气候变化领域集成服务门户(CCPortal): Effects of Warming and Elevated CO2 on Stomatal Conductance and Chlorophyll Fluorescence of C3 and C4 Coastal Wetland Species

CCPortal

DOI	10.1007/s13157-024-01780-0
	Effects of Warming and Elevated CO2 on Stomatal Conductance and Chlorophyll Fluorescence of C3 and C4 Coastal Wetland Species
	Sendall, Kerrie M.; Munoz, Cyd M. Melendez; Ritter, Angela D.; Rich, Roy L.; Noyce, Genevieve L.; Megonigal, J. Patrick
发表日期	2024
ISSN	0277-5212
EISSN	1943-6246
起始页码	44
结束页码	4
卷号	44 期号:4
英文摘要	Coastal wetland communities provide valuable ecosystem services such as erosion prevention, soil accretion, and essential habitat for coastal wildlife, but are some of the most vulnerable to the threats of climate change. This work investigates the combined effects of two climate stressors, elevated temperature (ambient, + 1.7 degrees C, + 3.4 degrees C, and 5.1 degrees C) and elevated CO2 (eCO(2)), on leaf physiological traits of dominant salt marsh plant species. The research took place at the Salt Marsh Accretion Response to Temperature eXperiment (SMARTX) at the Smithsonian Environmental Research Center, which includes two plant communities: a C-3 sedge community and a C-4 grass community. Here we present data collected over five years on rates of stomatal conductance (g(s)), quantum efficiency of PSII photochemistry (F-v/F-m), and rates of electron transport (ETRmax). We found that both warming and eCO(2) caused declines in all traits, but the warming effects were greater for the C-3 sedge. This species showed a strong negative stomatal response to warming in 2017 and 2018 (28% and 17% reduction, respectively in + 5.1 degrees C). However, in later years the negative response to warming was dampened to < 7%, indicating that S. americanus was able to partially acclimate to the warming over time. In 2022, we found that sedges growing in the combined + 5.1 degrees C eCO(2) plots exhibited more significant declines in g(s), F-v/F-m, and ETRmax than in either treatment individually. These results are important for predicting future trends in growth of wetland species, which serve as a large carbon sink that may help mitigate the effects of climate change.
英文关键词	Climate warming; Distichlis spicata; Elevated CO2; Schoenoplectus americanus; Spartina patens; Stomatal conductance
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology ; Environmental Sciences
WOS记录号	WOS:001187540500001
来源期刊	WETLANDS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290040
作者单位	Rider University; University System of Georgia; Georgia Southern University; Smithsonian Institution; Smithsonian Environmental Research Center
推荐引用方式 GB/T 7714	Sendall, Kerrie M.,Munoz, Cyd M. Melendez,Ritter, Angela D.,et al. Effects of Warming and Elevated CO2 on Stomatal Conductance and Chlorophyll Fluorescence of C3 and C4 Coastal Wetland Species[J],2024,44(4).
APA	Sendall, Kerrie M.,Munoz, Cyd M. Melendez,Ritter, Angela D.,Rich, Roy L.,Noyce, Genevieve L.,&Megonigal, J. Patrick.(2024).Effects of Warming and Elevated CO2 on Stomatal Conductance and Chlorophyll Fluorescence of C3 and C4 Coastal Wetland Species.WETLANDS,44(4).
MLA	Sendall, Kerrie M.,et al."Effects of Warming and Elevated CO2 on Stomatal Conductance and Chlorophyll Fluorescence of C3 and C4 Coastal Wetland Species".WETLANDS 44.4(2024).