caa a22 4500 469074655 CHVBK 20180323132932.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF02573956 doi (NATIONALLICENCE)springer-10.1007/BF02573956 Regional scale analysis of denitrification in north temperate forest soils [Elektronische Daten] [Peter Groffman, James Tiedje, Delbert Mokma, Stephen Simkins] Large scale analyses of biogeochemical processes are necessary for understanding anthropogenic effects on global climate and environmental quality. Regional scale estimates of denitrification from forest soils in southern lower Michigan USA were produced by stratifying the region into landscape experimental units using soil texture and natural drainage classes, and extrapolating data to larger areas using a geographic information system (GIS). Previous landscape-scale research established relationships between soil texture and drainage and denitrification and quantified annual denitrification N loss in nine soil texture/drainage groups. All forest soils within the region (64 series) were assigned to one of these nine groups based on their texture and drainage characteristics and were assigned an annual denitrification N loss value. A regional estimate of denitrification was produced by multiplying the areal extent of each of the nine soil groups by their annual denitrification N loss value. Loam-textured soils underlie 47% of the regional forest and accounted for 73% of the forest denitrification. Sandy soils were found under 44% of the regional forest but produced only 5% of the regional denitrification. Clay loam soils underlie 9% of the regional forest and produced 22% of the denitrification. Annual denitrification N loss for the region was estimated as 1.4×107 kg N/yr. We used denitrification enzyme activity (DEA) as a proxy for annual denitrification N loss to determine if the relationship between denitrification and soil texture and natural drainage that we observed at the landscape scale held up at the regional scale. DEA was measured in 22 soils across the region and was strongly related to soil texture and natural drainage (r2=0.61), suggesting that extrapolation of data from the landscape to the regional scale was justified. SPB Academic Publishing bv, 1992 Groffman Peter Department of Crop and Soil Sciences, Michigan State University, 48824, East Lansing, MI aut Tiedje James Department of Crop and Soil Sciences, Michigan State University, 48824, East Lansing, MI aut Mokma Delbert Department of Crop and Soil Sciences, Michigan State University, 48824, East Lansing, MI aut Simkins Stephen Department of Crop and Soil Sciences, Michigan State University, 48824, East Lansing, MI aut Landscape Ecology Kluwer Academic Publishers 7/1(1992-03-01), 45-53 0921-2973 7:1<45 1992 7 10980 https://doi.org/10.1007/BF02573956 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02573956 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Groffman Peter Department of Crop and Soil Sciences, Michigan State University, 48824, East Lansing, MI aut NATIONALLICENCE 700 1- Tiedje James Department of Crop and Soil Sciences, Michigan State University, 48824, East Lansing, MI aut NATIONALLICENCE 700 1- Mokma Delbert Department of Crop and Soil Sciences, Michigan State University, 48824, East Lansing, MI aut NATIONALLICENCE 700 1- Simkins Stephen Department of Crop and Soil Sciences, Michigan State University, 48824, East Lansing, MI aut NATIONALLICENCE 773 0- Landscape Ecology Kluwer Academic Publishers 7/1(1992-03-01), 45-53 0921-2973 7:1<45 1992 7 10980 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer