Do Mining Activities Significantly Affect Feeding Behavior of Freshwater Benthic Macroinvertebrates? A Case Study in South Sardinia (Italy)
| Autor: | Maurizio Pinna, Alberto Basset, Monia Renzi |
|---|---|
| Přispěvatelé: | Basset, Alberto, Pinna, Maurizio, Renzi, Monia |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Pollution media_common.quotation_subject 010501 environmental sciences Alder leave 01 natural sciences Mayfly Water pollution Detritivore macroinvertebrate 0105 earth and related environmental sciences Water Science and Technology Invertebrate Trophic level media_common Detritus Water contamination Chemical contaminants Microbial conditioning Alder leaves Detritivore macroinvertebrates Streams biology Ecology 010604 marine biology & hydrobiology Chemical contaminants Detritivore macroinvertebrates Chemical contaminant Geotechnical Engineering and Engineering Geology biology.organism_classification Alder leaves Benthic zone Streams Environmental chemistry Microbial conditioning Water quality Water contamination |
| Zdroj: | Mine Water and the Environment. 36:239-247 |
| ISSN: | 1616-1068 1025-9112 |
| DOI: | 10.1007/s10230-017-0432-x |
| Popis: | We investigated the cascading effects of chemical contaminants on alder leaf detritus quality and the exploitation of this feeding resource by benthic macroinvertebrates (isopods, gastropods, and mayfly nymphs). Trophic behavior and energetics of benthic macroinvertebrates were used to evaluate the effects of contaminants on detritus exploitation. A two-way factorial nested experimental design was used to statistically quantify how leaf detritus origin (polluted and unpolluted streams) and the pollution level of the site selected for microbial conditioning of the detritus could affect the feeding resource quality for aquatic benthic macroinvertebrates, as measured by their trophic behavior (i.e. food selection) and exploitation (i.e. food ingestion). Alder leaves collected from a polluted stream in a former mining area (South-Sardinia, Italy) had Cd, Pb, and Zn concentrations up to 10 times that of leaves collected from an unpolluted stream. When benthic macroinvertebrates were given the option to choose, they all selected leaves from the unpolluted stream and/or those conditioned in the unpolluted stream. Ingestion rates were also significantly affected by both considered factors: leaf origin and conditioning. In addition, synergistic effects strongly increased the chemical contaminant stress on the leaf detritus quality. These results show that the terrestrial component of land–water ecotones affected by mining can be a relevant indirect pathway of chemical stress to benthic macroinvertebrate species. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink