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Age differential response of Hyalella curvispina to a cadmium pulse: influence of sediment particle size.

Abstract：

:In Argentina periurban streams frequently receive agricultural, livestock and industrial discharges. Heavy metals have been found in the water column and sediments of numerous water bodies of the pampean region, at levels above the limits established for aquatic life protection. This study aimed to evaluate the effect of a contaminant pulse of cadmium discharged into a water-sediment system of different particle sizes, by means of laboratory tests using juveniles and adults of Hyalella curvispina, a native amphipod. We found that the substrate particle size was a determining factor in the toxicity of cadmium and that the adults of H. curvispina were more sensitive than juveniles. We also observed a temporal difference between the two ages for the same type of sediment. Given the nature of the sediments of regional water bodies, it is expected that a discharge of cadmium, even at concentrations as low as those tested here, will affect the survival of native amphipods.

journal_name

Ecotoxicol Environ Saf

journal_title

Ecotoxicology and environmental safety

authors

García ME,Rodrígues Capítulo A,Ferrari L

doi

10.1016/j.ecoenv.2012.03.017

subject

Has Abstract

pub_date

2012-06-01 00:00:00

pages

314-20

eissn

0147-6513

issn

1090-2414

pii

S0147-6513(12)00104-2

journal_volume

80

pub_type

杂志文章

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