Selección de hábitat en camarones Atyaephyra desmarestii (Millet, 1831) expuestos a un escenario heterogéneo de contaminación
Archivos
NO SE HA AUTORIZADO la consulta de los documentos asociados
Fecha
2018-07-05
Autores
Título de la revista
ISSN de la revista
Título del volumen
Editor
Jaén: Universidad de Jaén
Resumen
[ES] Este trabajo evaluó la selección de hábitat del camarón Atyaephyra desmarestii, expuesto a
diferentes concentraciones de cobre, verificando si la distribución heterogénea del contaminante y
la conectividad entre hábitats podria generar una dinámica de distribución similar a la
metapoblación. Los ensayos se desarrollaron en el HeMHAS (Heterogeneous Multi-Habitat Assay
System), un sistema de exposición no forzada, estableciedo tres tratamientos: referencia poco
contaminada (26±7 μg/L Cu), mezcla (61±2 μg/L Cu) y contaminado (101±12 μg/L Cu). Estos
tratamientos fueron distribuidos en el HeMHAS formando tres escenarios diferentes: uno como
gradiente lineal y dos escenarios simulando parches de contaminación heterogéneos. En los
ensayos control los organismos no presentaron preferencia por ninguna de las zonas. En
escenarios de contaminación muy marcados (gradiente), los camarones son capaces de evitar y
seleccionar zonas menos perturbadas, mientras que en ambientes más heterogéneos (parches),
resulta de alta relevancia conservar zonas limpias, que representan áreas de amortiguamiento
ante la contaminación, para evitar los efectos tóxicos.
[EN] This work evaluated the habitat selection response by the shrimp Atyaephyra desmarestii, exposed to different concentrations of copper, verifying simultaneously if the heterogeneous distribution of the levels of contaminant and the connectivity between habitats could generate a random population distribution similar to metapopulation arrangement. The ssays were performed in the HeMHAS ( Heterogeneous Multi-Habitat Assay System), an non-forced exposure system, establishing three treatments: reference zone (26± 7 μg/L Cu), mixing zone (61± 2 μg/L Cu) and contaminated zone (101± 12 μg/L Cu). These treatments were distributed in the HeMHAS forming three different scenarios: one as a linear gradient and two scenarios simulating heterogeneous pollution patches. In the control trials the organisms did not show preference for any of the zones. In very marked pollution scenarios (gradient), shrimp are able to avoid and select less disturbed areas, while in more heterogeneous environments (patches), it is highly relevant to conserve clean areas, which represent buffer areas in the face of contamination.
[EN] This work evaluated the habitat selection response by the shrimp Atyaephyra desmarestii, exposed to different concentrations of copper, verifying simultaneously if the heterogeneous distribution of the levels of contaminant and the connectivity between habitats could generate a random population distribution similar to metapopulation arrangement. The ssays were performed in the HeMHAS ( Heterogeneous Multi-Habitat Assay System), an non-forced exposure system, establishing three treatments: reference zone (26± 7 μg/L Cu), mixing zone (61± 2 μg/L Cu) and contaminated zone (101± 12 μg/L Cu). These treatments were distributed in the HeMHAS forming three different scenarios: one as a linear gradient and two scenarios simulating heterogeneous pollution patches. In the control trials the organisms did not show preference for any of the zones. In very marked pollution scenarios (gradient), shrimp are able to avoid and select less disturbed areas, while in more heterogeneous environments (patches), it is highly relevant to conserve clean areas, which represent buffer areas in the face of contamination.