Biodiversity Corridors as Climate Adaptation Infrastructure in Fragmented Landscapes
DOI:
https://doi.org/10.5281/zenodo.22819287Keywords:
landscape connectivity, biodiversity corridors, habitat fragmentation, climate adaptation, species range shifts, corridor design, circuit theory, Yellowstone to YukonAbstract
Habitat fragmentation compounds the threat climate change poses to biodiversity by constraining the dispersal
pathways species need to track shifting climatic envelopes, and biodiversity corridors, spatially explicit linkages
between core habitat patches, have emerged as leading infrastructure for climate adaptation in fragmented
landscapes. This review synthesizes three decades of connectivity science spanning corridor design theory,
connectivity modeling methods, and empirical evidence on range-shift facilitation. We trace the evolution from
structural, least-cost-path corridor delineation toward climate-informed approaches that explicitly map projected
shifts in climatic analogs, including climate-gradient corridors and climate-velocity-based linkage models. We
synthesize evidence from circuit-theory and graph-theoretic connectivity metrics, comparing their assumptions, data
demands, and suitability for climate-adaptive planning. Meta-analytic and observational evidence indicates that
corridors reliably increase inter-patch movement and gene flow, though effect sizes vary substantially with corridor
width, matrix permeability, and target taxon vagility. We examine large-landscape initiatives, including the
Yellowstone to Yukon Conservation Initiative and Europe's Natura 2000 network, as exemplars of
multi-jurisdictional implementation, alongside their governance and monitoring challenges. Corridor effectiveness
depends jointly on structural connectivity and functional permeability for species of concern, and elevational and
latitudinal corridors show differential utility depending on local climate velocity. Persistent research gaps include
limited long-term post-implementation monitoring of climate-driven range shifts within established corridors,
insufficient integration of multi-species dispersal traits into connectivity models, and few studies evaluating corridor
performance under realistic land-use change scenarios rather than climate change alone. We conclude that
biodiversity corridors constitute a scientifically defensible but incompletely validated adaptation strategy, and that
closing the monitoring and multi-stressor evidence gaps is a priority for translating connectivity science into durable
conservation infrastructure.
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