Search

Branchiura are a crustacean parasite widely known around the world as fish lice. In South America, they have been most studied in Brazil as with high levels of infestation, the parasites can be harmful to the health of fish and cause economic losses in fish farms. The objective of the present study is to provide, for the first time, significant information about the parasitic indices, infestation sites, and morphology of Dolops carvalhoi, and to report the appearance of a new host in the Amazon region of Peru. A total of 24 specimens of Colossoma macropomum, Piaractus brachypomus, and Calophysus macropterus from fish farms were individually analyzed to identify the presence of the ectoparasites. The Branchiura collected from the body surfaces of the fish were separated according to sex, the parasitic indices were calculated, and the parasites were clarified in 90% lactic acid for taxonomic identification. They were also preserved in 2.5% glutaraldehyde, and dehydration and critical point procedures were applied by scanning electron microscopy to visualize the detailed structures. The taxa identified was D. carvalhoi, which had a prevalence of 64.7%, a mean intensity of 1.6, and a mean abundance of 1 parasite/fish in C. macropterus; a prevalence of 100%, a mean intensity, and mean abundance of 2.8 parasites/fish in P. brachypomus; and a prevalence of 100%, but a mean intensity and mean abundance of 15 parasites/fish in C. macropomum. The pectoral and dorsal fins and the urogenital opening had the highest occurrence of D. carvalhoi in the host. Dolops carvalhoi has sexual dimorphism, and we reported for the first time the infestation of this parasite in leather fish C. macropterus. [ABSTRACT FROM AUTHOR]

Copyright of Environmental & Social Management Journal / Revista de Gestão Social e Ambiental is the property of Environmental & Social Management Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental & Social Management Journal / Revista de Gestão Social e Ambiental is the property of Environmental & Social Management Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

New taxonomic and faunistic data on spiders of Ecuador are provided, based on a small set of previously unstudied specimens collected at Tiputini Biodiversity Station in Orellana. These specimens belong to five species in three families: Anapistula tiputiana sp. n. (♀; Symphytognathidae) and Pseudanapis yasunica sp. n. (♂; Anapidae) are described as new to science, and the hersiliids Neotama obatala Rheims & Brescovit, 2004, Ypypuera crucifera (Vellard, 1924) and Y. vittata (Simon, 1887) are newly recorded in Ecuador. Illustrations are provided for all treated species. [ABSTRACT FROM AUTHOR]

Copyright of Environmental & Social Management Journal / Revista de Gestão Social e Ambiental is the property of Environmental & Social Management Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Environmental & Social Management Journal / Revista de Gestão Social e Ambiental is the property of Environmental & Social Management Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Historical climatic and geological events are largely known to have impacted biome evolution across the Neotropics and their associated rich biodiversity. However, a clear understanding of dispersal and biome shifts between neotropical biomes over time is still lacking for many ecologically important plant clades. We investigated the timing and ancestral species movements within the early branching papilionoid legume Dipterygeae lineage of neotropical tree species, some of which are among the most ecologically dominant across Amazonian rainforests and Brazilian savannas, to understand how dispersal and evolutionary trajectories in biome predilection have led to their modern distribution. We also estimated the evolution of fruit types and discuss their potential roles in the colonization of non-Amazonian rainforest habitats. To address these questions, we used one nuclear (ITS/5.8S) and two plastid (matK and trnL intron) DNA regions of the Dipterygeae clade to estimate divergence times with a Bayesian relaxed-clock approach, ancestral area distribution, and evolutionary shifts in biome and morphological traits. All currently recognized species of this clade were sampled, covering its full geographical range. Dipterygeae originated in the Amazonia during the Middle Eocene, where it has undergone a long history of in situ diversification, particularly over the last 15 Myr. Dispersal events into the rainforests of the Brazilian Coastal Atlantic Forest and Chocó + Central America, the fire-prone savannas of the Cerrado, and the Caatinga seasonally dry tropical forest occurred independently. Most lineages ecologically associated with rainforests are dispersed by animals (zoochory), whereas shifts to open habitats generally coincide with wind dispersal (anemochory). Our study highlights the significance of geological events, climatic factors, and shifts in fruit type as crucial contributors to the diversification of Dipterygeae. [ABSTRACT FROM AUTHOR]

Copyright of GeSec: Revista de Gestao e Secretariado is the property of Sindicato das Secretarias e Secretarios do Estado de Sao Paulo (SINSESP) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Aims: Knowledge about species niches along environmental gradients is needed to understand community assembly and spatial variation in floristic composition and species richness. In Amazonian rainforests, such knowledge is largely lacking, although ferns have been used to infer overall floristic and edaphic patterns. Here we explore fern species distributions along an important edaphic gradient, how narrow their realised niches are and how sensitive inferences are to species commonness, data quality and the region being sampled. Location: Amazonia. Methods: We used a large data set (1,215 transects across lowland Amazonia) to explore the realised niches of 54 species of two fern genera (Adiantum and Lindsaea) along a soil base cation concentration gradient. We used weighted averaging to estimate species optima and niche widths, and Huisman–Olff–Fresco modelling to assess species response shapes. Results: Overall, species optima were rather evenly spread along the soil base cation concentration gradient, but Lindsaea optima were limited to the lower half of the gradient, whereas Adiantum optima were more often in the upper half. Most species had unimodal response curves. Mean niche width was ca. 25% of the observed gradient length for Adiantum and 17% for Lindsaea and was only weakly or not at all related to different aspects of species commonness. Species optima were robust to different modelling approaches and consistent across regional subsets. However, the central Amazonian data contained no transects with high soil base cation concentration, so species with high optima were either absent or obtained a lower optimum than in the NW and SW regions. Conclusions: Our results support niche‐related species sorting as an important process that defines species co‐occurrence, turnover and richness patterns within Amazonian rainforests. All Adiantum and Lindsaea species, including the most abundant ones, had narrow enough realised niches to be considered useful indicators of edaphic and floristic variation within the rainforest. [ABSTRACT FROM AUTHOR]

The bushy-tailed opossum Glironia venusta is a rare marsupial from Amazonia, with most of the known records obtained through scant visualization/photography events or by few captures/deposit of specimens in scientific collections. This study presents unusual records for the species: the first record of individuals dead due to vehicle collision, and a specimen opportunistically trapped into a mistnet. The data presented herein provide additional morphometrical data and ecological insights about G. venusta. Although this species is considered essentially arboreal, our records indicate that movements on ground are part of its habits. [ABSTRACT FROM AUTHOR]

Summary: In this article we propose a new Catasetum species which presents affinity to the C. cristatum alliance, more specifically to species belonging to the C. barbatum complex. The new species has been found in the flooded forests of the Nhamundá River which constitutes the interstate limit between the States of Amazonas and Pará in Brazil. Plants were collected in flooded forest on the river's left bank, in the municipality of Faro (Pará State, Brazil). The new species is here described in detail and data on habitat, distribution, phenology, conservation status are presented, along with photographs. The new species is compared to C. garnettianum, C. nhamundaense and C. barbatum, from which it differs mainly in the lip structure. All of these allied species are part of the Catasetum barbatum species complex. We also provide an identification key for Catasetum species from the C. barbatum complex occurring in the Brazilian Amazon. [ABSTRACT FROM AUTHOR]

Summary: During the preparation of a taxonomic revision of Theobroma sensu lato (Malvaceae, Byttnerioideae), three new species of T. sect. Herrania were found: Theobroma globosum, T. nervosum and T. schultesii, which are described herein. Theobroma globosum and T. nervosum belong to T. sect. Herrania subsect. Subcymbicalyx, with species mostly found in the Amazon Basin, characterised, among other features, by petal ligules at least ten times longer than the petal claws. Theobroma schultesii is from T. sect. Herrania subsect. Herrania, with species with petal ligules less than ten times longer than the claw and is mainly found in the southern parts of the Caribbean Sea, the Pacific Ocean, western Colombia, and northern Ecuador. Theobroma globosum is diagnosed by the combination of spherical fruits with smaller leaflets and midrib proportions when compared to other species from the same region. Theobroma nervosum is identified by its toothed, obovate leaflets with secondary veins protruding beyond the leaflet margins, forming elongated projections across the entire leaflet. Theobroma schultesii exhibits a unique set of features in T. sect. Herrania subsect. Herrania, having both petiolulate leaflets and a cupuliform calyx. [ABSTRACT FROM AUTHOR]

Simple Summary: In our research conducted in seven citrus orchards in Amazonas State, Brazil, we recorded the presence of eight sharpshooter species. One of the identified species is known to transmit the bacterium Xylella fastidiosa, which is responsible for causing citrus variegated chlorosis (CVC). Among the eight species found, five were newly recorded in citrus plants within the State, and three were entirely new to the northern region. This research emphasizes the importance of mapping the locations of these insects to gain insights into their behavior. Doing so will enable the development of strategies to effectively manage the threat of CVC in local citrus crops. This research study reports new records of eight species of Cicadellini (Hemiptera, Cicadellidae, Cicadellinae) across seven municipalities in Amazonas State, Brazil. Among these species, one is known as a vector of CVC (Provancherana corniculata). Additionally, five species are being reported for the first time in citrus for the State (Erythrogonia sexguttata, Hortensia similis, Provancherana corniculata, Scopogonalia amazonensis, and Scoposcartula oculata), and three species (Diedrocephala variegata, Macugonalia moesta and Xyphon reticulatum) are reported for the first time in the northern region. This research highlights the lack of information on sharpshooter occurrence in the Amazonas region, emphasizing the need for further investigations in this area. [ABSTRACT FROM AUTHOR]

Copyright of O Social em Questão is the property of Faculdades Catolicas - Pontificia Universidade Catolica do Rio de Janeiro and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of HiSTOReLo: Revista de Historia Regional y Local is the property of Universidad Nacional de Colombia, Centro Editorial Facultad de Ciencias Humanas y Economicas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study describes the characteristics of forest fragments occupied by a Critically Endangered endemic Peruvian primate, the San Martín titi monkey, Plecturocebus oenanthe (Pitheciidae; Platyrrhini). We selected 45 fragments; 20 had already been surveyed in 2015 by the Proyecto Mono Tocón (six of these had been further split, resulting in 27 fragments); an additional 18 fragments were randomly selected from satellite images. We surveyed these fragments for the presence of P. oenanthe and determined characteristics of the fragments (size, shape, tree density, canopy height) and of the landscape (distance to nearest fragment and road). We also examined changes in the number of fragments and in forest cover between 2015 and 2019. We encountered P. oenanthe in all surveyed fragments except for the smallest one (0.2 ha). Our findings suggest that P. oenanthe can persist in fragments with a wide range of characteristics, particularly with regard to size and tree density. Unless fragmentation continues and overall forest cover in the area diminishes further, the species may be able to persist even in a fragmented landscape, provided that the matrix allows for movements between fragments. However, persistence might not be long-term if groups are not reproductive, populations become too small, and reduced gene flow results in inbreeding. [ABSTRACT FROM AUTHOR]

Copyright of Environmental & Social Management Journal / Revista de Gestão Social e Ambiental is the property of Environmental & Social Management Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Residents of remote areas in the Amazon often lack access to a water supply system and thus need to produce their potable water at home. This study examined the efficacy of household water treatments traditionally used by these communities to treat rainwater and river water, their predominant water sources. Samples of untreated, treated, and stored drinking water were collected from 18 households in three communities in Central Amazon, Amazonas State, Brazil. We describe the materials and practices involved and traditionally used in each treatment technique - cloth filtration (water straining), chlorination, and sedimentation, and their efficiency. In the samples we evaluate water quality analyses, as free chlorine, color, coliforms, and turbidity. The treatment steps for the separation of solids in river water were effective only for removing turbidity and apparent color. Straining river water after sedimentation had no relevant effect on water quality. Chlorination of rainwater was efficient in inactivating Escherichia coli; however, all samples showed some level of contamination by E. coli. We found a significant difference (p < 0.05) between untreated and treated river water turbidity, reduced by up to 22%. Untreated rain and river waters showed similar levels of microbiological contamination, close to 3.5 log CFU/100 mL of E. coli. Chlorine effectively removed microbiological contaminants in rainwater (median removal of 100, 44.5% of samples with <1 CFU/100 mL). Yet, this treatment was less effective for river water (94% median removal, with 11% of samples with <100 CFU/100 mL and only 5.5% with <1 CFU/100 mL found in treated water), showing a significant reduction in both cases when the Wilcoxon test was applied. Sodium hypochlorite treatment showed the best results among the techniques evaluated in this study. It can be used in remote areas where rainwater is available for consumption. Microorganism concentration increased after water underwent water straining and sedimentation processes. These results suggest that the improper handling of water containers and materials used during treatment processes leads to contamination of water. Thus, more robust outreach and educational efforts are recommended to improve remote communities' water collection, treatment, and storage practices. [ABSTRACT FROM AUTHOR]

Passive restoration of secondary forests can partially offset loss of biodiversity following tropical deforestation. Tree cavities, an essential resource for cavity-nesting birds, are usually associated with old forest. We investigated the restoration time for tree cavities suitable for cavity-nesting birds in secondary forest at the Biological Dynamics of Forest Fragments Project (BDFFP) in central Amazonian Brazil. We hypothesized that cavity abundance would increase with forest age, but more rapidly in areas exposed to cutting only, compared to areas where forest was cut and burned. We also hypothesized that cavities would be lower, smaller, and less variable in secondary forest than in old-growth forest, which at the BDFFP is part of a vast lowland forest with no recent history of human disturbance. We used pole-mounted cameras and tree-climbing to survey cavities in 39 plots (each 200 × 40 m) across old-growth forests and 11–34-year-old secondary forests. We used generalized linear models to examine how cavity supply was related to forest age and land-use history (cut only vs cut-and-burn), and principal components analysis to compare cavity characteristics between old-growth and secondary forest. Cavity availability increased with secondary forest age, regardless of land-use history, but the oldest secondary forest (31–34 years) still had fewer cavities (mean ± SE = 9.8 ± 2.2 cavities ha–1) than old-growth forest (20.5 ± 4.2 cavities ha–1). Moreover, secondary forests lacked cavities that were high and deep, with large entrances—characteristics likely to be important for many species of cavity-nesting birds. Several decades may be necessary to restore cavity supply in secondary Amazonian forests, especially for the largest birds (e.g. forest-falcons and parrots > 190 g). Retention of legacy trees as forest is cleared might help maintain a supply of cavities that could allow earlier recolonization by some species of cavity-nesting birds when cleared areas are abandoned. A Portuguese version of this article is available in Supplementary Material 1. [ABSTRACT FROM AUTHOR]

Copyright of Revista INVI is the property of Universidad de Chile and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Conservation Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Brazilian Journalism Research is the property of Sur le journalisme, About journalism, Sobre jornalismo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In 2023, most parts of the world experienced exceptional heat. In particular, anomalous warm temperatures and heatwave events were evidenced across South America during the second half of the year. The situation was particularly critical in the Amazon region in terms of not only hydrometeorological drought but also ecological and socioeconomic impacts. In this study, remote-sensing data collected from the Moderate Resolution Imaging Spectroradiometer (MODIS) were used to observe the changes in temperature and vegetation across Amazonia during the exceptional drought of 2023. This analysis was based on anomalies in the land surface temperature (LST) and vegetation indices: the enhanced vegetation index (EVI) and the normalized difference vegetation index (NDVI). The amplitude of the LST (AMP-LST), an indicator of the energy partitioning between the latent and sensible heat flux, and fire counts were also considered. The results show widespread and extreme warming across Amazonia during the austral spring in 2023, accompanied by a decline in vegetation greenness, water stress conditions across northern Amazonia, and an enhanced fire occurrence across central and northern Amazonia. [ABSTRACT FROM AUTHOR]

Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mundo Amazónico is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Canadian Journal of Latin American & Caribbean Studies (Routledge) is the property of Routledge and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Territorios: Revista de Estudios Regionales y Urbanos is the property of Universidad de los Andes and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista em Agronegócio e Meio Ambiente is the property of Revista em Agronegocio e Meio Ambiente and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Scientia Agropecuaria is the property of Scientia Agropecuaria and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of American Journal of Primatology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Water & Landscape (WAL) / Agua & Territorio (AYT) is the property of Editorial de la Universidad de Jaen and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of ESPecialist is the property of ESPecialist and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of ESPecialist is the property of ESPecialist and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The diversity of Rubus in South America is much understudied and a taxonomic framework needs to be established as a basis for future revisionary and phylogenetic work. Our review identified 110 names based on South American specimens which were published since 1767. Each name was then classified according to its botanical description and type material. Additionally, where necessary, we suggest appropriate lecto-, neo-, or epitypes. A comprehensive list of synonyms is provided and representative herbarium specimens for each country are cited to tentatively document geographical range. In total, we accept 46 species of Rubus recorded across South America, propose 19 new synonyms, restore R. organensis, previously a synonym of R. brasiliensis, provide a replacement name for the latter, and include new country records of R. azuayensis, R. laegaardii and R. rusbyi. This checklist serves as an essential starting point for future monographic and evolutionary studies on Rubus in South America. [ABSTRACT FROM AUTHOR]

Bonnetia is the most representative genus of the Pantepui woody flora and is among the groups with the greatest endemism in the local flora. The genus has 28 currently recognized species in tropical America, 26 of them endemic to the Pantepui. Here we describe Bonnetia ayangannensis from the summit of Mount Ayanganna tepui in Guyana, providing a morphological description, illustrations, distribution maps, characterization of micromorphology under scanning electron microscopy and leaf venation, comments comparing the new species with closely related species, and a key for the identification of the species of Bonnetia occurring in Guyana. With its restricted distribution threatened by climate change, Bonnetia ayangannensis is assessed in the conservation threat category of Critically Endangered. Its description raises the number of endemic species of Bonnetia in the Pantepui to 27. [ABSTRACT FROM AUTHOR]

Assai (Euterpe oleracea Martius) is a superfruit widely consumed in several countries, mainly produced in the Amazon region. The significant growth of the market for this fruit has raised environmental concerns regarding the disposal of production waste, especially the seeds that are not utilized and represent approximately 80% of the fruit. In the present study, strategies were developed for transforming these seed wastes into new products, using green solvents for extraction under conditions conducive to technology transfer and with feasible quality control through simple bench techniques, which represents an ideal approach for establishing a truly sustainable process. A significant interaction between solvent and extraction method was observed, impacting both yields and total phenols. Phenolic compounds are substances known for their health benefits, functioning as antioxidants and consequently aiding in disease prevention. The phenolic content observed in the extractions increased from 22.68% to 44.74% under optimal conditions during extraction via hot maceration (50 °C) in 100% ethanol for 2 h, which also enhanced yield and increased antioxidant capacity. The extracts displayed remarkable free radical scavenging activities (IC50 = 6.54 μg/mL in ABTS and IC50 = 14.71 μg/mL in DPPH), approaching the Trolox and quercetin standards, respectively. The optimized method paved the way for the industrial-scale utilization of the residues of this valuable Amazonian fruit. [ABSTRACT FROM AUTHOR]

Purpose: Over the past decade, the Amazon basin has faced numerous infectious epidemics. Our comprehension of the actual extent of these infections during pregnancy remains limited. This study aimed to clarify the clinical and epidemiological features of emerging and re-emerging infectious diseases during pregnancy in western French Guiana and along the Maroni River over the previous nine years. Methods: This retrospective cohort study enrolled pregnant women living in west French Guiana territory and giving birth in the only local referral center after 22 weeks of gestation between 2013 and 2021. Data on symptomatic or asymptomatic biologically confirmed emerging or re-emerging diseases during pregnancy was collected. Results: Six epidemic waves were experienced during the study period, including 498 confirmed Zika virus infections (2016), 363 SARS-CoV-2 infections (2020–2021), 87 chikungunya virus infections (2014), 76 syphilis infections (2013–2021), and 60 dengue virus infections (2013–2021) at different gestational ages. Furthermore, 1.1% (n = 287) and 1.4% (n = 350) of pregnant women in west French Guiana were living with HIV and HTLV, respectively. During the study period, at least 5.5% (n = 1,371) faced an emerging or re-emerging infection during pregnancy. Conclusion: These results highlight the diversity, abundance, and dynamism of emerging and re-emerging infectious agents faced by pregnant women in the Amazon basin. Considering the maternal and neonatal adverse outcomes associated with these infections, increased efforts are required to enhance diagnosis, reporting, and treatment of these conditions. [ABSTRACT FROM AUTHOR]

The Amazonian cacao tree or the chocolate tree (Theobroma cacao L.) is cultivated to produce seeds, the valuable raw material for the chocolate industry. However, cacao yield is hampered by diseases and low productivity. Cacao single nucleotide polymorphism (SNP) markers associated with breeding and adaptive traits provide a genetic tool for improving selection and reducing breeding cycles. Here, we genotyped 40 published SNPs associated with disease resistance and 11 SNPs with yield traits in 346 accessions using the MassARRAY® system. These 51 SNPs were identified in different breeding experiments in Costa Rica, Brazil, and Trinidad and Tobago. Four genetic clusters were identified, and two of them were observed in high proportion in managed cacao, characterized by a high proportion of admixed individuals reflecting the man-made hybrids. One cluster overrepresented in managed cacao is associated with the preference to keep superior flavor in cultivated cacao from Criollo ancestry. Introgression of wild material collected in Peru associated with disease resistance to witches' broom disease (WBD) was also observed. Underutilized genetic resources were observed in managed cacao such as the Guiana cacao, while previous agronomic evaluation has demonstrated its good yield potential. Yield and disease resistance traits (mainly resistance to WBD) show divergence between wild and managed cacao (FST > 0.05) probably reflecting selection during domestication, cultivation, and breeding efforts. Eleven SNPs showed a divergence between wild and managed cacao and can be used to build breeding populations. New collections of wild cacao followed by agronomic evaluations can broaden the genetic base of cultivated cacao, especially for such traits as disease resistance to frosty pod rot (FPR). [ABSTRACT FROM AUTHOR]

Affects and emotions serve as tools of governance in settler urbanism, facilitating colonial dispossession and control of Indigenous land. Drawing on modernist logics, housing projects in indigenous territory seek to instill fixity and urban orders on mobile Indigenous populations through the management of fear and uncertainty. Here we examine the production of emotions associated with the development of the Pañacocha Millennium Community, a public housing project in the Petroamazonas oilfields of what was once Indigenous Kichwa territory in Ecuadorian Amazonia. We draw on research in Indigenous planning, the geographies of emotion, and critical urban studies to demonstrate the emotional impacts of the imposition of colonial governmental logics of housing production in Indigenous lands. At the same time, we examine the limitations of settler urbanist governance through emotion by documenting the embodied Indigenous relations with land, housing, and mobility captured in the concept territorio cuerpo-tierra, which has led to various forms of resistance and avoidance to the housing project. The case of the Pañacocha Millennium Community illuminates the role of emotion in urban planning and settler urbanism, in particular, and contributes to emerging work in Indigenous and decolonial planning. [ABSTRACT FROM AUTHOR]

Copyright of People & Nature is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Simple Summary: In the northwestern Colombian Amazon, ticks are a significant issue for dairy cattle in the northwestern Colombian Amazon, affecting the animals' health and the productivity of farms. Our study aimed to identify the most common types of ticks in this area and how environmental factors such as temperature and rainfall affect their numbers. We discovered that only one kind of tick dominates in this region. Interestingly, we found that these ticks are more abundant during warmer and drier months, especially affecting a certain type of cattle more than others. Based on our findings, we recommend that farmers implement tick control measures directly on the cattle and in the pastures where these animals graze more frequently during warmer periods. This dual approach is crucial for effectively managing tick populations, promoting animal health, and ensuring dairy farms' efficient operation. This research is valuable for local farmers and could also benefit agricultural practices in similar environments worldwide. Cattle ticks are a significant health concern in tropical livestock production due to their hematophagous behavior and potential as vectors for human and animal pathogens. In this study, we investigated the tick population present in dairy cattle production, calves, and grazing areas of livestock systems in the northwestern Colombian Amazon. Identification was based on taxonomic keys and molecular markers. Phylogenetic relationships were established using mitochondrial COX1 and 16S genes. Population structure analysis was performed considering age, racial type (B. indicus vs. B. taurus), and the influence of environmental factors and the geomorphological landscape on tick population dynamics. Our findings revealed the presence of a single tick species, with a unique haplotype identified for each mitochondrial gene assessed. Phylogenetic analysis classified the found species within Clade A of the Rhipicephalus microplus complex. Ticks were more prevalent during periods of low rainfall and high temperature, and B. taurus cows exhibited the highest tick abundance. Thus, these results provide insights into the population characteristics and distribution of the tick species present in dairy cattle production systems in the northwestern part of the Colombian Amazon. This information is fundamental for developing targeted strategies based on seasonal variation and host characteristics to mitigate tick infestation severity in the region. [ABSTRACT FROM AUTHOR]

Environments are gendered and environmental issues have impacts on gender. This introduction highlights some current environmental issues from the ecofeminist perspective that characterizes the contributions and summarizes the chapters in the volume that feature the activities of indigenous women in the Columbian Amazon, urban environments in Athens and Rome, workplace environments in Bangladeshi offices, STEM labs in universities in the United States, and homes used for sex work in Punjab. It ends with a suggestion for a queer spiritual ecofeminist approach to environments. [ABSTRACT FROM AUTHOR]

Women's indigenous organizations have existed for years in the Colombian Amazon. Yet, information about their members' motivations and the opportunities and barriers those organizations face is missing in the literature on the indigenous movement, ecofeminist struggles, and efforts for a good life in Colombia. This chapter analyzes the connection between women's indigenous organizations and the territory's efforts to contain climate change. Two sources inform our understanding of the relationship: the systematization of the main program in Colombian institutional history supporting indigenous women's led associations linked to conservation efforts, "Women Caregivers of the Amazon" and the mapping of indigenous women's organizations in the region. This chapter offers a critical impact evaluation of the program "Women Caregivers of the Amazon," analyzing the way in which the ecological native discourse, particularly on environmental practices of indigenous women, has permeated conservation initiatives in the Colombian Amazon. The impact this has had on women's participation in self-governance and environmental governance remains to be analyzed. However, mapping indigenous women's organizations in 2021 offered relevant information on those organizations and their care and conservation practices in the Amazon Forest. In turn, the systematization of "Caregivers of the Amazon" results offers an updated analysis of the scope, limitations, best practices, and lessons learned in developing the projects. A longitudinal and comparative analysis of these two sources of information will lead to an understanding of the incidence of intergovernmental and civil society actions for mitigation and adaptation to climate change carried out by indig-enous women's organizations. [ABSTRACT FROM AUTHOR]

Copyright of Ecología Política is the property of Fundacio ENT and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ecología Política is the property of Fundacio ENT and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Latin American & Caribbean Anthropology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)