Effect of growth temperature on photosynthetic capacity and respiration in three ecotypes of Eriophorum vaginatum
Ecotypic differentiation in the tussock‐forming sedge Eriophorum vaginatum has led to the development of populations that are locally adapted to climate in Alaska's moist tussock tundra. As a foundation species, E. vaginatum plays a central role in providing topographic and microclimatic variat...
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2018
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ftwestchesteruni:oai:digitalcommons.wcupa.edu:bio_facpub-1047 2023-06-11T04:09:46+02:00 Effect of growth temperature on photosynthetic capacity and respiration in three ecotypes of Eriophorum vaginatum Schedlbauer, Jessica L. Fetcher, Ned Hood, Katherine Moody, Michael L. Tang, Jianwu 2018-04-01T07:00:00Z application/pdf https://digitalcommons.wcupa.edu/bio_facpub/46 https://doi.org/10.1002/ece3.3939 https://digitalcommons.wcupa.edu/context/bio_facpub/article/1047/viewcontent/Schedlbauer_et_al_2018_Ecology_and_Evolution.pdf unknown Digital Commons @ West Chester University https://digitalcommons.wcupa.edu/bio_facpub/46 doi:10.1002/ece3.3939 https://digitalcommons.wcupa.edu/context/bio_facpub/article/1047/viewcontent/Schedlbauer_et_al_2018_Ecology_and_Evolution.pdf Biology Faculty Publications adaptational lag Eriophorum vaginatum moist tussock tundra photosynthetic capacity respiration temperature acclimation Ecology and Evolutionary Biology text 2018 ftwestchesteruni https://doi.org/10.1002/ece3.3939 2023-05-06T22:45:49Z Ecotypic differentiation in the tussock‐forming sedge Eriophorum vaginatum has led to the development of populations that are locally adapted to climate in Alaska's moist tussock tundra. As a foundation species, E. vaginatum plays a central role in providing topographic and microclimatic variation essential to these ecosystems, but a changing climate could diminish the importance of this species. As Arctic temperatures have increased, there is evidence of adaptational lag in E. vaginatum, as locally adapted ecotypes now exhibit reduced population growth rates. Whether there is a physiological underpinning to adaptational lag is unknown. Accordingly, this possibility was investigated in reciprocal transplant gardens. Tussocks of E. vaginatum from sites separated by ~1° latitude (Coldfoot: 67°15′N, Toolik Lake: 68°37′, Sagwon: 69°25′) were transplanted into the Toolik Lake and Sagwon sites and exposed to either an ambient or an experimental warming treatment. Five tussocks pertreatment combination were measured at each garden to determine photosynthetic capacity (i.e., Vcmax and Jmax) and dark respiration rate (Rd) at measurement temperatures of 15, 20, and 25°C. Photosynthetic enhancements or homeostasis were observed for all ecotypes at both gardens under increased growth temperature, indicating no negative effect of elevated temperature on photosynthetic capacity. Further, no evidence of thermal acclimation in Rd was observed for any ecotype, and there was little evidence of ecotypic variation in Rd. As such, no physiological contribution to adaptational lag was observed given the increase in growth temperature (up to ~2°C) provided by this study. Despite neutral to positive effects of increased growth temperature on photosynthesis in E. vaginatum, it appears to confer no lasting advantage to the species. Text Arctic Eriophorum Tundra Digital Commons @ West Chester University Arctic Ecology and Evolution 8 7 3711 3725 |
institution |
Open Polar |
collection |
Digital Commons @ West Chester University |
op_collection_id |
ftwestchesteruni |
language |
unknown |
topic |
adaptational lag Eriophorum vaginatum moist tussock tundra photosynthetic capacity respiration temperature acclimation Ecology and Evolutionary Biology |
spellingShingle |
adaptational lag Eriophorum vaginatum moist tussock tundra photosynthetic capacity respiration temperature acclimation Ecology and Evolutionary Biology Schedlbauer, Jessica L. Fetcher, Ned Hood, Katherine Moody, Michael L. Tang, Jianwu Effect of growth temperature on photosynthetic capacity and respiration in three ecotypes of Eriophorum vaginatum |
topic_facet |
adaptational lag Eriophorum vaginatum moist tussock tundra photosynthetic capacity respiration temperature acclimation Ecology and Evolutionary Biology |
description |
Ecotypic differentiation in the tussock‐forming sedge Eriophorum vaginatum has led to the development of populations that are locally adapted to climate in Alaska's moist tussock tundra. As a foundation species, E. vaginatum plays a central role in providing topographic and microclimatic variation essential to these ecosystems, but a changing climate could diminish the importance of this species. As Arctic temperatures have increased, there is evidence of adaptational lag in E. vaginatum, as locally adapted ecotypes now exhibit reduced population growth rates. Whether there is a physiological underpinning to adaptational lag is unknown. Accordingly, this possibility was investigated in reciprocal transplant gardens. Tussocks of E. vaginatum from sites separated by ~1° latitude (Coldfoot: 67°15′N, Toolik Lake: 68°37′, Sagwon: 69°25′) were transplanted into the Toolik Lake and Sagwon sites and exposed to either an ambient or an experimental warming treatment. Five tussocks pertreatment combination were measured at each garden to determine photosynthetic capacity (i.e., Vcmax and Jmax) and dark respiration rate (Rd) at measurement temperatures of 15, 20, and 25°C. Photosynthetic enhancements or homeostasis were observed for all ecotypes at both gardens under increased growth temperature, indicating no negative effect of elevated temperature on photosynthetic capacity. Further, no evidence of thermal acclimation in Rd was observed for any ecotype, and there was little evidence of ecotypic variation in Rd. As such, no physiological contribution to adaptational lag was observed given the increase in growth temperature (up to ~2°C) provided by this study. Despite neutral to positive effects of increased growth temperature on photosynthesis in E. vaginatum, it appears to confer no lasting advantage to the species. |
format |
Text |
author |
Schedlbauer, Jessica L. Fetcher, Ned Hood, Katherine Moody, Michael L. Tang, Jianwu |
author_facet |
Schedlbauer, Jessica L. Fetcher, Ned Hood, Katherine Moody, Michael L. Tang, Jianwu |
author_sort |
Schedlbauer, Jessica L. |
title |
Effect of growth temperature on photosynthetic capacity and respiration in three ecotypes of Eriophorum vaginatum |
title_short |
Effect of growth temperature on photosynthetic capacity and respiration in three ecotypes of Eriophorum vaginatum |
title_full |
Effect of growth temperature on photosynthetic capacity and respiration in three ecotypes of Eriophorum vaginatum |
title_fullStr |
Effect of growth temperature on photosynthetic capacity and respiration in three ecotypes of Eriophorum vaginatum |
title_full_unstemmed |
Effect of growth temperature on photosynthetic capacity and respiration in three ecotypes of Eriophorum vaginatum |
title_sort |
effect of growth temperature on photosynthetic capacity and respiration in three ecotypes of eriophorum vaginatum |
publisher |
Digital Commons @ West Chester University |
publishDate |
2018 |
url |
https://digitalcommons.wcupa.edu/bio_facpub/46 https://doi.org/10.1002/ece3.3939 https://digitalcommons.wcupa.edu/context/bio_facpub/article/1047/viewcontent/Schedlbauer_et_al_2018_Ecology_and_Evolution.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Eriophorum Tundra |
genre_facet |
Arctic Eriophorum Tundra |
op_source |
Biology Faculty Publications |
op_relation |
https://digitalcommons.wcupa.edu/bio_facpub/46 doi:10.1002/ece3.3939 https://digitalcommons.wcupa.edu/context/bio_facpub/article/1047/viewcontent/Schedlbauer_et_al_2018_Ecology_and_Evolution.pdf |
op_doi |
https://doi.org/10.1002/ece3.3939 |
container_title |
Ecology and Evolution |
container_volume |
8 |
container_issue |
7 |
container_start_page |
3711 |
op_container_end_page |
3725 |
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1768383751253917696 |