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dc.creatorJessen Rasmussen, Jes
dc.creatorCarazo Rojas, Elizabeth
dc.creatorMuñoz Rivera, Alejandro
dc.creatorReiler, Emilie Marie
dc.creatorMatarrita Rodríguez, Jessie Alejandra
dc.creatorCedergreen, Nina
dc.date.accessioned2018-04-04T16:40:34Z
dc.date.available2018-04-04T16:40:34Z
dc.date.issued2016-01-15
dc.identifier.citationhttps://www.sciencedirect.com/science/article/pii/S0048969715308780?via%3Dihubes_ES
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/10669/74414
dc.description.abstractMany tropical countries contain a high density of protected ecosystems, and these may often be bordered by intensive agricultural systems. We investigated the chemical and ecological status of a stream connecting an area with conventional rice production and a downstream protected nature reserve; Mata Redonda. Three sites were sampled: 1) an upstream control, 2) in the rice production area and 3) a downstream site in Mata Redonda. We sampled benthic macroinvertebrates and pesticides in water and sediments along with supporting physical and chemical data. Pesticide concentrations in water exceeded current safety thresholds at sites 2 and 3, especially during the rainy season, and sediment associated pesticide concentrations exceeded current safety thresholds in three of six samples. Importantly, the highest predicted pesticide toxicity in sediments was observed at site 3 in the Mata Redonda confirming that the nature reserve received critical levels of pesticide pollution from upstream sections. The currently used macroinvertebrate index in Costa Rica (BMWP-CR) and an adjusted version of the SPecies At Risk index (SPEAR) were not significantly correlated to any measure of anthropogenic stress, but the Average Score Per Taxon (ASPT) index was significantly correlated with the predicted pesticide toxicity (sumTUD. magna), oxygen concentrations and substrate composition. Our results suggest that pesticide pollution was likely involved in the impairment of the ecological status of the sampling sites, including site 3 in Mata Redonda. Based on our results, we give guidance to biomonitoring in Costa Rica and call for increased focus on pesticide transport from agricultural regions to protected areas.es_ES
dc.description.sponsorshipSistema Nacional de Areas de Conservacion, Ministerio de Ambiente y Energía//SINAC/Costa Ricaes_ES
dc.description.sponsorshipLaboratorio de Ecotoxicología, Centro de Investigación en Contaminación Ambiental//CICA/Costa Ricaes_ES
dc.language.isoen_USes_ES
dc.sourceScience of The Total Environment, Vol. 542, Part A, 2016es_ES
dc.subjectTropical streamses_ES
dc.subjectMacroinvertebrateses_ES
dc.subjectPesticideses_ES
dc.subjectRisk assessmentes_ES
dc.subjectEcological quality indiceses_ES
dc.subjectProtected areases_ES
dc.titleInfluence of rice field agrochemicals on the ecological status of a tropical streames_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.typeArtículo científicoes_ES
dc.identifier.doi10.1016/j.scitotenv.2015.10.062
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro en Investigación en Contaminación Ambiental (CICA)es_ES
dc.description.procedenceUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Biologíaes_ES


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