Experimental Evidence of the Tolerance to Chlorate of the Aquatic Macrophyte <i>Egeria densa</i> in a Ramsar Wetland in Southern Chile

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dc.contributor.authorPalma, Alvaro T.
dc.contributor.authorSchwarz, Alex O.
dc.contributor.authorFarina, Jose M.
dc.date.accessioned2025-01-24T00:04:49Z
dc.date.available2025-01-24T00:04:49Z
dc.date.issued2013
dc.description.abstractIn 2004, a massive die-off of the aquatic macrophyte Egeria densa occurred in a Ramsar wetland in southern Chile. In 2004, a pulp mill started its operations upstream from the wetland. Chlorate, a chemical compound found in pulp mill effluent, was one of the suspected causes of the observed ecosystem-level changes. The hypothesis was that high concentrations of chlorate in the wetland caused a massive die-off of the large populations of Egeria densa in this ecosystem. In this study several experimental efforts were aimed to understanding the potential effect of chlorate on E. densa. Plants were exposed to different doses of chlorate for variable periods in a large mesocosm array and several morphometric endpoints were quantified. Additionally, an ecotoxicological assay was implemented providing the first insight into the tolerance to chlorate of this aquatic plant. Both mesocosm and ecotoxicological evidences suggest that E. densa is tolerant to fairly high levels of chlorate (i.e. EC50 in the order of 1000 mg/L), at least three orders of magnitude larger than the highest concentration recorded in the wetland. Our results provide evidence that should guide the efforts of understanding the real causes of this environmental change.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s13157-012-0358-9
dc.identifier.eissn1943-6246
dc.identifier.issn0277-5212
dc.identifier.urihttps://doi.org/10.1007/s13157-012-0358-9
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101812
dc.identifier.wosidWOS:000314728600010
dc.issue.numero1
dc.language.isoen
dc.pagina.final140
dc.pagina.inicio129
dc.revistaWetlands
dc.rightsacceso restringido
dc.subjectPulp mill effluent
dc.subjectChlorate
dc.subjectWater quality
dc.subjectAquatic macrophyte
dc.subjectWetland
dc.subject.ods06 Clean Water and Sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleExperimental Evidence of the Tolerance to Chlorate of the Aquatic Macrophyte <i>Egeria densa</i> in a Ramsar Wetland in Southern Chile
dc.typeartículo
dc.volumen33
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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