Elevated standard metabolic rate in a freshwater shrimp (Palaemonetes paludosus) exposed to trace element-rich coal combustion waste
| Autor: | Christopher L. Rowe |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
animal structures
Palaemonetes paludosus biology Physiology Ecology business.industry Freshwater shrimp fungi technology industry and agriculture Coal combustion products respiratory system biology.organism_classification complex mixtures Biochemistry Crustacean Shrimp Environmental chemistry Fly ash Coal business Molecular Biology Palaemonetes |
| Zdroj: | Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology. 121:299-304 |
| ISSN: | 1095-6433 |
| DOI: | 10.1016/s1095-6433(98)10141-1 |
| Popis: | I conducted a transplant experiment to determine whether standard metabolic rate (SMR) of a freshwater shrimp (Palaemonetes paludosus) would be affected by exposure to trace element-enriched coal combustion waste (`coal ash'). Shrimp were transplanted into replicate cages in a coal ash-polluted site and a reference site for 8 months. The coal ash-polluted site was characterized by elevated sediment concentrations of As, Cd, Cr, Cu, Ni, Pb, and Se compared to sediments in the reference site. After 8 months in the study sites, shrimp in the polluted site appeared to have accumulated As, Cd, and Se from the habitat, but there were no differences in survival between the study sites. However, mean SMR of shrimp (measured as O2 consumption at rest) held in the polluted site was 51% higher than mean SMR of shrimp held in the reference site. The elevation in SMR indicates that the energetic costs of maintenance are greater for shrimp chronically exposed to the coal-ash polluted environment than shrimp in the reference site. It is likely, therefore, that other physiological or behavioral processes may be modified in the pollution-exposed individuals to compensate for the increased energy demands for maintenance. Recent studies have reported similar elevations in SMR in an amphibian and a reptile chronically exposed to coal ash. Analogous physiological responses in such taxonomically diverse animals (a crustacean, an amphibian, and a reptile) indicate that elevated SMR may be a general response by many types of organisms exposed to the mixture of trace elements characteristic of coal ash. The relationships among pollution-induced elevations in maintenance expenditures, long-term health of individuals, and population-level parameters require further attention. |
| Databáze: | OpenAIRE |
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