Nekton of New Seagrass Habitats Colonizing a Subsided Salt Marsh in Galveston Bay, Texas

dc.acquisition-srcen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorKing, Seth Pen_US
dc.contributor.authorSheridan, Pen_US
dc.contributor.otherEstuaries and Coastsen_US
dc.date.accessioned2010-02-15T16:46:09Z
dc.date.available2010-02-15T16:46:09Z
dc.date.issuedApr. 2006en_US
dc.degreeen_US
dc.descriptionpgs. 286-296en_US
dc.description-otheren_US
dc.description.abstractSubsidence and erosion of intertidal salt marsh at Galveston Island State Park, Texas, created new areas of subtidal habitat that were colonized by seagrasses beginning in 1999. We quantified and compared habitat characteristics and nekton densities in monospecific beds of stargrass Halophila engelmanni and shoalgrass Halodule wrightii as well as adjacent nonvegetated substrates. We collected 10 replicates per habitat type during April, July, October, and December 2001. Most habitat characteristics varied with season. Water temperature, salinity, and dissolved oxygen were similar among habitat types. Turbidity and depth were greatest in H. engelmanni beds and least in H. wrightii beds. H. engelmanni exhibited shorter leaves and higher shoot density and biomass core super(-1) than H. wrightii. Densities of almost all dominant species of nekton (fishes and decapods) were seasonally variable, all were higher in seagrass habitats than in nonvegetated habitats, and most were higher in one seagrass species than the other. Naked goby Gobiosoma bosc, code goby Gobiosoma robustum, bigclaw snapping shrimp Alpheus heterochaelis, and blue crab Callinectes sapidus were most abundant in H. engelmanni. Brown shrimp Farfantepenaeus aztecus, brackish grass shrimp Palaemonetes intermedius, and daggerblade grass shrimp Palaemonetes pugio were most abundant in H. wrightii. Pinfish Lagodon rhomboides and pink shrimp Farfantepenaeus duorarum were equally abundant in either seagrass. Most dominant nekton varied in size by month, but only two (L. rhomboides and C. sapidus) exhibited habitat-related differences in size. Nekton densities in these new seagrass habitats equaled or exceeded densities associated with historical and current intertidal smooth cordgrass Spartina alterniflora marsh. Continued seagrass expansion and persistence should ensure ecosystem productivity in spite of habitat change.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeGalveston Bayen_US
dc.history1-15-09 kswen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/18531
dc.latitudeen_US
dc.locationNot available in house - Please contact GBIC for assistanceen_US
dc.longitudeen_US
dc.notesen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries10054.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectaquatic plantsen_US
dc.subjectcoastal erosionen_US
dc.subjectcoastal zoneen_US
dc.subjecthabitaten_US
dc.subjectnektonen_US
dc.subjectsalt marshesen_US
dc.subjectseagrassen_US
dc.subjectsubsidenceen_US
dc.subjectturbidityen_US
dc.titleNekton of New Seagrass Habitats Colonizing a Subsided Salt Marsh in Galveston Bay, Texasen_US
dc.typeArticleen_US
dc.universityen_US
dc.vol-issue29(2)en_US
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