HR: 10:45h
AN: NB52B-02 INVITED     [Abstracts]
TI: Effects of Logging on Macroinvertebrate Responses to Watershed- and Patch-Scale Habitat Characteristics in the Adirondack Uplands
AU: * Woodcock, T
EM: woodcot@plattsburgh.edu
AF: Lake Champlain Research Institute and Center for Earth and Environmental Science, 102 Hudson Hall Plattsburgh State University, Plattsburgh, NY 12901 United States
AU: Mihuc, T
EM: timothy.mihuc@plattsburgh.edu
AF: Lake Champlain Research Institute and Center for Earth and Environmental Science, 102 Hudson Hall Plattsburgh State University, Plattsburgh, NY 12901 United States
AU: Romanowicz, E
EM: edwin.romanowicz@plattsburgh.edu
AF: Lake Champlain Research Institute and Center for Earth and Environmental Science, 102 Hudson Hall Plattsburgh State University, Plattsburgh, NY 12901 United States
AU: Allen, E
EM: alleneb@plattsburgh.edu
AF: Lake Champlain Research Institute and Center for Earth and Environmental Science, 102 Hudson Hall Plattsburgh State University, Plattsburgh, NY 12901 United States
AB: Watershed characteristics and land use practices can affect stream habitats at a variety of scales. A suite of variables describing watershed geomorphology (area, circularity, slope, elevation, aspect, soil depth, surficial geology), surface water hydrology (drainage density, baseflow discharge, `flashiness', groundwater influx, water velocity), and channel habitat (slope, width, depth, substrate particle size, stored and transported organic matter, transported sediment) were determined using GIS and field surveys in 19 upland Adirondack (New York) watersheds with differing land use. Watershed geomorphology was similar between land use types. However, Forest Preserve streams tended to have deeper and wider channels, despite steeper channel slopes, while streams in logged watersheds had more stored organic matter and finer substrate. 177 macroinvertebrate taxa were recorded in the streams, and taxa richness was significantly reduced in managed watersheds (p=0.006). 27 taxa showed a bias toward Preserve sites, while 9 were more common in managed streams (chi-square, p<0.10). Distributions of these taxa were related to channel geomorphology and particle size at the patch scale, and watershed circularity, ground and surface water drainage patterns, and inorganic sediment load at the watershed scale. Invertebrate distributions were affected both by land use patterns and watershed-scale geomorphologic variables.
DE: 1803 Anthropogenic effects
DE: 1824 Geomorphology (1625)
SC: North American Benthological Society [NB]
MN: 2005 Joint Assembly