Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size
Surveys of terrestrial microinvertebrate morphometry, especially spatial patterns of body size at wider geographical scales, including the polar regions, are very scarce. In this study, we focused on Tardigrada, common limno-terrestrial microinvertebrates. Considering Bergmann’s rule, originally for...
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Norwegian Polar Institute
2018
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Online Access: | https://doi.org/10.1080/17518369.2018.1492297 https://doaj.org/article/6fe46c30bec44804b3b1bd95366bdd1e |
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ftdoajarticles:oai:doaj.org/article:6fe46c30bec44804b3b1bd95366bdd1e 2023-05-15T15:00:35+02:00 Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size Krzysztof Zawierucha Paweł Podkowa Martyna Marciniak Piotr Gąsiorek Katarzyna Zmudczyńska-Skarbek Karel Janko Maria Włodarska-Kowalczuk 2018-01-01T00:00:00Z https://doi.org/10.1080/17518369.2018.1492297 https://doaj.org/article/6fe46c30bec44804b3b1bd95366bdd1e EN eng Norwegian Polar Institute http://dx.doi.org/10.1080/17518369.2018.1492297 https://doaj.org/toc/1751-8369 1751-8369 doi:10.1080/17518369.2018.1492297 https://doaj.org/article/6fe46c30bec44804b3b1bd95366bdd1e Polar Research, Vol 37, Iss 1 (2018) Arctic Bergmann’s rule body length ectotherms latitudinal patterns temperature gradient Environmental sciences GE1-350 Oceanography GC1-1581 article 2018 ftdoajarticles https://doi.org/10.1080/17518369.2018.1492297 2022-12-31T08:43:55Z Surveys of terrestrial microinvertebrate morphometry, especially spatial patterns of body size at wider geographical scales, including the polar regions, are very scarce. In this study, we focused on Tardigrada, common limno-terrestrial microinvertebrates. Considering Bergmann’s rule, originally formulated for endothermic animals, we tested the hypothesis that body length of limno-terrestrial tardigrades augments with increasing latitude and decreasing temperature. Since some of our sampling areas adjoined seabird colonies, we also explored the effects of nutrients from seabird guano deposits. Individual body length of Testechiniscus spitsbergensis was measured in populations obtained from seven localities distributed along a latitudinal gradient extending from 45°N (northern Italy) to 80°N (northern Svalbard), and for Pilatobius recamieri from three localities in Svalbard (77°N-80°N). Considering both latitude and proximity to a seabird colony there were significant effects of locality on the body length of T. spitsbergensis; however, no clear pattern of increasing individual body size with increasing latitude could be detected. Immense differences in body size may be a signal for cryptic species diversity within this genus. No effect of latitude, or proximity to a seabird colony, on the body length of Arctic populations of P. recamieri was documented. Evidently, there is no tendency towards body size increase along the latitudinal gradient in either T. spitsbergensis or P. recamieri. Our study, and recent literature, indicates that larger body size in polar regions reported for several groups of micro-fauna may be a taxon-dependent response, and cannot be taken as a universally applicable rule for limno-terrestrial animals. Article in Journal/Newspaper Arctic Polar Research Svalbard Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Guano ENVELOPE(141.604,141.604,-66.775,-66.775) Polar Research 37 1 1492297 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic Bergmann’s rule body length ectotherms latitudinal patterns temperature gradient Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
Arctic Bergmann’s rule body length ectotherms latitudinal patterns temperature gradient Environmental sciences GE1-350 Oceanography GC1-1581 Krzysztof Zawierucha Paweł Podkowa Martyna Marciniak Piotr Gąsiorek Katarzyna Zmudczyńska-Skarbek Karel Janko Maria Włodarska-Kowalczuk Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size |
topic_facet |
Arctic Bergmann’s rule body length ectotherms latitudinal patterns temperature gradient Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
Surveys of terrestrial microinvertebrate morphometry, especially spatial patterns of body size at wider geographical scales, including the polar regions, are very scarce. In this study, we focused on Tardigrada, common limno-terrestrial microinvertebrates. Considering Bergmann’s rule, originally formulated for endothermic animals, we tested the hypothesis that body length of limno-terrestrial tardigrades augments with increasing latitude and decreasing temperature. Since some of our sampling areas adjoined seabird colonies, we also explored the effects of nutrients from seabird guano deposits. Individual body length of Testechiniscus spitsbergensis was measured in populations obtained from seven localities distributed along a latitudinal gradient extending from 45°N (northern Italy) to 80°N (northern Svalbard), and for Pilatobius recamieri from three localities in Svalbard (77°N-80°N). Considering both latitude and proximity to a seabird colony there were significant effects of locality on the body length of T. spitsbergensis; however, no clear pattern of increasing individual body size with increasing latitude could be detected. Immense differences in body size may be a signal for cryptic species diversity within this genus. No effect of latitude, or proximity to a seabird colony, on the body length of Arctic populations of P. recamieri was documented. Evidently, there is no tendency towards body size increase along the latitudinal gradient in either T. spitsbergensis or P. recamieri. Our study, and recent literature, indicates that larger body size in polar regions reported for several groups of micro-fauna may be a taxon-dependent response, and cannot be taken as a universally applicable rule for limno-terrestrial animals. |
format |
Article in Journal/Newspaper |
author |
Krzysztof Zawierucha Paweł Podkowa Martyna Marciniak Piotr Gąsiorek Katarzyna Zmudczyńska-Skarbek Karel Janko Maria Włodarska-Kowalczuk |
author_facet |
Krzysztof Zawierucha Paweł Podkowa Martyna Marciniak Piotr Gąsiorek Katarzyna Zmudczyńska-Skarbek Karel Janko Maria Włodarska-Kowalczuk |
author_sort |
Krzysztof Zawierucha |
title |
Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size |
title_short |
Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size |
title_full |
Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size |
title_fullStr |
Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size |
title_full_unstemmed |
Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size |
title_sort |
temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial tardigrada (testechiniscus spitsbergensis and pilatobius recamieri) body size |
publisher |
Norwegian Polar Institute |
publishDate |
2018 |
url |
https://doi.org/10.1080/17518369.2018.1492297 https://doaj.org/article/6fe46c30bec44804b3b1bd95366bdd1e |
long_lat |
ENVELOPE(141.604,141.604,-66.775,-66.775) |
geographic |
Arctic Svalbard Guano |
geographic_facet |
Arctic Svalbard Guano |
genre |
Arctic Polar Research Svalbard |
genre_facet |
Arctic Polar Research Svalbard |
op_source |
Polar Research, Vol 37, Iss 1 (2018) |
op_relation |
http://dx.doi.org/10.1080/17518369.2018.1492297 https://doaj.org/toc/1751-8369 1751-8369 doi:10.1080/17518369.2018.1492297 https://doaj.org/article/6fe46c30bec44804b3b1bd95366bdd1e |
op_doi |
https://doi.org/10.1080/17518369.2018.1492297 |
container_title |
Polar Research |
container_volume |
37 |
container_issue |
1 |
container_start_page |
1492297 |
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