Forest Science: Special Issue on Science and Management of Forest Headwater Streams - 04/2007
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A valuable reference for foresters and watershed managers! Best management practices for forestry and forest practice rules have historically focused on protecting high-order fish bearing streams, but foresters and watershed managers are now recognizing that headwater streams comprise the majority of stream networks and are often strongly influenced by adjacent land. As a result, aquatic stewardship approaches and requirements for headwater streams in managed forests have recently received considerable attention. This attention, particularly in the Pacific Northwest, is focused on anadromous salmonids and the perception that lack of protection to headwater streams leads to deleterious impacts on the physical habitat and water quality of downstream reaches. There is also an emerging recognition that headwater reaches can support important non-fish communities including amphibians. To address these concerns, the Headwaters Research Cooperative (HRC) was founded in 2001 to augment the body of science on headwater streams. The Cooperative, formed by private and public organizations, hosted a meeting in the fall of 2001 to identify ongoing research and research needs related to forest headwater streams. The meeting attracted approximately 100 researchers and policy makers from throughout the Pacific Northwest, British Columbia, and across the United States, who interacted in focus groups on specific topics to develop lists of research priorities. The larger group then developed overall research priorities through consensus. This list became the roadmap for HRC to fund research efforts. HRC-funded research and other research that addressed the priorities list became the material for this special issue of Forest Science. Synthesis Articles Policy and Management for Headwater Streams in the Pacific Northwest: Synthesis and Reflection Sediment and Wood Routing in Steep Headwater Streams: An Overview of Geomorphic Processes and Their Topographic Signatures A Synthesis of the Ecology of Headwater Streams and Their Riparian Zones in Temperate Forests Influence of Headwater Streams on Downstream Reaches in Forested Areas Original Research Articles Timber Harvest Impacts on Water Yield in the Continental/Maritime Hydroclimatic Region of the United States Effects of Timber Harvest on Suspended Sediment Loads in Mica Creek, Idaho Influence of Timber Harvesting on Headwater Peak Stream Temperatures in a Northern Idaho Watershed NetMap: A new tool in support of watershed science and resource management On Debris Flows, River Networks, and the Spatial Structure of Channel Morphology Streamside Policies for Headwater Channels: An Example Considering Debris Flows in the Oregon Coastal Province Riparian Buffer and Density Management Influences on Microclimate of Young Headwater Forests of Western Oregon Headwater Riparian Microclimate Patterns under Alternative Forest Management Treatments Stream Macroinvertebrate Community Responses as Legacies of Forest Harvest at the H. J. Andrews Experimental Forest, Oregon Periphyton and Macroinvertebrate Assemblage Structure in Headwaters Bordered by Mature, Thinned, and Clear-Cut Douglas-Fir Stands Effects of Clearcutting and Riparian Buffers on the Yield of Adult Aquatic Macroinvertebrates from Headwater Streams Influence of Headwater Site Conditions and Riparian Buffers on Terrestrial Salamander Response to Forest Thinning Initial Effects of Headwater Riparian Reserves with Upslope Thinning on Stream Habitats and Amphibians Vertebrate Assemblages Associated with Headwater Hydrology in Western Oregon Managed Forests Headwater Streams and Timber Harvest: Channel, Macroinvertebrate, and Amphibian Response and Recovery Structures Linking Physical and Biological Processes in the Maybeso Watershed, Southeast Alaska