Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13945 |
Will fluctuations in salt marsh-mangrove dominance alter vulnerability of a subtropical wetland to sea-level rise? | |
McKee, Karen L.; Vervaeke, William C. | |
2018-03-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:3页码:1224-1238 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | To avoid submergence during sea-level rise, coastal wetlands build soil surfaces vertically through accumulation of inorganic sediment and organic matter. At climatic boundaries where mangroves are expanding and replacing salt marsh, wetland capacity to respond to sea-level rise may change. To compare how well mangroves and salt marshes accommodate sea-level rise, we conducted a manipulative field experiment in a subtropical plant community in the subsiding Mississippi River Delta. Experimental plots were established in spatially equivalent positions along creek banks in monospecific stands of Spartina alterniflora (smooth cordgrass) or Avicennia germinans (black mangrove) and in mixed stands containing both species. To examine the effect of disturbance on elevation dynamics, vegetation in half of the plots was subjected to freezing (mangrove) or wrack burial (salt marsh), which caused shoot mortality. Vertical soil development was monitored for 6 years with the surface elevation table-marker horizon system. Comparison of land movement with relative sea-level rise showed that this plant community was experiencing an elevation deficit (i.e., sea level was rising faster than the wetland was building vertically) and was relying on elevation capital (i.e., relative position in the tidal frame) to survive. Although Avicennia plots had more elevation capital, suggesting longer survival, than Spartina or mixed plots, vegetation type had no effect on rates of accretion, vertical movement in root and sub-root zones, or net elevation change. Thus, these salt marsh and mangrove assemblages were accreting sediment and building vertically at equivalent rates. Small-scale disturbance of the plant canopy also had no effect on elevation trajectoriescontrary to work in peat-forming wetlands showing elevation responses to changes in plant productivity. The findings indicate that in this deltaic setting with strong physical influences controlling elevation (sediment accretion, subsidence), mangrove replacement of salt marsh, with or without disturbance, will not necessarily alter vulnerability to sea-level rise. |
英文关键词 | accretion Avicennia germinans climate change coastal wetland disturbance elevation sedimentation Spartina alterniflora |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425396700030 |
WOS关键词 | GULF-OF-MEXICO ; MISSISSIPPI RIVER DELTA ; AVICENNIA-GERMINANS ; SURFACE ELEVATION ; COASTAL WETLANDS ; BLACK MANGROVE ; CLIMATE-CHANGE ; PEAT COLLAPSE ; RANGE LIMIT ; EXPANSION |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/18264 |
专题 | 气候变化 资源环境科学 |
作者单位 | US Geol Survey, Wetland & Aquat Res Ctr, Lafayette, LA 70506 USA |
推荐引用方式 GB/T 7714 | McKee, Karen L.,Vervaeke, William C.. Will fluctuations in salt marsh-mangrove dominance alter vulnerability of a subtropical wetland to sea-level rise?[J]. GLOBAL CHANGE BIOLOGY,2018,24(3):1224-1238. |
APA | McKee, Karen L.,&Vervaeke, William C..(2018).Will fluctuations in salt marsh-mangrove dominance alter vulnerability of a subtropical wetland to sea-level rise?.GLOBAL CHANGE BIOLOGY,24(3),1224-1238. |
MLA | McKee, Karen L.,et al."Will fluctuations in salt marsh-mangrove dominance alter vulnerability of a subtropical wetland to sea-level rise?".GLOBAL CHANGE BIOLOGY 24.3(2018):1224-1238. |
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