from the propagule source: 6.83 Mg ha−1 30 m from the abandoned plantation, 1.38 Mg ha−1 at a distance of 90 m, and 0.11 Mg ha−1 at a distance of 180 m, almost disappearing at further distances (but present at the maximum distance of 450 m). The density and aboveground biomass of × Sorbaronia ′Mitschurinii′ increased with increasing maximal age of the studied plant and its light availability. The × Sorbaronia ′Mitschurinii′ plantation acted as a strong propagule source, as it reached a density of 100 ind. 100 m−2 after five years, forming a dense shrub layer, capable of reproducing. We conclude that alien species planted at high density and left with no management control might transform into invasion hotspots under favourable circumstances. The study highlights the importance of scientific awareness of similar cases of overlooked invasion sources, as management to limit their spread is still possible. [ABSTRACT FROM AUTHOR]

Agroforestry is often seen as a sustainable land-use system for agricultural production providing ecosystem services. Intercropping with food crops leads to equal or higher productivity than monoculture and results in food production for industry and subsistence. Low rubber price and low labor productivity in smallholdings have led to a dramatic conversion of rubber plantations to more profitable crops. The literature analysis performed in this paper aimed at better understanding the ins and outs that could make rubber-based agroforestry more attractive for farmers. A comprehensive search of references was conducted in March 2023 using several international databases and search engines. A Zotero library was set up consisting of 415 scientific references. Each reference was carefully read and tagged in several categories: cropping system, country, main tree species, intercrop type, intercrop product, level of product use, discipline of the study, research topic, and intercrop species. Of the 232 journal articles, 141 studies were carried out on rubber agroforestry. Since 2011, the number of studies per year has increased. Studies on rubber-based agroforestry systems are performed in most rubber-producing countries, in particular in Indonesia, Thailand, China, and Brazil. These studies focus more or less equally on perennials (forest species and fruit trees), annual intercrops, and mixed plantations. Of the 47 annual crops associated with rubber in the literature, 20 studies dealt with rice, maize, banana, and cassava. Agronomy is the main discipline in the literature followed by socio-economy and then ecology. Only four papers are devoted to plant physiology and breeding. The Discussion Section has attempted to analyze the evolution of rubber agroforestry research, progress in the selection of food crop varieties adapted to agroforestry systems, and to draw some recommendations for rubber-based agroforestry systems associated with food crops. [ABSTRACT FROM AUTHOR]

Abstract Background Mixed forests are better than monoculture forests in biodiversity, stand structure and productivity stability. However, a more comprehensive assessment of the ecosystem functions of monoculture and mixed plantations is lacking. We compared the single functions and ecosystem multifunctionality (EMF) in Fraxinus mandshurica and Larix olgensis mixed plantations with monoculture plantations in Northeast China and discussed the influences of biodiversity and environmental factors on EMF. Results The mixed plantations had higher biodiversity and ecological functions. Biodiversity was significantly higher in mixed plantations (such as CWMMH, Shrub.Shannon, Shrub.Richness, Herb.Shannon, Herb.Richness), but environmental factors differed less among the three forest types, and belowground diversity differed significantly only in the Bacterial.Shannon and Fungal.Shannon. Mixed plantations showed significant differences in single ecological functions relative to monoculture plantations, with more pronounced differences between mixed plantations and Larix olgensis monoculture plantations. Weighted ecosystem multifunctionality was significantly higher in mixed plantations than in monoculture plantations. EMF was mainly driven by tree diversity, environmental factors, shrub and herb species diversity, and soil microbial alpha diversity, which explained 25.35%, 8.94%, 8.83%, and 7.65% of the variation, respectively. Conclusions The establishment of mixed plantations can increase the biodiversity of forest stands and improve the ecosystem functions. These results highlight the advantages of multi-species plantations and the necessity of planting them. They are important for the conservation of biodiversity and the sustainable management of plantations.

Background: Mixed forests are better than monoculture forests in biodiversity, stand structure and productivity stability. However, a more comprehensive assessment of the ecosystem functions of monoculture and mixed plantations is lacking. We compared the single functions and ecosystem multifunctionality (EMF) in Fraxinus mandshurica and Larix olgensis mixed plantations with monoculture plantations in Northeast China and discussed the influences of biodiversity and environmental factors on EMF. Results: The mixed plantations had higher biodiversity and ecological functions. Biodiversity was significantly higher in mixed plantations (such as CWMMH, Shrub.Shannon, Shrub.Richness, Herb.Shannon, Herb.Richness), but environmental factors differed less among the three forest types, and below ground diversity differed significantly only in the Bacterial.Shannon and Fungal.Shannon. Mixed plantations showed significant differences in single ecological functions relative to monoculture plantations, with more pronounced differences between mixed plantations and Larix olgensis monoculture plantations. Weighted ecosystem multifunctionality was significantly higher in mixed plantations than in monoculture plantations. EMF was mainly driven by tree diversity, environmental factors, shrub and herb species diversity, and soil microbial alpha diversity, which explained 25.35%, 8.94%, 8.83%, and 7.65% of the variation, respectively. Conclusions: The establishment of mixed plantations can increase the biodiversity of forest stands and improve the ecosystem functions. These results highlight the advantages of multi-species plantations and the necessity of planting them. They are important for the conservation of biodiversity and the sustainable management of plantations. [ABSTRACT FROM AUTHOR]

Monitoring drought stress is crucial for estimating productivity and assessing the health status of forest ecosystems under global climate change. Solar-induced chlorophyll fluorescence (SIF) is mechanistically coupled to photosynthesis and has advantages over greenness-based vegetation indices in detecting drought. In recent years, SIF has commonly been used in monitoring drought stress in crop ecosystems. However, the response of tower-based SIF to drought stress in forest ecosystems remains unclear. In this study, we investigated the potential of tower-based SIF to monitor drought, which was quantified using the plant water stress index (PWSI) in a Chinese cork oak plantation. The results show the negative effect of drought on SIF, and afternoon depression of SIF emission under drought stress was observed. Canopy SIF (F) exhibited a nonlinear relationship with PWSI, while the quantum yield of SIF (ΦF) exhibited a significant linear relationship with PWSI at 687 nm and 760 nm (ΦF687: R2 = 0.90; ΦF760: R2 = 0.85). Incident radiation (PAR) and canopy structure affected the response of SIF to drought stress, with PAR as the main factor causing the nonlinear relationship between F and PWSI. Afternoon depression was described as the afternoon/morning ratio (AMR). AMRF and AMRΦF exhibited a negative linear response to PWSI. AMRF was less affected than F by PAR and canopy structures, and AMRΦF was more physiologically representative than ΦF. Moreover, AMRΦF was sensitive to VPD and REW, and it might be a good indicator of drought. Red SIF was more sensitive to drought than far-red SIF, as the R2 of PWSI with AMRΦF687 (R2 = 0.89) was higher than that with AMRΦF687 (R2 = 0.84). These results highlight the potential of tower-based SIF, especially red SIF, for drought monitoring in a plantation, and consideration of the physiological diurnal variation in SIF under drought stress is crucial for improving the accuracy of drought stress monitoring. [ABSTRACT FROM AUTHOR]

Background: The hydrological effects of invasive plant control in forestland have not been well studied in the past, and numerous scientific mysteries remain unsolved. The long-term suspension of the unsolved issues will unavoidably influence the sound growth and sustainable management of forest ecosystems. This study investigates the hydrological effects of controlling invasive weeds in forestland. The research aims to understand the impact of invasive weed control on soil and water loss. Methods: Conducted in Eucalyptus benthamii Maiden & Cambage plantations in Central Yunnan, SW China, which are invaded by alien weed Ageratina adenophora (Spreng.) R. M. King & H. Rob., four surface cover treatments were applied to study runoff and sediment yielding properties. The four surface cover treatments were weed harvesting and litter elimination (WH&LE), weed harvesting and litter retention (WH&LR), litter burning and weed renewal (LB&WR), and weed retention and litter retention (WR&LR). Essentially, WH&LE and LB&WR served as integrated management approaches for invasive weeds and litter, WH&LR was an independent weed control measure, and WR&LR served as a research control. Results: Runoff was significantly higher in the LB&WR plots (3.03 mm) compared to the WR&LR plots (1.48 mm) (p < 0.05). The WH&LE plots had higher runoff (2.39 mm) than the WR&LR plots (not statistically significant), while the WH&LR plots had less runoff (1.08 mm) than the WR&LR plots (not significant). Sediment yield was lower in the WH&LR plots (0.50 t/km2) than in the WR&LR plots (0.52 t/km2) (not significant), but significantly higher in the WH&LE plots (2.10 t/km2) and LB&WR plots (1.57 t/km2) than in the WR&LR plots (p < 0.05). Conclusions: Managing invasive weeds independently reduces the risk of soil and water loss, but combined management with litter can exacerbate the issue. Invasive weed control and litter management should be performed separately in slope plantations. This study provides a scientific basis for soil and water conservation, restoration and rehabilitation of plantation ecosystems. [ABSTRACT FROM AUTHOR]

Within the context of agricultural planning, spatial data have played a crucial role, replacing conventional tabular-based data. Plantation, one of the key agricultural commodities, has been of interest since they occupy large coverage of landmass. Primary data supplies have been provided by space agencies, allowing detailed, updated satellite data to monitor this resource, with the aid of machine learning. This article discusses the opportunity of implementing support vector machines (SVM) and relevance vector machines (RVM) for estimating tree girth as a predictor of tree maturity and plantation productivity. The current research indicated that baseline SVR models were unable to yield a sufficient outcome. The complexity of the problem suggested that only the radial basis function (RBF) kernel was promising. Tuning SVM on linear and polynomial kernels did not enhance the quality of the models, although it appeared that the phenomenon of diminishing return existed. After parameter tuning, this research yielded a model with root mean squared error (RMSE) around 8.5 cm with R2 around 0.69. Although it was recently introduced, RVM with the same RBF kernel did not yield a sufficient model with RMSE about 52 cm. This concludes that the optimal model should be sought through examining a wide range of machine learning approaches. [ABSTRACT FROM AUTHOR]

Based on 14 months of ethnographic research, this paper analyzes soil management within the plantation model of farmingin order to understand the extent to which life on large-scale monocultural farms can be controlled and directed toward extractiveproduction. Transnational soy farmers in Western Bahia Brazil 'correct' soils in the region to make them productive and marshal thisagronomic work to claim that they have added value to the land by 'building it up'. Still, the permeability of the plantation keepstransnational farmers from achieving their dreams of control. [ABSTRACT FROM AUTHOR]

The spatial distribution of soil moisture is a critical determinant for the success of vegetation restoration initiatives in semi-arid and arid regions. The Qilian Mountains, situated within a semi-arid zone in China, have been subject to significant water-induced soil erosion, which has led to extensive restoration activities, predominantly utilizing the species P. crassifolia. However, the interconnections between soil moisture and various land cover types within this region remain unclear, presenting challenges to effective woodland rehabilitation. This study examines the surface soil moisture dynamics in afforested areas with varying ages of plantation to determine the influence of tree planting on the moisture content of the upper soil layer. It investigates the characteristics and temporal patterns of surface soil moisture as the age of the plantation increases. The findings indicate that: (1) soil moisture levels follow a descending sequence from natural forest, through shrubland and grassland, to planted forest and mixed forest, with statistically significant differences observed between natural and mixed forests (p < 0.05); (2) young afforested areas (less than 50 years old) have lower soil moisture levels compared to natural forests, shrublands, or grasslands, and the ecohydrological impacts of afforestation become apparent with a temporal delay; and (3) the analysis using Generalized Additive Mixed Models (GAMM) and the application of Kriging interpolation to determine the spatial distribution of soil moisture reveals that in semi-arid and arid regions, several factors have a pronounced a non-linear relationship with the moisture content of the surface soil. These factors include the duration of afforestation, the position on the lower slope, the presence of shade on the slope, and the scale at which the study is conducted. Therefore, a comprehensive understanding of the dynamics of soil water content is essential to prevent the potential failure of artificially established forests due to inadequate soil moisture in their later stages. [ABSTRACT FROM AUTHOR]

Large carnivores have recently increased in number and recolonized in human‐dominated landscapes; however, their ecological roles in these landscapes have not been well studied. In the Shiretoko World Heritage (SWH) site, brown bears have recolonized a previously abandoned mosaic landscape of natural forests and conifer plantations after land abandonment. We previously reported that the bears had recently begun to dig for cicada nymphs in association with the creation of larch plantations. As a result, this digging activity decreased soil nutrients. To deepen the understanding of the novel ecological role of brown bears within human‐modified landscapes, we examined the impacts of brown bear digging on the growth of larch trees. We found that brown bear digging decreased fine root biomass of larch, soil water, and nitrogen availability. Brown bear digging negatively affected needle nitrogen content, but not carbon isotope ratios, a water stress index of trees. Tree ring data suggest that digging negatively affected the radial growth of larches. The results imply that digging decreases tree growth due to limited soil nitrogen uptake. Our findings indicate that the ecological roles of large carnivores may differ between natural and anthropogenic landscapes. [ABSTRACT FROM AUTHOR]

American films have long preoccupied themselves with the plantation as a site for staging scenes of subjection and problematic dramas of emancipation. They are usually less invested in historical accuracy than in constructing barely veiled commentaries on contemporary racial politics. As such, uncomfortable questions of spectatorship, complicity, and liberation are often either deflected or sublimated. This work compares two recent iterations in this genealogy, Antebellum (2020) and The Underground Railroad (2021), within the context of the digital streaming platforms through which their consumption is most commonly mediated. While the former treats the plantation as a violent space of exception that erupts inexplicably upon the present and relies heavily on reproducing lurid spectacles in order to service conventional and often perversely comforting genre expectations, the latter maps out pervasive permutations of the plantation while developing a speculative Black aesthetic which contributes to radical traditions of freedom dreaming. Both remain captive to the opportunistic logics of platform capitalism: the most recent iteration of the plantation's permutations. [ABSTRACT FROM AUTHOR]

Fast-growing Populus spp. are well-acknowledged to restore contaminated soils from heavy metals in industrial areas. Thus far, there is no knowledge about the phytoremediation capacity of Populus spp. plantations in hemiboreal Estonia conditions to restore industrially polluted areas. The objective of this study was to assess the soil contamination rate of heavy metals (As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb and Zn) and their uptake by mature hybrid aspen (Populus tremula × Populus tremuloides Michx.) in plantations in different industrial pollution areas (e.g. cement factory, oil shale mining). For the reference, industrially polluted plantations were compared with the low pollution area hybrid aspen plantation on former agricultural soil, which was influenced by fertilization and liming before afforestation. Twenty-one years after afforestation, soil samples were collected from the 0–10 cm topsoil layer. Aboveground biomass sampling was performed for bark and stem wood by ingrowth cores to separate wood formed during early (1–10 years) and late (11–21 years) stand development. Two decades after the afforestation of industrially polluted areas, the heavy metal concentrations in the soil were higher than the reference plantation and the standard reference for unpolluted soils in most cases. The highest concentrations of heavy metals in woody biomass were in the oil shale quarry spoil; because of poor growth, the accumulated pools in aboveground biomass were low. Cd differed from other metals and accumulated less in wood and more in bark. The concentration of heavy metals (Cd, Cr, Cu, Fe, Mn, Ni and Zn) was higher in the first decade of stand formation (1–10 years) than in the last 10 years (11–21 years). High pools of heavy metals were accumulated in aboveground biomass in the reference plantation, indicating the considerable removal of heavy metal residues from the previous fertilization and liming source with harvest. Two decades of afforestation with hybrid aspen is too short for complete ecosystem restoration from heavy metals in industrially polluted areas. [ABSTRACT FROM AUTHOR]

The present study models potential regions for Argan tree plantations in Algeria using the MaxEnt approach, taking into account the sites of successful plantations at national level. There has been exhaustive sampling of 45 sites of plantations, with results collected over three years, 2021, 2022 and 2023. Current climate data were used from the Worldclim database (version 2.0). The results obtained indicate that the north-western regions of the country, the eastern and central coasts, are highly suitable (≥75%), but the desert and steppe regions are weakly suitable (<25%). Therefore, a suitable bioclimatic environment for planting argan trees (with at least 50% probability) depends on a minimum temperature of 2.5 to 6.5°C and annual precipitation of 160 to 1,400 mm. [ABSTRACT FROM AUTHOR]

Plantation forestry is pivotal in meeting global timber and fiber demands while promoting sustainable practices. Eucalyptus plantations, renowned for their rapid growth and adaptability, have significantly expanded in tropical regions such as Thailand. Improved Eucalyptus clones have enhanced productivity, emphasizing the role of genetic improvement programs. Accurate biomass estimation in these plantations is crucial for sustainable management and bioenergy production. This study employs a nonlinear mixed model approach to evaluate tree variables combined with rotation, clones, and region on aboveground biomass (AGB) estimation. The results showed that the ''rotation, clones, region'' model emerged as the most precise, achieving the highest R² and the lowest SEE, ASE, and MPSE values. However, over-parameterization is a concern. The more straightforward ''clone'' model performed well, achieving a high R² and relatively low prediction error, with no systematic bias and comparable ASE, MPE, and MPSE values, making it a strong choice when fewer predictor variables are preferred. Our results revealed that clones H4 and K7 for the northeastern region and K58 for the eastern region show the highest annual productivity, with growth rates up to 20 t ha−1 year−1. The rapid AGB increment in clones K58, K62, and K7 during the first rotation suggests improved performance in subsequent rotations. As in eastern Thailand, selecting less arid sites can enhance these clones' AGB productivity. Additionally, intensive silvicultural practices could further boost their productive efficiency.

Different shade tree species are used in various coffee production systems across the world. Outside the benefits of biodiversity protection, temperature protection, and carbon sequestration shade trees can influence soil nutrient states through litter inputs and nitrogen fixation. However, little information is available in coffee plantations whether shade tree species and type of coffee variety planted under shade tree have an influence on soil physical properties and nutrient status in coffee-based farming systems of southwestern Ethiopia. Hence, the study was carried out to investigate the effect of shade tree species and coffee varieties in coffee plantation on the physicochemical properties of the soil. The study was conducted in Chora Botor district (Chalalaki coffee plantation), located in Jimma Zone, Oromia regional states of Ethiopia. The study was superimposed on coffee farm that has been established using four released coffee varieties (7440,744, F59 and 75227) under three recommended coffee shade trees (Albizia gummifera, Millettia feruginea and Acacia abyssinica). Soil physical properties and nutrient status were investigated in response to shade tree species, coffee varieties and their combination. The results indicated that the physical and chemical properties of the soil vary across the shade trees and coffee variety grown. The effect of shade tree species on soil depends on the type of coffee varieties grown under the shade tree species, Albizia gummifera and Acacia abyssinica trees enhanced more soil nutrient content and water-holding capacity of the soil than Millttia ferrugnia. Total nitrogen, organic matter, available phosphorous, exchangeable potassium, Cations Exchange Capacity, and bulk density were higher underneath Albizia gummifera than other coffee shade tree species. On the other hand, moisture content, available P, exchangeable K and CEC were higher beneath Acacia abyssinica than other coffee shade tree species. Soil pH was negatively correlated with Millettia ferruginia. Use of Acacia abysinica and Albizia gummifera shade tree species with compatible coffee varieties could be a viable option to augment soil fertility management practices in the coffee production systems of the southwest Ethiopia.

This study examined the nutritional, physicochemical, and bioactive compounds in mangosteen grown in southern Thailand from 2022 to 2024, encompassing hilly areas (Nakhon Si Thammarat range, Tenasserim range) and flat lands during both the fruit season and off-season. The influence of coastal regions (Gulf of Thailand and Andaman coast) on mangosteen nutrition was explored. The impact of high-level plantation and harvesting (during the fruit season) on mangosteen size and levels of bioactive compounds with high antioxidant capacity in mangosteen flesh was found to be greater than that of flat plantations (during the off-season). Mangosteens grown in flatlands during the fruit season exhibited brighter flesh color and faster ripening compared to those grown in hilly areas. Mangosteens from these results contained carbohydrates ranging from 10.3% to 16.9%. Mangosteens cultivated along the Andaman coast exhibited elevated levels of minerals (K 349 mg/100 g, Na 7.76 mg/100 g, and Mn 1.63 mg/100 g) and vitamins, especially B2 (0.10 mg/kg), B6 (0.20 mg/kg), B12 (0.03 mg/kg), and vitamin C (9.25 mg/kg). Conversely, the highest total phenolic content, flavonoids, and antioxidant activity were observed in hilly areas during the fruit season along the Gulf of Thailand (55 mg GAE/100 g, 32 mg QE/100 g, and ABTS values of 88%, respectively). However, mangosteens from hilly areas ripened faster than those from flatlands due to higher total soluble solids and lower fruit firmness. These findings provide valuable insights into the effects of the environment and location, enhancing understanding for year-round mangosteen plantation preparation.

Abstract We studied tree seedling survival rates and plantation success of the Growth and Transformation Plan I—GTP I (2011–2015) in the drylands of Northern Ethiopia. The study was carried out in six randomly selected districts of Tigrai region that represent three agro-ecological zones: the highland, midland and lowland. A biophysical survey was conducted to assess the survival rates of tree seedlings and the success rate of the plantation interventions. The study employed both primary and secondary data sources. Results revealed that there were variations (P

Simple Summary: We conducted this study in the boreal forest of Québec, Canada, to compare insect damage on white spruce (Picea glauca) trees within open-canopy, multispecies plantations, and trees naturally regenerated under mature mixed-wood canopies. Our plantation sites were established post-clearcutting and compared with naturally regenerated post-fire sites dominated by trembling aspen. Over two years, observations were made on young trees from ten sites in each environment, focusing on overall rates of herbivory, galls, spruce budworm damage, and sawfly defoliation. Despite a minor increase in spruce budworm damage in under-canopy forests from 2020 to 2021, overall, damage levels remained low, suggesting minimal impact on tree growth or mortality at this early outbreak stage. Contrary to initial assumptions, we found that insect damage was comparably low in both plantation and naturally regenerated environments, casting doubt on the idea that the enhanced sunlight and accelerated growth observed in plantations necessarily increase their susceptibility to pest attacks. In the context of global forest restoration efforts and Canada's pledge to plant 2 billion trees by 2050, the resilience of white spruce plantations to insect damage is of paramount importance. Amidst concerns over increasing pest damage due to climate change, the observed resilience of multispecies plantations underpins the effectiveness of ecosystem-based management in maintaining low insect damage levels without compromising growth. This balance highlights the potential of mixed-species plantations to mimic natural forest conditions, contributing to biodiversity conservation and sustainable forestry practices. This research illuminates the intricate dynamics between tree growth, environmental conditions, and pest vulnerability, offering valuable insights for future forest management and conservation strategies. In managed boreal forests, both plantations and natural regeneration are used to re-establish a cohort of conifer trees following harvest or disturbance. Young trees in open plantations generally grow more rapidly than under forest canopies, but more rapid growth could be compromised by greater insect damage. We compared insect damage on white spruce (Picea glauca (Moench) Voss, Pinaceae) growing in plantations with naturally regenerated trees under mature forest canopies in boreal forests (Québec, Canada). We selected ten sites in the naturally regenerated forest and in small, multispecies plantations and sampled ten young trees of 2.5–3 m (per site) in late summer 2020 and again in early and late summer 2021. We compared overall rates of herbivory, galls (adelgids), damage by the spruce budworm (Choristoneura fumiferana, Clemens), and defoliation from sawflies. Overall, insect herbivory damage remained at similarly low levels in both habitats; an average of 9.3% of expanding shoots were damaged on forest trees and 7.7% in plantation trees. Spruce budworm damage increased from 2020 to 2021 and remained higher in under-canopy trees, but damage rates were negligible at this early stage of the outbreak (1.5% in forest vs. 0.78% of buds damaged on plantation trees). While damage due to galls was higher in plantations, the overall low level of damage likely does not pose a significant impact on the growth or mortality of young trees. [ABSTRACT FROM AUTHOR]

Landscape modification is a major threat to carnivores worldwide, but modified landscapes can also provide important habitat for these species, as protected areas alone are insufficient. Understanding how carnivores use modified landscapes, such as production forests, can inform management strategies to improve the value of these landscapes to carnivores. Little is known about habitat selection by marsupial carnivores in production forests, where they occupy a similar ecological niche to their more well‐studied eutherian counterparts. We used GPS tracking, Hidden Markov Models, and Manly's selection ratios to identify the habitat selected in three behavioral states by the largest marsupial carnivore, the Tasmanian devil (Sarcophilus harrisii), in a timber plantation‐dominated landscape. Behavioral states were approximated as: state 1, resting or feeding at a carcass; state 2, foraging; and state 3, travel. Devils did not show preferences for any of native forest, native grassland, and plantation in any behavioral state. Within plantations, devils preferred a plantation age of 4–7 years (selection ratio [wi] = 1.52). Devils preferred roads (state 1: wi = 2.71, state 2: wi = 2.48, state 3: wi = 2.97) and plantation edges (state 1: wi = 2.38, state 2: wi = 2.24, state 3: wi = 2.78) in all behavioral states, and moved faster on roads and edges than away from them. Together, our results indicate devils use road and edges for foraging (scavenging and hunting) and travel. No measured habitat variables influenced devil home range size. To support devils in plantation landscapes, we recommend maintaining a heterogeneous landscape of different plantation ages and native remnants and reducing the risk of vehicle collisions by minimizing forestry traffic at night. Tasmanian devils share similar adaptable traits to generalist eutherian carnivore species in their use of modified landscapes. Plantations can provide valuable habitat for this and other threatened predator species. [ABSTRACT FROM AUTHOR]

The forest canopy affects the water entering the forest ecosystem by intercepting rainfall. This is especially pertinent in forests that depend on rainfall for their ecological water needs, quantifying and simulating interception losses provide critical insights into their ecological hydrological processes. In the semi‐arid areas of the Loess Plateau, afforestation has become an effective ecological restoration measure. However, the rainfall interception process of these plantations is still unclear. To quantify and model the canopy interception of these plantations, we conducted a two‐year rainfall redistribution measurement experiment in three typical plantations, including a deciduous broadleaf plantation (Robinia pseudoacacia) and two evergreen coniferous plantations (Platycladus orientalis and Pinus tabuliformis). Based on this, the revised Gash model was used to simulate their interception losses, and the model applicability across varying rainfall types was further compared and verified. The experiment clarified the rainfall redistribution in the three plantations, and the proportions of throughfall to gross rainfall in Robinia pseudoacacia, Platycladus orientalis, and Pinus tabuliformis were 84.8%, 70.4%, and 75.6%; corresponding, the stemflow proportions were 2.0%, 2.2%, and 1.8%; the interception losses were 13.2%, 27.4%, and 22.6%, respectively. The dominant rainfall pattern during the experiment was characterized by low‐amounts, moderate‐intensity, and short‐duration, during which the highest interception proportions across the three plantations were observed. We used the Penman‐Monteith equation and the regression method, respectively, to estimate the canopy average evaporation rate of the revised Gash model, finding that the latter provides a closer match to the measured cumulative interception (NSE >0.7). When simulating interception under the three rainfall patterns, the model with the regression method better simulated the cumulative interception and event‐scale interception for Platycladus orientalis and Pinus tabuliformis plantations under the dominant rainfall pattern. The results contribute valuable information to assess the impact of forest rainfall interception on regional hydrologic processes. [ABSTRACT FROM AUTHOR]

This article presents a broad and comparative examination of property formation in the French and English plantation colonies of the Caribbean and the southern North American mainland. It considers the connections between claims to exclusive control over human beings and claims to portions of the earth's surface. In the two early modern empires, planters pushed consistently and successfully to remove social, legal, and ecological constraints that limited their full control over their human and terrestrial property. Moreover, they insisted on legally fusing fields and workers, assimilating slaves to the category of real estate for purposes of inheritance and legal liability for debt. By the mid-eighteenth century, the French and British colonies had developed precociously modern capitalist property forms. In the Age of Revolutions, ideologues from plantation colonies, such as Thomas Jefferson and Michel-René Hilliard d'Auberteuil, emerged as radical advocates of absolute private property rights. [ABSTRACT FROM AUTHOR]

The electrophysiological and behavioural responses of Anomala dimidiata (Coleoptera: Rutelinae) were studied for its host kiwi plant's (Actinidia deliciosa) three volatiles, (Z)-3-Hexen-1-ol, Linalool, and (-)-α-Pinene. This experiment comprises electroantennographic assay using EAG and field testing in the Kiwi Horticulture field using synthetic compounds. In EAG assays, all three test compounds elicit significant responses with 55.66± 3.41% for (Z)-3-Hexen-1-ol, 44.97± 1.08% for Linalool, and 53.75± 0.33% for (-)-α-Pinene in male beetles and 54.82± 3.52% for (Z)-3-Hexen-1-ol, 44.97± 0.30% for Linalool and 53.75± 4.69% for (-)-α-Pinene in females beetles as compare to reference compound. In the field testing, (Z)-3-Hexen-1-ol baited traps caught maximum beetles while (-)-α-Pinene-baited traps had significantly less number of beetles attracted to them. Linalool-baited traps caught 60.1% fewer beetles than (Z)-3- Hexen-1-ol baited traps but 62.7% more beetles than (-)-α-Pinene-baited traps. This study concludes that (Z)-3-Hexen-1-ol is a potential kairomone for A. dimidiata. [ABSTRACT FROM AUTHOR]

Five hundred years of desire for cotton has reshaped landscapes, built global economic commodity chains, and devalued human life in the name of producing cheap clothing. Since 2001, cotton monocultures in South India have also reorganized genetic codes, continuing centuries of work to maintain the socioecological possibility of extractive agricultural production. This paper combines ethnographic and ethnobiological research in Telangana, India, to center cotton's role in organizing socioecological life for an agrarian world including farmers, farmworkers, plants, soils, buyers, weeds, and animals. Mutually exclusive systems of genetically modified Bt and organic cotton production offer a range of possible organizations of labor, aspiration, reciprocity, and labor. While historically situated in plantation inequalities, cotton production can also make unexpected room for socioecological relationships outside extractive monoculture. [ABSTRACT FROM AUTHOR]

Ethnobiology has long recognized that human and plant relationships produce particular ways of living. The discipline is increasingly asking how these lifeworlds reflect and create sociopolitical formations—from low-impact hunting–gathering or slash-and-burn agriculture, to colonial plantations and runaway settlements, to contemporary agribusiness and alternative biodynamic agriculture. In this special issue, we propose the concept plant-anthropo-genesis to highlight the ways in which plants and people are co-produced. We explore entanglements between plants and people over time, drawing on wide-ranging ethnographic and historical research to offer new and critical insights into the ways that plant–human lifeworlds co-produce one another—from the processes of racialization in plantation societies to the aspirational interventions of gardeners, farmers, and scientists aiming for redemption from chemical industrial agriculture. The collection centers on acts of reciprocal human and botanical labor through a variety of contexts and perspectives in crop fields, including: how monocrops and plantations reshape socioecological life; ritual dimensions of plant–human interactions; and the regenerative alternatives that re-imagine plant–human relations and agro-ecological possibilities amid the historical weight of extractivist agriculture in plant-anthropo-worlds. [ABSTRACT FROM AUTHOR]

In this article, I use the concept of 'plant-people intimacies' for the social-mediated web of cognitions, rituals, affects and embodied memories that connect some human groups and some plant species. I test the concept in the transformed landscapes of plantation Hawai'i, where sugar canes, pineapples and other crops replaced the traditional taro gardens and displaced their human gardeners while producing a multi-ethnic population with migrant workers-settlers. I will analyse how evocations of special bonds to some crops among diasporic persons express a vegetal nexus with ancestral geographies and act as a code to negotiate social and historical positionalities. [ABSTRACT FROM AUTHOR]

We studied tree seedling survival rates and plantation success of the Growth and Transformation Plan I—GTP I (2011–2015) in the drylands of Northern Ethiopia. The study was carried out in six randomly selected districts of Tigrai region that represent three agro-ecological zones: the highland, midland and lowland. A biophysical survey was conducted to assess the survival rates of tree seedlings and the success rate of the plantation interventions. The study employed both primary and secondary data sources. Results revealed that there were variations (P < 0.05) in the survival of planted tree seedlings among plantation sites of the same village, between the villages of the same district and among the districts. The regional mean survival rate of planted tree seedlings was 53%. The planting interventions were not encouraging due to lack of pre- and post-planting management, moisture stress, poor soil and site conditions, planting an unmanageable number of seedlings, weak law enforcement and lack of proper monitoring and evaluation mechanisms. In the study areas, four types of ownership were identified: private, communal, state and youth groups. Among the ownership types, private ownership had the highest rate of success, whereas community ownership had the lowest rate. For sustaining successful plantation development, watering, pre- and post-planting management of planted tree seedlings and permanent employment of guards are important. Highlights: Poor survival of planted tree seedlings and plantation success is not satisfactory. There was discrepancy on what is reported and verified in the field. Plantation success varies with tree species, agroecology and ownership types. Better tree seedling survival rate was found in the private ownership type. Lowest tree seedling survival rate was found in the communal plantation types. [ABSTRACT FROM AUTHOR]

Uncertainties remain regarding the carbon (C) loss due to scarification in afforested lichen woodlands (LW), which originate from regeneration failures of closed-crown black spruce- feathermoss stands due to compounded disturbances. Therefore, the objective of this study was to characterize the C stock changes in the forest floor of scarified, unharvested LWs. Ten afforestation trials were established from 1999 to 2014 in LWs in the managed boreal forest of Québec. Ground surface layers were sampled in 2017 for different microsites. From 3 to 18 years after treatment, scarified floors exhibited ≈ 2 Mg ha−1 C loss, due to opposite trends in the furrow and ridge microsites. Both gradually approached the undisturbed C density level of forest floor between furrow pairs and between skidder trails microsites without reaching it after 18 years. This suggests that microsite C density continued to evolve afterward, and that losses due to scarification might be recovered, due to a higher potential gain in the furrow microsites combined with a lower expected loss in the ridge microsites. Carbon managers should use a permanent 2 Mg ha−1 C loss in the forest floor due to scarification in LWs, acknowledging that this is offset by the growth of planted trees. [ABSTRACT FROM AUTHOR]

To enhance forest carbon sequestration capacity, it is important to optimize forest structure by revealing the spatial effects of the aboveground biomass of individual trees, with particular emphasis on stand origin and tree size. Here, 0.3 ha clear-cut plots of Pinus kesiya var. langbianensis forest were selected in a typical plantation and natural stand. Then, the ordinary least squares model and spatial regression models were used to analyze the different responses between spatial position and individual tree biomass based on the stand origin and diameter at breast height (DBH) of the tree. Our study shows the following: (1) The spatial effect produced a stronger response in the natural stand than in the plantation. The amount of change in the adjusted R-squared (ΔRadj2) of tree component totaled 0.34 and 0.57 for Pinus kesiya var. langbianensis and other trees in the natural stand, compared to only 0.2 and 0.42 in the plantation; (2) Spatial effects had a stronger impact on the accuracy of the fit for the crown (ΔRadj2 = 0.52) compared to the wood and bark (ΔRadj2 = 0.03) in the plantation, and there were no significant differences in the natural stand (ΔRadj2 = 0.42, ΔRadj2 = 0.43); (3) When DBH reached a certain size, the impact of spatial effect for the crown showed a significant change from positive to negative. The sizes of DBH were 19.5 cm, 14 cm and 34.6 cm, 19 cm for branches of Pinus kesiya var. langbianensis and other tree species in the plantation and natural stand, and were 20.3 cm and 31.4 cm for the foliage of Pinus kesiya var. langbianensis. Differences in stand structure led to varied responses in the biomass of tree components to spatial effects. [ABSTRACT FROM AUTHOR]

Global warming, threats to humankind as driven by the emissions of different greenhouse gases (GHGs) including carbon dioxide (CO2), is becoming a great concern to deal with the vagaries of climate. Plantation ecotypes with greater carbon(C) sink capability are leading among the potential abatement strategies for sequestration of terrestrial C. The present investigation emphasizes on total C stock and litter C status under 13 years old Swietenia macrophylla (Mahogany) pure plantation in Terai belt of West Bengal, India. Stratified tree technique was adopted to estimate the above ground biomass through non-destructive method whereas quadrate method of sampling was followed for estimating leaf litter. The present investigation showed that the total above ground biomass (AGB) of the plantation was 179.73 Mg ha−1 including 95.02 Mg ha−1 (52.83%) shared by stem and in other hand the branch contributed 55.37 Mg ha−1 (30.81%) and the remaining 29.34 Mg ha−1 (16.32%) by leaves. The below ground (root) biomass (BGB) was assessed to be 53.91 Mg ha−1. The biosphere part recorded C was 109.81 Mg ha−1, comprising the total C of AGB and BGB of 84.47 Mg ha−1 and 25.34 Mg ha−1, respectively. Soil C stock (at 0–60 cm) of 40.36 Mg ha−1 comprised 25.30 Mg ha−1 at 0–20 cm followed by 10.46 Mg ha−1 at 20–40 cm and 4.60 Mg ha−1 at 40–60 cm depth, respectively. The total litter production was 6.92 Mg ha−1 yr−1 in 2016–17 and 8.39 Mg ha−1 yr−1 in 2017–18, respectively. The amount of total C storage of plantation was observed to be 150.17 Mg ha−1, comprising 109.81 Mg ha−1 in biosphere and 40.36 Mg ha−1 in soil. The litter C stock of 3.48 Mg ha−1, was excluded from the ecosystem carbon budgeting (ECB), because it acts as a transitional between lithosphere and biosphere. Conclusively, the mahogany-based plantation is not only remunerative to the farmers but also provisions significant improvement in soil fertility along with C sequestration which deploys a crucial part in the sustainable maintenance of the ecosystem in addition to providing a guideline for ECB of the plantation. [ABSTRACT FROM AUTHOR]

Functional trait ecology has the potential to provide generalizable and mechanistic predictions of ecosystem function from data of species distributions and traits. The traits that are selected should both respond to environmental factors and influence ecosystem functioning. Invertebrate mouthpart traits fulfill these criteria, but are seldom collected, lack standardized measurement protocols, and have infrequently been investigated in response to environmental factors. We surveyed isopod species that consume plant detritus, and tree communities in 58 plots across primary and secondary forests in Singapore. We measured body dimensions (body size traits), pereopod and antennae lengths (locomotory traits), dimensions of mandible structures (morphological mouthpart traits), and mechanical advantages generated by mandible shape (mechanical mouthpart traits) for six isopod species found in these plots and investigated if these traits respond to changes in tree community composition, tree diversity, and forest structure. Morphological mouthpart traits responded to a tree compositional gradient reflecting forest recovery degree. Mouthpart features associated with greater consumption of litter (broader but less serrated/rugose lacinia mobilis [an important cutting and chewing structure on the mandible]) were most prevalent in abandoned plantation and young secondary forests containing disturbance-associated tree species. Feeding strategies associated with fungi grazing (narrower and more serrated/rugose lacinia mobilis) were most prevalent in late secondary forests containing later successional tree species. Since morphological mouthpart traits likely also predict consumption and excretion rates of isopods, these traits advance our understanding of environment–trait–ecosystem functioning relationships across contrasting tropical forest plots that vary in composition, disturbance history, and post-disturbance recovery. [ABSTRACT FROM AUTHOR]

The importance of urban tree diversity for improving resilience is increasingly understood by decision makers. Urban foresters want to prevent the overrepresentation of species on their streets and in their city, which could result in a significant loss of canopy cover in the event of a large-scale disturbance such as a drought or an exotic pest or disease. Although numerous software and tools exist to visualize tree inventories and plan tree maintenance work, only a few offer support for increasing tree diversity. After reviewing the existing tools available for urban forest managers, we present SylvCiT, a novel decision-support and open-source software available on a web platform designed to consolidate information related to the urban forest in one place and facilitate decision-making at different scales. While the first interfaces provide the user with a spatially explicit portrait of the urban forest (species richness, functional diversity, structural diversity, i.e., diameter classes) and associated ecosystem benefits (e.g., stored carbon, ornamental value), the software is designed to produce a list of functional groups and appropriate species to plant considering tree species already present. Based on an artificial intelligence algorithm, SylvCiT identifies the types of trees (species and functional groups) that are absent or underrepresented at different scales to make recommendations that increase species and functional diversity to improve resilience to global change. SylvCiT will continue to be developed to evaluate other ecosystem benefits and integrate criteria such as site characteristics into the recommendation algorithm. [ABSTRACT FROM AUTHOR]

The use of quality seedlings is a crucial factor when establishing healthy forests through afforestation. The quality of seedlings is determined by various morphological characteristics, such as seedling height, diameter at the root collar, and other characteristics that influence growth performance and ease of application. The purpose of this study was to investigate the possible use of plankton communities that emerge from marine mucilage (MM) outbreaks as plant nutrients. This would contribute to the protection of marine ecosystems and to the development of alternative methods for agriculture and forestry practices. This study assessed the germination characteristics of seeds and the morphological attributes of 1-year-old seedlings of Black pine (Pinus nigra), Turkish red pine (Pinus brutia), and Scots pine (Pinus sylvestris). The effects of marine mucilage, land moss, and seaweed treatments on the seedling characteristics of the species were also compared. Marine mucilage treatment positively influenced seedling growth in all morphological characteristics of seedlings of the same species compared with the land moss- and seaweed-treated seedlings, whereas the seedlings from the control group had the lowest growth performance. Statistically significant differences were found among the species and the treatments for the investigated characteristics. This study revealed that the application of marine mucilage, land moss, and seaweed could be used as promoters for seedling growth in the nursery practices of this species. [ABSTRACT FROM AUTHOR]

Sugar plantations have fundamentally shaped water use in Maui, Hawai'i for over 100 years, with tremendous resulting impacts on ecosystems and Native Hawaiian communities. In this paper, we build on literature on the plantationocene and the political lives of infrastructure to examine plantation irrigation infrastructure. We center Maui's vast water conveyance ditch system as a means of understanding how infrastructure continues plantation logics into the present, considering both the physical ditches themselves as well as the laws and politics which support continued water extraction. We also consider infrastructural futures, highlighting ongoing efforts of communities seeking water justice via infrastructural control. [ABSTRACT FROM AUTHOR]

Only two places in the world are home to the 2,500 hectares of fragmented forests of the tertiary relict oriental (Anatolian) sweetgum tree species (Liquidambar orientalis Miller, 1768): southwestern Türkiye and Rhodes Island (Greece). It is on the brink of extinction due to ongoing anthropogenic pressures. The goal of this study, which used the analytical hierarchy process as the approach, was to identify alternate in situ conservation places where the oriental sweetgum tree may persist owing to suitable living circumstances. The study area was chosen to be on southwestern Türkiye in light of historical records and current data from field studies and forest stands to analyze the potential plantation areas. Soil and climate factors with 0.3597 (36%) weight ratios were the best criteria to determine potential plantation areas. The two most important parameters in identifying the potential plantation area for the Anatolian sweetgum tree were alluvial, alluvial coast, and hydromorphic soils with a weight of 70.3% and average winter temperature of 6–10 °C with a weight of 66.87%. The area under the curve value was determined to be 0.750. According to the results, the most suitable areas for plantations were generally observed as riverine habitats where the species spread naturally during its history. The results are useful for forestry managers in developing successful plantation practices will alleviate the fragmentation and contribute to the species avoiding the genetic bottleneck, considering almost half of the entire study area has potential to develop medium- (488,448 ha, 41.2%) and high (95,400 ha, 8.1%)-level oriental sweetgum tree plantations. [ABSTRACT FROM AUTHOR]

This study aimed to investigate the effect of conversion from natural forest to cinnamon plantation on the top 1 m soil carbon stocks and soil characteristics. The project was conducted on Andosols of Kerinci Regency, Sumatera, Indonesia, sampling the soil profile under natural forests and a chronosequence of cinnamon plantations of different ages (1, 5 and 10 years). SOC stocks were quantified alongside physical properties (bulk density) and chemical properties (carbon, nitrogen, C/N ratio) to investigate the impact of land conversion. SOC stocks increased 1 year after conversion to cinnamon plantations, but then tended to decrease as the plantations got older. The initial increase was observed alongside decreasing bulk density 1 year after forest conversion to cinnamon plantation, likely as a result of the fresh input of (less dense) pyrogenic soil organic matter as a result of slash and burn practices and transport down the soil profile owing to leaching. In older plantations SOC stocks were lower, probably because organic matter had been decomposed or leached out of the profile. The free particulate organic matter (fPOM) was isolated from selected topsoil and subsoil layers and analysed for carbon, nitrogen, and FTIR analysis. FTIR analysis revealed that topsoil fPOM contained more aromatic functional groups than subsoils and had a higher degree of decomposition. Aromatic and carbohydrate functional groups were initially lower in recently converted cinnamon plantation, but the trend was reversed 10 years after conversion. The initial flush of fresh organic matter into soils after slash and burn provides fPOM with a lower degree of decomposition but is short-lived and fPOM becomes more microbially processed as the cinnamon plantation ages. We conclude that, after a short term increase brought about by slash and burn, forest conversion to cinnamon plantation in Kerinci Regency depletes SOC stocks both in topsoils and subsoils. [ABSTRACT FROM AUTHOR]

This essay draws on the notions of scalability and friction elaborated by Anna Lowenhaupt Tsing in the context of South East Asian plantations to consider two series of works “Vegetation” (1999–2016) and “Naga Doodles” (2017) created by artist Simryn Gill (Singapore, 1959). By outlining the material properties, processes, and media Gill uses, it offers a critique of economic standardisation, and accompanying hierarchies that mobilise anthropocentric beliefs and assumptions about time and space. Importantly, it suggests that Gill’s works invite ecological readings and warnings that are cosmological and concern the fate of this planet. [ABSTRACT FROM AUTHOR]

The increasing scarcity of major commercial tropical hardwood species has necessitated the utilization of plantation grown exotic timber species as a potential means of maintaining Ghana's foundation of timber resources. To better consider Albizia lebbeck as a substitute for wood species which are being seriously over-exploited to the point of commercial extinction, its wood properties were characterized to expatiate its utilization potentials. Three mature plantation grown Albizia lebbeck trees with diameters 45-50 cm at breast height were purposively selected and sampled at four stem height levels of tree height. The samples were sawn into the required sizes in accordance with the British standard, BS 373 (1957) for testing. The heartwood and sapwood proportions were evaluated and the samples were examined for hardness, bending strength (MOE and MOR), compression strength parallel to grain, shear strength parallel to grain, and air-dry density. All trees had a significantly higher heartwood than sapwood percentage. The air-dry density values at 12% MC were 868 kg/m3, 806 kg/m3, 695 kg/m3 and 564 kg/m3 for four sections of the stem (heights 0-25%, 26-50%, 51-75% and 76-100%). In general, the plantation grown Albizia lebbeck exhibited favourable strength values, suggesting that it is endowed with adequate properties for being an alternative species to supply the wood industry.

The Great Green Wall (GGW) is an international initiative to combat land degradation and restore native plant life in the Sahel, but due to a lack of monitoring tools, it remains unknown to be considered as success or failure. Here, we quantify the impact of GGW plantations and Corporate plantations (privately owned) in Sahelian Senegal based on remote sensing data and deep learning by mapping individual trees and their biomass across the Sahel region. Tree features (cover, density and above-ground biomass) have been computed in every hectare of 42 plantations (of both, corporate and GGW) and their surrounding non-planted areas, subsequently used for a comparative analysis of tree features. Results showed that gains in tree features varied substantially between plantations. At plot scale, among Corporate plantations, the average gain in tree density was 61.16±42.12 trees/ha while it was 5.7 ± 5.8 trees/ha for GGW plantations. In regards to tree cover, the average gain was 618.5 ± 588.5 m2/ha for Corporate plantations and 71.72±108.89 m2/ha for GGW plantations. For the above-ground biomass, the average gain was 3.36±3.29 tons/ha in the Corporate plantations and 0.46±0.67 tons/ha in the GGW plantations. The average gain in foliar biomass in the Corporate plantations was 0.15±0.13 tons/ha and in the GGW plantations, it was 0.02±0.03 tons/ha. The average gain in wood biomass was 3.21±3.12 tons/ha among the Corporate plantations and was 0.43±0.64 tons/ha among the GGW plantations. Notably, regarding the relative benefit in terms of ecosystem services per unit of density, each tree in GGW plantations contribute more to ecosystem services per unit of density compared to Corporate plantations. In GGW, each gained tree contributes 18 m2 of cover, 116.1 kg of above-ground biomass, 5.6 kg of foliar biomass, and 114.2 kg of woody biomass, while in corporate plantations, on the other hand, each gained tree adds 9 m2 of cover, 48.4 kg of above-ground biomass, 2.3 kg of foliar biomass, and 46.3 kg of woody biomass. These findings are opposed to conventional paradigms, suggesting that the Great Green Wall, while perhaps missing its tree density targets, has succeeded in its mission to produce ecosystem services per tree. This raises important questions about the redefinition of objectives in reforestation projects, focusing on quality rather than quantity, a perspective that could transform our understanding of the successes and failures of these essential ecological restoration initiatives. However, the assessment primarily relies on indicators such as cover and biomass, potentially overlooking other crucial ecosystem services. Therefore, while our conclusions underscore the effectiveness of reforestation initiatives, future research should aim to establish a more comprehensive understanding of ecosystem services by incorporating additional indicators beyond cover and biomass, such as species diversity, soil health, water retention, and habitat quality.

With 1.5 million ha of bamboo forest, Vietnam ranks 4th among the world's largest bamboo producers. The bamboo sector has significant development potential in the context of national and international impacts to build a bio-economy and increase the use of biogenic renewable resources. The bamboo industry in Vietnam is considered to have great development potential, with a potential production value of USD 1 billion. However, a number of factors currently significantly limit this potential. For example, the bamboo resource is overexploited and mismanaged; the level of horizontal and vertical cooperation among actors in the Luong bamboo value chain is weak; the utilisation rate of material bamboo is low; high-value bamboo products have not been developed; and benefit sharing among chain actors is unequal. As chopsticks and votive paper are the most common semi-industrial products in Vietnam, this paper analyses the characteristics of chain actors and compares the financial and economic performance of different actors in the chopstick and votive paper value chain (VC) in Thanh Hoa Province. Data were collected through interviews with eight key informants, 12 bamboo producers, five traders, one votive paper company, one chopstick company and six focus group discussions. The results show that the utilisation rate of raw material in the chopstick VC is low at less than 20 %. The net profit per ton of finished product for the processing company is much higher than the net profit for the farmers and traders. The total value added is USD 182.5/ton in the chopstick VC and USD 244/ton in the votive paper VC. The value added by farmers and traders is very low (less than 10 % of the total value added). Possible options for promoting cooperation between chain actors and improving the performance of chain actors are discussed.

Carbon storage in plant biomass is the simplest and most economically viable way to reduce atmospheric carbon dioxide carbon dioxide concentration. The objective of this study was to estimate and model the biomass and carbon storage of the stump and root in Populus deltoides trees in afforestation, Guilan Province of Iran. For this purpose, 93 trees with 25 years old were selected from different diameter classes and after cutting and removing the sections, an excavator was used to unearth the stumps and roots of the trees from the soil. In order to estimate the biomass and carbon storage of tree stumps and roots, samples of these components were isolated and weighed, and after drying in the oven, the dry weight of the samples was measured. The carbon content of stumps and roots of the trees were calculated after burning the dried samples in an electric furnace. The results showed that the biomass of stumps and roots was 7.99 and 65.5 kg per tree, respectively, and the carbon content of stumps and roots was estimated to be 3.92 and 32.32 kg per tree, respectively. The results of allometric equations showed that the models for estimating biomass and carbon storage of stumps and roots using the tree stump diameter variable had a high coefficient of determination, but the model using the stump height had no acceptable coefficient of determination. The evaluation results of different models also showed that the power model was more accurate than other models. In general, the results showed that the carbon stored in stumps and roots was 1.568 and 12.928 tons per hectare, respectively.

This essay draws on the notions of scalability and friction elaborated by Anna Lowenhaupt Tsing in the context of South East Asian plantations to consider two series of works “Vegetation” (1999–2016) and “Naga Doodles” (2017) created by artist Simryn Gill (Singapore, 1959). By outlining the material properties, processes, and media Gill uses, it offers a critique of economic standardisation, and accompanying hierarchies that mobilise anthropocentric beliefs and assumptions about time and space. Importantly, it suggests that Gill’s works invite ecological readings and warnings that are cosmological and concern the fate of this planet.

The glomalin-related soil protein (GRSP) is an important component of soil organic carbon (SOC), which plays an important role in maintaining soil structural stability, soil carbon (C), and nitrogen (N) fixation. However, little is known about the GRSP content in soil and its contribution to soil nutrients in plantations of different tree species. In this study, we determined the soil physicochemical characteristics and GRSP contents in different soil layers of four kinds of plantations, including Acacia mangium (AM), Pinus caribaea (PC), Eucalyptus urophylla (EU), and Magnoliaceae glanca (MG), to address how the plantation types affected the GRSP in different layers of soil in southern China. The results showed that with an increase in soil depth, the GRSP content decreased linearly, and the contribution rate of GRSP to SOC and total nitrogen (TN) in deep soil was 1.08–1.18 times that in surface soil. The tree species significantly affected the vertical distribution of GRSP in soil. Among the four plantations, the conifer species PC had the highest level of GRSP, while the N-fixing species AM had the lowest level. However, SOC, soil capillary porosity (CP), TN, soil water content (SWC), and total phosphorus (TP) were important factors regulating soil GRSP content. Additionally, the regulation effects of soil properties on GRSP were various in surface and deep soil among different plantations. In order to improve soil quality and C sequestration potential, conifer species can be planted appropriately, or conifer species and N-fixing species can be mixed to increase soil nutrient content and enhance soil structure and function in afforestation of southern China.