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Developing a broader scientific foundation for river restoration: Columbia River food webs

Proceedings of the National Academy of Sciences of the United States of America

By:
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DOI: 10.1073/pnas.1213408109

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Abstract

Well-functioning food webs are fundamental for sustaining rivers as ecosystems and maintaining associated aquatic and terrestrial communities. The current emphasis on restoring habitat structure—without explicitly considering food webs—has been less successful than hoped in terms of enhancing the status of targeted species and often overlooks important constraints on ecologically effective restoration. We identify three priority food web-related issues that potentially impede successful river restoration: uncertainty about habitat carrying capacity, proliferation of chemicals and contaminants, and emergence of hybrid food webs containing a mixture of native and invasive species. Additionally, there is the need to place these food web considerations in a broad temporal and spatial framework by understanding the consequences of altered nutrient, organic matter (energy), water, and thermal sources and flows, reconnecting critical habitats and their food webs, and restoring for changing environments. As an illustration, we discuss how the Columbia River Basin, site of one of the largest aquatic/riparian restoration programs in the United States, would benefit from implementing a food web perspective. A food web perspective for the Columbia River would complement ongoing approaches and enhance the ability to meet the vision and legal obligations of the US Endangered Species Act, the Northwest Power Act (Fish and Wildlife Program), and federal treaties with Northwest Indian Tribes while meeting fundamental needs for improved river management.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Developing a broader scientific foundation for river restoration: Columbia River food webs
Series title:
Proceedings of the National Academy of Sciences of the United States of America
DOI:
10.1073/pnas.1213408109
Edition:
published online before print
Year Published:
2012
Language:
English
Publisher:
National Academy of Sciences
Publisher location:
Washington, D.C.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article