Importance of freeze-thaw events in low temperature ecotoxicology of cold tolerant enchytraeids
Due to global warming it is predicted that freeze-thaw cycles will increase in Arctic and cold temperate regions. The effects of this variation becomes of particular ecological importance to freeze-tolerant species when it is combined with chemical pollutants. We compared the effect of control tempe...
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ftria:oai:ria.ua.pt:10773/22934 2023-05-15T15:07:20+02:00 Importance of freeze-thaw events in low temperature ecotoxicology of cold tolerant enchytraeids Patrício Silva, Ana L. Enggrob, Kirsten Slotsbo, Stine Amorim, Mónica J. B. Holmstrup, Martin 2014 http://hdl.handle.net/10773/22934 eng eng American Chemical Society info:eu-repo/grantAgreement/FCT/5876-PPCDTI/103719/PT info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F75209%2F2010/PT 0013-936X http://hdl.handle.net/10773/22934 10.1021/es502161z restrictedAccess article 2014 ftria 2022-05-25T18:35:44Z Due to global warming it is predicted that freeze-thaw cycles will increase in Arctic and cold temperate regions. The effects of this variation becomes of particular ecological importance to freeze-tolerant species when it is combined with chemical pollutants. We compared the effect of control temperature (2 °C), daily freeze-thaw cycles (2 to -4 °C) and constant freezing (-2 °C) temperatures on the cold-tolerance of oligochaete worms (Enchytraeus albidus) and tested how survival was influenced by pre-exposure to 4-nonylphenol (4-NP), a common nonionic detergent found in sewage sludge amended soils. Results showed that combined effect of 4-NP and daily freeze-thaw cycles can cause higher mortality to worms as compared with sustained freezing or control temperature. Exposure to 4-NP caused a substantial depletion of glycogen reserves which is catabolized during freezing to produce cryoprotective concentrations of free glucose. Further, exposure to freeze-thaw cycles resulted in higher concentrations of 4-NP in worm tissues as compared to constant freezing or control temperature (2 °C). Thus, worms exposed to combined effect of freeze-thaw cycles and 4-NP suffer higher consequences, with the toxic effect of the chemical potentiating the deleterious effects of freezing and thawing. Article in Journal/Newspaper Arctic Global warming Repositório Institucional da Universidade de Aveiro (RIA) Arctic |
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Repositório Institucional da Universidade de Aveiro (RIA) |
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English |
description |
Due to global warming it is predicted that freeze-thaw cycles will increase in Arctic and cold temperate regions. The effects of this variation becomes of particular ecological importance to freeze-tolerant species when it is combined with chemical pollutants. We compared the effect of control temperature (2 °C), daily freeze-thaw cycles (2 to -4 °C) and constant freezing (-2 °C) temperatures on the cold-tolerance of oligochaete worms (Enchytraeus albidus) and tested how survival was influenced by pre-exposure to 4-nonylphenol (4-NP), a common nonionic detergent found in sewage sludge amended soils. Results showed that combined effect of 4-NP and daily freeze-thaw cycles can cause higher mortality to worms as compared with sustained freezing or control temperature. Exposure to 4-NP caused a substantial depletion of glycogen reserves which is catabolized during freezing to produce cryoprotective concentrations of free glucose. Further, exposure to freeze-thaw cycles resulted in higher concentrations of 4-NP in worm tissues as compared to constant freezing or control temperature (2 °C). Thus, worms exposed to combined effect of freeze-thaw cycles and 4-NP suffer higher consequences, with the toxic effect of the chemical potentiating the deleterious effects of freezing and thawing. |
format |
Article in Journal/Newspaper |
author |
Patrício Silva, Ana L. Enggrob, Kirsten Slotsbo, Stine Amorim, Mónica J. B. Holmstrup, Martin |
spellingShingle |
Patrício Silva, Ana L. Enggrob, Kirsten Slotsbo, Stine Amorim, Mónica J. B. Holmstrup, Martin Importance of freeze-thaw events in low temperature ecotoxicology of cold tolerant enchytraeids |
author_facet |
Patrício Silva, Ana L. Enggrob, Kirsten Slotsbo, Stine Amorim, Mónica J. B. Holmstrup, Martin |
author_sort |
Patrício Silva, Ana L. |
title |
Importance of freeze-thaw events in low temperature ecotoxicology of cold tolerant enchytraeids |
title_short |
Importance of freeze-thaw events in low temperature ecotoxicology of cold tolerant enchytraeids |
title_full |
Importance of freeze-thaw events in low temperature ecotoxicology of cold tolerant enchytraeids |
title_fullStr |
Importance of freeze-thaw events in low temperature ecotoxicology of cold tolerant enchytraeids |
title_full_unstemmed |
Importance of freeze-thaw events in low temperature ecotoxicology of cold tolerant enchytraeids |
title_sort |
importance of freeze-thaw events in low temperature ecotoxicology of cold tolerant enchytraeids |
publisher |
American Chemical Society |
publishDate |
2014 |
url |
http://hdl.handle.net/10773/22934 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Global warming |
genre_facet |
Arctic Global warming |
op_relation |
info:eu-repo/grantAgreement/FCT/5876-PPCDTI/103719/PT info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F75209%2F2010/PT 0013-936X http://hdl.handle.net/10773/22934 10.1021/es502161z |
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restrictedAccess |
_version_ |
1766338866890932224 |