The hidden role of multi-trophic interactions in driving diversity-productivity relationships
The hidden role of multi-trophic interactions in driving diversity-productivity relationships
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DOI：
10.1111/ele.13935
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发表时间：
2021-11-30
期刊：
影响因子：
8.8
通讯作者：
Brose, Ulrich
中科院分区：
文献类型：
--
作者：
Albert, Georg;Gauzens, Benoit;Brose, Ulrich
生产者物种的资源利用互补性经常被用来解释总体上正的多样性-生产力关系。此外，跨营养水平连接过程的多营养相互作用作为可能的关键驱动因素受到越来越多的关注。鉴于两者都是自然生态系统的组成部分，它们的相互作用应该是明显的，但仍然是隐藏的。我们通过在复杂食物网中嵌套的生产者社区的模拟实验中分析多样性-生产力关系，操纵资源利用互补性和多营养动物丰富度来解决这个问题。我们发现，这两种机制相互作用，创造了不同的互补生产者物种群落。这就形成了多样性与生产力的关系，使得它们的共同贡献通常超过了各自的影响。具体而言，尽管资源利用重叠，但动物丰富的生态系统中的多营养相互作用通过防止竞争性排斥来促进生产者共存，从而增加了实现的互补性。在建立生物多样性-生产力关系方面，食物网的相互依存和生产者的互补性突出了采用多营养视角看待生物多样性-生态系统功能关系的重要性。
Resource-use complementarity of producer species is often invoked to explain the generally positive diversity-productivity relationships. Additionally, multi-trophic interactions that link processes across trophic levels have received increasing attention as a possible key driver. Given that both are integral to natural ecosystems, their interactive effect should be evident but has remained hidden. We address this issue by analysing diversity-productivity relationships in a simulation experiment of producer communities nested within complex food-webs, manipulating resource-use complementarity and multi-trophic animal richness. We show that these two mechanisms interactively create diverse communities of complementary producer species. This shapes diversity-productivity relationships such that their joint contribution generally exceeds their individual effects. Specifically, multi-trophic interactions in animal-rich ecosystems facilitate producer coexistence by preventing competitive exclusion despite overlaps in resource-use, which increases the realised complementarity. The interdependence of food-webs and producer complementarity in creating biodiversity-productivity relationships highlights the importance to adopt a multi-trophic perspective on biodiversity-ecosystem functioning relationships.