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Influence of dissolved organic carbon on the limnochemical characteristics of a tropical endorheic wetland during a hydrological period: El Eneal Wetland, Colombia
Influencia del carbono orgánico disuelto en las características limnoquímicas de un humedal endorreico tropical durante un período hidrológico: Humedal El Eneal, Colombia
DOI:
https://doi.org/10.15446/dyna.v93n240.119929Palabras clave:
DOC, tropical wetland, limnochemistry, DOM, endorheic (en)DOC, humedal tropical, limnoquímica, DOM, endorreico (es)
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The progressive darkening of inland waters globally has been attributed to increasing dissolved organic carbon (DOC) concentrations, yet this phenomenon remains understudied in tropical systems. This research investigated DOC's influence on the limnochemical characteristics of a tropical endorheic wetland through two sampling campaigns during different hydrological periods. DOC was measured alongside key limnological variables, with relationships analyzed through descriptive statistics and principal component analysis. Results demonstrated significant positive correlations between DOC and electrical conductivity (r=0.78, p<0.001) and turbidity (r=0.74, p<0.001), while inverse correlations emerged with bicarbonates (r=-0.80, p<0.001), ORP (r=-0.61, p<0.001), and chlorophyll-a (r=-0.75, p<0.001). However, these associations likely reflect synchronous responses to increasing water levels rather than direct DOC effects. Our findings suggest DOC potentially regulates phytoplankton biomass and optical properties in this tropical wetland system.
El oscurecimiento progresivo de aguas continentales se ha atribuido al incremento de carbono orgánico disuelto (COD), fenómeno poco estudiado en sistemas tropicales. Esta investigación evaluó la influencia del COD en las características limnoquímicas de un humedal endorreico tropical mediante dos campañas de muestreo en diferentes periodos hidrológicos. Se midió el COD junto con parámetros limnológicos, analizando relaciones mediante estadística descriptiva y análisis de componentes principales. Los resultados mostraron correlaciones positivas significativas entre COD y conductividad eléctrica (r=0,78, p<0,001) y turbidez (r=0,74, p<0,001), y correlaciones inversas con bicarbonatos (r=-0,80, p<0,001), ORP (r=-0,61, p<0,001) y clorofila-a (r=-0,75, p<0,001). Estas asociaciones probablemente reflejan respuestas sincrónicas al aumento del nivel hídrico más que efectos directos del COD. Los hallazgos sugieren que el COD regula potencialmente la biomasa fitoplanctónica y las propiedades ópticas del sistema.
Referencias
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