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Individual species provide multifaceted contributions to the stability of ecosystems
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Journal Article
Individual species provide multifaceted contributions to the stability of ecosystems
2020
Overview
Exploration of the relationship between species diversity and ecological stability has occupied a prominent place in ecological research for decades. Yet, a key component of this puzzle—the contributions of individual species to the overall stability of ecosystems—remains largely unknown. Here, we show that individual species simultaneously stabilize and destabilize ecosystems along different dimensions of stability, and also that their contributions to functional (biomass) and compositional stability are largely independent. By simulating experimentally the extinction of three consumer species (the limpet
Patella
, the periwinkle
Littorina
and the topshell
Gibbula
) from a coastal rocky shore, we found that the capacity to predict the combined contribution of species to stability from the sum of their individual contributions varied among stability dimensions. This implies that the nature of the diversity–stability relationship depends upon the dimension of stability under consideration, and may be additive, synergistic or antagonistic. We conclude that, although the profoundly multifaceted and context-dependent consequences of species loss pose a significant challenge, the predictability of cumulative species contributions to some dimensions of stability provide a way forward for ecologists trying to conserve ecosystems and manage their stability under global change.
By simulating experimentally the extinction of three key grazer species from an intertidal community, the authors show that the contribution of individual species to different dimensions of ecological stability is highly context dependent, and may simultaneously be positive or negative.
Publisher
Nature Publishing Group UK,Nature Publishing Group
