Warming is associated with temporal decoupling of species' body size and abundance
Zhao, Q.; Wang, Y. X. G.; Xu, C.; Sugihara, G.; De Laender, F.
Show abstract
Eco-phenotypic feedback--reciprocal interactions between phenotypic traits and ecological dynamics--is increasingly recognized as a driver of biodiversity patterns, species interactions, and ecosystem functioning. Through this feedback, phenotypic traits such as body size can rapidly respond to environmental variation through plastic or evolutionary changes, altering population abundance, which in turn feeds back to shape the trait dynamics. Yet, whether the integrity of this feedback remains stable under environmental change remains unclear. Using long-term monitoring data from 101 aquatic and terrestrial ecosystems encompassing multiple generations, we provide the first synthesis showing that warming and species richness systematically weakens the eco-phenotypic feedback loop, while mean species body size strengths it. Our findings reveal that climate change can erode key trait- demography couplings and highlight the importance of integrating ecophenotypic frameworks into global change research.
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