NDLI: Delineation of Coastal Marsh Types Along the Central Texas Coast

Content Provider	Springer Nature Link
Author	Mitchell, Michael K. Ballard, Bart M. Visser, Jenneke M. Brasher, Michael G. Redeker, Eric J.
Copyright Year	2014
Abstract	Tidally influenced wetlands along the Texas coast provide important habitat for wintering waterfowl and myriad other fish and wildlife species. Because habitat values may differ among marsh salinity zones (e.g., waterfowl food resources and use are greatest in fresh and intermediate marsh), the spatial distribution of marsh types is important for understanding the capacity of coastal landscapes to support waterfowl and other wildlife populations and informing coastal restoration priorities. Additionally, documenting spatial patterns of coastal marsh types is necessary for projecting future landscape change and examining impacts of environmental processes (e.g., tropical storms, sea level rise). We used a helicopter-based vegetation survey and remotely sensed imagery to delineate marsh types along the central Texas coast into four categories: fresh, intermediate, brackish, and saline. We recorded vegetation composition at 342 sample points and combined these data with Landsat Thematic Mapper imagery to perform a supervised classification of marsh types throughout our 122,995 ha survey area. Our initial coarse classification delineating coastal marsh from other habitat types was 92 % accurate. Intermediate, brackish, and saline marsh each comprised about 30 % of the coastal marsh in our study area. Freshwater marsh comprised <1 % and may have been underrepresented within the coastal zone due to placement of the inland boundary of our study area. Our final classification of marsh types was 77.2 % accurate which will provide a framework for further delineation efforts. We offer several considerations for future coastal marsh delineation efforts along the Texas coast.
Starting Page	653
Ending Page	660
Page Count	8
File Format	PDF
ISSN	02775212
Journal	Wetlands
Volume Number	34
Issue Number	4
e-ISSN	19436246
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-04-11
Publisher Institution	Society of Wetland Scientists
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Brackish marsh Freshwater marsh Intermediate marsh Plant community Remote sensing Saline marsh Coastal marsh Texas Freshwater & Marine Ecology Environmental Management Ecology Hydrogeology Coastal Sciences Landscape Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Environmental Chemistry

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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