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DOI | 10.1007/s12080-019-0417-4 |
Broadly inflicted stressors can cause ecosystem thinning | |
Burgess, Matthew G.1,2; Fredston-Hermann, Alexa3; Tilman, David3,4; Loreau, Michel5; Gaines, Steven D.3,6 | |
发表日期 | 2019 |
ISSN | 1874-1738 |
EISSN | 1874-1746 |
卷号 | 12期号:2页码:207-223 |
英文摘要 | Many anthropogenic stressors broadly inflict mortality or reduce fecundity, including habitat destruction, pollution, climate change, invasive species, and multispecies harvesting. Here, we show-in four analytical models of interspecies competition-that broadly inflicted stressors disproportionately cause competitive exclusions within groups of ecologically similar species. As a result, we predict that ecosystems become progressively thinner-that is, they have progressively less functional redundancy-as broadly inflicted stressors become progressively more intense. This may negatively affect the temporal stability of ecosystem functions, but it also buffers ecosystem productivity against stress by favoring species less sensitive to the stressors. Our main result follows from the weak limiting similarity principle: species with more similar ecological niches compete more strongly, and their coexistence can be upset by smaller perturbations. We show that stressors can cause indirect competitive exclusions at much lower stressor intensity than needed to directly cause species extinction, consistent with the finding of empirical studies that species interactions are often the proximal drivers of local extinctions. The excluded species are more sensitive to the stressor relative to their ecologically similar competitors. Moreover, broadly inflicted stressors may cause hydra effects-where higher stressor intensity results in higher abundance for a species with lower sensitivity to the stressor than its competitors. Correlations between stressor impacts and ecological niches reduce the potential for indirect competitive exclusions, but they consequently also reduce the buffering effect of ecosystem thinning on ecosystem productivity. Our findings suggest that ecosystems experiencing stress may continue to provision ecosystem services but lose functional redundancy and stability. |
WOS研究方向 | Environmental Sciences & Ecology |
来源期刊 | THEORETICAL ECOLOGY |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/98379 |
作者单位 | 1.Univ Colorado, Cooperat Inst Res Environm Sci, 216 UCB, Boulder, CO 80309 USA; 2.Univ Colorado, Environm Studies Program, Boulder, CO 80303 USA; 3.Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA; 4.Univ Minnesota, Dept Ecol Evolut & Behav, St Paul, MN 55108 USA; 5.CNRS, Theoret & Expt Ecol Stn, Ctr Biodivers Theory & Modelling, F-09200 Moulis, France; 6.Univ Calif Santa Barbara, Marine Sci Inst, Santa Barbara, CA 93106 USA |
推荐引用方式 GB/T 7714 | Burgess, Matthew G.,Fredston-Hermann, Alexa,Tilman, David,et al. Broadly inflicted stressors can cause ecosystem thinning[J],2019,12(2):207-223. |
APA | Burgess, Matthew G.,Fredston-Hermann, Alexa,Tilman, David,Loreau, Michel,&Gaines, Steven D..(2019).Broadly inflicted stressors can cause ecosystem thinning.THEORETICAL ECOLOGY,12(2),207-223. |
MLA | Burgess, Matthew G.,et al."Broadly inflicted stressors can cause ecosystem thinning".THEORETICAL ECOLOGY 12.2(2019):207-223. |
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