32 results on '"Roscher, C."'
Search Results
2. Effects of plant diversity on species-specific herbivory: patterns and mechanisms
- Author
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Bröcher, M., Ebeling, A., Hertzog, L., Roscher, C., Weisser, W., and Meyer, S. T.
- Published
- 2023
- Full Text
- View/download PDF
3. Plant geographic distribution influences chemical defenses in native and introduced Plantago lanceolata populations
- Author
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Medina van Berkum, P., Schmöckel, E., Bischoff, A., Carrasco-Farias, N., Catford, J., Feldmann, R., Groten, K., Henry, H., Bucharova, A., Hänniger, S., Luong, J., Meis, J., Oetama, V., Pärtel, M., Power, S., Villellas, J., Welk, E., Wingler, A., Rothe, B., Gershenzon, J., Reichelt, M., Roscher, C., and Unsicker, S.
- Published
- 2023
4. Nitrogen but not phosphorus addition affects symbiotic N2 fixation by legumes in natural and semi-natural grasslands located on four continents
- Author
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Vazquez, E., Schleuss, P-M, Borer, E.T., Bugalho, M.N., Caldeira, M.C., Eisenhauer, N., Eskelinen, A., Fay, P.A., Haider, S., Jentsch, A., Kirkman, K.P., McCulley, R.L., Peri, P.L., Price, J., Richards, A.E., Risch, A.C., Roscher, C., Schutz, M., Seabloom, E.W., Standish, R.J., Stevens, C.J., Tedder, M.J., Virtanen, R., Spohn, M., Vazquez, E., Schleuss, P-M, Borer, E.T., Bugalho, M.N., Caldeira, M.C., Eisenhauer, N., Eskelinen, A., Fay, P.A., Haider, S., Jentsch, A., Kirkman, K.P., McCulley, R.L., Peri, P.L., Price, J., Richards, A.E., Risch, A.C., Roscher, C., Schutz, M., Seabloom, E.W., Standish, R.J., Stevens, C.J., Tedder, M.J., Virtanen, R., and Spohn, M.
- Abstract
Background and aims The amount of nitrogen (N) derived from symbiotic N2 fixation by legumes in grasslands might be affected by anthropogenic N and phosphorus (P) inputs, but the underlying mechanisms are not known. Methods We evaluated symbiotic N2 fixation in 17 natural and semi-natural grasslands on four continents that are subjected to the same full-factorial N and P addition experiment, using the 15N natural abundance method. Results N as well as combined N and P (NP) addition reduced aboveground legume biomass by 65% and 45%, respectively, compared to the control, whereas P addition had no significant impact. Addition of N and/or P had no significant effect on the symbiotic N2 fixation per unit legume biomass. In consequence, the amount of N fixed annually per grassland area was less than half in the N addition treatments compared to control and P addition, irrespective of whether the dominant legumes were annuals or perennials. Conclusion Our results reveal that N addition mainly impacts symbiotic N2 fixation via reduced biomass of legumes rather than changes in N2 fixation per unit legume biomass. The results show that soil N enrichment by anthropogenic activities significantly reduces N2 fixation in grasslands, and these effects cannot be reversed by additional P amendment.
- Published
- 2022
5. Nitrogen but not phosphorus addition affects symbiotic N₂ fixation by legumes in natural and semi-natural grasslands located on four continents
- Author
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Vázquez, E. (Eduardo), Schleuss, P.-M. (Per-Marten), Borer, E. T. (Elizabeth T.), Bugalho, M. N. (Miguel N.), Caldeira, M. C. (Maria C.), Eisenhauer, N. (Nico), Eskelinen, A. (Anu), Fay, P. A. (Philip A.), Haider, S. (Sylvia), Jentsch, A. (Anke), Kirkman, K. P. (Kevin P.), McCulley, R. L. (Rebecca L.), Peri, P. L. (Pablo L.), Price, J. (Jodi), Richards, A. E. (Anna E.), Risch, A. C. (Anita C.), Roscher, C. (Christiane), Schütz, M. (Martin), Seabloom, E. W. (Eric W.), Standish, R. J. (Rachel J.), Stevens, C. J. (Carly J.), Tedder, M. J. (Michelle J.), Virtanen, R. (Risto), Spohn, M. (Marie), Vázquez, E. (Eduardo), Schleuss, P.-M. (Per-Marten), Borer, E. T. (Elizabeth T.), Bugalho, M. N. (Miguel N.), Caldeira, M. C. (Maria C.), Eisenhauer, N. (Nico), Eskelinen, A. (Anu), Fay, P. A. (Philip A.), Haider, S. (Sylvia), Jentsch, A. (Anke), Kirkman, K. P. (Kevin P.), McCulley, R. L. (Rebecca L.), Peri, P. L. (Pablo L.), Price, J. (Jodi), Richards, A. E. (Anna E.), Risch, A. C. (Anita C.), Roscher, C. (Christiane), Schütz, M. (Martin), Seabloom, E. W. (Eric W.), Standish, R. J. (Rachel J.), Stevens, C. J. (Carly J.), Tedder, M. J. (Michelle J.), Virtanen, R. (Risto), and Spohn, M. (Marie)
- Abstract
Background and aims: The amount of nitrogen (N) derived from symbiotic N₂ fixation by legumes in grasslands might be affected by anthropogenic N and phosphorus (P) inputs, but the underlying mechanisms are not known. Methods: We evaluated symbiotic N₂ fixation in 17 natural and semi-natural grasslands on four continents that are subjected to the same full-factorial N and P addition experiment, using the ¹⁵N natural abundance method. Results: N as well as combined N and P (NP) addition reduced aboveground legume biomass by 65% and 45%, respectively, compared to the control, whereas P addition had no significant impact. Addition of N and/or P had no significant effect on the symbiotic N₂ fixation per unit legume biomass. In consequence, the amount of N fixed annually per grassland area was less than half in the N addition treatments compared to control and P addition, irrespective of whether the dominant legumes were annuals or perennials. Conclusion: Our results reveal that N addition mainly impacts symbiotic N₂ fixation via reduced biomass of legumes rather than changes in N₂ fixation per unit legume biomass. The results show that soil N enrichment by anthropogenic activities significantly reduces N₂ fixation in grasslands, and these effects cannot be reversed by additional P amendment.
- Published
- 2022
6. Linking changes in species composition and biomass in a globally distributed grassland experiment
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Ladeuceur, E, Blowes, S, Chase, J, Clark, A., Grabowski, M, Alberti, Juan, Arnillas, C.A., Bharath, Siddharth, Borer, E.T., Brudvig, Lars A., Cadotte, Marc, Chen, Q.Q., Collins, Scott, Dickman, C. R., Donohue, C, Du, GZ, Ebling, A, Eisenhauer, N., Fay, P.A., Hagenah, N., Hautier, Y., Anke, J, Jonsottir, I.S., Komatsu, K.J., MacDougall, A.S., Martina, J.P., Moore, J., Morgan, J., Peri, Paolo, Power, S.A., Zhengwei, R, Risch, A., Roscher, C., Schuchardt, C, Seabloom, Eric W., Stevens, Carly, Veen, C, Virtanen, R, Wardle, Glenda M., Wilfahrt, P.A., Harpole, W.S., Ladeuceur, E, Blowes, S, Chase, J, Clark, A., Grabowski, M, Alberti, Juan, Arnillas, C.A., Bharath, Siddharth, Borer, E.T., Brudvig, Lars A., Cadotte, Marc, Chen, Q.Q., Collins, Scott, Dickman, C. R., Donohue, C, Du, GZ, Ebling, A, Eisenhauer, N., Fay, P.A., Hagenah, N., Hautier, Y., Anke, J, Jonsottir, I.S., Komatsu, K.J., MacDougall, A.S., Martina, J.P., Moore, J., Morgan, J., Peri, Paolo, Power, S.A., Zhengwei, R, Risch, A., Roscher, C., Schuchardt, C, Seabloom, Eric W., Stevens, Carly, Veen, C, Virtanen, R, Wardle, Glenda M., Wilfahrt, P.A., and Harpole, W.S.
- Published
- 2022
7. Nutrient enrichment increases invertebrate herbivory and pathogen damage in grasslands
- Author
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Ebeling, A. (Anne), Strauss, A. T. (Alex T.), Adler, P. B. (Peter B.), Arnillas, C. A. (Carlos A.), Barrio, I. C. (Isabel C.), Biederman, L. A. (Lori A.), Borer, E. T. (Elizabeth T.), Bugalho, M. N. (Miguel N.), Caldeira, M. C. (Maria C.), Cadotte, M. W. (Marc W.), Daleo, P. (Pedro), Eisenhauer, N. (Nico), Eskelinen, A. (Anu), Fay, P. A. (Philip A.), Firn, J. (Jennifer), Graff, P. (Pamela), Hagenah, N. (Nicole), Haider, S. (Sylvia), Komatsu, K. J. (Kimberly J.), McCulley, R. L. (Rebecca L.), Mitchell, C. E. (Charles E.), Moore, J. L. (Joslin L.), Pascual, J. (Jesus), Peri, P. L. (Pablo L.), Power, S. A. (Sally A.), Prober, S. M. (Suzanne M.), Risch, A. C. (Anita C.), Roscher, C. (Christiane), Sankaran, M. (Mahesh), Seabloom, E. W. (Eric W.), Schielzeth, H. (Holger), Schütz, M. (Martin), Speziale, K. L. (Karina L.), Tedder, M. (Michelle), Virtanen, R. (Risto), Blumenthal, D. M. (Dana M.), Ebeling, A. (Anne), Strauss, A. T. (Alex T.), Adler, P. B. (Peter B.), Arnillas, C. A. (Carlos A.), Barrio, I. C. (Isabel C.), Biederman, L. A. (Lori A.), Borer, E. T. (Elizabeth T.), Bugalho, M. N. (Miguel N.), Caldeira, M. C. (Maria C.), Cadotte, M. W. (Marc W.), Daleo, P. (Pedro), Eisenhauer, N. (Nico), Eskelinen, A. (Anu), Fay, P. A. (Philip A.), Firn, J. (Jennifer), Graff, P. (Pamela), Hagenah, N. (Nicole), Haider, S. (Sylvia), Komatsu, K. J. (Kimberly J.), McCulley, R. L. (Rebecca L.), Mitchell, C. E. (Charles E.), Moore, J. L. (Joslin L.), Pascual, J. (Jesus), Peri, P. L. (Pablo L.), Power, S. A. (Sally A.), Prober, S. M. (Suzanne M.), Risch, A. C. (Anita C.), Roscher, C. (Christiane), Sankaran, M. (Mahesh), Seabloom, E. W. (Eric W.), Schielzeth, H. (Holger), Schütz, M. (Martin), Speziale, K. L. (Karina L.), Tedder, M. (Michelle), Virtanen, R. (Risto), and Blumenthal, D. M. (Dana M.)
- Abstract
1.Plant damage by invertebrate herbivores and pathogens influences the dynamics of grassland ecosystems, but anthropogenic changes in nitrogen and phosphorus availability can modify these relationships. 2.Using a globally distributed experiment, we describe leaf damage on 153 plant taxa from 27 grasslands worldwide, under ambient conditions and with experimentally elevated nitrogen and phosphorus. 3.Invertebrate damage significantly increased with nitrogen addition, especially in grasses and non-leguminous forbs. Pathogen damage increased with nitrogen in grasses and legumes but not forbs. Effects of phosphorus were generally weaker. Damage was higher in grasslands with more precipitation, but climatic conditions did not change effects of nutrients on leaf damage. On average, invertebrate damage was relatively higher on legumes and pathogen damage was relatively higher on grasses. Community-weighted mean damage reflected these functional group patterns, with no effects of N on community-weighted pathogen damage (due to opposing responses of grasses and forbs) but stronger effects of N on community-weighted invertebrate damage (due to consistent responses of grasses and forbs). 4.Synthesis: As human-induced inputs of nitrogen and phosphorus continue to increase, understanding their impacts on invertebrate and pathogen damage becomes increasingly important. Our results demonstrate that eutrophication frequently increases plant damage and that damage increases with precipitation across a wide array of grasslands. Invertebrate and pathogen damage in grasslands is likely to increase in the future, with potential consequences for plant, invertebrate and pathogen communities, as well as the transfer of energy and nutrients across trophic levels.
- Published
- 2022
8. Abiotic factors are more important than land management and biotic interactions in shaping vascular plant and soil fungal communities
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Slabbert, E.L., primary, Knight, T.M., additional, Wubet, T., additional, Kautzner, A., additional, Baessler, C., additional, Auge, H., additional, Roscher, C., additional, and Schweiger, O., additional
- Published
- 2022
- Full Text
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9. Aridity drives the response of soil total and particulate organic carbon to drought in temperate grasslands and shrublands.
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Shi B, Delgado-Baquerizo M, Knapp AK, Smith MD, Reed S, Osborne B, Carrillo Y, Maestre FT, Zhu Y, Chen A, Wilkins K, Holdrege MC, Kulmatiski A, Picon-Cochard C, Roscher C, Power S, Byrne KM, Churchill AC, Jentsch A, Henry HAL, Beard KH, Schuchardt MA, Eisenhauer N, Otfinowski R, Hautier Y, Shen H, Wang Y, Wang Z, Wang C, Cusack DF, Petraglia A, Carbognani M, Forte TGW, Flory S, Hou P, Zhang T, Gao W, and Sun W
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- Ecosystem, Desert Climate, Droughts, Soil chemistry, Carbon metabolism, Grassland
- Abstract
The increasing prevalence of drought events in grasslands and shrublands worldwide potentially has impacts on soil organic carbon (SOC). We leveraged the International Drought Experiment to study how SOC, including particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) concentrations, responds to extreme drought treatments (1-in-100-year) for 1 to 5 years at 19 sites worldwide. In more mesic areas (aridity index > 0.65), SOC and POC concentrations decreased by 7.9% (±3.9) and 15.9% (±6.2) with drought, respectively, but there were no impacts on MAOC concentrations. However, drought had no impact on SOC, POC, or MAOC concentrations in drylands (aridity index < 0.65). The response of SOC to drought varied along an aridity gradient, concomitant with interannual precipitation variability and standing SOC concentration gradients. These findings highlight the differing response magnitudes of POC and MAOC concentrations to drought and the key regulating role of aridity.
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- 2024
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10. CoRRE Trait Data: A dataset of 17 categorical and continuous traits for 4079 grassland species worldwide.
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Komatsu KJ, Avolio ML, Padullés Cubino J, Schrodt F, Auge H, Cavender-Bares J, Clark AT, Flores-Moreno H, Grman E, Harpole WS, Kattge J, Kimmel K, Koerner SE, Korell L, Langley JA, Münkemüller T, Ohlert T, Onstein RE, Roscher C, Soudzilovskaia NA, Taylor BN, Tedersoo L, Terry RS, and Wilcox K
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- Ecosystem, Grassland, Plants classification
- Abstract
In our changing world, understanding plant community responses to global change drivers is critical for predicting future ecosystem composition and function. Plant functional traits promise to be a key predictive tool for many ecosystems, including grasslands; however, their use requires both complete plant community and functional trait data. Yet, representation of these data in global databases is sparse, particularly beyond a handful of most used traits and common species. Here we present the CoRRE Trait Data, spanning 17 traits (9 categorical, 8 continuous) anticipated to predict species' responses to global change for 4,079 vascular plant species across 173 plant families present in 390 grassland experiments from around the world. The dataset contains complete categorical trait records for all 4,079 plant species obtained from a comprehensive literature search, as well as nearly complete coverage (99.97%) of imputed continuous trait values for a subset of 2,927 plant species. These data will shed light on mechanisms underlying population, community, and ecosystem responses to global change in grasslands worldwide., (© 2024. The Author(s).)
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- 2024
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11. Strengths of fertilizer and litter effects on seedling recruitment and growth of grassland species differ depending on functional groups and seed size.
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Martin S and Roscher C
- Abstract
Agricultural grasslands play an important role in conserving the biodiversity of the European cultural landscape. Both, litter cover and soil nutrient availability, change with grassland management, but it is not well-studied how seedling recruitment and growth of multiple grassland species are influenced by their single or combined effects. Therefore, we studied the effects of nitrogen fertilization (100 kg N per year and ha) and litter cover (250 g
dw per m2 ) on seedling recruitment and growth of 75 temperate grassland species (16 graminoid species, 51 forb species, 8 legume species) in a full factorial microcosm experiment. Overall, fertilizer reduced seedling emergence, while litter cover increased it even when combined with fertilization. Fertilization increased seedling height and biomass, and the combination of fertilizer and litter resulted in even stronger responses. Litter cover alone did not influence seedling biomass or seedling height. While the overall direction of treatment effects was similar across functional groups, their strengths were mostly weaker in graminoids than in non-legume forbs and legumes. Positive litter effects on seedling emergence were stronger in large-seeded species. Positive fertilization effects on seedling growth were stronger in small-seeded species, while their seedling biomass was negatively affected by litter cover. In summary, our results show for multiple grassland species that the combination of litter cover and fertilization modulates their single effects. The varying sensitivity of how grassland species representing different functional groups and seed sizes respond with their seedling emergence and growth to litter cover and nitrogen fertilization indicates that the consequences of land-use change on grassland diversity and composition already start to manifest in the earliest stages of the plant life cycle., Competing Interests: The authors declare no conflict of interests., (© 2024 The Author(s). Ecology and Evolution published by John Wiley & Sons Ltd.)- Published
- 2024
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12. Land use modulates resistance of grasslands against future climate and inter-annual climate variability in a large field experiment.
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Korell L, Andrzejak M, Berger S, Durka W, Haider S, Hensen I, Herion Y, Höfner J, Kindermann L, Klotz S, Knight TM, Linstädter A, Madaj AM, Merbach I, Michalski S, Plos C, Roscher C, Schädler M, Welk E, and Auge H
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- Germany, Poaceae growth & development, Poaceae physiology, Seasons, Biodiversity, Temperature, Climate Models, Grassland, Climate Change, Agriculture methods
- Abstract
Climate and land-use change are key drivers of global change. Full-factorial field experiments in which both drivers are manipulated are essential to understand and predict their potentially interactive effects on the structure and functioning of grassland ecosystems. Here, we present 8 years of data on grassland dynamics from the Global Change Experimental Facility in Central Germany. On large experimental plots, temperature and seasonal patterns of precipitation are manipulated by superimposing regional climate model projections onto background climate variability. Climate manipulation is factorially crossed with agricultural land-use scenarios, including intensively used meadows and extensively used (i.e., low-intensity) meadows and pastures. Inter-annual variation of background climate during our study years was high, including three of the driest years on record for our region. The effects of this temporal variability far exceeded the effects of the experimentally imposed climate change on plant species diversity and productivity, especially in the intensively used grasslands sown with only a few grass cultivars. These changes in productivity and diversity in response to alterations in climate were due to immigrant species replacing the target forage cultivars. This shift from forage cultivars to immigrant species may impose additional economic costs in terms of a decreasing forage value and the need for more frequent management measures. In contrast, the extensively used grasslands showed weaker responses to both experimentally manipulated future climate and inter-annual climate variability, suggesting that these diverse grasslands are more resistant to climate change than intensively used, species-poor grasslands. We therefore conclude that a lower management intensity of agricultural grasslands, associated with a higher plant diversity, can stabilize primary productivity under climate change., (Global Change Biology© 2024 The Author(s). Global Change Biology published by John Wiley & Sons Ltd.)
- Published
- 2024
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13. Sustainable land management enhances ecological and economic multifunctionality under ambient and future climate.
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Scherzinger F, Schädler M, Reitz T, Yin R, Auge H, Merbach I, Roscher C, Harpole WS, Blagodatskaya E, Siebert J, Ciobanu M, Marder F, Eisenhauer N, and Quaas M
- Abstract
The currently dominant types of land management are threatening the multifunctionality of ecosystems, which is vital for human well-being. Here, we present a novel ecological-economic assessment of how multifunctionality of agroecosystems in Central Germany depends on land-use type and climate. Our analysis includes 14 ecosystem variables in a large-scale field experiment with five different land-use types under two different climate scenarios (ambient and future climate). We consider ecological multifunctionality measures using averaging approaches with different weights, reflecting preferences of four relevant stakeholders based on adapted survey data. Additionally, we propose an economic multifunctionality measure based on the aggregate economic value of ecosystem services. Results show that intensive management and future climate decrease ecological multifunctionality for most scenarios in both grassland and cropland. Only under a weighting based on farmers' preferences, intensively-managed grassland shows higher multifunctionality than sustainably-managed grassland. The economic multifunctionality measure is about ~1.7 to 1.9 times higher for sustainable, compared to intensive, management for both grassland and cropland. Soil biodiversity correlates positively with ecological multifunctionality and is expected to be one of its drivers. As the currently prevailing land management provides high multifunctionality for farmers, but not for society at large, we suggest to promote and economically incentivise sustainable land management that enhances both ecological and economic multifunctionality, also under future climatic conditions., (© 2024. The Author(s).)
- Published
- 2024
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14. Effects of species diversity on trait expression of the clonal herb Taraxacum officinale and its relation to genotype diversity and phenotypic plasticity.
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De Giorgi F, Roscher C, and Durka W
- Abstract
Plant species respond to varying plant species diversity and associated changes in their abiotic and biotic environment with changes in their phenotype. However, it is not clear to what degree this phenotypic differentiation is due to genotype diversity within populations or phenotypic plasticity of plant individuals. We studied individuals of 16 populations of the clonal herb Taraxacum officinale grown in plant communities of different species richness in a 17-year-old grassland biodiversity experiment (Jena Experiment). We collected 12 individuals in each population to measure phenotypic traits and identify distinct genotypes using microsatellite DNA markers. Plant species richness did not influence population-level genotype and trait diversity. However, it affected the expression of several phenotypic traits, e.g. leaf and inflorescence number, maximum leaf length and seed mass, which increased with increasing plant species richness. Moreover, population-level trait diversity correlated positively with genotype richness for leaf dry matter content (LDMC) and negatively with inflorescence number. For several traits (i.e. seed mass, germination rate, LDMC, specific leaf area (SLA)), a larger portion of variance was explained by genotype identity, while variance in other traits (i.e. number of inflorescences, leaf nitrogen concentration, leaf number, leaf length) resided within genotypes and thus was mostly due to phenotypic plasticity. Overall, our findings show that plant species richness positively affected the population means of some traits related to whole-plant performance, whose variation was achieved through both phenotypic plasticity and genotype composition of a population., Competing Interests: The authors declare no conflict of interest., (© 2024 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)
- Published
- 2024
- Full Text
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15. Cumulative nitrogen enrichment alters the drivers of grassland overyielding.
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He M, Barry KE, Soons MB, Allan E, Cappelli SL, Craven D, Doležal J, Isbell F, Lanta V, Lepš J, Liang M, Mason N, Palmborg C, Pichon NA, da Silveira Pontes L, Reich PB, Roscher C, and Hautier Y
- Subjects
- Nitrogen, Biodiversity, Plants, Ecosystem, Grassland
- Abstract
Effects of plant diversity on grassland productivity, or overyielding, are found to be robust to nutrient enrichment. However, the impact of cumulative nitrogen (N) addition (total N added over time) on overyielding and its drivers are underexplored. Synthesizing data from 15 multi-year grassland biodiversity experiments with N addition, we found that N addition decreases complementarity effects and increases selection effects proportionately, resulting in no overall change in overyielding regardless of N addition rate. However, we observed a convex relationship between overyielding and cumulative N addition, driven by a shift from complementarity to selection effects. This shift suggests diminishing positive interactions and an increasing contribution of a few dominant species with increasing N accumulation. Recognizing the importance of cumulative N addition is vital for understanding its impacts on grassland overyielding, contributing essential insights for biodiversity conservation and ecosystem resilience in the face of increasing N deposition., (© 2024. The Author(s).)
- Published
- 2024
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16. Plant diversity and community age stabilize ecosystem multifunctionality.
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Dietrich P, Ebeling A, Meyer ST, Asato AEB, Bröcher M, Gleixner G, Huang Y, Roscher C, Schmid B, Vogel A, and Eisenhauer N
- Subjects
- Biodiversity, Plants, Soil, Ecosystem, Grassland
- Abstract
It is well known that biodiversity positively affects ecosystem functioning, leading to enhanced ecosystem stability. However, this knowledge is mainly based on analyses using single ecosystem functions, while studies focusing on the stability of ecosystem multifunctionality (EMF) are rare. Taking advantage of a long-term grassland biodiversity experiment, we studied the effect of plant diversity (1-60 species) on EMF over 5 years, its temporal stability, as well as multifunctional resistance and resilience to a 2-year drought event. Using split-plot treatments, we further tested whether a shared history of plants and soil influences the studied relationships. We calculated EMF based on functions related to plants and higher-trophic levels. Plant diversity enhanced EMF in all studied years, and this effect strengthened over the study period. Moreover, plant diversity increased the temporal stability of EMF and fostered resistance to reoccurring drought events. Old plant communities with shared plant and soil history showed a stronger plant diversity-multifunctionality relationship and higher temporal stability of EMF than younger communities without shared histories. Our results highlight the importance of old and biodiverse plant communities for EMF and its stability to extreme climate events in a world increasingly threatened by global change., (© 2024 The Authors. Global Change Biology published by John Wiley & Sons Ltd.)
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- 2024
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17. Extreme drought impacts have been underestimated in grasslands and shrublands globally.
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Smith MD, Wilkins KD, Holdrege MC, Wilfahrt P, Collins SL, Knapp AK, Sala OE, Dukes JS, Phillips RP, Yahdjian L, Gherardi LA, Ohlert T, Beier C, Fraser LH, Jentsch A, Loik ME, Maestre FT, Power SA, Yu Q, Felton AJ, Munson SM, Luo Y, Abdoli H, Abedi M, Alados CL, Alberti J, Alon M, An H, Anacker B, Anderson M, Auge H, Bachle S, Bahalkeh K, Bahn M, Batbaatar A, Bauerle T, Beard KH, Behn K, Beil I, Biancari L, Blindow I, Bondaruk VF, Borer ET, Bork EW, Bruschetti CM, Byrne KM, Cahill JF Jr, Calvo DA, Carbognani M, Cardoni A, Carlyle CN, Castillo-Garcia M, Chang SX, Chieppa J, Cianciaruso MV, Cohen O, Cordeiro AL, Cusack DF, Dahlke S, Daleo P, D'Antonio CM, Dietterich LH, S Doherty T, Dubbert M, Ebeling A, Eisenhauer N, Fischer FM, Forte TGW, Gebauer T, Gozalo B, Greenville AC, Guidoni-Martins KG, Hannusch HJ, Vatsø Haugum S, Hautier Y, Hefting M, Henry HAL, Hoss D, Ingrisch J, Iribarne O, Isbell F, Johnson Y, Jordan S, Kelly EF, Kimmel K, Kreyling J, Kröel-Dulay G, Kröpfl A, Kübert A, Kulmatiski A, Lamb EG, Larsen KS, Larson J, Lawson J, Leder CV, Linstädter A, Liu J, Liu S, Lodge AG, Longo G, Loydi A, Luan J, Curtis Lubbe F, Macfarlane C, Mackie-Haas K, Malyshev AV, Maturano-Ruiz A, Merchant T, Metcalfe DB, Mori AS, Mudongo E, Newman GS, Nielsen UN, Nimmo D, Niu Y, Nobre P, O'Connor RC, Ogaya R, Oñatibia GR, Orbán I, Osborne B, Otfinowski R, Pärtel M, Penuelas J, Peri PL, Peter G, Petraglia A, Picon-Cochard C, Pillar VD, Piñeiro-Guerra JM, Ploughe LW, Plowes RM, Portales-Reyes C, Prober SM, Pueyo Y, Reed SC, Ritchie EG, Rodríguez DA, Rogers WE, Roscher C, Sánchez AM, Santos BA, Cecilia Scarfó M, Seabloom EW, Shi B, Souza L, Stampfli A, Standish RJ, Sternberg M, Sun W, Sünnemann M, Tedder M, Thorvaldsen P, Tian D, Tielbörger K, Valdecantos A, van den Brink L, Vandvik V, Vankoughnett MR, Guri Velle L, Wang C, Wang Y, Wardle GM, Werner C, Wei C, Wiehl G, Williams JL, Wolf AA, Zeiter M, Zhang F, Zhu J, Zong N, and Zuo X
- Subjects
- Grassland, Carbon Cycle, Climate Change, Receptor Protein-Tyrosine Kinases, Droughts, Ecosystem
- Abstract
Climate change is increasing the frequency and severity of short-term (~1 y) drought events-the most common duration of drought-globally. Yet the impact of this intensification of drought on ecosystem functioning remains poorly resolved. This is due in part to the widely disparate approaches ecologists have employed to study drought, variation in the severity and duration of drought studied, and differences among ecosystems in vegetation, edaphic and climatic attributes that can mediate drought impacts. To overcome these problems and better identify the factors that modulate drought responses, we used a coordinated distributed experiment to quantify the impact of short-term drought on grassland and shrubland ecosystems. With a standardized approach, we imposed ~a single year of drought at 100 sites on six continents. Here we show that loss of a foundational ecosystem function-aboveground net primary production (ANPP)-was 60% greater at sites that experienced statistically extreme drought (1-in-100-y event) vs. those sites where drought was nominal (historically more common) in magnitude (35% vs. 21%, respectively). This reduction in a key carbon cycle process with a single year of extreme drought greatly exceeds previously reported losses for grasslands and shrublands. Our global experiment also revealed high variability in drought response but that relative reductions in ANPP were greater in drier ecosystems and those with fewer plant species. Overall, our results demonstrate with unprecedented rigor that the global impacts of projected increases in drought severity have been significantly underestimated and that drier and less diverse sites are likely to be most vulnerable to extreme drought., Competing Interests: Competing interests statement:The authors declare no competing interest.
- Published
- 2024
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18. The positive effect of plant diversity on soil carbon depends on climate.
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Spohn M, Bagchi S, Biederman LA, Borer ET, Bråthen KA, Bugalho MN, Caldeira MC, Catford JA, Collins SL, Eisenhauer N, Hagenah N, Haider S, Hautier Y, Knops JMH, Koerner SE, Laanisto L, Lekberg Y, Martina JP, Martinson H, McCulley RL, Peri PL, Macek P, Power SA, Risch AC, Roscher C, Seabloom EW, Stevens C, Veen GFC, Virtanen R, and Yahdjian L
- Subjects
- Carbon, Biodiversity, Biomass, Plants, Nitrogen, Ecosystem, Soil
- Abstract
Little is currently known about how climate modulates the relationship between plant diversity and soil organic carbon and the mechanisms involved. Yet, this knowledge is of crucial importance in times of climate change and biodiversity loss. Here, we show that plant diversity is positively correlated with soil carbon content and soil carbon-to-nitrogen ratio across 84 grasslands on six continents that span wide climate gradients. The relationships between plant diversity and soil carbon as well as plant diversity and soil organic matter quality (carbon-to-nitrogen ratio) are particularly strong in warm and arid climates. While plant biomass is positively correlated with soil carbon, plant biomass is not significantly correlated with plant diversity. Our results indicate that plant diversity influences soil carbon storage not via the quantity of organic matter (plant biomass) inputs to soil, but through the quality of organic matter. The study implies that ecosystem management that restores plant diversity likely enhances soil carbon sequestration, particularly in warm and arid climates., (© 2023. Springer Nature Limited.)
- Published
- 2023
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19. Multidimensional responses of grassland stability to eutrophication.
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Chen Q, Wang S, Borer ET, Bakker JD, Seabloom EW, Harpole WS, Eisenhauer N, Lekberg Y, Buckley YM, Catford JA, Roscher C, Donohue I, Power SA, Daleo P, Ebeling A, Knops JMH, Martina JP, Eskelinen A, Morgan JW, Risch AC, Caldeira MC, Bugalho MN, Virtanen R, Barrio IC, Niu Y, Jentsch A, Stevens CJ, Gruner DS, MacDougall AS, Alberti J, and Hautier Y
- Subjects
- Biomass, Eutrophication, Seasons, Ecosystem, Grassland, Biodiversity
- Abstract
Eutrophication usually impacts grassland biodiversity, community composition, and biomass production, but its impact on the stability of these community aspects is unclear. One challenge is that stability has many facets that can be tightly correlated (low dimensionality) or highly disparate (high dimensionality). Using standardized experiments in 55 grassland sites from a globally distributed experiment (NutNet), we quantify the effects of nutrient addition on five facets of stability (temporal invariability, resistance during dry and wet growing seasons, recovery after dry and wet growing seasons), measured on three community aspects (aboveground biomass, community composition, and species richness). Nutrient addition reduces the temporal invariability and resistance of species richness and community composition during dry and wet growing seasons, but does not affect those of biomass. Different stability measures are largely uncorrelated under both ambient and eutrophic conditions, indicating consistently high dimensionality. Harnessing the dimensionality of ecological stability provides insights for predicting grassland responses to global environmental change., (© 2023. Springer Nature Limited.)
- Published
- 2023
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20. Linking plant diversity-productivity relationships to plant functional traits of dominant species and changes in soil properties in 15-year-old experimental grasslands.
- Author
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Dietrich P, Eisenhauer N, and Roscher C
- Abstract
Positive plant diversity-productivity relationships are known to be driven by complementary resource use via differences in plant functional traits. Moreover, soil properties related to nutrient availability were shown to change with plant diversity over time; however, it is not well-understood whether and how such plant diversity-dependent soil changes and associated changes in functional traits contribute to positive diversity-productivity relationships in the long run. To test this, we investigated plant communities of different species richness (1, 2, 6, and 9 species) in a 15-year-old grassland biodiversity experiment. We determined community biomass production and biodiversity effects (net biodiversity [NEs], complementarity [CEs], and selection effects [SEs]), as well as community means of plant functional traits and soil properties. First, we tested how these variables changed along the plant diversity gradient and were related to each other. Then, we tested for direct and indirect effects of plant and soil variables influencing community biomass production and biodiversity effects. Community biomass production, NEs, CEs, SEs, plant height, root length density (RLD), and all soil property variables changed with plant diversity and the presence of the dominant grass species Arrhenatherum elatius (increase except for soil pH, which decreased). Plant height and RLD for plant functional traits, and soil pH and organic carbon concentration for soil properties, were the variables with the strongest influence on biomass production and biodiversity effects. Our results suggest that plant species richness and the presence of the dominant species, A. elatius , cause soil organic carbon to increase and soil pH to decrease over time, which increases nutrient availability favoring species with tall growth and dense root systems, resulting in higher biomass production in species-rich communities. Here, we present an additional process that contributes to the strengthening positive diversity-productivity relationship, which may play a role alongside the widespread plant functional trait-based explanation., Competing Interests: The authors declare no conflict of interest., (© 2023 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)
- Published
- 2023
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21. Reply to: Plant traits alone are good predictors of ecosystem properties when used carefully.
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van der Plas F, Schröder-Georgi T, Weigelt A, Barry K, Meyer S, Alzate A, Barnard RL, Buchmann N, de Kroon H, Ebeling A, Eisenhauer N, Engels C, Fischer M, Gleixner G, Hildebrandt A, Koller-France E, Leimer S, Milcu A, Mommer L, Niklaus PA, Oelmann Y, Roscher C, Scherber C, Scherer-Lorenzen M, Scheu S, Schmid B, Schulze ED, Temperton V, Tscharntke T, Voigt W, Weisser W, Wilcke W, and Wirth C
- Subjects
- Plant Leaves, Ecosystem, Plants
- Published
- 2023
- Full Text
- View/download PDF
22. Biodiversity-stability relationships strengthen over time in a long-term grassland experiment.
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Wagg C, Roscher C, Weigelt A, Vogel A, Ebeling A, de Luca E, Roeder A, Kleinspehn C, Temperton VM, Meyer ST, Scherer-Lorenzen M, Buchmann N, Fischer M, Weisser WW, Eisenhauer N, and Schmid B
- Subjects
- Biodiversity, Plants, Biomass, Ecosystem, Grassland
- Abstract
Numerous studies have demonstrated that biodiversity drives ecosystem functioning, yet how biodiversity loss alters ecosystems functioning and stability in the long-term lacks experimental evidence. We report temporal effects of species richness on community productivity, stability, species asynchrony, and complementarity, and how the relationships among them change over 17 years in a grassland biodiversity experiment. Productivity declined more rapidly in less diverse communities resulting in temporally strengthening positive effects of richness on productivity, complementarity, and stability. In later years asynchrony played a more important role in increasing community stability as the negative effect of richness on population stability diminished. Only during later years did species complementarity relate to species asynchrony. These results show that species complementarity and asynchrony can take more than a decade to develop strong stabilizing effects on ecosystem functioning in diverse plant communities. Thus, the mechanisms stabilizing ecosystem functioning change with community age., (© 2022. The Author(s).)
- Published
- 2022
- Full Text
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23. Linking changes in species composition and biomass in a globally distributed grassland experiment.
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Ladouceur E, Blowes SA, Chase JM, Clark AT, Garbowski M, Alberti J, Arnillas CA, Bakker JD, Barrio IC, Bharath S, Borer ET, Brudvig LA, Cadotte MW, Chen Q, Collins SL, Dickman CR, Donohue I, Du G, Ebeling A, Eisenhauer N, Fay PA, Hagenah N, Hautier Y, Jentsch A, Jónsdóttir IS, Komatsu K, MacDougall A, Martina JP, Moore JL, Morgan JW, Peri PL, Power SA, Ren Z, Risch AC, Roscher C, Schuchardt MA, Seabloom EW, Stevens CJ, Veen GFC, Virtanen R, Wardle GM, Wilfahrt PA, and Harpole WS
- Subjects
- Biomass, Biodiversity, Plants, Ecosystem, Grassland
- Abstract
Global change drivers, such as anthropogenic nutrient inputs, are increasing globally. Nutrient deposition simultaneously alters plant biodiversity, species composition and ecosystem processes like aboveground biomass production. These changes are underpinned by species extinction, colonisation and shifting relative abundance. Here, we use the Price equation to quantify and link the contributions of species that are lost, gained or that persist to change in aboveground biomass in 59 experimental grassland sites. Under ambient (control) conditions, compositional and biomass turnover was high, and losses (i.e. local extinctions) were balanced by gains (i.e. colonisation). Under fertilisation, the decline in species richness resulted from increased species loss and decreases in species gained. Biomass increase under fertilisation resulted mostly from species that persist and to a lesser extent from species gained. Drivers of ecological change can interact relatively independently with diversity, composition and ecosystem processes and functions such as aboveground biomass due to the individual contributions of species lost, gained or persisting., (© 2022 The Authors. Ecology Letters published by John Wiley & Sons Ltd. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.)
- Published
- 2022
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24. More losses than gains during one century of plant biodiversity change in Germany.
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Jandt U, Bruelheide H, Jansen F, Bonn A, Grescho V, Klenke RA, Sabatini FM, Bernhardt-Römermann M, Blüml V, Dengler J, Diekmann M, Doerfler I, Döring U, Dullinger S, Haider S, Heinken T, Horchler P, Kuhn G, Lindner M, Metze K, Müller N, Naaf T, Peppler-Lisbach C, Poschlod P, Roscher C, Rosenthal G, Rumpf SB, Schmidt W, Schrautzer J, Schwabe A, Schwartze P, Sperle T, Stanik N, Storm C, Voigt W, Wegener U, Wesche K, Wittig B, and Wulf M
- Subjects
- Germany, Species Specificity, Time Factors, Datasets as Topic, Biodiversity, Plants classification
- Abstract
Long-term analyses of biodiversity data highlight a 'biodiversity conservation paradox': biological communities show substantial species turnover over the past century
1,2 , but changes in species richness are marginal1,3-5 . Most studies, however, have focused only on the incidence of species, and have not considered changes in local abundance. Here we asked whether analysing changes in the cover of plant species could reveal previously unrecognized patterns of biodiversity change and provide insights into the underlying mechanisms. We compiled and analysed a dataset of 7,738 permanent and semi-permanent vegetation plots from Germany that were surveyed between 2 and 54 times from 1927 to 2020, in total comprising 1,794 species of vascular plants. We found that decrements in cover, averaged across all species and plots, occurred more often than increments; that the number of species that decreased in cover was higher than the number of species that increased; and that decrements were more equally distributed among losers than were gains among winners. Null model simulations confirmed that these trends do not emerge by chance, but are the consequence of species-specific negative effects of environmental changes. In the long run, these trends might result in substantial losses of species at both local and regional scales. Summarizing the changes by decade shows that the inequality in the mean change in species cover of losers and winners diverged as early as the 1960s. We conclude that changes in species cover in communities represent an important but understudied dimension of biodiversity change that should more routinely be considered in time-series analyses., (© 2022. The Author(s), under exclusive licence to Springer Nature Limited.)- Published
- 2022
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- View/download PDF
25. ReSurveyGermany: Vegetation-plot time-series over the past hundred years in Germany.
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Jandt U, Bruelheide H, Berg C, Bernhardt-Römermann M, Blüml V, Bode F, Dengler J, Diekmann M, Dierschke H, Doerfler I, Döring U, Dullinger S, Härdtle W, Haider S, Heinken T, Horchler P, Jansen F, Kudernatsch T, Kuhn G, Lindner M, Matesanz S, Metze K, Meyer S, Müller F, Müller N, Naaf T, Peppler-Lisbach C, Poschlod P, Roscher C, Rosenthal G, Rumpf SB, Schmidt W, Schrautzer J, Schwabe A, Schwartze P, Sperle T, Stanik N, Stroh HG, Storm C, Voigt W, von Heßberg A, von Oheimb G, Wagner ER, Wegener U, Wesche K, Wittig B, and Wulf M
- Subjects
- Germany, Plants, Biodiversity, Ecosystem
- Abstract
Vegetation-plot resurvey data are a main source of information on terrestrial biodiversity change, with records reaching back more than one century. Although more and more data from re-sampled plots have been published, there is not yet a comprehensive open-access dataset available for analysis. Here, we compiled and harmonised vegetation-plot resurvey data from Germany covering almost 100 years. We show the distribution of the plot data in space, time and across habitat types of the European Nature Information System (EUNIS). In addition, we include metadata on geographic location, plot size and vegetation structure. The data allow temporal biodiversity change to be assessed at the community scale, reaching back further into the past than most comparable data yet available. They also enable tracking changes in the incidence and distribution of individual species across Germany. In summary, the data come at a level of detail that holds promise for broadening our understanding of the mechanisms and drivers behind plant diversity change over the last century., (© 2022. The Author(s).)
- Published
- 2022
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26. Eco-evolutionary dynamics modulate plant responses to global change depending on plant diversity and species identity.
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Dietrich P, Schumacher J, Eisenhauer N, and Roscher C
- Subjects
- Biodiversity, Nitrogen metabolism, Soil, Ecosystem, Plants metabolism
- Abstract
Global change has dramatic impacts on grassland diversity. However, little is known about how fast species can adapt to diversity loss and how this affects their responses to global change. Here, we performed a common garden experiment testing whether plant responses to global change are influenced by their selection history and the conditioning history of soil at different plant diversity levels. Using seeds of four grass species and soil samples from a 14-year-old biodiversity experiment, we grew the offspring of the plants either in their own soil or in soil of a different community, and exposed them either to drought, increased nitrogen input, or a combination of both. Under nitrogen addition, offspring of plants selected at high diversity produced more biomass than those selected at low diversity, while drought neutralized differences in biomass production. Moreover, under the influence of global change drivers, soil history, and to a lesser extent plant history, had species-specific effects on trait expression. Our results show that plant diversity modulates plant-soil interactions and growth strategies of plants, which in turn affects plant eco-evolutionary pathways. How this change affects species' response to global change and whether this can cause a feedback loop should be investigated in more detail in future studies., Competing Interests: PD, JS, NE, CR No competing interests declared, (© 2022, Dietrich et al.)
- Published
- 2022
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27. Preventing Acute Kidney Injury and Hypotension After Elective Total Joint Arthroplasty Is Possible: An Update to an Established Multidisciplinary Protocol.
- Author
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Malige A, Carmona A, Roscher C, Herman D, Filipkowski A, Rowbotham J, Sgro J, Gould W, DeLong W, and Gayner R
- Subjects
- Humans, Length of Stay, Postoperative Complications epidemiology, Postoperative Complications etiology, Postoperative Complications prevention & control, Retrospective Studies, Risk Factors, Acute Kidney Injury epidemiology, Acute Kidney Injury etiology, Acute Kidney Injury prevention & control, Arthroplasty, Replacement, Hip adverse effects, Arthroplasty, Replacement, Knee adverse effects, Hypotension epidemiology, Hypotension etiology, Hypotension prevention & control
- Abstract
Introduction: Based on preoperative and perioperative risk factors that have been found to correlate with the development of acute kidney injury (AKI), our institution developed a protocol aimed at managing and improving outcomes in all elective THA and TKA patients. This article highlights the continued success and growth of our protocol aimed at decreasing AKI and hypotension in elective total joint arthroplasty patients., Method: A multidisciplinary team comprising orthopaedic surgeons, nephrologists, anesthesiologists, cardiologists, and internal medicine hospitalists created a comprehensive protocol aimed at decreasing complications after elective joint arthroplasty and improving clinical outcomes across multiple hospitals. Patient demographics, hospital length of stay, readmission rates, mortality, and postoperative AKI and hypotension incidences were recorded and compared between preprotocol phase I (initial protocol implementation) and phase II (protocol expansion across 10 hospitals) patient cohorts., Results: Overall, 3,222 patients over 56 months and 10 hospitals were included. Our phase II AKI rate (0.6%) was significantly lower than our preprotocol rate (6.2%, P < 0.01) and statistically similar to our phase I rate (1.2%, P = 0.61). Our hypotension rate in phase II (6.8%) was significantly lower than our preprotocol rate (12.7%, P < 0.01) but statistically similar to our phase I rate (5.9%, P = 0.40). Furthermore, a significant decrease was observed in hospital length of stay (P < 0.01) over time, but no difference was observed in readmission (P = 0.59) and mortality rates (P = 1.00) over time., Discussion: This protocol-driven interventional study provides a detailed and successful multidisciplinary method to manage and decrease rates of AKI and hypotension in a large patient cohort across multiple hospital centers., (Copyright © 2021 by the American Academy of Orthopaedic Surgeons.)
- Published
- 2021
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28. Soil properties as key predictors of global grassland production: Have we overlooked micronutrients?
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Radujković D, Verbruggen E, Seabloom EW, Bahn M, Biederman LA, Borer ET, Boughton EH, Catford JA, Campioli M, Donohue I, Ebeling A, Eskelinen A, Fay PA, Hansart A, Knops JMH, MacDougall AS, Ohlert T, Olde Venterink H, Raynaud X, Risch AC, Roscher C, Schütz M, Silveira ML, Stevens CJ, Van Sundert K, Virtanen R, Wardle GM, Wragg PD, and Vicca S
- Subjects
- Biomass, Carbon, Ecosystem, Micronutrients, Nitrogen analysis, Grassland, Soil
- Abstract
Fertilisation experiments have demonstrated that nutrient availability is a key determinant of biomass production and carbon sequestration in grasslands. However, the influence of nutrients in explaining spatial variation in grassland biomass production has rarely been assessed. Using a global dataset comprising 72 sites on six continents, we investigated which of 16 soil factors that shape nutrient availability associate most strongly with variation in grassland aboveground biomass. Climate and N deposition were also considered. Based on theory-driven structural equation modelling, we found that soil micronutrients (particularly Zn and Fe) were important predictors of biomass and, together with soil physicochemical properties and C:N, they explained more unique variation (32%) than climate and N deposition (24%). However, the association between micronutrients and biomass was absent in grasslands limited by NP. These results highlight soil properties as key predictors of global grassland biomass production and point to serial co-limitation by NP and micronutrients., (© 2021 John Wiley & Sons Ltd.)
- Published
- 2021
- Full Text
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29. Phenotypic plasticity masks range-wide genetic differentiation for vegetative but not reproductive traits in a short-lived plant.
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Villellas J, Ehrlén J, Crone EE, Csergő AM, Garcia MB, Laine AL, Roach DA, Salguero-Gómez R, Wardle GM, Childs DZ, Elderd BD, Finn A, Munné-Bosch S, Bachelot B, Bódis J, Bucharova A, Caruso CM, Catford JA, Coghill M, Compagnoni A, Duncan RP, Dwyer JM, Ferguson A, Fraser LH, Griffoul E, Groenteman R, Hamre LN, Helm A, Kelly R, Laanisto L, Lonati M, Münzbergová Z, Nuche P, Olsen SL, Oprea A, Pärtel M, Petry WK, Ramula S, Rasmussen PU, Enri SR, Roeder A, Roscher C, Schultz C, Skarpaas O, Smith AL, Tack AJM, Töpper JP, Vesk PA, Vose GE, Wandrag E, Wingler A, and Buckley YM
- Subjects
- Adaptation, Physiological, Biomass, Phenotype, Masks, Plantago
- Abstract
Genetic differentiation and phenotypic plasticity jointly shape intraspecific trait variation, but their roles differ among traits. In short-lived plants, reproductive traits may be more genetically determined due to their impact on fitness, whereas vegetative traits may show higher plasticity to buffer short-term perturbations. Combining a multi-treatment greenhouse experiment with observational field data throughout the range of a widespread short-lived herb, Plantago lanceolata, we (1) disentangled genetic and plastic responses of functional traits to a set of environmental drivers and (2) assessed how genetic differentiation and plasticity shape observational trait-environment relationships. Reproductive traits showed distinct genetic differentiation that largely determined observational patterns, but only when correcting traits for differences in biomass. Vegetative traits showed higher plasticity and opposite genetic and plastic responses, masking the genetic component underlying field-observed trait variation. Our study suggests that genetic differentiation may be inferred from observational data only for the traits most closely related to fitness., (© 2021 The Authors. Ecology Letters published by John Wiley & Sons Ltd.)
- Published
- 2021
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30. Effects of plant species diversity on nematode community composition and diversity in a long-term biodiversity experiment.
- Author
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Dietrich P, Cesarz S, Liu T, Roscher C, and Eisenhauer N
- Subjects
- Animals, Biodiversity, Biomass, Carbon, Plants, Nematoda, Soil
- Abstract
Diversity loss has been shown to change the soil community; however, little is known about long-term consequences and underlying mechanisms. Here, we investigated how nematode communities are affected by plant species richness and whether this is driven by resource quantity or quality in 15-year-old plant communities of a long-term grassland biodiversity experiment. We extracted nematodes from 93 experimental plots differing in plant species richness, and measured above- and belowground plant biomass production and soil organic carbon concentrations (C
org ) as proxies for resource quantity, as well as C/Nleaf ratio and specific root length (SRL) as proxies for resource quality. We found that nematode community composition and diversity significantly differed among plant species richness levels. This was mostly due to positive plant diversity effects on the abundance and genus richness of bacterial-feeding, omnivorous, and predatory nematodes, which benefited from higher shoot mass and soil Corg in species-rich plant communities, suggesting control via resource quantity. In contrast, plant-feeding nematodes were negatively influenced by shoot mass, probably due to higher top-down control by predators, and were positively related to SRL and C/Nleaf , indicating control via resource quality. The decrease of the grazing pressure ratio (plant feeders per root mass) with plant species richness indicated a higher accumulation of plant-feeding nematodes in species-poor plant communities. Our results, therefore, support the hypothesis that soil-borne pathogens accumulate in low-diversity communities over time, while soil mutualists (bacterial-feeding, omnivorous, predatory nematodes) increase in abundance and richness in high-diversity plant communities, which may contribute to the widely-observed positive plant diversity-productivity relationship., (© 2021. The Author(s).)- Published
- 2021
- Full Text
- View/download PDF
31. Species loss due to nutrient addition increases with spatial scale in global grasslands.
- Author
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Seabloom EW, Batzer E, Chase JM, Stanley Harpole W, Adler PB, Bagchi S, Bakker JD, Barrio IC, Biederman L, Boughton EH, Bugalho MN, Caldeira MC, Catford JA, Daleo P, Eisenhauer N, Eskelinen A, Haider S, Hallett LM, Svala Jónsdóttir I, Kimmel K, Kuhlman M, MacDougall A, Molina CD, Moore JL, Morgan JW, Muthukrishnan R, Ohlert T, Risch AC, Roscher C, Schütz M, Sonnier G, Tognetti PM, Virtanen R, Wilfahrt PA, and Borer ET
- Subjects
- Ecosystem, Herbivory, Nutrients, Biodiversity, Grassland
- Abstract
The effects of altered nutrient supplies and herbivore density on species diversity vary with spatial scale, because coexistence mechanisms are scale dependent. This scale dependence may alter the shape of the species-area relationship (SAR), which can be described by changes in species richness (S) as a power function of the sample area (A): S = cA
z , where c and z are constants. We analysed the effects of experimental manipulations of nutrient supply and herbivore density on species richness across a range of scales (0.01-75 m2 ) at 30 grasslands in 10 countries. We found that nutrient addition reduced the number of species that could co-occur locally, indicated by the SAR intercepts (log c), but did not affect the SAR slopes (z). As a result, proportional species loss due to nutrient enrichment was largely unchanged across sampling scales, whereas total species loss increased over threefold across our range of sampling scales., (© 2021 John Wiley & Sons Ltd.)- Published
- 2021
- Full Text
- View/download PDF
32. Organic agricultural practice enhances arbuscular mycorrhizal symbiosis in correspondence to soil warming and altered precipitation patterns.
- Author
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Wahdan SFM, Reitz T, Heintz-Buschart A, Schädler M, Roscher C, Breitkreuz C, Schnabel B, Purahong W, and Buscot F
- Subjects
- Organic Agriculture, Plant Roots microbiology, Soil Microbiology, Symbiosis, Mycorrhizae genetics, Soil
- Abstract
Climate and agricultural practice interact to influence both crop production and soil microbes in agroecosystems. Here, we carried out a unique experiment in Central Germany to simultaneously investigate the effects of climates (ambient climate vs. future climate expected in 50-70 years), agricultural practices (conventional vs. organic farming), and their interaction on arbuscular mycorrhizal fungi (AMF) inside wheat (Triticum aestivum L.) roots. AMF communities were characterized using Illumina sequencing of 18S rRNA gene amplicons. We showed that climatic conditions and agricultural practices significantly altered total AMF community composition. Conventional farming significantly affected the AMF community and caused a decline in AMF richness. Factors shaping AMF community composition and richness at family level differed greatly among Glomeraceae, Gigasporaceae and Diversisporaceae. An interactive impact of climate and agricultural practices was detected in the community composition of Diversisporaceae. Organic farming mitigated the negative effect of future climate and promoted total AMF and Gigasporaceae richness. AMF richness was significantly linked with nutrient content of wheat grains under both agricultural practices., (© 2021 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd.)
- Published
- 2021
- Full Text
- View/download PDF
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