DOI: 10.1111/gcb.12147
论文题名: Tidal marsh plant responses to elevated CO2, nitrogen fertilization, and sea level rise
作者: Adam Langley J. ; Mozdzer T.J. ; Shepard K.A. ; Hagerty S.B. ; Patrick Megonigal J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 5 起始页码: 1495
结束页码: 1503
语种: 英语
英文关键词: Marsh organ
; Mesocosms
; Plant productivity
; Schoenoplectus americanus
; Soil elevation
; Spartina patens
Scopus关键词: carbon dioxide
; nitrogen
; sea water
; biological production
; carbon dioxide
; ecosystem response
; intertidal environment
; marsh
; mesocosm
; nitrogen
; plant
; sea level change
; air pollutant
; article
; climate change
; Cyperaceae
; drug effect
; growth, development and aging
; Poaceae
; randomization
; season
; soil pollutant
; United States
; wetland
; Air Pollutants
; Carbon Dioxide
; Climate Change
; Cyperaceae
; Maryland
; Nitrogen
; Poaceae
; Random Allocation
; Seasons
; Seawater
; Soil Pollutants
; Wetlands
; Carex adelostoma
; Schoenoplectus americanus
; Spartina patens
英文摘要: Elevated CO2 and nitrogen (N) addition directly affect plant productivity and the mechanisms that allow tidal marshes to maintain a constant elevation relative to sea level, but it remains unknown how these global change drivers modify marsh plant response to sea level rise. Here we manipulated factorial combinations of CO2 concentration (two levels), N availability (two levels) and relative sea level (six levels) using in situ mesocosms containing a tidal marsh community composed of a sedge, Schoenoplectus americanus, and a grass, Spartina patens. Our objective is to determine, if elevated CO2 and N alter the growth and persistence of these plants in coastal ecosystems facing rising sea levels. After two growing seasons, we found that N addition enhanced plant growth particularly at sea levels where plants were most stressed by flooding (114% stimulation in the + 10 cm treatment), and N effects were generally larger in combination with elevated CO2 (288% stimulation). N fertilization shifted the optimal productivity of S. patens to a higher sea level, but did not confer S. patens an enhanced ability to tolerate sea level rise. S. americanus responded strongly to N only in the higher sea level treatments that excluded S. patens. Interestingly, addition of N, which has been suggested to accelerate marsh loss, may afford some marsh plants, such as the widespread sedge, S. americanus, the enhanced ability to tolerate inundation. However, if chronic N pollution reduces the availability of propagules of S. americanus or other flood-tolerant species on the landscape scale, this shift in species dominance could render tidal marshes more susceptible to marsh collapse. © 2013 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62453
Appears in Collections: 影响、适应和脆弱性
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作者单位: Biology Department, Villanova University, Villanova, PA, 19003, United States; Biology Department, Bryn Mawr College, Bryn Mawr, PA, 19010, United States; Cary Institute of Ecosystem Studies, Milbrook, NY, 12545, United States; Biology Department, Northern Arizona University, Flagstaff, AZ, 86011, United States; Smithsonian Environmental Research Center, Edgewater, MD, 21037, United States
Recommended Citation:
Adam Langley J.,Mozdzer T.J.,Shepard K.A.,et al. Tidal marsh plant responses to elevated CO2, nitrogen fertilization, and sea level rise[J]. Global Change Biology,2013-01-01,19(5)