title: Combined environmental stress from shrimp farm and dredging releases in a subtropical coastal lagoon (SE Gulf of California).
abstract: 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.
authors.affiliation: CONACYT Research Fellow-Estación el Carmen, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Carretera Carmen-Puerto Real Km. 9.5, 24157 Ciudad del Carmen, Campeche, México.
authors.forename: J G
authors.initials: JG
authors.lastname: Cardoso-Mohedano
authors.affiliation: Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Mazatlán 82000, Sinaloa, México.
authors.forename: F
authors.initials: F
authors.lastname: Páez-Osuna
authors.affiliation: Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Mazatlán 82000, Sinaloa, México.
authors.forename: F
authors.initials: F
authors.lastname: Amezcua-Martínez
authors.affiliation: Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Mazatlán 82000, Sinaloa, México.
authors.forename: A C
authors.initials: AC
authors.lastname: Ruiz-Fernández
authors.affiliation: Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Mazatlán 82000, Sinaloa, México.
authors.forename: G
authors.initials: G
authors.lastname: Ramírez-Reséndiz
authors.affiliation: Unidad Académica Procesos Oceánicos y Costeros, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, 04510 México, D.F., México. Electronic address: jasanchez@cmarl.unam.mx.
authors.forename: J A
authors.initials: JA
authors.lastname: Sanchez-Cabeza
mesh_terms: D000818:Animals; D017756:Aquaculture; D002140:California; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D003445:Crustacea / Q000502:physiology*; D017753:Ecosystem; D004777:Environment; D004784:Environmental Monitoring; D005068:Eutrophication; D009584:Nitrogen / Q000032:analysis; D013312:Stress, Physiological; D014874:Water Pollutants, Chemical / Q000032:analysis*; D060753:Water Quality
chemical_list: D014874:Water Pollutants, Chemical; D002734:Chlorophyll; D009584:Nitrogen; D000077194:Chlorophyll A
keywords: Dredging; Environmental stress; Gulf of California; Nutrients; Shrimp farming