气候变化领域集成服务门户(CCPortal): Coastal Marsh Degradation Into Ponds Induces Irreversible Elevation Loss Relative to Sea Level in a Microtidal System

CCPortal

DOI	10.1029/2020GL089121
	Coastal Marsh Degradation Into Ponds Induces Irreversible Elevation Loss Relative to Sea Level in a Microtidal System
	Schepers L.; Brennand P.; Kirwan M.L.; Guntenspergen G.R.; Temmerman S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	Coastal marshes and their valuable ecosystem services are feared to be lost by sea level rise, yet the mechanisms of marsh degradation into ponds and potential recovery are poorly understood. We quantified and analyzed elevations of marsh surfaces and pond bottoms along a marsh loss gradient (Blackwater River, Maryland, USA). Our analyses show that ponds deepen with increasing tidal channel width connecting the ponds to the river, indicating a new feedback mechanism where channels lead to enhanced tidal export of pond bottom material. Pond elevations also decrease with increasing pond size, consistent with previous work identifying a positive feedback between wind wave erosion and pond size. These two positive feedbacks, combined with bimodal elevation distributions and sharp topographic boundaries between interior ponds and the marsh platform, indicate alternative elevation states and imply that marsh loss by pond formation is nearly irreversible once pond deepening exceeds a critical level. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Ecosystems; Ponds; Sea level; Wetlands; Blackwater; Coastal marsh; Critical level; Ecosystem services; Feedback mechanisms; Maryland , USA; Sea level rise; Tidal channel; Lakes; coastal zone; ecosystem service; elevation; environmental degradation; feedback mechanism; recovery plan; saltmarsh; sea level; tidal channel; wind wave; Blackwater River [Maryland]; Maryland; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169722
作者单位	Ecosystem Management Research Group, University of Antwerp, Antwerp, Belgium; Flanders Marine Institute (VLIZ), InnovOcean Site, Ostend, Belgium; Patuxent Wildlife Research Center, U.S. Geological Survey, Laurel, MD, United States; Department of Physical Sciences, Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA, United States
推荐引用方式 GB/T 7714	Schepers L.,Brennand P.,Kirwan M.L.,et al. Coastal Marsh Degradation Into Ponds Induces Irreversible Elevation Loss Relative to Sea Level in a Microtidal System[J],2020,47(18).
APA	Schepers L.,Brennand P.,Kirwan M.L.,Guntenspergen G.R.,&Temmerman S..(2020).Coastal Marsh Degradation Into Ponds Induces Irreversible Elevation Loss Relative to Sea Level in a Microtidal System.Geophysical Research Letters,47(18).
MLA	Schepers L.,et al."Coastal Marsh Degradation Into Ponds Induces Irreversible Elevation Loss Relative to Sea Level in a Microtidal System".Geophysical Research Letters 47.18(2020).