HR: 0830h
AN: B21D-0739    [PDF]
TI: Soil N and C Geography of the Salmon River Watershed and the Oregon Coast
AU: * Kern, J S
EM: jeff@mail.cor.epa.gov
AF: Dynamac Corporation, 200 SW 35th St, Corvallis, OR 97333 United States
AU: Compton, J E
EM: compton.jana@epa.gov
AF: US Environmental Protection Agency, 200 SW 35th ST, Corvallis, OR 97333 United States
AU: Johnson, M G
EM: johnson.markg@epa.gov
AF: US Environmental Protection Agency, 200 SW 35th ST, Corvallis, OR 97333 United States
AB: Diverse soil and geology influence the rich terrestrial and aquatic biota of the Oregon Coast. We characterized the spatial patterns of soil organic C (SOC) and N by assembling county and forest soil surveys combined with new fieldwork, and analyses from sampled soils. The headlands have maximum SOC and N where wind deposited volcanic soil is coupled with a cool, moist climate. The SOC and N decreases inland in similar soils that have a less marine climate influence. The underlying geology (basalt or sedimentary rock) had no affect in SOC and N. The remainder of the watershed has less SOC and N depending on rock content and soil depth which were affected by lithology as well as microclimate, and tree stand history. Extrapolating SOC and N trends to the region provides information for an area with no significant N deposition from air pollution.
DE: 0330 Geochemical cycles
SC: Biogeosciences [B]
MN: 2003 Fall Meeting