Environmental responses, not species interactions, determine synchrony of dominant species in semiarid grasslands
Environmental responses, not species interactions, determine synchrony of dominant species in semiarid grasslands
复制标题
决定半干旱草原优势物种同步性的是环境响应,而不是物种相互作用
DOI:
10.1002/ecy.1757
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发表时间:
2017
期刊:
影响因子:
4.8
通讯作者:
Adler, Peter B.
中科院分区:
文献类型:
--
作者:
Tredennick, Andrew T.;de Mazancourt, Claire;Loreau, Michel;Adler, Peter B.
Temporal asynchrony among species helps diversity to stabilize ecosystem functioning, but identifying the mechanisms that determine synchrony remains a challenge. Here, we refine and test theory showing that synchrony depends on three factors: species responses to environmental variation, interspecific interactions, and demographic stochasticity. We then conduct simulation experiments with empirical population models to quantify the relative influence of these factors on the synchrony of dominant species in five semiarid grasslands. We found that the average synchrony of per capita growth rates, which can range from 0 (perfect asynchrony) to 1 (perfect synchrony), was higher when environmental variation was present (0.62) rather than absent (0.43). Removing interspecific interactions and demographic stochasticity had small effects on synchrony. For the dominant species in these plant communities, where species interactions and demographic stochasticity have little influence, synchrony reflects the covariance in species’ responses to the environment.
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DOI:
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