How do chronic nutrient loading and the duration of nutrient pulses affect nutrient uptake in headwater streams?
نویسندگان
چکیده
منابع مشابه
Nutrient pressures and ecological responses to nutrient loading reductions in Danish streams, lakes and coastal waters
The Danish National Aquatic Monitoring and Assessment Programme (NOVA) was launched in 1988 following the adoption of the first Danish Action Plan on the Aquatic Environment in 1987 with the aim to reduce by 50% the nitrogen (N) loading and by 80% the phosphorus (P) loading to the aquatic environment. The 14 years of experience gathered from NOVA have shown that discharges of total N (TN) and P...
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BRIAN H. HILL* , FRANK H. M CCORMICK , BRET C. HARVEY , SHERRI L. JOHNSON , MELVIN L. WARREN AND COLLEEN M. ELONEN* *U. S. Environmental Protection Agency, Mid-Continent Ecology Division, Duluth, MN, U.S.A. U. S. Forest Service, Rocky Mountain Research Station, Boise, ID, U.S.A. U. S. Forest Service, Pacific Southwest Research Station, Arcata, CA, U.S.A. U. S. Forest Service, Forestry Sciences ...
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The constant nutrient addition technique has been used extensively to measure nutrient uptake in streams. However, this technique is impractical for large streams, and the pulse nutrient addition (PNA) has been suggested as an alternative. We developed a computer model to simulate Monod kinetics nutrient uptake in large rivers and used this model to evaluate the sensitivity of the PNA technique...
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Nutrient exchange mutualisms between phototrophs and heterotrophs, such as plants and mycorrhizal fungi or symbiotic algae and corals, underpin the functioning of many ecosystems. These relationships structure communities, promote biodiversity and help maintain food security. Nutrient loading may destabilise these mutualisms by altering the costs and benefits each partner incurs from interactin...
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Nutrient Loading Factors Phosphorus Nitrogen Surface Runoff Coefficients lb P/acre/year lb N/acre/year LAND USE Low High Low High Low High [1] HD Res.(>8 /ac) 0.64 0.77 3.6 4.4 11.9 14.3 [2] MHD Res.(4-7.9/ac) 0.39 0.64 2.2 3.6 7.3 11.9 [3] MD Res.(1-3.9/ac) 0.23 0.39 1.3 2.2 4.3 7.3 [4] MLD Res.(0.5-0.9/ac) 0.16 0.23 0.9 1.3 3.0 4.3 [5] LD Res.(<0.5/ac) 0.10 0.16 0.6 0.9 1.9 3.0 [6] Commercial...
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ژورنال
عنوان ژورنال: Biogeochemistry
سال: 2018
ISSN: 0168-2563,1573-515X
DOI: 10.1007/s10533-018-0518-y