Pushing the pace of tree species migration
Eli D Lazarus1, Brian J McGill2
1Environmental Dynamics Lab, Earth Surface Processes Group, School of Earth and Ocean Sciences, Cardiff University, Cardiff, Wales, United Kingdom.
Plos One
|August 28, 2014
Summary
Climate change forces species migration, but fragmented landscapes hinder tree species. Assisted colonization could help, but requires massive environmental intervention.
Area of Science:
- Ecology
- Climate Change Biology
- Conservation Biology
Background:
- Species historically migrated to track habitable environments, shifting geographic ranges.
- Modern species migration is challenged by anthropogenic habitat fragmentation.
- Wind-dispersed tree species possess high migration potential but face landscape barriers.
Purpose of the Study:
- To model tree species migration dynamics in fragmented landscapes.
- To evaluate the efficacy of assisted colonization for climate change adaptation.
- To assess the scale of intervention required for assisted colonization programs.
Main Methods:
- Developed a numerical model for long-distance seed dispersal and species-front migration.
- Simulated assisted colonization via tree planting in a fragmented landscape.
- Analyzed migration rates relative to climate velocity.
Main Results:
- Modeled tree species, even with long-distance dispersal, struggle to match climate velocity.
- Assisted colonization can accelerate migration rates to potentially keep pace with climate change.
- Successful assisted colonization necessitates large-scale environmental sustainability interventions.
Conclusions:
- Assisted colonization is a potential strategy for climate change adaptation in trees.
- Significant landscape-scale interventions are required for assisted colonization to be effective.
- Balancing migration support with ecological sustainability is crucial for conservation efforts.
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