气候变化领域集成服务门户(CCPortal): Nitrogen status regulates morphological adaptation of marsh plants to elevated CO2

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DOI	10.1038/s41558-019-0582-x
	Nitrogen status regulates morphological adaptation of marsh plants to elevated CO2
	Lu M.; Herbert E.R.; Langley J.A.; Kirwan M.L.; Megonigal J.P.
发表日期	2019
ISSN	1758678X
卷号	9 期号:10
英文摘要	Coastal wetlands provide valuable ecosystem services that are increasingly threatened by anthropogenic activities1. The atmospheric carbon dioxide (CO2) concentration has increased from 280 ppm to 404 ppm since the Industrial Revolution and is projected to exceed 900 ppm by 2100 (ref. 2). In terrestrial ecosystems, elevated CO2 typically stimulates C3 plant photosynthesis and primary productivity leading to an increase in plant size3. However, compared with woody plants or crops4, the morphological responses of clonal non-woody plants to elevated CO2 have rarely been examined. We show that 30 years of experimental CO2 enrichment in a brackish marsh increased primary productivity and stem density but decreased stem diameter and height of the dominant clonal species Schoenoplectus americanus. Smaller, denser stems were associated with the expansion of roots and rhizomes to alleviate nitrogen (N) limitation as evidenced by high N immobilization in live tissue and litter, high tissue C:N ratio and low available porewater N. Changes in morphology and tissue chemistry induced by elevated CO2 were reversed by N addition. We demonstrate that morphological responses to CO2 and N supply in a clonal plant species influences the capacity of marshes to gain elevation at rates that keep pace with rising sea levels. © 2019, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.
语种	英语
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124329
作者单位	Smithsonian Environmental Research Center, Edgewater, MD, United States; School of Ecology and Environmental Sciences, Yunnan University, Kunming, China; Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA, United States; Department of Biology, Villanova University, Villanova, PA, United States
推荐引用方式 GB/T 7714	Lu M.,Herbert E.R.,Langley J.A.,et al. Nitrogen status regulates morphological adaptation of marsh plants to elevated CO2[J],2019,9(10).
APA	Lu M.,Herbert E.R.,Langley J.A.,Kirwan M.L.,&Megonigal J.P..(2019).Nitrogen status regulates morphological adaptation of marsh plants to elevated CO2.Nature Climate Change,9(10).
MLA	Lu M.,et al."Nitrogen status regulates morphological adaptation of marsh plants to elevated CO2".Nature Climate Change 9.10(2019).