The Role of Copper Accumulations on Leaves in the Inhibition of Leaf Decomposition in a Mountain Stream
| Autor: | Albert C. Hendricks, Alicia S. Schultheis |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Journal of Freshwater Ecology. 14:31-40 |
| ISSN: | 2156-6941 0270-5060 |
| DOI: | 10.1080/02705060.1999.9663652 |
| Popis: | We investigated the roles of copper accumulated on leaves and in-stream copper concentrations in the inhibition of leaf decomposition in a copper-contaminated stream before and after treatment with a wetland passive treatment system. While post-treatment copper accumulations on leaves (CuL) were significantly related to in-stream copper concentrations (r2=0.42, p=0.0026), CuL were not important determinants of the decomposition rate (r2=0.00053, p=0.92) or shredder abundance in leaf bags (r2 = 0.003, p = 0.82), indicating that the inhibition of the decomposition rate in our study was not a response to CuL However, in a step-wise regression model that included leaf decomposition, CuL, in-stream copper concentrations, and shredders, in-stream copper concentration was the only significant effect and explained the most variation in the decomposition rate (r2 =0.23, p = 0.02). The inhibition of leaf decomposition was a response to high (>10 μg/L) in-stream copper concentrations rather than CuL Since i... |
| Databáze: | OpenAIRE |
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