Navigating a changing world: On the significance of rewiring for
mutualistic interactions, caveats, and future directions
Abstract
Rewiring, the ability of species to establish new interactions or
reorganize existing ones, is important in the persistence of ecological
networks under human-driven environmental changes, such as habitat loss,
climate change, and species extinctions. In this paper, we (1) review
the current state of knowledge regarding studies that investigate
rewiring in mutualistic interactions; (2) identify important caveats and
research gaps; and (3) explore rewiring in the interactions between
vertebrates and fruiting plants by proposing and recommending a
comprehensive list of mechanisms that may either facilitate or limit
rewiring, that should be considered in future research. We argue that,
while rewiring is often viewed as a flexible response driven by species
abundances, co-occurrence and morphological matching, this perspective
oversimplifies the complexity of ecological and evolutionary processes
shaping the reorganization of mutualisms. For instance, intraspecific
variation in traits, fruit chemistry, competition dynamics, the role of
rare or infrequent interactions, forbidden links, and alternative modes
of seed dispersal all have the potential to determine the likelihood and
ecological consequences of rewiring, and should be considered in future
studies. Additionally, we highlight how methodological issues, such as
biased or incomplete sampling, can difficult our understanding of
rewiring potential. By integrating these overlooked elements, we propose
a more comprehensive approach for predicting how mutualistic networks
will respond to current and future environmental change. This deeper
understanding is essential for designing effective conservation
strategies with the aims at understanding the resilience and
functionality of ecosystems.