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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Journal ArticleDOI
The Effects of Varying Salinity on Ammonium Exchange in Estuarine Sediments of the Parker River, Massachusetts
TL;DR: In this article, the authors examined the effects of seasonal salinity changes on sediment ammonium adsorption and exchange across the sediment-water interface in the Parker River Estuary, by means of seasonal field sampling, laboratory tests, and modeling.
Book ChapterDOI
4.08 – Submarine Groundwater Discharge: A Source of Nutrients, Metals, and Pollutants to the Coastal Ocean
Karen L. Knee,Adina Paytan +1 more
TL;DR: A review of the current state of knowledge on submarine groundwater discharge and the associated fluxes of nutrients, trace metals, microbes, pharmaceuticals, and other terrestrial constituents to coastal waters is provided in this paper.
Journal ArticleDOI
The discharge of nitrate‐contaminated groundwater from developed shoreline to marsh‐fringed estuary
TL;DR: In this article, the Nauset Marsh estuary (Eastham, Massachusetts) was studied and it was found that groundwater discharge into the Nomeset Marsh (EASTHAM, MA) occurred in high-velocity seeps immediately seaward of the upland-fringing salt marsh.
Journal ArticleDOI
Nitrogen cycling in an estuarine upwelling system, the Ría de Arousa (NW Spain). I. Short-time-scale patterns of hydrodynamic and biogeochemical circulation
TL;DR: Low rates of particulate organic nltrogen sedimentation and low levels of conversion to dissolved organic neltrogen were observed during the development of a red tide assemblage, appearing to be held evidence of limited filtration by mussels in the presence of these organisms.
Journal ArticleDOI
Comparing Nitrogen Runoff and Leaching between Newly Established St. Augustinegrass Turf and an Alternative Residential Landscape
TL;DR: The results from the newly established landscapes presented here indicated that St. Augustinegrass was more efficient at using applied N and minimizing N leaching compared with the alternative landscape, and identified areas of concern with respect to N management practices on alternative landscapes.
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.
Journal ArticleDOI
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.