Predicting ecosystem carbon balance in a warming Arctic: The importance of long-term thermal acclimation potential and inhibitory effects of light on respiration
The carbon balance of Arctic ecosystems is particularly sensitive to global environmental change. Leaf respiration (R),a temperature-dependent key process in determining the carbon balance, is not well-understood in Arctic plants. The potential for plants to acclimate to warmer conditions could stro...
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ftcquniportalfig:oai:figshare.com:article/13393946 2023-05-15T14:38:47+02:00 Predicting ecosystem carbon balance in a warming Arctic: The importance of long-term thermal acclimation potential and inhibitory effects of light on respiration BC McLaughlin Chengyuan Xu EB Rastetter KL Griffin 2014-06-01T00:00:00Z http://hdl.handle.net/10018/1251993 unknown https://figshare.com/articles/journal_contribution/Predicting_ecosystem_carbon_balance_in_a_warming_Arctic_The_importance_of_long-term_thermal_acclimation_potential_and_inhibitory_effects_of_light_on_respiration/13393946 http://hdl.handle.net/10018/1251993 CQUniversity General 1.0 Ecological Impacts of Climate Change Carbon Sequestration Science Plant Physiology Acclimation Arctic Betula Nana Climate change Eriophorum Vaginatum Kok effect Tundra Text Journal contribution 2014 ftcquniportalfig 2022-08-05T12:19:09Z The carbon balance of Arctic ecosystems is particularly sensitive to global environmental change. Leaf respiration (R),a temperature-dependent key process in determining the carbon balance, is not well-understood in Arctic plants. The potential for plants to acclimate to warmer conditions could strongly impact future global carbon balance. Two key unanswered questions are (1) whether short-term temperature responses can predict long-term respiratory responses to growth in elevated temperatures and (2) to what extent the constant daylight conditions of the Arctic growing sea-son inhibit leaf respiration. In two dominant Arctic species Eriophorum vaginatum (tussock grass) and Betula nana(woody shrub), we assessed the extent of respiratory inhibition in the light (RL/RD), respiratory response to short-term temperature change, and respiratory acclimation to long-term warming treatments. We found that R of both species is strongly inhibited by light (averaging 35% across all measurement temperatures). In E. vaginatum both R Land RD acclimated to the long-term warming treatment, reducing the magnitude of respiratory response relative to the short-term response to temperature increase. In B. nana, both R Land RD responded to short-term temperature increase but showed no acclimation to the long-term warming. The ability to predict plant respiratory response to global warming with short-term temperature responses will depend on species-specific acclimation potential and thedifferential response of RLand RDto temperature. With projected woody shrub encroachment in Arctic tundra and continued warming, changing species dominance between these two functional groups, may impact ecosystem respiratory response and carbon balance. Other Non-Article Part of Journal/Newspaper Arctic Betula nana Climate change Eriophorum Global warming Tundra CQUniversity: acquire Arctic |
institution |
Open Polar |
collection |
CQUniversity: acquire |
op_collection_id |
ftcquniportalfig |
language |
unknown |
topic |
Ecological Impacts of Climate Change Carbon Sequestration Science Plant Physiology Acclimation Arctic Betula Nana Climate change Eriophorum Vaginatum Kok effect Tundra |
spellingShingle |
Ecological Impacts of Climate Change Carbon Sequestration Science Plant Physiology Acclimation Arctic Betula Nana Climate change Eriophorum Vaginatum Kok effect Tundra BC McLaughlin Chengyuan Xu EB Rastetter KL Griffin Predicting ecosystem carbon balance in a warming Arctic: The importance of long-term thermal acclimation potential and inhibitory effects of light on respiration |
topic_facet |
Ecological Impacts of Climate Change Carbon Sequestration Science Plant Physiology Acclimation Arctic Betula Nana Climate change Eriophorum Vaginatum Kok effect Tundra |
description |
The carbon balance of Arctic ecosystems is particularly sensitive to global environmental change. Leaf respiration (R),a temperature-dependent key process in determining the carbon balance, is not well-understood in Arctic plants. The potential for plants to acclimate to warmer conditions could strongly impact future global carbon balance. Two key unanswered questions are (1) whether short-term temperature responses can predict long-term respiratory responses to growth in elevated temperatures and (2) to what extent the constant daylight conditions of the Arctic growing sea-son inhibit leaf respiration. In two dominant Arctic species Eriophorum vaginatum (tussock grass) and Betula nana(woody shrub), we assessed the extent of respiratory inhibition in the light (RL/RD), respiratory response to short-term temperature change, and respiratory acclimation to long-term warming treatments. We found that R of both species is strongly inhibited by light (averaging 35% across all measurement temperatures). In E. vaginatum both R Land RD acclimated to the long-term warming treatment, reducing the magnitude of respiratory response relative to the short-term response to temperature increase. In B. nana, both R Land RD responded to short-term temperature increase but showed no acclimation to the long-term warming. The ability to predict plant respiratory response to global warming with short-term temperature responses will depend on species-specific acclimation potential and thedifferential response of RLand RDto temperature. With projected woody shrub encroachment in Arctic tundra and continued warming, changing species dominance between these two functional groups, may impact ecosystem respiratory response and carbon balance. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
BC McLaughlin Chengyuan Xu EB Rastetter KL Griffin |
author_facet |
BC McLaughlin Chengyuan Xu EB Rastetter KL Griffin |
author_sort |
BC McLaughlin |
title |
Predicting ecosystem carbon balance in a warming Arctic: The importance of long-term thermal acclimation potential and inhibitory effects of light on respiration |
title_short |
Predicting ecosystem carbon balance in a warming Arctic: The importance of long-term thermal acclimation potential and inhibitory effects of light on respiration |
title_full |
Predicting ecosystem carbon balance in a warming Arctic: The importance of long-term thermal acclimation potential and inhibitory effects of light on respiration |
title_fullStr |
Predicting ecosystem carbon balance in a warming Arctic: The importance of long-term thermal acclimation potential and inhibitory effects of light on respiration |
title_full_unstemmed |
Predicting ecosystem carbon balance in a warming Arctic: The importance of long-term thermal acclimation potential and inhibitory effects of light on respiration |
title_sort |
predicting ecosystem carbon balance in a warming arctic: the importance of long-term thermal acclimation potential and inhibitory effects of light on respiration |
publishDate |
2014 |
url |
http://hdl.handle.net/10018/1251993 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Betula nana Climate change Eriophorum Global warming Tundra |
genre_facet |
Arctic Betula nana Climate change Eriophorum Global warming Tundra |
op_relation |
https://figshare.com/articles/journal_contribution/Predicting_ecosystem_carbon_balance_in_a_warming_Arctic_The_importance_of_long-term_thermal_acclimation_potential_and_inhibitory_effects_of_light_on_respiration/13393946 http://hdl.handle.net/10018/1251993 |
op_rights |
CQUniversity General 1.0 |
_version_ |
1766310810385121280 |