The effects of habitat loss and fragmentation on plant functional traits and functional diversity: what do we know so far?
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Habitat loss and fragmentation result in significant landscape changes that ultimately affect plant diversity and add uncertainty to how natural areas will respond to future global change. This uncertainty is important given that the loss of biodiversity often includes losing key ecosystem functions. Few studies have explored the effects of landscape changes on plant functional diversity and evidence so far has shown far more pervasive effects than previously reported by species richness and composition studies. Here we present a review on the impact of habitat loss and fragmentation on (1) individual functional traits—related to persistence, dispersal and establishment—and (2) functional diversity. We also discuss current knowledge gaps and propose ways forward. From the literature review we found that studies have largely focused on dispersal traits, strongly impacted by habitat loss and fragmentation, while traits related to persistence were the least studied. Furthermore, most studies did not distinguish habitat loss from spatial fragmentation and were conducted at the plot or fragment-level, which taken together limits the ability to generalize the scale-dependency of landscape changes on plant functional diversity. For future work, we recommend (1) clearly distinguishing the effects of habitat loss from those of fragmentation, and (2) recognizing the scale-dependency of predicted responses when functional diversity varies in time and space. We conclude that a clear understanding of the effects of habitat loss and fragmentation on functional diversity will improve predictions of the resiliency and resistance of plant communities to varying scales of disturbance.
KeywordsAlpha diversity Beta diversity Functional traits Functional homogenization Plant communities
We would like to thank Nathan Swenson and Ellen Damschen for helpful feedback on the manuscript. JZ and NGB were supported by the National Socio-Environmental Synthesis Center under the US National Science Foundation Grant DBI-1052875. CF benefited from an “Investissements d’Avenir” grant managed by Agence Nationale de la Recherche (CEBA, ref. ANR-10-LABX-25-01). LY acknowledges support from US National Science Foundation Grant OCE-1661683.
Author contribution statement
JZ conceived the idea. JZ and NGB wrote the manuscript. All authors provided feedback and contributed to writing. The co-author list was ordered to reflect primary contributions from JZ and NGB and by the rest of the co-authors in sequence of their contributions to the manuscript.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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