Phenology drives mutualistic network structure and diversity
Phenology drives mutualistic network structure and diversity
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DOI：
10.1111/j.1461-0248.2011.01726.x
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发表时间：
2012-03-01
期刊：
影响因子：
8.8
通讯作者：
Etienne, Rampal S.
中科院分区：
文献类型：
--
作者：
Encinas-Viso, Francisco;Revilla, Tomas A.;Etienne, Rampal S.
一些网络属性已被确定为互惠网络稳定性和复杂性的决定因素。然而，目前还不清楚是哪些机制导致了这些网络属性。物候似乎很重要，因为它塑造了互惠网络的拓扑结构，但它对互惠网络动态的影响几乎没有被研究过。在这里，我们用一个互惠和竞争相互作用的一般动力学模型来研究这些影响，其中相互作用的强度取决于物种之间由物候引起的时间重叠。我们发现了一种负的复杂性稳定性关系，在这种关系中，物候最大化了互惠互动，最小化了行会内的竞争互动，产生了具有中等不对称性和低弹性的特定、嵌套和连接不良的网络。此外，延长季节可以增加多样性和韧性。这突显了季节短(例如北极环境)到环境剧烈变化的真正互惠社区的脆弱性。
Several network properties have been identified as determinants of the stability and complexity of mutualistic networks. However, it is unclear which mechanisms give rise to these network properties. Phenology seems important, because it shapes the topology of mutualistic networks, but its effects on the dynamics of mutualistic networks have scarcely been studied. Here, we study these effects with a general dynamical model of mutualistic and competitive interactions where the interaction strength depends on the temporal overlap between species resulting from their phenologies. We find a negative complexitystability relationship, where phenologies maximising mutualistic interactions and minimising intraguild competitive interactions generate speciose, nested and poorly connected networks with moderate asymmetry and low resilience. Moreover, lengthening the season increases diversity and resilience. This highlights the fragility of real mutualistic communities with short seasons (e.g. Arctic environments) to drastic environmental changes.