Nitrogen budgets and dissolved organic matter cycling
نویسندگان
چکیده
منابع مشابه
Dissolved organic nitrogen budgets for upland, forested ecosystems in New England
Relatively high deposition of nitrogen (N) in the northeastern United States has caused concern because sites could become N saturated. In the past, mass-balance studies have been used to monitor the N status of sites and to investigate the impact of increased N deposition. Typically, these efforts have focused on dissolved inorganic forms of N (DIN = NH4-N + NO3-N) and have largely ignored dis...
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 کاملChemical composition and cycling of dissolved organic matter in the Mid-Atlantic Bight
This study focuses on the chemical characterization of high molecular-weight dissolved organic matter (HMW DOM) isolated from the Middle Atlantic Bight in April 1994 and March 1996. Using proton nuclear magnetic resonance spectroscopy (HNMR) and monosaccharide analysis we compared both spatial and temporal variations in the chemical structure of HMW DOM across this region. Our analyses support ...
متن کاملThe Source, Cycling, and Behavior of Chromophoric Dissolved Organic Matter in Coastal Waters
Our long term research goal is to ascertain the nature and magnitude of optical effects (absorbance / fluorescence / scattering) in surface seawaters associated with the production and cycling of marine colloidal organic matter. We are particularly interested in determining how these effects are driven or modulated by the productivity dynamics of phytoplankton and marine heterotrophic bacteria ...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 1992
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps090201