DOI: 10.1007/s10533-013-9897-2
Scopus记录号: 2-s2.0-84897427929
论文题名: Benthic primary production and nitrogen cycling in Spartina alterniflora marshes: Effect of restoration after acute dieback
作者: Baas P. ; Hester M.W. ; Joye S.B.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 117, 期: 2018-02-03 起始页码: 511
结束页码: 524
语种: 英语
英文关键词: Acute dieback
; Microphytobenthos
; N cycling
; Photosynthesis
; Spartina marsh
Scopus关键词: benthic environment
; denitrification
; dieback
; drought stress
; ecosystem function
; grass
; marsh
; nitrogen cycle
; nitrogen fixation
; photosynthesis
; primary production
; restoration ecology
; Georgia
; Louisiana
; United States
; Spartina
; Spartina alterniflora
英文摘要: The sudden and massive Spartina alterniflora dieback at the turn of the millennium generated numerous unanswered questions regarding its mechanistic causes and consequences. This study, conducted during 2007-2008, aimed to elucidate mechanisms of recovery and determine whether recovery was accelerated by replanting efforts. The onset of a severe drought during the summer of 2007, however, provided a potential glimpse into the mechanisms driving dieback events. Study sites were established in two of the hardest hit states, Georgia and Louisiana. Each site had a replicated block design consisting of the following four treatments: reference, dieback, dieback with low density replanting (90 cm spacing), and dieback with high density replanting (30 cm spacing). To assess biogeochemical cycling and ecosystem functioning, we quantified rates of nitrogen fixation, potential nitrification, potential denitrification, and benthic production biannually. All measured process rates decreased following the drought year of 2007. Nitrogen fixation was positively correlated with benthic production rates in Louisiana, while denitrification was positively correlated with benthic production rates in Georgia and Louisiana. The lack of decreased benthic production during the 2007 drought could indicate that benthic microphytes cope with better with drought than plants, but may be outcompeted during non-drought years. Replanting efforts significantly increased ecosystem recovery in Louisiana and to a lesser extent in Georgia. © 2013 Springer Science+Business Media Dordrecht. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83615
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Marine Sciences, The University of Georgia, Marine Sciences Building, Athens, GA, 30602-3636, United States; Odum School of Ecology, The University of Georgia, Athens, GA, 30602, United States; Department of Biological Sciences, University of Louisiana, Lafayette, LA, 70504, United States
Recommended Citation:
Baas P.,Hester M.W.,Joye S.B.. Benthic primary production and nitrogen cycling in Spartina alterniflora marshes: Effect of restoration after acute dieback[J]. Biogeochemistry,2014-01-01,117(2018-02-03)