Thriving in extremes : Local adaptation of grasses (Poaceae) to geothermally heated soils on a subarctic island
Temperature is one of the most decisive parameters when it comes to determining characteristics and distributions of life worldwide. For plants, as sessile organisms, it is particularly important to be able to deal with the temperatures they are exposed to at a given location. To understand evolutio...
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Stockholms universitet, Institutionen för ekologi, miljö och botanik
2023
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ftstockholmuniv:oai:DiVA.org:su-222154 2023-11-12T04:19:16+01:00 Thriving in extremes : Local adaptation of grasses (Poaceae) to geothermally heated soils on a subarctic island Nuppenau, Jan-Niklas 2023 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-222154 eng eng Stockholms universitet, Institutionen för ekologi, miljö och botanik Stockholm : Department of Ecology, Environment and Plant Sciences, Stockholm University orcid:0000-0002-1118-8139 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-222154 urn:isbn:978-91-8014-532-9 urn:isbn:978-91-8014-533-6 info:eu-repo/semantics/openAccess abiotic stress Agrostis cold colonization history common garden extreme environments Festuca frost ice encasement Iceland heat overwintering phenology plastome snown thermal tolerance Botany Botanik Ecology Ekologi Evolutionary Biology Evolutionsbiologi Doctoral thesis, comprehensive summary info:eu-repo/semantics/doctoralThesis text 2023 ftstockholmuniv 2023-11-01T23:31:40Z Temperature is one of the most decisive parameters when it comes to determining characteristics and distributions of life worldwide. For plants, as sessile organisms, it is particularly important to be able to deal with the temperatures they are exposed to at a given location. To understand evolutionary processes in plants, it is therefore crucial to gain knowledge about how plants deal with extreme temperatures and respond to changes in temperature. Such knowledge is especially needed given the ongoing rise in temperature under climate change. However, investigations in natural systems on how plants cope with opposing temperature extremes and the effect of long term heating are scarce. In Iceland, a subarctic island in the North Atlantic, a limited number of plant species grow on geothermally heated soils and non-heated soils alike. This constitutes a fascinating natural laboratory for studying local adaptations to opposing temperature extremes and especially constant warming. In my thesis, I investigated responses to geothermal heating in three grass species: Agrostis stolonifera and Agrostis vinealis, which are among the few vascular plants growing on the most heated soils, and Festuca rubra, which grows on moderately heated soils. First, I reconstructed phylogenetic relationships among Icelandic populations of A. stolonifera and A. vinealis and accessions across both species distribution ranges (Paper I). For A. stolonifera, but not for A. vinealis, I found a distinct geothermal lineage, which is not the closest relative of non-thermal populations. In a subsequent test of thermal tolerance for the geothermal lineage of A. stolonifera, I found no difference in survival following cold treatment, but geothermal plants survived exposure to higher temperatures. However, geothermal plants overall performed worse at colder conditions, which indicates a trade-off between heat tolerance and performance at colder temperatures (Paper II). Comparing survival ability and flowering phenology of the geothermal and ... Doctoral or Postdoctoral Thesis Iceland North Atlantic Subarctic Stockholm University: Publications (DiVA) |
institution |
Open Polar |
collection |
Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
abiotic stress Agrostis cold colonization history common garden extreme environments Festuca frost ice encasement Iceland heat overwintering phenology plastome snown thermal tolerance Botany Botanik Ecology Ekologi Evolutionary Biology Evolutionsbiologi |
spellingShingle |
abiotic stress Agrostis cold colonization history common garden extreme environments Festuca frost ice encasement Iceland heat overwintering phenology plastome snown thermal tolerance Botany Botanik Ecology Ekologi Evolutionary Biology Evolutionsbiologi Nuppenau, Jan-Niklas Thriving in extremes : Local adaptation of grasses (Poaceae) to geothermally heated soils on a subarctic island |
topic_facet |
abiotic stress Agrostis cold colonization history common garden extreme environments Festuca frost ice encasement Iceland heat overwintering phenology plastome snown thermal tolerance Botany Botanik Ecology Ekologi Evolutionary Biology Evolutionsbiologi |
description |
Temperature is one of the most decisive parameters when it comes to determining characteristics and distributions of life worldwide. For plants, as sessile organisms, it is particularly important to be able to deal with the temperatures they are exposed to at a given location. To understand evolutionary processes in plants, it is therefore crucial to gain knowledge about how plants deal with extreme temperatures and respond to changes in temperature. Such knowledge is especially needed given the ongoing rise in temperature under climate change. However, investigations in natural systems on how plants cope with opposing temperature extremes and the effect of long term heating are scarce. In Iceland, a subarctic island in the North Atlantic, a limited number of plant species grow on geothermally heated soils and non-heated soils alike. This constitutes a fascinating natural laboratory for studying local adaptations to opposing temperature extremes and especially constant warming. In my thesis, I investigated responses to geothermal heating in three grass species: Agrostis stolonifera and Agrostis vinealis, which are among the few vascular plants growing on the most heated soils, and Festuca rubra, which grows on moderately heated soils. First, I reconstructed phylogenetic relationships among Icelandic populations of A. stolonifera and A. vinealis and accessions across both species distribution ranges (Paper I). For A. stolonifera, but not for A. vinealis, I found a distinct geothermal lineage, which is not the closest relative of non-thermal populations. In a subsequent test of thermal tolerance for the geothermal lineage of A. stolonifera, I found no difference in survival following cold treatment, but geothermal plants survived exposure to higher temperatures. However, geothermal plants overall performed worse at colder conditions, which indicates a trade-off between heat tolerance and performance at colder temperatures (Paper II). Comparing survival ability and flowering phenology of the geothermal and ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Nuppenau, Jan-Niklas |
author_facet |
Nuppenau, Jan-Niklas |
author_sort |
Nuppenau, Jan-Niklas |
title |
Thriving in extremes : Local adaptation of grasses (Poaceae) to geothermally heated soils on a subarctic island |
title_short |
Thriving in extremes : Local adaptation of grasses (Poaceae) to geothermally heated soils on a subarctic island |
title_full |
Thriving in extremes : Local adaptation of grasses (Poaceae) to geothermally heated soils on a subarctic island |
title_fullStr |
Thriving in extremes : Local adaptation of grasses (Poaceae) to geothermally heated soils on a subarctic island |
title_full_unstemmed |
Thriving in extremes : Local adaptation of grasses (Poaceae) to geothermally heated soils on a subarctic island |
title_sort |
thriving in extremes : local adaptation of grasses (poaceae) to geothermally heated soils on a subarctic island |
publisher |
Stockholms universitet, Institutionen för ekologi, miljö och botanik |
publishDate |
2023 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-222154 |
genre |
Iceland North Atlantic Subarctic |
genre_facet |
Iceland North Atlantic Subarctic |
op_relation |
orcid:0000-0002-1118-8139 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-222154 urn:isbn:978-91-8014-532-9 urn:isbn:978-91-8014-533-6 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1782335759095693312 |