Second-Growth Riparian Forest Management and Stream Productivity

Cooperative Agreement with US Forest Service

Principle investigators:

Mark S. Wipfli,
Aquatic-Land Interactions Research Program,
Pacific N.W. Research Station, Juneau, AK

J. David Allan,
School of Natural Resources & Environment,
Univ. of Michigan, Ann Arbor, MI

Title: Second-Growth Riparian Forest Management and Stream Productivity


Project Summary:
Management practices for riparian forests bordering streams and rivers have the potential to profoundly influence energy pathways critical to aquatic food webs supporting anadromous salmonids. alaska river landingWe propose to quantify key energy pathways influencing the productivity of salmonid streams in southeastern Alaska, and to determine how riparian management and restoration activities affect these pathways. The project will focus on salmonid-rearing (low-order) streams that differ in riparian and forest communities. Streams will be chosen with three types of riparian vegetation: second-growth alder-dominated, second-growth conifer-dominated, and old-growth riparian. Comparisons of food-web Old growth forest imageproductivity will be made among these three systems during the first phase of the study (first 1-2 yr). In subsequent years, second-growth canopy thinning, developed to be consistent with practical thinning regimes prescribed by Ranger Districts within the Tongass National Forest, will occur at selected sites to study short and long-term food-web productivity dynamics. Sampling protocols, intensity and duration for this second long-term phase will hinge on future funding.
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Last updated January 25, 1998
J.D. Allan, School of Natural Resources & Environment
University of Michigan