Journal ArticleDOI
Nutrient Limitation of Net Primary Production in Marine Ecosystems
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TLDR
There is a feeling among many limnologists and environmental engineers who study lakes that marine ecosystems also probably are phosphorus limited, and environmental management agencies often assume that phosphorus limitation in marine ecosystems is the rule.Abstract:
The question of nutrient limitation of primary production in estuaries and other marine ecosystems has engendered a great deal of debate. Although nitrogen is often named as the primary limiting nutrient in seawater (3, 17-19, 50, 52, 55, 61, 76, 80), this is by no means universally accepted. Many workers have argued that phosphorus is limiting (58, 71), that both nitrogen and phosphorus can simultaneously be limiting (9), or that primary production can switch seasonally from being nitrogen-limited to phosphorus-limited (6, 46). Others argue that nutrients are not limiting at all in many marine ecosystems, including highly oligotrophic waters (15). To some extent these disagreements result from poor communication due to different definitions of nutrient limitation. Considerable argument also occurs over the various methods and approaches used to estimate nutrient limitation. Limnologists in particular have tended to be critical of the methods often used to study nutrient limitation in marine ecosystems (23). Nutrient limitation in lakes has historically received more study than that in estuaries, and most mesotrophic and eutrophic north-temperate lakes are phosphorus limited (8, 62, 63, 66, 81). Thus, there is a feeling among many limnologists and environmental engineers who study lakes that marine ecosystems also probably are phosphorus limited. Lacking strong mechanistic arguments to explain why nutrient limitation might be different in estuaries than in lakes, environmental management agencies often assume that phosphorus limitation in marine ecosystems is the rule.read more
Citations
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The plumbing of the global biological pump: Efficiency control through leaks, pathways, and time scales
Benoît Pasquier,Mark Holzer +1 more
TL;DR: In this paper, the authors systematically quantify the pathways and timescales that set the efficiency, Ebio, of the global biological pump by applying Green-function-based diagnostics to a data-assimilated phosphorus cycle embedded in a jointly assimilated ocean circulation.
Journal Article
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Mónica Valenzuela-Siu,José Alfredo Arreola-Lizárraga,Salvador Sánchez-Carrillo,Gustavo Padilla-Arredondo +3 more
TL;DR: In this article, a modelo biogeoquimico LOICZ was used to estimate the flujos de nutrientes and the metabolism of a laguna semi-arida subtropical in the Golfo de California, Mexico.
Water Quality Modeling of Freshwater Diversions in the Pontchartrain Estuary
TL;DR: In this paper, a 1-D tidal, salinity and water quality model that analyzes the general effects freshwater diversions have on the water quality of the Pontchartrain Estuary over a 17-year period is presented.
Journal ArticleDOI
Seasonal uptake of carbon and nitrogen and intracellular storage of nitrate in planktonic organisms in the Skagerrak
TL;DR: It was concluded that nitrogen, rather than phosphorus, was limiting primary production during most parts of the year.
Journal ArticleDOI
The use of sedimentary %C, %N, δ15N, and Pb concentrations to assess historical changes in anthropogenic influence on Portuguese estuaries
TL;DR: The secular increase in %N, Pb, and delta(15)N signatures was significantly related to human density in the watersheds of the estuaries and were sensitive indicators of anthropogenic activity.
References
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Journal ArticleDOI
Particulate organic matter flux and planktonic new production in the deep ocean
TL;DR: The primary production in the oceans results from allochthonous nutrient inputs to the euphotic zone (new production) and from nutrient recycling in the surface waters (regenerated production) as discussed by the authors.
Journal ArticleDOI
Nitrogen, Phosphorus, and Eutrophication in the Coastal Marine Environment
TL;DR: Removal of phosphate from detergents is not likely to slow the eutrophication of coastal marine waters, and its replacement with nitrogen-containing nitrilotriacetic acid may worsen the situation.
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Nutrient limitation of phytoplankton in freshwater and marine environments: A review of recent evidence on the effects of enrichment1
R. E. Hecky,Peter Kilham +1 more
TL;DR: It is concluded that the extent and severity of N limitation in the marine environment remain an open question, despite the fact that by the late seventies the evidence for P limitation had become so great that phosphorus control was recommended as the legislated basis for controlling eutrophication in North American and European inland waters.