Habitat fragmentation occurs when loss of habitat (e.g. to land use changes or human development) divides large or connected habitat areas into smaller, more isolated areas. This process is recognized as one of the most pressing conservation issues in the Southeastern U.S. Habitat loss and fragmentation reduces the amount of suitable habitat available to wildlife species, divides wildlife populations and reduces genetic diversity, and interrupts important migration patterns; and climate change is likely to disrupt habitat areas even more. Maintaining connectivity between habitats and wildlife populations will be a key management strategy for conserving biodiversity in the region into the future. Previous work by the research team [...]
Summary
Habitat fragmentation occurs when loss of habitat (e.g. to land use changes or human development) divides large or connected habitat areas into smaller, more isolated areas. This process is recognized as one of the most pressing conservation issues in the Southeastern U.S. Habitat loss and fragmentation reduces the amount of suitable habitat available to wildlife species, divides wildlife populations and reduces genetic diversity, and interrupts important migration patterns; and climate change is likely to disrupt habitat areas even more. Maintaining connectivity between habitats and wildlife populations will be a key management strategy for conserving biodiversity in the region into the future.
Previous work by the research team modeled and mapped connectivity in the Southeast for three animals that inhabit bottomland forests, and showed where key connections in the landscape lie both currently and in the future. However, the researchers observed large variation in connectivity across geographical areas, time periods, and species. These results raised new questions about which connections are most important for management actions.
This project built on this previous research with four approaches: 1) analyze consistency between this work and other connectivity efforts; 2) asses trade-offs between current and future connectivity; 3) extend work on the prioritization of core habitat areas and central points of connectivity; and 4) optimize the selection of sites for conservation action at the local scale. This project had a regional focus of bottomland hardwoods, but also extended to include longleaf pine forests. This work was intended to provide a greater understanding of high priority areas for connectivity to inform conservation planners in the Southeast.
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Longleaf Pine, Georgia - Alan Cressler.jpg “Longleaf Pine Forest - Alan Cressler”
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Purpose
Habitat fragmentation and the resulting loss of biodiversity remains one of the most pressing conservation issues in the Southeastern U.S., and climate change is likely to disrupt linkages in the landscape even more. Maintaining connectivity between populations will be a key management strategy to conserving future biodiversity in the region. In previous research, we have modeled connectivity in the Southeast for three animals that inhabit bottomland forests, and shown where key connections in the landscape lie both currently and in the future. However, we observed large variation in connectivity across geographical areas, time periods, and species. Our results raised new questions about which connections are most important to focus on given this variation. We advance research to identify the most critical connections in the landscape. Our results will provide better direction for managers and other stakeholders to make decisions about conserving biodiversity and keeping landscapes connected now and in a changing world.
Project Extension
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Technical Summary
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Previous work by our group has determined high priority areas for connectivity in the Southeast based on multiple modeling techniques for three species that inhabit bottomland hardwood habitats. However, there is large variation in connectivity across geographical areas, time periods, and species, suggesting the need for more detailed connectivity analysis. We propose to build on our previous research with four approaches: 1) analyze consistency between our work and other connectivity efforts; 2) asses trade-offs between current and future connectivity; 3) extend work on node prioritization; and 4) optimize reserve design at the local scale. Our regional focus habitat will remain bottomland hardwoods, but we will extend our efforts to include longleaf pine forests. By doing so, we will gain a greater understanding of high priority areas for connectivity and better inform conservation planners in the Southeast.
Methods to achieve our proposal objectives are: 1) creation of ensemble models that apply a quantitative framework to indicate overlap among our models and many others that have been created directly by, or with support from, LCCs and conservation organizations; 2) use of graph theory to identify core areas that support the greatest number of connections, and most strongly increase the network connectivity, in a fragmented and warmer world; 3) identify priority nodes in an iterative process that includes quantitative analysis and input from regional experts, including LCCs; and 4) use of a spatial explicit framework that optimizes parcels for the economic cost and conservation benefit.