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Natural and human-induced hypoxia and consequences for coastal areas: Synthesis and future development

DRS at CSIR-National Institute of Oceanography

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Title Natural and human-induced hypoxia and consequences for coastal areas: Synthesis and future development
 
Creator Zhang, J.
Gilbert, D.
Gooday, A.J.
Levin, L.
Naqvi, S.W.A.
Middelburg, J.J.
Scranton, M.
Ekau, W.
Pena, A.
Dewitte, B.
Oguz, T.
Monteiro, M.S.
Urban, E.
Rabalais, N.N.
Ittekkot, V.
Kemp, W.M.
Ulloa, O.
Elmgren, R.
Escobar-Briones, E.
Van der Plas, A.K.
 
Subject Hypoxia
coastal ecosystems
upwelling
dissolved oxygen
 
Description Hypoxia has become a world-wide phenomenon in the global coastal ocean and causes a deterioration of the structure and function of ecosystems. Based on the collective contributions of members of SCOR Working Group 128, the present study provides an overview of the major aspects of coastal hypoxia in different biogeochemical provinces, including estuaries, coastal waters, upwelling areas, fjords and semi-enclosed basins, with various external forcings, ecosystem responses, feedbacks and potential impact on the sustainability of the fishery and economics. The obvious external forcings include freshwater runoff and other factors contributing to stratification, organic matter and nutrient loadings, as well as exchange between coastal and open ocean water masses. Their different interactions set up mechanisms that drive the system towards hypoxia. Coastal systems also vary in their relative susceptibility to hypoxia depending on their physical and geographic settings. It is understood that coastal hypoxia has a profound impact on the sustainability of ecosystems, which can be seen, for example, by the change in the food-web structure and system function; other influences include compression and loss of habitat, as well as changes in organism life cycles and reproduction. In most cases, the ecosystem responds to the low dissolved oxygen in non-linear ways with pronounced feedbacks to other compartments of the Earth System, including those that affect human society. Our knowledge and previous experiences illustrate that there is a need to develop new observational tools and models to support integrated research of biogeochemical dynamics and ecosystem behavior that will improve confidence in remediation management strategies for coastal hypoxia
 
Date 2010-05-19T08:37:06Z
2010-05-19T08:37:06Z
2010
 
Type Journal Article
 
Identifier Biogeosciences, vol.7(5); 1443-1467
http://drs.nio.org/drs/handle/2264/3615
 
Language en
 
Rights © Author(s) 2010. CC Attribution 3.0 License.
 
Publisher European Geosciences Union