The Experts below are selected from a list of 218607 Experts worldwide ranked by ideXlab platform
David Fowler - One of the best experts on this subject based on the ideXlab platform.
-
Nitrogen deposition threatens Species Richness of grasslands across Europe
Environmental Pollution, 2010Co-Authors: C J Stevens, Roland Bobbink, D. Alard, A. Bleeker, Martin Diekmann, David J G Gowing, Cecilia Dupre, Edu Dorland, Cassandre Gaudnik, David FowlerAbstract:Abstract Evidence from an international survey in the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is reducing plant Species Richness in acid grasslands. Across the deposition gradient in this region (2–44 kg N ha −1 yr −1 ) Species Richness showed a curvilinear response, with greatest reductions in Species Richness when deposition increased from low levels. This has important implications for conservation policies, suggesting that to protect the most sensitive grasslands resources should be focussed where deposition is currently low. Soil pH is also an important driver of Species Richness indicating that the acidifying effect of nitrogen deposition may be contributing to Species Richness reductions. The results of this survey suggest that the impacts of nitrogen deposition can be observed over a large geographical range.
-
Nitrogen deposition threatens Species Richness of grasslands across Europe
Environmental Pollution, 2010Co-Authors: C J Stevens, Roland Bobbink, D. Alard, A. Bleeker, Martin Diekmann, David J G Gowing, Cecilia Dupre, Edu Dorland, Cassandre Gaudnik, David FowlerAbstract:Evidence from an international survey in the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is reducing plant Species Richness in acid grasslands. Across the deposition gradient in this region (2–44 kg N ha−1 yr−1) Species Richness showed a curvilinear response, with greatest reductions in Species Richness when deposition increased from low levels. This has important implications for conservation policies, suggesting that to protect the most sensitive grasslands resources should be focussed where deposition is currently low. Soil pH is also an important driver of Species Richness indicating that the acidifying effect of nitrogen deposition may be contributing to Species Richness reductions. The results of this survey suggest that the impacts of nitrogen deposition can be observed over a large geographical range. Atmospheric nitrogen deposition is reducing biodiversity in grasslands across Europe.
C J Stevens - One of the best experts on this subject based on the ideXlab platform.
-
Nitrogen deposition threatens Species Richness of grasslands across Europe
Environmental Pollution, 2010Co-Authors: C J Stevens, Roland Bobbink, D. Alard, A. Bleeker, Martin Diekmann, David J G Gowing, Cecilia Dupre, Edu Dorland, Cassandre Gaudnik, David FowlerAbstract:Abstract Evidence from an international survey in the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is reducing plant Species Richness in acid grasslands. Across the deposition gradient in this region (2–44 kg N ha −1 yr −1 ) Species Richness showed a curvilinear response, with greatest reductions in Species Richness when deposition increased from low levels. This has important implications for conservation policies, suggesting that to protect the most sensitive grasslands resources should be focussed where deposition is currently low. Soil pH is also an important driver of Species Richness indicating that the acidifying effect of nitrogen deposition may be contributing to Species Richness reductions. The results of this survey suggest that the impacts of nitrogen deposition can be observed over a large geographical range.
-
Nitrogen deposition threatens Species Richness of grasslands across Europe
Environmental Pollution, 2010Co-Authors: C J Stevens, Roland Bobbink, D. Alard, A. Bleeker, Martin Diekmann, David J G Gowing, Cecilia Dupre, Edu Dorland, Cassandre Gaudnik, David FowlerAbstract:Evidence from an international survey in the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is reducing plant Species Richness in acid grasslands. Across the deposition gradient in this region (2–44 kg N ha−1 yr−1) Species Richness showed a curvilinear response, with greatest reductions in Species Richness when deposition increased from low levels. This has important implications for conservation policies, suggesting that to protect the most sensitive grasslands resources should be focussed where deposition is currently low. Soil pH is also an important driver of Species Richness indicating that the acidifying effect of nitrogen deposition may be contributing to Species Richness reductions. The results of this survey suggest that the impacts of nitrogen deposition can be observed over a large geographical range. Atmospheric nitrogen deposition is reducing biodiversity in grasslands across Europe.
Oliver L Phillips - One of the best experts on this subject based on the ideXlab platform.
-
environmental effects on neotropical liana Species Richness
Journal of Biogeography, 2009Co-Authors: Geertje M F Van Der Heijden, Oliver L PhillipsAbstract:Aim Lianas differ physiologically from trees, and therefore their Species-Richness patterns and potential climate-change responses might also differ. However, multivariate assessments of spatial patterns in liana Species Richness and their controls are lacking. Our aim in this paper is to identify the environmental factors that best explain the variation in liana Species Richness within tropical forests. Location Lowland and montane Neotropical forests. Methods We quantified the contributions of environmental variables and liana and tree-and-shrub abundance to the Species Richness of lianas, trees and shrubs ≥ 2.5 cm in diameter using a subset of 65 standardized (0.1 ha) plots from 57 Neotropical sites from a global dataset collected by the late Alwyn Gentry. We used both regression and structural equation modelling to account for the effects of environmental variables (climate, soil and disturbance) and liana density on liana Species Richness, and we compared the Species-Richness patterns of lianas with those of trees and shrubs. Results We found that, after accounting for liana density, dry-season length was the dominant predictor of liana Species Richness. In addition, liana Species Richness was also related to stand-level wood density (a proxy for disturbance) in lowland forests, a pattern that has not hitherto been shown across such a large study region. Liana Species Richness had a weak association with soil properties, but the effect of soil may be obscured by the strong correlation between soil properties and climate. The diversity patterns of lianas and of trees and shrubs were congruent: wetter forests had a greater Species Richness of all woody plants. Main conclusions The primary association of both liana and tree-and-shrub Species Richness with water availability suggests that, if parts of the Neotropics become drier as a result of climate change, substantial declines in the Species Richness of woody plants at the stand level may be anticipated.
-
ARTICLE Environmental effects on Neotropical liana Species Richness
2009Co-Authors: Geertje M F Van Der Heijden, Oliver L PhillipsAbstract:Aim Lianas differ physiologically from trees, and therefore their Species-Richness patterns and potential climate-change responses might also differ. However, multivariate assessments of spatial patterns in liana Species Richness and their controls are lacking. Our aim in this paper is to identify the environmental factors that best explain the variation in liana Species Richness within tropical forests. Location Lowland and montane Neotropical forests. Methods We quantified the contributions of environmental variables and liana and tree-and-shrub abundance to the Species Richness of lianas, trees and shrubs ‡ 2.5 cm in diameter using a subset of 65 standardized (0.1 ha) plots from 57 Neotropical sites from a global dataset collected by the late Alwyn Gentry. We used both regression and structural equation modelling to account for the effects of environmental variables (climate, soil and disturbance) and liana density on liana Species Richness, and we compared the Species-Richness patterns of lianas with those of trees and shrubs. Results We found that, after accounting for liana density, dry-season length was the dominant predictor of liana Species Richness. In addition, liana Species Richness was also related to stand-level wood density (a proxy for disturbance) in lowland forests, a pattern that has not hitherto been shown across such a large study region. Liana Species Richness had a weak association with soil properties, but the effect of soil may be obscured by the strong correlation between soil properties and climate. The diversity patterns of lianas and of trees and shrubs were congruent: wetter forests had a greater Species Richness of all woody plants. Main conclusions The primary association of both liana and tree-and-shrub Species Richness with water availability suggests that, if parts of the Neotropics become drier as a result of climate change, substantial declines in the Species Richness of woody plants at the stand level may be anticipated.
A. Bleeker - One of the best experts on this subject based on the ideXlab platform.
-
Nitrogen deposition threatens Species Richness of grasslands across Europe
Environmental Pollution, 2010Co-Authors: C J Stevens, Roland Bobbink, D. Alard, A. Bleeker, Martin Diekmann, David J G Gowing, Cecilia Dupre, Edu Dorland, Cassandre Gaudnik, David FowlerAbstract:Abstract Evidence from an international survey in the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is reducing plant Species Richness in acid grasslands. Across the deposition gradient in this region (2–44 kg N ha −1 yr −1 ) Species Richness showed a curvilinear response, with greatest reductions in Species Richness when deposition increased from low levels. This has important implications for conservation policies, suggesting that to protect the most sensitive grasslands resources should be focussed where deposition is currently low. Soil pH is also an important driver of Species Richness indicating that the acidifying effect of nitrogen deposition may be contributing to Species Richness reductions. The results of this survey suggest that the impacts of nitrogen deposition can be observed over a large geographical range.
-
Nitrogen deposition threatens Species Richness of grasslands across Europe
Environmental Pollution, 2010Co-Authors: C J Stevens, Roland Bobbink, D. Alard, A. Bleeker, Martin Diekmann, David J G Gowing, Cecilia Dupre, Edu Dorland, Cassandre Gaudnik, David FowlerAbstract:Evidence from an international survey in the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is reducing plant Species Richness in acid grasslands. Across the deposition gradient in this region (2–44 kg N ha−1 yr−1) Species Richness showed a curvilinear response, with greatest reductions in Species Richness when deposition increased from low levels. This has important implications for conservation policies, suggesting that to protect the most sensitive grasslands resources should be focussed where deposition is currently low. Soil pH is also an important driver of Species Richness indicating that the acidifying effect of nitrogen deposition may be contributing to Species Richness reductions. The results of this survey suggest that the impacts of nitrogen deposition can be observed over a large geographical range. Atmospheric nitrogen deposition is reducing biodiversity in grasslands across Europe.
Martin Diekmann - One of the best experts on this subject based on the ideXlab platform.
-
Nitrogen deposition threatens Species Richness of grasslands across Europe
Environmental Pollution, 2010Co-Authors: C J Stevens, Roland Bobbink, D. Alard, A. Bleeker, Martin Diekmann, David J G Gowing, Cecilia Dupre, Edu Dorland, Cassandre Gaudnik, David FowlerAbstract:Abstract Evidence from an international survey in the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is reducing plant Species Richness in acid grasslands. Across the deposition gradient in this region (2–44 kg N ha −1 yr −1 ) Species Richness showed a curvilinear response, with greatest reductions in Species Richness when deposition increased from low levels. This has important implications for conservation policies, suggesting that to protect the most sensitive grasslands resources should be focussed where deposition is currently low. Soil pH is also an important driver of Species Richness indicating that the acidifying effect of nitrogen deposition may be contributing to Species Richness reductions. The results of this survey suggest that the impacts of nitrogen deposition can be observed over a large geographical range.
-
Nitrogen deposition threatens Species Richness of grasslands across Europe
Environmental Pollution, 2010Co-Authors: C J Stevens, Roland Bobbink, D. Alard, A. Bleeker, Martin Diekmann, David J G Gowing, Cecilia Dupre, Edu Dorland, Cassandre Gaudnik, David FowlerAbstract:Evidence from an international survey in the Atlantic biogeographic region of Europe indicates that chronic nitrogen deposition is reducing plant Species Richness in acid grasslands. Across the deposition gradient in this region (2–44 kg N ha−1 yr−1) Species Richness showed a curvilinear response, with greatest reductions in Species Richness when deposition increased from low levels. This has important implications for conservation policies, suggesting that to protect the most sensitive grasslands resources should be focussed where deposition is currently low. Soil pH is also an important driver of Species Richness indicating that the acidifying effect of nitrogen deposition may be contributing to Species Richness reductions. The results of this survey suggest that the impacts of nitrogen deposition can be observed over a large geographical range. Atmospheric nitrogen deposition is reducing biodiversity in grasslands across Europe.
