Field metabolic rate and PCB adipose tissue deposition efficiency in East Greenland polar bears derived from contaminant monitoring data
| Autor: | Robert J. Letcher, Jens-Christian Svenning, Katrin Vorkamp, Christian Sonne, Jacob Nabe-Nielsen, Viola Pavlova, Rune Dietz, Frank Rigét, Volker Grimm |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
0106 biological sciences
Conservation of Natural Resources Computer and Information Sciences Bioenergetics Ursus maritimus Climate Change Greenland lcsh:Medicine 010501 environmental sciences Systems Science 010603 evolutionary biology 01 natural sciences Eating chemistry.chemical_compound Agent-Based Modeling biology.animal Food Chains Animals lcsh:Science Institut für Biochemie und Biologie 0105 earth and related environmental sciences Chemical Ecology Multidisciplinary Ecology biology lcsh:R Ecology and Environmental Sciences Marine Ecology Biology and Life Sciences Polychlorinated biphenyl Feeding Behavior Models Theoretical Polychlorinated Biphenyls Deposition (aerosol physics) Congener Adipose Tissue chemistry 13. Climate action Field metabolic rate Basal metabolic rate Polar lcsh:Q Basal Metabolism Population Ecology Ursidae Environmental Monitoring Research Article Computer Modeling |
| Zdroj: | Pavlova, V, Nabe-Nielsen, J, Dietz, R, Svenning, J-C, Vorkamp, K, Rigét, F F, Sonne, C, Letcher, R J & Grimm, V 2014, ' Field Metabolic Rate and PCB Adipose Tissue Deposition Efficiency in East Greenland Polar Bears Derived from Contaminant Monitoring Data ', PLOS ONE, vol. 9, no. 8, pp. e104037 . https://doi.org/10.1371/journal.pone.0104037 PLoS ONE PLoS ONE, Vol 9, Iss 8, p e104037 (2014) |
| DOI: | 10.1371/journal.pone.0104037 |
| Popis: | Climate change will increasingly affect the natural habitat and diet of polar bears (Ursus maritimus). Understanding the energetic needs of polar bears is therefore important. We developed a theoretical method for estimating polar bear food consumption based on using the highly recalcitrant polychlorinated biphenyl (PCB) congener, 2,2',4,4',55-hexaCB (CB153) in bear adipose tissue as an indicator of food intake. By comparing the CB153 tissue concentrations in wild polar bears with estimates from a purposely designed individual-based model, we identified the possible combinations of field metabolic rates (FMR) and CB153 deposition efficiencies in East Greenland polar bears. Our simulations indicate that if 30% of the CB153 consumed by polar bear individuals were deposited into their adipose tissue, the corresponding FMR would be only two times the basal metabolic rate. In contrast, if the modelled CB153 deposition efficiency were 10%, adult polar bears would require six times more energy than that needed to cover basal metabolism. This is considerably higher than what has been assumed for polar bears in previous studies though it is similar to FMRs found in other marine mammals. An implication of this result is that even relatively small reductions in future feeding opportunities could impact the survival of East Greenland polar bears. |
| Databáze: | OpenAIRE |
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