Spatial Heterogeneity of Water Quality in a Highly Degraded Tropical Freshwater Ecosystem.Published in:Environmental Management, 2009, v. 43, n. 2, p. 249, doi. 10.1007/s00267-008-9216-1By:Zambrano, Luis;Contreras, Victoria;Mazari-Hiriart, Marisa;Zarco-Arista, AlbaPublication type:Article