Conserving biodiversity and ecosystem function through limited development: an empirical evaluation

Area of Science:

• Conservation science
• Land use planning
• Biodiversity protection

Background:

• Suburban, exurban, and rural development in the U.S. consumes vast land resources annually, posing a significant threat to biodiversity.
• Conservation development aims to balance land development with conservation goals, but its effectiveness lacks thorough evaluation.
• Conservation and limited development projects (CLDPs) are a specific type of conservation development, utilizing limited development revenue to fund land protection.

Purpose of the Study:

• To critically evaluate the conservation effectiveness of CLDPs.
• To compare the conservation outcomes of CLDPs against baseline conventional development and conservation subdivisions.
• To develop and apply a robust evaluation method for assessing conservation development projects.

Main Methods:

• A sample of 10 CLDPs in the eastern U.S. were compared to their baseline conventional development scenarios and to conservation subdivisions.
• An evaluation method with eight indicators was created to quantify impacts on terrestrial and aquatic ecosystems at project and landscape levels.
• The method assessed protection and management of threatened natural resources, including rare species and ecological communities.

Main Results:

• CLDPs demonstrated significant success in protecting and managing threatened natural resources.
• CLDPs significantly outperformed both their baseline conventional development scenarios and conservation subdivisions in conservation benefits.
• The evaluation method provided quantifiable data on the ecological impacts of CLDPs.

Conclusions:

• CLDPs present a viable low-impact alternative to conventional development.
• CLDPs offer a cost-effective strategy for land protection, especially when traditional methods are financially prohibitive.
• The developed evaluation method can guide planners and developers in incorporating ecological considerations into conservation development projects.