Uptake of cadmium by the seagrass Heterozostera tasmanica from Corio Bay and Western Port, Victoria
| Autor: | GJ Fabris, JE Harris, JD Smith |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
inorganic chemicals
Cadmium geography geography.geographical_feature_category Ecology Coral chemistry.chemical_element Sediment Estuary Aquatic Science Biology Oceanography biology.organism_classification Seagrass chemistry Algae Environmental chemistry Botany Seawater Bay Ecology Evolution Behavior and Systematics |
| Zdroj: | Marine and Freshwater Research. 33:829 |
| ISSN: | 1323-1650 |
| Popis: | Uptake of cadmium by leaves and root-rhizomes of the seagrass H. tasmanica was studied in laboratory and field experiments. In laboratory experiments, cadmium concentration in leaves approached constant levels after exposure for 192 h to dissolved cadmium at concentrations of 40 and 400�g I-1. Root-rhizomes, separated from leaves in a partitioned container: did not attain constant cadmium levels under similar conditions. Translocation of cadmium between the leaf and the root-rhizomes was not observed. In field experiments, H. tasmanica containing cadmium at concentrations of 1.8 and 0.4 �g g-1 in the leaves and root-rhizomes, respectively, and growing in sediment that did not contain measurable cadmium, concentrated that element principally in the leaves when transferred to seawater containing cadmium at concentrations of up to 1.8 �g I-1. Leaves and root-rhizomes initially containing cadmium at concentrations of 15 and 14 �g g-1, respectively, lost cadmium when transferred to seawater containing cadmium at less than 0.2 �g I-1. Approximately 70% of the cadmium accumulated by leaves of H. tasmanica was associated with solid cellular material, 20% with cell fluids and the remainder was sorbed on the leaf surfaces. |
| Databáze: | OpenAIRE |
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