Nitrogen Cycling in a Forest Stream Determined by a 15 N Tracer Addition
نویسندگان
چکیده
منابع مشابه
Nitrogen Cycling in a Fowst Stream Determined by a 15n Tracer Addition
'Environmental Sciences Division, Oak Ridge National Luboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831 USA LDeparrment of Natural Resources and Environmental Sciences, University of Illinois, Urbana, Illinois 61801 USA ?Institute of Ecology. University of Georgia. Athens, Georgia 30602 USA -'Ecosystems Center. Marine Biological Luboratory, Woods Hole, Massachusetts 02543 USA 'Department of ...
متن کاملAnalysis of nitrogen cycling in a forest stream during autumn using a lSN-tracer addition
We added l5NH4C1 over 6 weeks to Upper Ball Creek, a second-order deciduous forest stream in the Appalachian Mountains, to follow the uptake, spiraling, and fate of nitrogen in a stream food web during autumn. A priori predictions of N flow and retention were made using a simple food web mass balance model. Values of iY5N were determined for stream water ammonium, nitrate, dissolved organic nit...
متن کاملNitrogen Uptake, Retention and Cycling in Stream Ecosystems: An Intersite N-15 Tracer Experiement
II. BACKGROUND, RESEARCH OBJECTIVES AND SIGNIFICANCE A. Nitrogen cycling in streams Nitrogen is an element of considerable interest in lotic ecosystems. It limits productivity in some flowing waters (e. g. Grimm and Fisher 1986), while in others it is present to such excess that legislators have called for a 50% reduction by the year 2000 ( Haycock et al. 1993). In the U. S. nitrogen loading ha...
متن کاملCoupled Cycling of Dissolved Organic Nitrogen and Carbon in a Forest Stream
Dissolved organic nitrogen (DON) is an abundant but poorly understood pool of N in many ecosystems. We assessed DON cycling in a N-limited headwater forest stream via whole-ecosystem additions of dissolved inorganic nitrogen (DIN) and labile dissolved organic matter (DOM), hydrologic transport and biogeochemical modeling, and laboratory experiments with native sediments. We sampled surface and ...
متن کاملCoupled Cycling of Dissolved Organic Nitrogen and Carbon in a Forest Stream
Dissolved organic nitrogen (DON) is an abundant but poorly understood pool of N in many ecosystems. We assessed DON cycling in a N-limited headwater forest stream via whole-ecosystem additions of dissolved inorganic nitrogen (DIN) and labile dissolved organic matter (DOM), hydrologic transport and biogeochemical modeling, and laboratory experiments with native sediments. We sampled surface and ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Ecological Monographs
سال: 2000
ISSN: 0012-9615
DOI: 10.2307/2657212