Ecotypic differentiation in photosynthesis and growth of Eriophorum vaginatum along a latitudinal gradient in the Arctic tundra
Ecotypic differentiation reduces climatic niche breadth at the population level relative to a species’ spatial distribution. For species that form climatic ecotypes, if future climate exceeds local population tolerance, climate change will precipitate the decline of extant populations range-wide. He...
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2014
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Online Access: | http://dx.doi.org/10.1139/cjb-2013-0320 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjb-2013-0320 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjb-2013-0320 |
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crcansciencepubl:10.1139/cjb-2013-0320 2023-12-17T10:17:59+01:00 Ecotypic differentiation in photosynthesis and growth of Eriophorum vaginatum along a latitudinal gradient in the Arctic tundra Souther, Sara Fetcher, Ned Fowler, Zachariah Shaver, Gaius R. McGraw, James B. 2014 http://dx.doi.org/10.1139/cjb-2013-0320 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjb-2013-0320 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjb-2013-0320 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Botany volume 92, issue 8, page 551-561 ISSN 1916-2790 1916-2804 Plant Science Ecology Ecology, Evolution, Behavior and Systematics journal-article 2014 crcansciencepubl https://doi.org/10.1139/cjb-2013-0320 2023-11-19T13:38:56Z Ecotypic differentiation reduces climatic niche breadth at the population level relative to a species’ spatial distribution. For species that form climatic ecotypes, if future climate exceeds local population tolerance, climate change will precipitate the decline of extant populations range-wide. Here, we examine the variation in physiological and morphological traits of Eriophorum vaginatum L. collected from a 30-year-old reciprocal transplant experiment, in which six populations of E. vaginatum were transplanted along a latitudinal gradient from Eagle Creek to Prudhoe Bay, Alaska. We tested for ecotypic differentiation of photosynthesis, respiration, chlorophyll fluorescence, and biomass per tiller, which is a metric correlated with population growth in E. vaginatum. The light-saturated photosynthetic rate (A max ) showed homesite advantage in that tussocks in their homesites had significantly higher values of A max relative to nonlocal populations. This pattern of homesite advantage was also observed for biomass per tiller, but not for fluorescence and respiration. Photosynthetic rate was positively correlated with biomass per tiller and survival, suggesting that adaptations related to photosynthesis may optimize performance of local populations to homesite conditions. Taken together, these findings indicate that a rapidly changing climate may elicit population decline of E. vaginatum, rendering this species at a competitive disadvantage to shrubs and boreal forest species, which are expanding northward as the climate changes. Transition from tussock-sedge tundra to boreal forest and shrubland alters features, such as albedo, soil temperature, and water-table depth, in ways that may accelerate climate change. Article in Journal/Newspaper albedo Arctic Climate change Eriophorum Prudhoe Bay Tundra Alaska Canadian Science Publishing (via Crossref) Arctic Botany 92 8 551 561 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Plant Science Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Plant Science Ecology Ecology, Evolution, Behavior and Systematics Souther, Sara Fetcher, Ned Fowler, Zachariah Shaver, Gaius R. McGraw, James B. Ecotypic differentiation in photosynthesis and growth of Eriophorum vaginatum along a latitudinal gradient in the Arctic tundra |
topic_facet |
Plant Science Ecology Ecology, Evolution, Behavior and Systematics |
description |
Ecotypic differentiation reduces climatic niche breadth at the population level relative to a species’ spatial distribution. For species that form climatic ecotypes, if future climate exceeds local population tolerance, climate change will precipitate the decline of extant populations range-wide. Here, we examine the variation in physiological and morphological traits of Eriophorum vaginatum L. collected from a 30-year-old reciprocal transplant experiment, in which six populations of E. vaginatum were transplanted along a latitudinal gradient from Eagle Creek to Prudhoe Bay, Alaska. We tested for ecotypic differentiation of photosynthesis, respiration, chlorophyll fluorescence, and biomass per tiller, which is a metric correlated with population growth in E. vaginatum. The light-saturated photosynthetic rate (A max ) showed homesite advantage in that tussocks in their homesites had significantly higher values of A max relative to nonlocal populations. This pattern of homesite advantage was also observed for biomass per tiller, but not for fluorescence and respiration. Photosynthetic rate was positively correlated with biomass per tiller and survival, suggesting that adaptations related to photosynthesis may optimize performance of local populations to homesite conditions. Taken together, these findings indicate that a rapidly changing climate may elicit population decline of E. vaginatum, rendering this species at a competitive disadvantage to shrubs and boreal forest species, which are expanding northward as the climate changes. Transition from tussock-sedge tundra to boreal forest and shrubland alters features, such as albedo, soil temperature, and water-table depth, in ways that may accelerate climate change. |
format |
Article in Journal/Newspaper |
author |
Souther, Sara Fetcher, Ned Fowler, Zachariah Shaver, Gaius R. McGraw, James B. |
author_facet |
Souther, Sara Fetcher, Ned Fowler, Zachariah Shaver, Gaius R. McGraw, James B. |
author_sort |
Souther, Sara |
title |
Ecotypic differentiation in photosynthesis and growth of Eriophorum vaginatum along a latitudinal gradient in the Arctic tundra |
title_short |
Ecotypic differentiation in photosynthesis and growth of Eriophorum vaginatum along a latitudinal gradient in the Arctic tundra |
title_full |
Ecotypic differentiation in photosynthesis and growth of Eriophorum vaginatum along a latitudinal gradient in the Arctic tundra |
title_fullStr |
Ecotypic differentiation in photosynthesis and growth of Eriophorum vaginatum along a latitudinal gradient in the Arctic tundra |
title_full_unstemmed |
Ecotypic differentiation in photosynthesis and growth of Eriophorum vaginatum along a latitudinal gradient in the Arctic tundra |
title_sort |
ecotypic differentiation in photosynthesis and growth of eriophorum vaginatum along a latitudinal gradient in the arctic tundra |
publisher |
Canadian Science Publishing |
publishDate |
2014 |
url |
http://dx.doi.org/10.1139/cjb-2013-0320 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjb-2013-0320 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjb-2013-0320 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic Climate change Eriophorum Prudhoe Bay Tundra Alaska |
genre_facet |
albedo Arctic Climate change Eriophorum Prudhoe Bay Tundra Alaska |
op_source |
Botany volume 92, issue 8, page 551-561 ISSN 1916-2790 1916-2804 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjb-2013-0320 |
container_title |
Botany |
container_volume |
92 |
container_issue |
8 |
container_start_page |
551 |
op_container_end_page |
561 |
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1785530763862605824 |