Ranking species in mutualistic networks
Virginia Dom\'inguez-Garc\'ia, Miguel A. Mu\~noz

TL;DR
This paper introduces a novel ranking method for species importance in mutualistic ecological networks, leveraging their nested structure to improve ecosystem management and biodiversity preservation strategies.
Contribution
The paper proposes a new non-linear PageRank-inspired algorithm tailored for nested bipartite networks, outperforming existing ranking methods.
Findings
The new method provides more accurate species importance rankings.
It outperforms existing schemes in predictive accuracy.
The approach has practical implications for ecosystem management.
Abstract
Understanding the architectural subtleties of ecological networks, believed to confer them enhanced stability and robustness, is a subject of outmost relevance. Mutualistic interactions have been profusely studied and their corresponding bipartite networks, such as plant-pollinator networks, have been reported to exhibit a characteristic "nested" structure. Assessing the importance of any given species in mutualistic networks is a key task when evaluating extinction risks and possible cascade effects. Inspired in a recently introduced algorithm --similar in spirit to Google's PageRank but with a built-in non-linearity-- here we propose a method which --by exploiting their nested architecture-- allows us to derive a sound ranking of species importance in mutualistic networks. This method clearly outperforms other existing ranking schemes and can become very useful for ecosystem…
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