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Network motifs involving both competition and facilitation predict biodiversity in alpine plant communities
Biological diversity depends on multiple, cooccurring ecological interactions. However, most studies focus on one interaction type at a time, leaving community ecologists unsure of how positive and negative associations among species combine to influence biodiversity patterns. Using surveys of plant...
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Published in: | Proceedings of the National Academy of Sciences - PNAS 2021-02, Vol.118 (6), p.1-6 |
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creator | Losapio, Gianalberto Schöb, Christian Staniczenko, Phillip P. A. Carrara, Francesco Palamara, Gian Marco De Moraes, Consuelo M. Mescher, Mark C. Brooker, Rob W. Butterfield, Bradley J. Callaway, Ragan M. Cavieresi, Lohengrin A. Kikvidzej, Zaal Lortie, Christopher J. Michalet, Richard Pugnaire, Francisco I. Bascompte, Jordi |
description | Biological diversity depends on multiple, cooccurring ecological interactions. However, most studies focus on one interaction type at a time, leaving community ecologists unsure of how positive and negative associations among species combine to influence biodiversity patterns. Using surveys of plant populations in alpine communities worldwide, we explore patterns of positive and negative associations among triads of species (modules) and their relationship to local biodiversity. Three modules, each incorporating both positive and negative associations, were overrepresented, thus acting as "network motifs." Furthermore, the overrepresentation of these network motifs is positively linked to species diversity globally. A theoretical model illustrates that these network motifs, based on competition between facilitated species or facilitation between inferior competitors, increase local persistence. Our findings suggest that the interplay of competition and facilitation is crucial for maintaining biodiversity. |
doi_str_mv | 10.1073/pnas.2005759118 |
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title | Network motifs involving both competition and facilitation predict biodiversity in alpine plant communities |
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