caa a22 4500 445383623 CHVBK 20180317143025.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s10021-011-9465-3 doi (NATIONALLICENCE)springer-10.1007/s10021-011-9465-3 Variation in Aboveground Cover Influences Soil Nitrogen Availability at Fine Spatial Scales Following Severe Fire in Subalpine Conifer Forests [Elektronische Daten] [Monica Turner, William Romme, Erica Smithwick, Daniel Tinker, Jun Zhu] Following fire, fine-scale variation in early successional vegetation and soil nutrients may influence development of ecosystem structure and function. We studied conifer forests burned by stand-replacing wildfire in Greater Yellowstone (Wyoming, USA) to address two questions: (1) How do the variability and spatial structure of aboveground cover and soil nitrogen availability change during the first 4years following stand-replacing fire? (2) At fine scales (2-20m), are postfire soil inorganic N pools and fluxes related to aboveground cover? Aboveground cover, soil N pools, and annual net N transformations were measured from 2001 to 2004 using a spatially explicit sampling design in four 0.25-ha plots that burned during summer 2000. Within-stand variability (coefficient of variation) in postfire live vegetative cover declined with time since fire, whereas variability in bare mineral soil, charred litter and fresh litter was greatest 2-3years postfire. The soil nitrate pool was more variable than the soil ammonium pool, but annual net nitrification was less variable than annual net N mineralization. Spatial structure (quantified by semivariograms) was observed in some aboveground cover variables (for example, graminoids and fresh litter), but there was little spatial structure in soil N variables and no obvious congruence in spatial scales of autocorrelation for soil N and aboveground cover. Significant Spearman correlations (at the sample point) indicated that aboveground cover and soil N were coupled following severe fire, and the dominant influence was from aboveground cover to soil N, rather than from soil N to vegetation. Initial patterns of fire severity and re-vegetation contributed to fine-scale heterogeneity in soil N availability for at least 4years after severe fire. Springer Science+Business Media, LLC, 2011 nitrogen cycling nationallicence fire ecology nationallicence succession nationallicence Pinus contorta nationallicence Picea engelmanii nationallicence Abies lasiocarpa nationallicence northern Rocky Mountains nationallicence spatial heterogeneity nationallicence geostatistics nationallicence semivariogram nationallicence scale nationallicence Turner Monica Department of Zoology, University of Wisconsin, 53706, Madison, Wisconsin, USA aut Romme William Department of Forest, Rangeland and Watershed Stewardship, and Graduate Degree Program in Ecology, Colorado State University, 80526, Fort Collins, Colorado, USA aut Smithwick Erica Department of Geography and Intercollege Graduate Program in Ecology, The Pennsylvania State University, 16802, University Park, Pennsylvania, USA aut Tinker Daniel Department of Botany, University of Wyoming, 82071, Laramie, Wyoming, USA aut Zhu Jun Department of Statistics, University of Wisconsin, 53706, Madison, Wisconsin, USA aut Ecosystems Springer-Verlag 14/7(2011-11-01), 1081-1095 1432-9840 14:7<1081 2011 14 10021 https://doi.org/10.1007/s10021-011-9465-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-011-9465-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Turner Monica Department of Zoology, University of Wisconsin, 53706, Madison, Wisconsin, USA aut NATIONALLICENCE 700 1- Romme William Department of Forest, Rangeland and Watershed Stewardship, and Graduate Degree Program in Ecology, Colorado State University, 80526, Fort Collins, Colorado, USA aut NATIONALLICENCE 700 1- Smithwick Erica Department of Geography and Intercollege Graduate Program in Ecology, The Pennsylvania State University, 16802, University Park, Pennsylvania, USA aut NATIONALLICENCE 700 1- Tinker Daniel Department of Botany, University of Wyoming, 82071, Laramie, Wyoming, USA aut NATIONALLICENCE 700 1- Zhu Jun Department of Statistics, University of Wisconsin, 53706, Madison, Wisconsin, USA aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/7(2011-11-01), 1081-1095 1432-9840 14:7<1081 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer