The Experts below are selected from a list of 59508 Experts worldwide ranked by ideXlab platform
Fritz Gerhardt - One of the best experts on this subject based on the ideXlab platform.
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long term dynamics of biotic and abiotic resistance to Exotic Species invasion in restored vernal pool plant communities
Ecological Applications, 2011Co-Authors: Sharon K. Collinge, Chris Ray, Fritz GerhardtAbstract:Invasion of native ecosystems by Exotic Species can seriously threaten native biodiversity, alter ecosystem function, and inhibit conservation. Moreover, restoration of native plant communities is often impeded by competition from Exotic Species. Exotic Species invasion may be limited by unfavorable abiotic conditions and by competition with native Species, but the relative importance of biotic and abiotic factors remains controversial and may vary during the invasion process. We used a long-term experiment involving restored vernal pool plant communities to characterize the temporal dynamics of Exotic Species invasion, and to evaluate the relative support for biotic and abiotic factors affecting invasion resistance. Experimental pools (n ¼ 256) were divided among controls and several seeding treatments. In most treatments, native vernal pool Species were initially more abundant than Exotic Species, and pools that initially received more native seeds exhibited lower frequencies of Exotic Species over time. However, even densely seeded pools were eventually dominated by Exotic Species, following extreme climatic events that reduced both native and Exotic plant densities across the study site. By the sixth year of the experiment, most pools supported more Exotics than native vernal pool Species, regardless of seeding treatment or pool depth. Although deeper pools were less invaded by Exotic Species, two Exotics (Hordeum marinum and Lolium multiflorum) were able to colonize deeper pools as soon as the cover of native Species was reduced by climatic extremes. Based on an information-theoretic analysis, the best model of invasion resistance included a nonlinear effect of seeding treatment and both linear and nonlinear effects of pool depth. Pool depth received more support as a predictor of invasion resistance, but seeding intensity was also strongly supported in multivariate models of invasion, and was the best predictor of resistance to invasion by H. marinum and L. multiflorum. We conclude that extreme climatic events can facilitate Exotic Species invasions by both reducing abiotic constraints and weakening biotic resistance to invasion.
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Long‐term dynamics of biotic and abiotic resistance to Exotic Species invasion in restored vernal pool plant communities
Ecological applications : a publication of the Ecological Society of America, 2011Co-Authors: Sharon K. Collinge, Chris Ray, Fritz GerhardtAbstract:Invasion of native ecosystems by Exotic Species can seriously threaten native biodiversity, alter ecosystem function, and inhibit conservation. Moreover, restoration of native plant communities is often impeded by competition from Exotic Species. Exotic Species invasion may be limited by unfavorable abiotic conditions and by competition with native Species, but the relative importance of biotic and abiotic factors remains controversial and may vary during the invasion process. We used a long-term experiment involving restored vernal pool plant communities to characterize the temporal dynamics of Exotic Species invasion, and to evaluate the relative support for biotic and abiotic factors affecting invasion resistance. Experimental pools (n ¼ 256) were divided among controls and several seeding treatments. In most treatments, native vernal pool Species were initially more abundant than Exotic Species, and pools that initially received more native seeds exhibited lower frequencies of Exotic Species over time. However, even densely seeded pools were eventually dominated by Exotic Species, following extreme climatic events that reduced both native and Exotic plant densities across the study site. By the sixth year of the experiment, most pools supported more Exotics than native vernal pool Species, regardless of seeding treatment or pool depth. Although deeper pools were less invaded by Exotic Species, two Exotics (Hordeum marinum and Lolium multiflorum) were able to colonize deeper pools as soon as the cover of native Species was reduced by climatic extremes. Based on an information-theoretic analysis, the best model of invasion resistance included a nonlinear effect of seeding treatment and both linear and nonlinear effects of pool depth. Pool depth received more support as a predictor of invasion resistance, but seeding intensity was also strongly supported in multivariate models of invasion, and was the best predictor of resistance to invasion by H. marinum and L. multiflorum. We conclude that extreme climatic events can facilitate Exotic Species invasions by both reducing abiotic constraints and weakening biotic resistance to invasion.
Sharon K. Collinge - One of the best experts on this subject based on the ideXlab platform.
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long term dynamics of biotic and abiotic resistance to Exotic Species invasion in restored vernal pool plant communities
Ecological Applications, 2011Co-Authors: Sharon K. Collinge, Chris Ray, Fritz GerhardtAbstract:Invasion of native ecosystems by Exotic Species can seriously threaten native biodiversity, alter ecosystem function, and inhibit conservation. Moreover, restoration of native plant communities is often impeded by competition from Exotic Species. Exotic Species invasion may be limited by unfavorable abiotic conditions and by competition with native Species, but the relative importance of biotic and abiotic factors remains controversial and may vary during the invasion process. We used a long-term experiment involving restored vernal pool plant communities to characterize the temporal dynamics of Exotic Species invasion, and to evaluate the relative support for biotic and abiotic factors affecting invasion resistance. Experimental pools (n ¼ 256) were divided among controls and several seeding treatments. In most treatments, native vernal pool Species were initially more abundant than Exotic Species, and pools that initially received more native seeds exhibited lower frequencies of Exotic Species over time. However, even densely seeded pools were eventually dominated by Exotic Species, following extreme climatic events that reduced both native and Exotic plant densities across the study site. By the sixth year of the experiment, most pools supported more Exotics than native vernal pool Species, regardless of seeding treatment or pool depth. Although deeper pools were less invaded by Exotic Species, two Exotics (Hordeum marinum and Lolium multiflorum) were able to colonize deeper pools as soon as the cover of native Species was reduced by climatic extremes. Based on an information-theoretic analysis, the best model of invasion resistance included a nonlinear effect of seeding treatment and both linear and nonlinear effects of pool depth. Pool depth received more support as a predictor of invasion resistance, but seeding intensity was also strongly supported in multivariate models of invasion, and was the best predictor of resistance to invasion by H. marinum and L. multiflorum. We conclude that extreme climatic events can facilitate Exotic Species invasions by both reducing abiotic constraints and weakening biotic resistance to invasion.
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Long‐term dynamics of biotic and abiotic resistance to Exotic Species invasion in restored vernal pool plant communities
Ecological applications : a publication of the Ecological Society of America, 2011Co-Authors: Sharon K. Collinge, Chris Ray, Fritz GerhardtAbstract:Invasion of native ecosystems by Exotic Species can seriously threaten native biodiversity, alter ecosystem function, and inhibit conservation. Moreover, restoration of native plant communities is often impeded by competition from Exotic Species. Exotic Species invasion may be limited by unfavorable abiotic conditions and by competition with native Species, but the relative importance of biotic and abiotic factors remains controversial and may vary during the invasion process. We used a long-term experiment involving restored vernal pool plant communities to characterize the temporal dynamics of Exotic Species invasion, and to evaluate the relative support for biotic and abiotic factors affecting invasion resistance. Experimental pools (n ¼ 256) were divided among controls and several seeding treatments. In most treatments, native vernal pool Species were initially more abundant than Exotic Species, and pools that initially received more native seeds exhibited lower frequencies of Exotic Species over time. However, even densely seeded pools were eventually dominated by Exotic Species, following extreme climatic events that reduced both native and Exotic plant densities across the study site. By the sixth year of the experiment, most pools supported more Exotics than native vernal pool Species, regardless of seeding treatment or pool depth. Although deeper pools were less invaded by Exotic Species, two Exotics (Hordeum marinum and Lolium multiflorum) were able to colonize deeper pools as soon as the cover of native Species was reduced by climatic extremes. Based on an information-theoretic analysis, the best model of invasion resistance included a nonlinear effect of seeding treatment and both linear and nonlinear effects of pool depth. Pool depth received more support as a predictor of invasion resistance, but seeding intensity was also strongly supported in multivariate models of invasion, and was the best predictor of resistance to invasion by H. marinum and L. multiflorum. We conclude that extreme climatic events can facilitate Exotic Species invasions by both reducing abiotic constraints and weakening biotic resistance to invasion.
Guo Chuan - One of the best experts on this subject based on the ideXlab platform.
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Exotic Species Invasion and Ecological Safety
Journal of Nanjing Forestry University, 2003Co-Authors: Guo ChuanAbstract:At present,biodiversity of the world has been menaced.Biological invasion has been one of the factors threatening biodiversity.In the field of the international ecology,ecological invasion of Exotic Species has become a new hot issue. In recent years,Exotic Species invasion has done harm more and more seriously to China's biodiversity,and it has threatened China's ecological safety.Some concepts related to biological invasion are introduced.Invasive ways of Exotic Species,the serious impacts of invasive Species on ecological environment,biodiversity (including Species and genetic diversity),economy and society are reviewed.In order to prevent and control biological invasion and to guarantee China's ecological safety,it is necessary,based on the actual situation of Exotic Species invasion in China,to focus on the improvement of the state capacity,research capacity and management capacity to deal with biological invasion.
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Take precaution against the risk of Exotic Species invasion and safeguard the safety of ecosystem
Environmental Monitoring in China, 2003Co-Authors: Guo ChuanAbstract:In the wake of the increasingly expansion of international trade and exchange, Exotic Species invasion rate has been greatly increasing in addition, the threat of Exotic Species is gradually deepening in some areas of our country, the Exotic Species invasion has resulted in grave economic losses and ecosystem obstruction. Therefore, Exotic Species invasion has been the one important factor of threats to our ecosystem safety, the prevention and control of Exotic Species has been to priority issue to be addressed. This article based on some conclusions of Exotic Species invasion survey of Jilin province, elaborates the characteristic of Exotic Species invasion and corresponding measurements.
Chris Ray - One of the best experts on this subject based on the ideXlab platform.
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long term dynamics of biotic and abiotic resistance to Exotic Species invasion in restored vernal pool plant communities
Ecological Applications, 2011Co-Authors: Sharon K. Collinge, Chris Ray, Fritz GerhardtAbstract:Invasion of native ecosystems by Exotic Species can seriously threaten native biodiversity, alter ecosystem function, and inhibit conservation. Moreover, restoration of native plant communities is often impeded by competition from Exotic Species. Exotic Species invasion may be limited by unfavorable abiotic conditions and by competition with native Species, but the relative importance of biotic and abiotic factors remains controversial and may vary during the invasion process. We used a long-term experiment involving restored vernal pool plant communities to characterize the temporal dynamics of Exotic Species invasion, and to evaluate the relative support for biotic and abiotic factors affecting invasion resistance. Experimental pools (n ¼ 256) were divided among controls and several seeding treatments. In most treatments, native vernal pool Species were initially more abundant than Exotic Species, and pools that initially received more native seeds exhibited lower frequencies of Exotic Species over time. However, even densely seeded pools were eventually dominated by Exotic Species, following extreme climatic events that reduced both native and Exotic plant densities across the study site. By the sixth year of the experiment, most pools supported more Exotics than native vernal pool Species, regardless of seeding treatment or pool depth. Although deeper pools were less invaded by Exotic Species, two Exotics (Hordeum marinum and Lolium multiflorum) were able to colonize deeper pools as soon as the cover of native Species was reduced by climatic extremes. Based on an information-theoretic analysis, the best model of invasion resistance included a nonlinear effect of seeding treatment and both linear and nonlinear effects of pool depth. Pool depth received more support as a predictor of invasion resistance, but seeding intensity was also strongly supported in multivariate models of invasion, and was the best predictor of resistance to invasion by H. marinum and L. multiflorum. We conclude that extreme climatic events can facilitate Exotic Species invasions by both reducing abiotic constraints and weakening biotic resistance to invasion.
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Long‐term dynamics of biotic and abiotic resistance to Exotic Species invasion in restored vernal pool plant communities
Ecological applications : a publication of the Ecological Society of America, 2011Co-Authors: Sharon K. Collinge, Chris Ray, Fritz GerhardtAbstract:Invasion of native ecosystems by Exotic Species can seriously threaten native biodiversity, alter ecosystem function, and inhibit conservation. Moreover, restoration of native plant communities is often impeded by competition from Exotic Species. Exotic Species invasion may be limited by unfavorable abiotic conditions and by competition with native Species, but the relative importance of biotic and abiotic factors remains controversial and may vary during the invasion process. We used a long-term experiment involving restored vernal pool plant communities to characterize the temporal dynamics of Exotic Species invasion, and to evaluate the relative support for biotic and abiotic factors affecting invasion resistance. Experimental pools (n ¼ 256) were divided among controls and several seeding treatments. In most treatments, native vernal pool Species were initially more abundant than Exotic Species, and pools that initially received more native seeds exhibited lower frequencies of Exotic Species over time. However, even densely seeded pools were eventually dominated by Exotic Species, following extreme climatic events that reduced both native and Exotic plant densities across the study site. By the sixth year of the experiment, most pools supported more Exotics than native vernal pool Species, regardless of seeding treatment or pool depth. Although deeper pools were less invaded by Exotic Species, two Exotics (Hordeum marinum and Lolium multiflorum) were able to colonize deeper pools as soon as the cover of native Species was reduced by climatic extremes. Based on an information-theoretic analysis, the best model of invasion resistance included a nonlinear effect of seeding treatment and both linear and nonlinear effects of pool depth. Pool depth received more support as a predictor of invasion resistance, but seeding intensity was also strongly supported in multivariate models of invasion, and was the best predictor of resistance to invasion by H. marinum and L. multiflorum. We conclude that extreme climatic events can facilitate Exotic Species invasions by both reducing abiotic constraints and weakening biotic resistance to invasion.
Esther M. Alsum - One of the best experts on this subject based on the ideXlab platform.
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Examining native and Exotic Species diversity in European riparian forests
Biological Conservation, 2007Co-Authors: Annik Schnitzler, Brack W. Hale, Esther M. AlsumAbstract:This study performs a meta-analysis of existing studies of European riparian forests to investigate which Exotic Species have successfully established in intact riparian forests and which characteristics of these forests correspond with successful establishment. We used analysis of covariance models to investigate the relationship between community Species richness, percent Exotic Species, and several environmental variables. We found a total richness of 1380 Species, of which 45 (3.3%) were Exotic. Species-rich communities generally had the higher percentage of Exotics, but were not significantly related to latitude or environmental variables. Exotics, in contrast, were at generally higher levels at lower latitudes and were more abundant in large river plains and communities with intermediate levels of disturbance. These results suggest that future climate change and human actions that mimic intermediate levels of disturbance may further enhance the spread of Exotic Species.
