Crude oil exposure reduces ice algal growth in a sea-ice mesocosm experiment
| العنوان: | Crude oil exposure reduces ice algal growth in a sea-ice mesocosm experiment |
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| المؤلفون: | Kyle Dilliplaine, Bodil A. Bluhm, Rolf Gradinger, Marc Oggier, R. Eric Collins, Hajo Eicken |
| المصدر: | Polar Biology. 44:525-537 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 0106 biological sciences, Pollution, geography, geography.geographical_feature_category, biology, Nitzschia, 010604 marine biology & hydrobiology, media_common.quotation_subject, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, Mesocosm, Diatom, Arctic, Algae, Environmental chemistry, Sea ice, General Agricultural and Biological Sciences, Oil toxicity, media_common |
| الوصف: | This version of the article has been accepted for publication, after peer review and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at https://doi.org/10.1007/s00300-021-02818-3. Oil production in Arctic ice-covered areas poses a risk for pollution of the ecosystem including that within the brine channel network of sea ice. Sea-ice autotrophs contribute substantially to Arctic primary production, but are inherently difficult to test for oil exposure responses in situ. This study had two objectives, first, we developed a suitable lab-based mesocosm system, second, we tested oil effects on sea-ice algae. Specifically, we investigated if Alaska North Slope crude oil exposure reduces ice algal abundance, biomass and concentration of extracellular polymeric substances (EPS) using indoor ice tanks over a 10-day exposure period. Six tanks in one cold room were used in pairs for the following treatments: (1) control, (2) oil release as a layer under ice and (3) release of dispersed oil. All tanks were inoculated with sea-ice microbial communities collected from Utqiaġvik, Alaska. After 10 days of exposure, the abundance of algae, dominated by the pennate diatom genus Nitzschia, and the concentrations of EPS and chlorophyll a were significantly lower in the oiled treatments compared to the control. We suggest light attenuation by the oil, reduced algal mobility, and oil toxicity as causes for this reduction. Observed changes in cell fluorescence characteristics based on DNA staining could be linked to the oil exposure and could provide a new tool for assessment of toxicity in microalgae. |
| تدمد: | 1432-2056 0722-4060 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bd40bea0394795764f8fdfc2fe8f66e https://doi.org/10.1007/s00300-021-02818-3 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....7bd40bea0394795764f8fdfc2fe8f66e |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 14322056 07224060 |
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