Biodiversity increases multitrophic energy use efficiency, flow and storage in grasslands
Biodiversity increases multitrophic energy use efficiency, flow and storage in grasslands
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DOI：
10.1038/s41559-020-1123-8
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发表时间：
2020-02-24
影响因子：
16.8
通讯作者：
Petermann, Jana S.
中科院分区：
文献类型：
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作者：
Buzhdygan, Oksana Y.;Meyer, Sebastian T.;Petermann, Jana S.
作者将生态系统能量学的概念应用于草原生物多样性实验，表明随着植物多样性的增加，整个营养网络（包括地上和地下）的能量储存和流动变得更加有效。全球生物多样性的持续丧失引发了物种灭绝对自然生态系统功能及其为人类福祉提供的服务构成风险的问题。人们一致认为，在单一营养层次上，生物多样性维持着各种功能;然而，要了解生物多样性的全部影响，需要从整体和多营养的角度来看待。在这里，我们应用生态系统生态学的方法，量化的营养网络的结构和动态，使用生态系统能量学的数据从一个大型草原生物多样性实验。我们发现，更高的植物多样性导致更多的能量储存，更大的能量流和更高的社区能源利用效率在整个营养网络。生物多样性对能量动态的这些影响不仅限于植物，而且也表现在其他营养群体中，在类似的程度上，在生态系统的地上和地下部分，即使植物是迄今为止在系统中的主导群体。生物多样性对一个营养级的积极影响不会被对相邻营养级的消极影响所抵消。营养水平共同提高了社区的表现，表明生态系统范围内的多营养互补性，这可能是提供生态系统服务的一个重要先决条件。
Applying the concept of ecosystem energetics to a grassland biodiversity experiment, the authors show that the storage and flow of energy across the whole trophic network, both above- and belowground, becomes more efficient as plant diversity increases.The continuing loss of global biodiversity has raised questions about the risk that species extinctions pose for the functioning of natural ecosystems and the services that they provide for human wellbeing. There is consensus that, on single trophic levels, biodiversity sustains functions; however, to understand the full range of biodiversity effects, a holistic and multitrophic perspective is needed. Here, we apply methods from ecosystem ecology that quantify the structure and dynamics of the trophic network using ecosystem energetics to data from a large grassland biodiversity experiment. We show that higher plant diversity leads to more energy stored, greater energy flow and higher community-energy-use efficiency across the entire trophic network. These effects of biodiversity on energy dynamics were not restricted to only plants but were also expressed by other trophic groups and, to a similar degree, in aboveground and belowground parts of the ecosystem, even though plants are by far the dominating group in the system. The positive effects of biodiversity on one trophic level were not counteracted by the negative effects on adjacent levels. Trophic levels jointly increased the performance of the community, indicating ecosystem-wide multitrophic complementarity, which is potentially an important prerequisite for the provisioning of ecosystem services.