NUTRIENT FLUXES IN SEDIMENT (NH(4)(-3) IN NW COASTAL LAGOON MEXICO ASSOCIATED WITH AN AGROINDUSTRIAL BASIN() AND PO4)

Citation
Gd. Espino et Ff. Verdugo, NUTRIENT FLUXES IN SEDIMENT (NH(4)(-3) IN NW COASTAL LAGOON MEXICO ASSOCIATED WITH AN AGROINDUSTRIAL BASIN() AND PO4), Water, air and soil pollution, 107(1-4), 1998, pp. 105-120
Citations number
25
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environmental Sciences","Water Resources","Metereology & Atmospheric Sciences
Journal title
ISSN journal
0049-6979
Volume
107
Issue
1-4
Year of publication
1998
Pages
105 - 120
Database
ISI
SICI code
0049-6979(1998)107:1-4<105:NFIS(I>2.0.ZU;2-Q
Abstract
In order to balance the impact of agricultural development on land aro und coastal lagoons with the protection of aquatic resources, knowledg e of the role of the sedimentary phase in the entrapment or availabili ty of nutrients in the water column in areas affected by agroindustria l outlets is important. The Ensenada del Pabellon coastal on the Pacif ic coast of Mexico was chosen to be analyzed. The input of ammonium an d orthophosphate from sediment using semicontrolled benthic chambers n ear a sugar cane factory outlet was compared to non altered sediment. Phosphate and ammonia loading from agroindustrial outlets has been the primary cause of eutrophication. The inputs of ammonium and orthophos phates from the sediment to the water column depend on their concentra tion in the agroindustrial outlet's waste water, the local morphology, the tide, and biotic assimilation, in order of importance. Sediment i n non-altered revealed maxima of 7.8 mg m(-2) d(-1) of NH4+ and 1.4 mg m(-2) d(-1) of PO4-3, whereas in one outlet that greatly transfigures the environment, maxima of 223 mg m(-2) d(-1) of NH4+ and 67 mg m(-2) d(-1) of PO4-3 were recorded, which represent an increase greater tha n 20 times the normal diffusion; These figures varied markedly in spac e and time. Results from the study indicated that existing levels of n utrient could endanger the future of this ecosystem, including its sus tainable fisheries.