title: Microbial transformations of labelled nitrogen in a clear-cut pine plantation.
abstract: Labelled nitrogen was used to evaluate the effects of intensive forest management on soil nitrogen transformations. The total release of N into inorganic forms (ammonium plus nitrate) was much greater than net N mineralization in all treatments. Immobilization of N by microbes was greatest in minimally-treated harvested plots, while the turnover of N within soil microbes was greatest in intensively-treated plots. Ammonium was immobilized 2.4-3.2 times more rapidly than nitrate in havested plots; nitrification in disturbed sites could thus increase the availability of N to regrowing vegetation.
authors.affiliation: Department of Biological Sciences, Stanford University, 94305, Stanford, CA, USA.|School of Forestry, Northern Arizona University, 86011, Flagstaff, AZ, USA.
authors.forename: Peter M
authors.initials: PM
authors.lastname: Vitousek
authors.affiliation: Department of Biological Sciences, Stanford University, 94305, Stanford, CA, USA.|School of Forestry, Northern Arizona University, 86011, Flagstaff, AZ, USA.
authors.forename: Steven W
authors.initials: SW
authors.lastname: Andariese