Thermal limits of krill species from the high-Arctic Kongsfjord (Spitsbergen)
The high-Arctic Kongsfjord is influenced mainly by cold Arctic water but also by warmer Atlantic water masses. In recent years, the proportion of the Atlantic inflow from the south has increased. Concurrently, one temperate-boreal (Meganyctiphanes norvegica) and one subtropical-temperate (Nematoscel...
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Online Access: | https://epic.awi.de/id/eprint/38464/ http://www.int-res.com/abstracts/meps/v535/p89-98/ https://hdl.handle.net/10013/epic.46012 |
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ftawi:oai:epic.awi.de:38464 2024-09-15T17:50:42+00:00 Thermal limits of krill species from the high-Arctic Kongsfjord (Spitsbergen) Hünerlage, Kim Buchholz, Friedrich 2015 https://epic.awi.de/id/eprint/38464/ http://www.int-res.com/abstracts/meps/v535/p89-98/ https://hdl.handle.net/10013/epic.46012 unknown Inter Research Hünerlage, K. and Buchholz, F. (2015) Thermal limits of krill species from the high-Arctic Kongsfjord (Spitsbergen) , Marine Ecology Progress Series, 535 , pp. 89-98 . doi:10.3354/meps11408 <https://doi.org/10.3354/meps11408> , hdl:10013/epic.46012 EPIC3Marine Ecology Progress Series, Inter Research, 535, pp. 89-98 Article isiRev 2015 ftawi https://doi.org/10.3354/meps11408 2024-06-24T04:12:21Z The high-Arctic Kongsfjord is influenced mainly by cold Arctic water but also by warmer Atlantic water masses. In recent years, the proportion of the Atlantic inflow from the south has increased. Concurrently, one temperate-boreal (Meganyctiphanes norvegica) and one subtropical-temperate (Nematoscelis megalops) krill species are now regularly found in the Kongsfjord, in addition to the previously prevailing arcto-boreal species Thysanoessa inermis and T. raschii. In view of the recent changes in these species’ biogeographic distributions, we compared their physiological tolerances. Using non-invasive optical oxygen sensors, respiration measurements served to characterize metabolic responses to temperature variations. Thysanoessa spp. appear more cold-stenotherm than the other 2 krill species: the upper level of respiratory capacity is reached at 12°C and they are less tolerant to decreasing oxygen concentrations. This finding is consistent with their arcto-boreal distribution. In contrast, M. norvegica and N. megalops showed a higher tolerance to temperature changes, a robust nutritional condition and sexual maturity. Such physiological plasticity may explain the recent northward expansion of their geographic range. Article in Journal/Newspaper Arctic Kongsfjord* Meganyctiphanes norvegica Spitsbergen Thysanoessa inermis Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Marine Ecology Progress Series 535 89 98 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The high-Arctic Kongsfjord is influenced mainly by cold Arctic water but also by warmer Atlantic water masses. In recent years, the proportion of the Atlantic inflow from the south has increased. Concurrently, one temperate-boreal (Meganyctiphanes norvegica) and one subtropical-temperate (Nematoscelis megalops) krill species are now regularly found in the Kongsfjord, in addition to the previously prevailing arcto-boreal species Thysanoessa inermis and T. raschii. In view of the recent changes in these species’ biogeographic distributions, we compared their physiological tolerances. Using non-invasive optical oxygen sensors, respiration measurements served to characterize metabolic responses to temperature variations. Thysanoessa spp. appear more cold-stenotherm than the other 2 krill species: the upper level of respiratory capacity is reached at 12°C and they are less tolerant to decreasing oxygen concentrations. This finding is consistent with their arcto-boreal distribution. In contrast, M. norvegica and N. megalops showed a higher tolerance to temperature changes, a robust nutritional condition and sexual maturity. Such physiological plasticity may explain the recent northward expansion of their geographic range. |
format |
Article in Journal/Newspaper |
author |
Hünerlage, Kim Buchholz, Friedrich |
spellingShingle |
Hünerlage, Kim Buchholz, Friedrich Thermal limits of krill species from the high-Arctic Kongsfjord (Spitsbergen) |
author_facet |
Hünerlage, Kim Buchholz, Friedrich |
author_sort |
Hünerlage, Kim |
title |
Thermal limits of krill species from the high-Arctic Kongsfjord (Spitsbergen) |
title_short |
Thermal limits of krill species from the high-Arctic Kongsfjord (Spitsbergen) |
title_full |
Thermal limits of krill species from the high-Arctic Kongsfjord (Spitsbergen) |
title_fullStr |
Thermal limits of krill species from the high-Arctic Kongsfjord (Spitsbergen) |
title_full_unstemmed |
Thermal limits of krill species from the high-Arctic Kongsfjord (Spitsbergen) |
title_sort |
thermal limits of krill species from the high-arctic kongsfjord (spitsbergen) |
publisher |
Inter Research |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/38464/ http://www.int-res.com/abstracts/meps/v535/p89-98/ https://hdl.handle.net/10013/epic.46012 |
genre |
Arctic Kongsfjord* Meganyctiphanes norvegica Spitsbergen Thysanoessa inermis |
genre_facet |
Arctic Kongsfjord* Meganyctiphanes norvegica Spitsbergen Thysanoessa inermis |
op_source |
EPIC3Marine Ecology Progress Series, Inter Research, 535, pp. 89-98 |
op_relation |
Hünerlage, K. and Buchholz, F. (2015) Thermal limits of krill species from the high-Arctic Kongsfjord (Spitsbergen) , Marine Ecology Progress Series, 535 , pp. 89-98 . doi:10.3354/meps11408 <https://doi.org/10.3354/meps11408> , hdl:10013/epic.46012 |
op_doi |
https://doi.org/10.3354/meps11408 |
container_title |
Marine Ecology Progress Series |
container_volume |
535 |
container_start_page |
89 |
op_container_end_page |
98 |
_version_ |
1810292507999731712 |