Persistence of chironomids in metal polluted Andean high altitude streams: does melanin play a role?
| Autor: | Jenny K. Marticorena-Ruiz, Milo L. de Baat, Edwin J. Palomino, Maarten van Gemert, Wim Admiraal, Michiel H. S. Kraak, Rudo A. Verweij, Camille Merritt, Raúl A. Loayza-Muro |
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| Přispěvatelé: | Aquatic Environmental Ecology (IBED, FNWI), Animal Ecology, Amsterdam Global Change Institute |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Ultraviolet Rays
ved/biology.organism_classification_rank.species STREAMS purl.org/pe-repo/ocde/ford#1.05.08 [https] Chironomidae Persistence (computer science) Melanin Altitude Rivers Peru Environmental Chemistry Animals Water Pollutants Chironomus riparius Melanins Larva biology Ecology ved/biology General Chemistry Effects of high altitude on humans biology.organism_classification Metals Environmental chemistry Chemical toxicity Water Pollutants Chemical |
| Zdroj: | Environmental Science and Technology, 47(1), 601-607. American Chemical Society Environmental Science and Technology, 47, 601-607. American Chemical Society Loayza-Muro, R A, Marticorena-Ruiz, J K, Palomino, E J, Merritt, C, de Baat, M L, van Gemert, M, Verweij, R A, Kraak, M H S & Admiraal, W 2013, ' Persistence of chironomids in metal polluted Andean high altitude streams: does melanin play a role? ', Environmental Science and Technology, vol. 47, pp. 601-607 . https://doi.org/10.1021/es302779b |
| ISSN: | 0013-936X |
| Popis: | In high altitude Andean streams an intense solar radiation and coinciding metal pollution allow the persistence of only a few specialized taxa, including chironomids. The aim of the present study was therefore to determine the mechanisms underlying the persistence of chironomids under these multiple stress conditions, hypothesizing that melanin counteracts both the adverse effects of solar radiation and of metals. Melanin was determined in chironomids from reference and metal polluted streams at 3000 and 4000 m altitude, being 2-fold higher at 4000 m compared to 3000 m, and 2-fold higher in polluted streams than in reference streams at both altitudes. The field observations were experimentally verified by assessing the combined effects of Cu and UV-B on the survival and melanin concentration in larvae of the model species Chironomus riparius (Chironomidae, Diptera). In laboratory exposures, the highest melanin concentrations were found in larvae surviving toxic Cu concentrations, but not in those exposed to the highest UV-B radiation. Pre-exposure to UV-B decreased the sensitivity of the larvae to UV-B and to Cu+UV-B. It is concluded that in the field, melanin may protect chironomids partially against both elevated metal concentrations and solar radiation, allowing them to persist under the harshest conditions in high altitude streams. © 2012 American Chemical Society. |
| Databáze: | OpenAIRE |
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