Terracing at Pierce Marsh in Galveston Bay 2001-2002

Description

Marsh terracing is used to restore coastal wetlands by converting shallow nonvegetated bottom to intertidal marsh. Terraces are constructed from excavated bottom sediments, and are commonly arranged in a checkerboard pattern of square cells with open corners to form terrace fields. The project was located in shallow estuarine waters, and used bottom sediments or upland soils to construct intertidal areas planted with smooth cordgrass, Spartina alterniflora. We used a quantitative sampling device to compare nekton densities and biomass in habitat types of marsh terraces of three cell sizes at Pierce Marsh in Galveston Bay to a nearby reference marsh. Within terrace cells, density, biomass, and species richness were generally higher in marsh vegetation than over nonvegetated bottom. We also used Geographic Information System (GIS) and high-resolution aerial photography to classify areas into land (marsh vegetation) and water and applied fishery density models to assess fishery support. These models describe finescale distribution patterns for brown shrimp Farfantepenaeus aztecus, white shrimp Litopenaeus setiferus, and blue crab Callinectes sapidus across shallow estuarine habitat types (emergent marsh and shallow open water) of Galveston Bay. We show that populations of most fishery species increase as cell size decreases. However, as cell size decreases, the cost of terrace construction increases much faster than population size. Therefore, terrace fields constructed of medium or large cells would be more cost effective in providing fishery habitat than would terraces composed of small cells. Based on our modeling results, restored sites supported relatively high populations of fishery species compared to pre-restoration conditions. However, restoration sites did not support populations’ equivalent to a reference marsh system. Restoration projects should maximize the area of marsh vegetation and create a high degree of water-marsh interspersion to provide the most benefit for fishery species.

Resources

Name Format Description Link
57 zip file on SEFSCc PARR Data Server containing all data files for this dataset and a readme file http://grunt.sefsc.noaa.gov/parr/10010.zip
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/10010
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/sefsc/dmp/pdf/10010.pdf
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
57 zip file on SEFSCc PARR Data Server containing all data files for this dataset and a readme file https://grunt.sefsc.noaa.gov/parr/10010.zip
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/10010
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/sefsc/dmp/pdf/10010.pdf
0 Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords

Tags

  • spartina alterniflora
  • non-vegetative bottom
  • distribution
  • 2001-2002
  • callinectes sapidus
  • galveston fisheries ecology projects
  • noaa
  • galveston bay
  • southeast fisheries science center
  • marsh terracing
  • doc/noaa/nmfs/sefsc
  • farfantepenaeus aztecus
  • gulf of mexico
  • u.s. department of commerce
  • texas
  • national marine fisheries service
  • abundance
  • cost to benefit
  • nursery habitats
  • litopenaeus setiferus
  • pierce marsh
  • modelling
  • fisheries independent data

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