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- W1984536698 abstract "The robustness of ecosystems to species losses is a central question in ecology, given the current pace of extinctions and the many species threatened by human impacts, including habitat destruction and climate change. Robustness from the perspective of secondary extinctions has been addressed in the context of food webs to consider the complex network of species interactions that underlie responses to perturbations. In-silico removal experiments have examined the structural properties of food webs that enhance or hamper the robustness of ecosystems to species losses, with a focus on the role of hubs, the most connected species. Here we take a different approach and focus on the role of the connections themselves. We show that trophic links can be divided into functional and redundant based on their contribution to robustness. The analysis of empirical webs shows that hubs are not necessarily the most important species as they may hold many redundant links. Furthermore, the fraction of functional connections is high and constant across systems regardless of size and interconnectedness. The main consequence of this scaling pattern is that ecosystem robustness can be considerably reduced by species extinctions even when these do not result in any secondary extinctions. This introduces the possibility of tipping points in the collapse of ecosystems." @default.
- W1984536698 created "2016-06-24" @default.
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- W1984536698 date "2009-06-27" @default.
- W1984536698 modified "2023-10-18" @default.
- W1984536698 title "Functional links and robustness in food webs" @default.
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- W1984536698 doi "https://doi.org/10.1098/rstb.2008.0214" @default.
- W1984536698 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2685419" @default.
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