期刊
MARINE POLLUTION BULLETIN
卷 104, 期 1-2, 页码 83-91出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2016.02.008
关键词
Environmental stress; Nutrients; Shrimp farming; Dredging; Gulf of California
资金
- Impactos del Cambio Climatico y Global en zonas costeras de Mexico
- CONACYT [PDCPN2013-01/214349]
- Renovacion de equipo cientifico para el fortalecimiento de la investigacion regional en Geoquimica Ambiental y Cambio Global (CONACYT) [INFR-2013-01 204818]
- Red de colaboracion academica Contaminacion acuatica: Niveles y efectos (ano)
Nutrient pollution causes environmental damages on aquatic ecosystems worldwide. Eutrophication produces impacts in coastal ecosystems, affecting biota and ecosystem services. The Urias coastal lagoon (SE Gulf of California) is a sub-tropical estuary under several environmental pressures such as nutrient inputs from shrimp farm effluents and dredging related to port operations, which can release substances accumulated in sediments. We assessed the water quality impacts caused by these activities and results showed that i) nitrogen was the limiting nutrient, ii) shrimp farm effluents increased particulate organic matter and chlorophyll a in the receiving stations, and iii) dredging activities increased nitrite and reduced dissolved oxygen concentrations. The co-occurrence of the shrimp farm releases and dredging activities was likely the cause of a negative synergistic effect on water quality which mainly decreases dissolved oxygen and increases nitrite concentrations. Coastal zone management should avoid the co-occurrence of these, and likely others, stressors in coastal ecosystems. (C) 2016 Elsevier Ltd. All rights reserved.
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