Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): M.D. Bryant
    Date: 1991
    Source: Gen. Tech. Rep. PNW-GTR-282. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station
    Publication Series: General Technical Report (GTR)
    Station: Pacific Northwest Research Station
    PDF: Download Publication  (2.9 MB)


    In July 1987, a 2-week synoptic survey was conducted on the wetlands of the Copper River Delta by an interdisciplinary team of scientists. Disciplines included geomorphology, limnology—water chemistry and nutrients, plankton and macroinvertebrates, anadromous fish populations, and wetland plant ecology. The purpose of this report is to present a summary of the findings of each group, preliminary conclusions, and recommendations for further research. The results are limited in scope due to the limited observation time and the single point in the year—midsummer. Because all observations were done concurrently at similar sites, the results are linked in time and place. Trends in productivity across the wetlands appear in the results. High rates of methane production indicated higher levels of production in ponds and beaver sloughs than expected as well as anaerobic decomposition processes in the ponds. Greater diversity in both phytoplankton and zooplankton species were observed in the ponds and sloughs than in glacial streams. Beaver ponds, sloughs and woodland streams were found to support the highest densities of juvenile coho salmon. Sockeye salmon were observed in the wetland and intertidal sloughs. The results indicated that complex interactions occur among geomorphology, plant succession, nutrient cycles, and hydrologic processes affecting biological production. Research should address ecosystem processes, linkages throughout the trophic structure, and successional stages within the wetlands.

    Publication Notes

    • Visit PNW's Publication Request Page to request a hard copy of this publication.
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Bryant, M.D., tech. ed. 1991. The Copper River Delta pulse study: an interdisciplinary survey of aquatic habitats. Gen. Tech. Rep. PNW-GTR-282. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station


    Google Scholar


    Wetlands, aquatic habitat. Copper River Delta, salmonid habitat, wetlands research, water chemistry, aquatic biology

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page