Experimental evidence of the importance of multitrophic structure for species persistence
Experimental evidence of the importance of multitrophic structure for species persistence
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DOI：
10.1073/pnas.2023872118
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发表时间：
2021-03-23
影响因子：
11.1
通讯作者：
Godoy, Oscar
中科院分区：
文献类型：
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作者：
Bartomeus, Ignasi;Saavedra, Serguei;Godoy, Oscar
生态理论预测，多营养网络中的物种相互作用决定了物种生存的机会。然而，这一预测缺乏实验支持，限制了我们对营养级内和营养级之间发生的物种相互作用如何同时调节生物多样性的维持的理解。在这里，我们在植物传粉者群落中整合了数学方法和详细实验，以证明在估计物种持续能力时需要共同考虑营养级内部和跨营养级的物种相互作用。在植物营养水平内，我们发现，当引入植物-传粉媒介相互作用的影响时，植物物种的持久性概率会增加。在营养水平上，我们发现，当通过实验操纵多营养结构时，植物和传粉媒介的持久性概率都表现出特殊的变化。重要的是，传统模拟无法恢复这些特殊效应。我们的工作提供了易于处理的实验和理论平台，在此平台上可以研究影响生态群落中物种持久性的多营养因素。
Ecological theory predicts that species interactions embedded in multitrophic networks shape the opportunities for species to persist. However, the lack of experimental support of this prediction has limited our understanding of how species interactions occurring within and across trophic levels simultaneously regulate the maintenance of biodiversity. Here, we integrate a mathematical approach and detailed experiments in plant-pollinator communities to demonstrate the need to jointly account for species interactions within and across trophic levels when estimating the ability of species to persist. Within the plant trophic level, we show that the persistence probability of plant species increases when introducing the effects of plant-pollinator interactions. Across trophic levels, we show that the persistence probabilities of both plants and pollinators exhibit idiosyncratic changes when experimentally manipulating the multitrophic structure. Importantly, these idiosyncratic effects are not recovered by traditional simulations. Our work provides tractable experimental and theoretical platforms upon which it is possible to investigate the multitrophic factors affecting species persistence in ecological communities.