Landscape configuration and community structure jointlydetermine the persistence of mutualists under habitat loss

Abstract

Habitat loss poses a major threat to biodiversity. Its effects on ecological communities depend on the complex interplay between the landscape configuration -- the patterns of connections between habitat patches, community structure -- the patterns of interactions between species, and habitat loss patterns. Despite their individual importance, their joint effect on species persistence remains poorly understood. We explore how these three factors influence the persistence of empirical mutualistic communities. By employing spatially explicit metacommunity models, we find that landscapes with a heterogeneous distribution of connections between habitat patches exhibit high persistence under spatially-uncorrelated habitat loss but are highly vulnerable to spatially-correlated loss, where adjacent habitat patches are destroyed sequentially. Homogeneous landscapes with regularly arranged patches have lower persistence than heterogeneous landscapes but are more resilient to correlated habitat loss. The metacommunity nested structure of species interactions enhances persistence, with varying magnitude depending on landscape configuration and the patterns of habitat loss. These results can guide conservation strategies by identifying landscape and community features that promote species persistence.