The competitive advantage of a constitutive CAM species over a C4 grass species under drought and CO2 enrichment
Abstract Plants with crassulacean acid metabolism (CAM) are increasing in distribution and abundance in drylands worldwide, but the underlying drivers remain unknown. We investigate the impacts of extreme drought and CO2 enrichment on the competitive relationships between seedlings of Cylindropuntia...
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Online Access: | https://doi.org/10.1002/ecs2.2721 |
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doaj-e366801f4924471e857d22318b5c9faa2020-11-25T00:14:29ZengWileyEcosphere2150-89252019-05-01105n/an/a10.1002/ecs2.2721The competitive advantage of a constitutive CAM species over a C4 grass species under drought and CO2 enrichmentKailiang Yu0Paolo D'Odorico1Scott L. Collins2David Carr3Amilcare Porporato4William R. L. Anderegg5William P. Gilhooly III6Lixin Wang7Abinash Bhattachan8Mark Bartlett9Samantha Hartzell10Jun Yin11Yongli He12Wei Li13Mokganedi Tatlhego14Jose D. Fuentes15Department of Environmental Sciences University of Virginia Charlottesville Virginia 22904 USADepartment of Environmental Sciences University of Virginia Charlottesville Virginia 22904 USADepartment of Biology University of New Mexico Albuquerque New Mexico 87131 USADepartment of Environmental Sciences University of Virginia Charlottesville Virginia 22904 USADepartment of Civil and Environmental Engineering Duke University Durham North Carolina 27708 USADepartment of Biology University of Utah Salt Lake City Utah 84112 USADepartment of Earth Sciences Indiana University Purdue University Indianapolis (IUPUI) Indianapolis Indiana 46202 USADepartment of Earth Sciences Indiana University Purdue University Indianapolis (IUPUI) Indianapolis Indiana 46202 USADepartment of Forestry and Environmental Resources North Carolina State University Raleigh North Carolina 27607 USADepartment of Civil and Environmental Engineering Duke University Durham North Carolina 27708 USADepartment of Civil and Environmental Engineering Duke University Durham North Carolina 27708 USADepartment of Civil and Environmental Engineering Duke University Durham North Carolina 27708 USADepartment of Environmental Sciences University of Virginia Charlottesville Virginia 22904 USADepartment of Environmental Sciences University of Virginia Charlottesville Virginia 22904 USADepartment of Environmental Sciences University of Virginia Charlottesville Virginia 22904 USADepartment of Meteorology Pennsylvania State University University Park Pennsylvania 16802 USAAbstract Plants with crassulacean acid metabolism (CAM) are increasing in distribution and abundance in drylands worldwide, but the underlying drivers remain unknown. We investigate the impacts of extreme drought and CO2 enrichment on the competitive relationships between seedlings of Cylindropuntia imbricata (CAM species) and Bouteloua eriopoda (C4 grass), which coexist in semiarid ecosystems across the Southwestern United States. Our experiments under altered water and CO2 water conditions show that C. imbricata positively responded to CO2 enrichment under extreme drought conditions, while B. eriopoda declined from drought stress and did not recover after the drought ended. Conversely, in well‐watered conditions B. eriopoda had a strong competitive advantage on C. imbricata such that the photosynthetic rate and biomass (per individual) of C. imbricata grown with B. eriopoda were lower relative to when growing alone. A meta‐analysis examining multiple plant families across global drylands shows a positive response of CAM photosynthesis and productivity to CO2 enrichment. Collectively, our results suggest that under drought and elevated CO2 concentrations, projected with climate change, the competitive advantage of plant functional groups may shift and the dominance of CAM plants may increase in semiarid ecosystems.https://doi.org/10.1002/ecs2.2721Bouteloua eriopoda (C4 grass)CO2 enrichmentcompetitionCrassulacean acid metabolism (CAM species)Cylindropuntia imbricata (CAM species)drought |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kailiang Yu Paolo D'Odorico Scott L. Collins David Carr Amilcare Porporato William R. L. Anderegg William P. Gilhooly III Lixin Wang Abinash Bhattachan Mark Bartlett Samantha Hartzell Jun Yin Yongli He Wei Li Mokganedi Tatlhego Jose D. Fuentes |
spellingShingle |
Kailiang Yu Paolo D'Odorico Scott L. Collins David Carr Amilcare Porporato William R. L. Anderegg William P. Gilhooly III Lixin Wang Abinash Bhattachan Mark Bartlett Samantha Hartzell Jun Yin Yongli He Wei Li Mokganedi Tatlhego Jose D. Fuentes The competitive advantage of a constitutive CAM species over a C4 grass species under drought and CO2 enrichment Ecosphere Bouteloua eriopoda (C4 grass) CO2 enrichment competition Crassulacean acid metabolism (CAM species) Cylindropuntia imbricata (CAM species) drought |
author_facet |
Kailiang Yu Paolo D'Odorico Scott L. Collins David Carr Amilcare Porporato William R. L. Anderegg William P. Gilhooly III Lixin Wang Abinash Bhattachan Mark Bartlett Samantha Hartzell Jun Yin Yongli He Wei Li Mokganedi Tatlhego Jose D. Fuentes |
author_sort |
Kailiang Yu |
title |
The competitive advantage of a constitutive CAM species over a C4 grass species under drought and CO2 enrichment |
title_short |
The competitive advantage of a constitutive CAM species over a C4 grass species under drought and CO2 enrichment |
title_full |
The competitive advantage of a constitutive CAM species over a C4 grass species under drought and CO2 enrichment |
title_fullStr |
The competitive advantage of a constitutive CAM species over a C4 grass species under drought and CO2 enrichment |
title_full_unstemmed |
The competitive advantage of a constitutive CAM species over a C4 grass species under drought and CO2 enrichment |
title_sort |
competitive advantage of a constitutive cam species over a c4 grass species under drought and co2 enrichment |
publisher |
Wiley |
series |
Ecosphere |
issn |
2150-8925 |
publishDate |
2019-05-01 |
description |
Abstract Plants with crassulacean acid metabolism (CAM) are increasing in distribution and abundance in drylands worldwide, but the underlying drivers remain unknown. We investigate the impacts of extreme drought and CO2 enrichment on the competitive relationships between seedlings of Cylindropuntia imbricata (CAM species) and Bouteloua eriopoda (C4 grass), which coexist in semiarid ecosystems across the Southwestern United States. Our experiments under altered water and CO2 water conditions show that C. imbricata positively responded to CO2 enrichment under extreme drought conditions, while B. eriopoda declined from drought stress and did not recover after the drought ended. Conversely, in well‐watered conditions B. eriopoda had a strong competitive advantage on C. imbricata such that the photosynthetic rate and biomass (per individual) of C. imbricata grown with B. eriopoda were lower relative to when growing alone. A meta‐analysis examining multiple plant families across global drylands shows a positive response of CAM photosynthesis and productivity to CO2 enrichment. Collectively, our results suggest that under drought and elevated CO2 concentrations, projected with climate change, the competitive advantage of plant functional groups may shift and the dominance of CAM plants may increase in semiarid ecosystems. |
topic |
Bouteloua eriopoda (C4 grass) CO2 enrichment competition Crassulacean acid metabolism (CAM species) Cylindropuntia imbricata (CAM species) drought |
url |
https://doi.org/10.1002/ecs2.2721 |
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