Countergradient variation and compensatory growth in Moor frog (Rana arvalis) along a replicated latitudinal gradient
For evolution to occur over time, it is necessary for animals and plants to show phenotypic variation. If the individuals within populations of a species do not show observable differences among themselves, there will be a lack of driving force for natural selection to act on and decide which charac...
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Uppsala universitet, Institutionen för biologisk grundutbildning
2022
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ftuppsalauniv:oai:DiVA.org:uu-488098 2023-05-15T17:45:12+02:00 Countergradient variation and compensatory growth in Moor frog (Rana arvalis) along a replicated latitudinal gradient Mallick, Sohini 2022 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-488098 eng eng Uppsala universitet, Institutionen för biologisk grundutbildning http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-488098 info:eu-repo/semantics/openAccess moor frog countergradient variation compensatory growth latitudinal gradient Ecology Ekologi Student thesis info:eu-repo/semantics/bachelorThesis text 2022 ftuppsalauniv 2023-02-23T22:01:08Z For evolution to occur over time, it is necessary for animals and plants to show phenotypic variation. If the individuals within populations of a species do not show observable differences among themselves, there will be a lack of driving force for natural selection to act on and decide which characteristic gets inherited from one generation to the next. It is hence important to study phenotypic variation, especially against environmental gradients such as latitude and altitude, which gives us an insight into the pattern of change according to essential factors such as temperature and length of seasons. The latter would impose time constraints on growing populations, leading to periods of unfavourable conditions limiting their growth and development. In many cases, such organisms would tend to compensate for the period of slow growth and catch up to the others that did not have to endure the same situation and grow to the same size as them. This study aims to find differences in three key larval life-history traits of the moor frog (Rana arvalis), namely metamorphic mass, larval period, and growth rate, and find what kind of pattern is observed in case of these phenotypic variations. It also aims to find differences in the strength of compensatory response between populations from lower and higher latitudes. A common garden experiment was conducted with populations originating from both sides of the Baltic Sea, ranging from southern Sweden and Latvia to central Finland and northern Sweden. It was expected that the northern populations would grow faster and show a countergradient variation pattern since they are faced with more strict time constraints at higher latitudes, but in most cases, we observed a co-gradient pattern, wherein the environmental effect amplifies the individual’s genetic predisposition instead of opposing it. We also observed a stronger compensatory response in the northern populations as compared to their southern counterparts. Effects of climate change and subsequent rise in temperatures ... Bachelor Thesis Northern Sweden Uppsala University: Publications (DiVA) |
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Uppsala University: Publications (DiVA) |
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language |
English |
topic |
moor frog countergradient variation compensatory growth latitudinal gradient Ecology Ekologi |
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moor frog countergradient variation compensatory growth latitudinal gradient Ecology Ekologi Mallick, Sohini Countergradient variation and compensatory growth in Moor frog (Rana arvalis) along a replicated latitudinal gradient |
topic_facet |
moor frog countergradient variation compensatory growth latitudinal gradient Ecology Ekologi |
description |
For evolution to occur over time, it is necessary for animals and plants to show phenotypic variation. If the individuals within populations of a species do not show observable differences among themselves, there will be a lack of driving force for natural selection to act on and decide which characteristic gets inherited from one generation to the next. It is hence important to study phenotypic variation, especially against environmental gradients such as latitude and altitude, which gives us an insight into the pattern of change according to essential factors such as temperature and length of seasons. The latter would impose time constraints on growing populations, leading to periods of unfavourable conditions limiting their growth and development. In many cases, such organisms would tend to compensate for the period of slow growth and catch up to the others that did not have to endure the same situation and grow to the same size as them. This study aims to find differences in three key larval life-history traits of the moor frog (Rana arvalis), namely metamorphic mass, larval period, and growth rate, and find what kind of pattern is observed in case of these phenotypic variations. It also aims to find differences in the strength of compensatory response between populations from lower and higher latitudes. A common garden experiment was conducted with populations originating from both sides of the Baltic Sea, ranging from southern Sweden and Latvia to central Finland and northern Sweden. It was expected that the northern populations would grow faster and show a countergradient variation pattern since they are faced with more strict time constraints at higher latitudes, but in most cases, we observed a co-gradient pattern, wherein the environmental effect amplifies the individual’s genetic predisposition instead of opposing it. We also observed a stronger compensatory response in the northern populations as compared to their southern counterparts. Effects of climate change and subsequent rise in temperatures ... |
format |
Bachelor Thesis |
author |
Mallick, Sohini |
author_facet |
Mallick, Sohini |
author_sort |
Mallick, Sohini |
title |
Countergradient variation and compensatory growth in Moor frog (Rana arvalis) along a replicated latitudinal gradient |
title_short |
Countergradient variation and compensatory growth in Moor frog (Rana arvalis) along a replicated latitudinal gradient |
title_full |
Countergradient variation and compensatory growth in Moor frog (Rana arvalis) along a replicated latitudinal gradient |
title_fullStr |
Countergradient variation and compensatory growth in Moor frog (Rana arvalis) along a replicated latitudinal gradient |
title_full_unstemmed |
Countergradient variation and compensatory growth in Moor frog (Rana arvalis) along a replicated latitudinal gradient |
title_sort |
countergradient variation and compensatory growth in moor frog (rana arvalis) along a replicated latitudinal gradient |
publisher |
Uppsala universitet, Institutionen för biologisk grundutbildning |
publishDate |
2022 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-488098 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-488098 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766148019205439488 |