Size Fractionation of Dissolved Organic Nitrogen in Peatland Fluvial Systems
نویسندگان
چکیده
منابع مشابه
Characteristics of dissolved organic matter following 20years of peatland restoration.
The changes in the amounts and composition of dissolved organic matter (DOM) following long-term peat restoration are unknown, although this fraction of soil organic matter affects many processes in such ecosystems. We addressed this lack of knowledge by investigating a peatland in south-west Germany that was partly rewetted 20 years ago. A successfully restored site and a moderately drained si...
متن کاملGlobal effects of agriculture on fluvial dissolved organic matter
Agricultural land covers approximately 40% of Earth's land surface and affects hydromorphological, biogeochemical and ecological characteristics of fluvial networks. In the northern temperate region, agriculture also strongly affects the amount and molecular composition of dissolved organic matter (DOM), which constitutes the main vector of carbon transport from soils to fluvial networks and to...
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We examined the ability of seagrasses to take up dissolved organic nitrogen (DON) with leaves (in situ) and roots (laboratory) in an oligotrophic tropical offshore meadow in Indonesia using 15N-labeled nitrogen (N) substrates. We compared the uptake of urea and amino acids with that of ammonium (NH z4 ) and nitrate (NO { 3 ) and determined uptake kinetics of amino acids for the seagrasses Thala...
متن کاملDissolved organic nitrogen: an overlooked pathway of nitrogen loss from agricultural systems?
Conventional wisdom postulates that leaching losses of N from agriculture systems are dominated by NO(3)(-). Although the export of dissolved organic nitrogen (DON) into the groundwater has been recognized for more than 100 yr, it is often ignored when total N budgets are constructed. Leaching of DON into stream and drinking water reservoirs leads to eutrophication and acidification, and can po...
متن کاملDissolved Organic Nitrogen: An Overlooked Pathway of Nitrogen Loss from Agricultural Systems?
Conventional wisdom postulates that leaching losses of N from agriculture systems are dominated by NO3 – . Although the export of dissolved organic nitrogen (DON) into the groundwater has been recognized for more than 100 yr, it is often ignored when total N budgets are constructed. Leaching of DON into stream and drinking water reservoirs leads to eutrophication and acidifi cation, and can pos...
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ژورنال
عنوان ژورنال: Environmental Science & Technology
سال: 2018
ISSN: 0013-936X,1520-5851
DOI: 10.1021/acs.est.8b01417