Towards a mechanistic understanding of temperature and enrichment effects on species interaction strength, omnivory and food-web structure.
Towards a mechanistic understanding of temperature and enrichment effects on species interaction strength, omnivory and food-web structure.
复制标题
机械地理解温度和富集对物种相互作用强度、杂食性和食物网结构的影响。
作者：
A. Sentis;J. Hemptinne;J. Brodeur
揭示物种功能性状、相互作用强度和食物网结构之间的联系对于理解和预测快速变化世界中食物网多样性和稳定性之间的关系至关重要。然而，很少有人知道环境扰动对个体物种，营养相互作用和生态系统功能的相互影响。在这里，我们结合建模和实验室实验，调查变暖和富集对陆地三营养系统的影响。我们发现食物网结构具有高度可变性，并根据温度和富集对觅食行为和物种相互作用强度的影响在剥削竞争和杂食性之间切换。我们的模型有助于确定解释环境效应如何通过食物网级联并影响其拓扑结构的机制。我们的结论是，考虑环境因素和灵活的食物网结构是至关重要的，以提高我们的能力，预测全球变化对生态系统多样性和稳定性的影响。
Revealing the links between species functional traits, interaction strength and food-web structure is of paramount importance for understanding and predicting the relationships between food-web diversity and stability in a rapidly changing world. However, little is known about the interactive effects of environmental perturbations on individual species, trophic interactions and ecosystem functioning. Here, we combined modelling and laboratory experiments to investigate the effects of warming and enrichment on a terrestrial tritrophic system. We found that the food-web structure is highly variable and switches between exploitative competition and omnivory depending on the effects of temperature and enrichment on foraging behaviour and species interaction strength. Our model contributes to identifying the mechanisms that explain how environmental effects cascade through the food web and influence its topology. We conclude that considering environmental factors and flexible food-web structure is crucial to improve our ability to predict the impacts of global changes on ecosystem diversity and stability.
DOI：
10.1098/rstb.2012.0230
发表时间：
2012-11-05
影响因子：
6.3
作者：
Binzer, Amrei;Guill, Christian;Rall, Bjoern C.
通讯作者：
Rall, Bjoern C.