globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13398
论文题名:
Upslope development of a tidal marsh as a function of upland land use
作者: Anisfeld S.C.; Cooper K.R.; Kemp A.C.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:2
起始页码: 755
结束页码: 766
语种: 英语
英文关键词: foraminifera ; indicators ; Long Island Sound ; migration ; sea-level rise ; soil salinity
Scopus关键词: Foraminifera
英文摘要: To thrive in a time of rapid sea-level rise, tidal marshes will need to migrate upslope into adjacent uplands. Yet little is known about the mechanics of this process, especially in urbanized estuaries, where the adjacent upland is likely to be a mowed lawn rather than a wooded natural area. We studied marsh migration in a Long Island Sound salt marsh using detailed hydrologic, edaphic, and biotic sampling along marsh-to-upland transects in both wooded and lawn environments. We found that the overall pace of marsh development was largely unaffected by whether the upland being invaded was lawn or wooded, but the marsh-edge plant communities that developed in these two environments were quite different, and some indicators (soil salinity, foraminifera) appeared to migrate more easily into lawns. In addition, we found that different aspects of marsh structure and function migrated at different rates: Wetland vegetation appeared to be a leading indicator of marsh migration, while soil characteristics such as redox potential and surface salinity developed later in the process. We defined a ‘hydrologic migration zone’, consisting of elevations that experience tidal inundation with frequencies ranging from 20% to 0.5% of high tides. This hydrologically defined zone – which extended to an elevation higher than the highest astronomical tide datum – captured the biotic and edaphic marsh-upland ecotone. Tidal inundation at the upper border of this migration zone is highly variable over time and may be rising more rapidly than mean sea level. Our results indicate that land management practices at the upland periphery of tidal marshes can facilitate or impede ecosystem migration in response to rising sea level. These findings are applicable to large areas of tidal marsh along the U.S. Atlantic coast and in other urbanized coastal settings. © 2016 John Wiley & Sons Ltd
资助项目: We thank Connecticut Sea Grant for funding (award NA14OAR4170086, subaward 47940). We are very grateful to the staff at Sherwood Island State Park, especially James Beschle, for their cooperation and assistance with this work. For assistance in the field and laboratory, we thank Jonathan Cooper and Yale students Michelle Camp, Bunyod Holmatov, Allison Khoe, Jamie O'Connell, Rebecca Schultz, and Kevin Sherrill. We thank Pincelli Hull for microscope use and Brad Erkkila, Helmut Ernstberger, Troy Hill, and Jonas Karosas for laboratory guidance. This study benefitted from conversation with Alex Felson and comments from two anonymous reviewers. We thank Kerstin Wasson for sharing hydrology and elevation data from her study in Elkhorn Slough. This work is a contribution to PALSEA2 and IGCP Project 639, ‘Sea-level change from minutes to millennia’.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61054
Appears in Collections:影响、适应和脆弱性

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作者单位: School of Forestry and Environmental Studies, Yale University, 370 Prospect St., New Haven, CT, United States; Department of Earth and Ocean Sciences, Tufts University, Medford, MA, United States

Recommended Citation:
Anisfeld S.C.,Cooper K.R.,Kemp A.C.. Upslope development of a tidal marsh as a function of upland land use[J]. Global Change Biology,2017-01-01,23(2)
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