The distribution of benthic infauna of a Texas salt marsh in relation to the marsh edge

dc.acquisition-srcDownloaded from-Web of Scienceen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorWhaley SDen_US
dc.contributor.authorMinello TJen_US
dc.contributor.otherWetlandsen_US
dc.date.accessioned2010-02-15T17:16:59Z
dc.date.available2010-02-15T17:16:59Z
dc.date.issued2002 Decen_US
dc.degreeen_US
dc.description753-766en_US
dc.description-otheren_US
dc.description.abstractCoastal salt marshes in the northern Gulf of Mexico are often highly fragmented, with a large amount of marsh edge, the interface between the vegetated marsh surface and shallow open water. Nekton predators, including many juvenile fishery species, aggregate near this marsh edge, and benthic infaunal populations are a primary source of prey for many of these predators. We examined the fine-scale (1-10 m) distributions of benthic infauna in relation to the edge of a Texas, USA salt marsh. Every six weeks for nearly a year, we sampled marsh sediments at five locations: on nonvegetated bottom 1 m from the marsh edge and on the vegetated marsh surface at 1, 3, 5, and 10 m from the edge. Surface-dwelling annelid worms and peracarid crustaceans were most abundant in low-elevation sediments near the marsh edge for most sampling periods. Because the marsh slope varied within the study area, we could distinguish between correlative relationships with elevation and distance from the marsh edge. Distributions of common surfaced-welling species were often unrelated to elevation but almost always negatively related to distance from the marsh edge. Abundances of near-surface direct deposit feeders and omnivores were related to both distance from edge and elevation. In contrast to surface dwellers, densities of abundant subsurface deposit feeders (mainly oligochaetes) were frequently greatest in sediments located away from the marsh edge. Surface and near-surface dwelling infauna are an important prey resource for nekton, including many juvenile fishery species that concentrate near the marsh edge. Populations of these infaunal prey fluctuated seasonally, with the greatest densities occurring during winter and early spring when predator abundances are generally low. Infaunal densities decreased dramatically near the marsh edge from the late spring through early fall, and this decrease coincides with historically high seasonal densities of nekton predators. Our data suggest that there is a strong trophic link between infauna and nekton near the marsh edge and that this relationship contributes to the high fishery productivity derived from Gulf Coast marshesen_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23428
dc.latitudeen_US
dc.locationen_US
dc.longitudeen_US
dc.notesTimes Cited: 2ArticleEnglishWhaley, S. DFlorida Marine Res Inst, 100 8th Ave SE, St Petersburg, FL 33701 USACited References Count: 80632YU810 E TENTH ST, P O BOX 1897, LAWRENCE, KS 66044 USALAWRENCEen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries51075.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectsalt marshen_US
dc.subjectbenthic infaunaen_US
dc.subjectpolychaetesen_US
dc.subjectEDGEen_US
dc.subjectelevationen_US
dc.subjectSpartina alterniflora marshen_US
dc.subjectoligochaetesen_US
dc.subjectCORDGRASS SPARTINA-ALTERNIFLORAen_US
dc.subjectPENAEUS-AZTECUS IVESen_US
dc.subjectSMALL-SCALE PATTERNSen_US
dc.subjectFUNDULUS-HETEROCLITUSen_US
dc.subjectNORTH-CAROLINAen_US
dc.subjectTIDAL MARSHen_US
dc.subjectGALVESTON BAYen_US
dc.subjectBROWN SHRIMPen_US
dc.subjectNEKTON USEen_US
dc.subjectSELECTIVE PREDATIONen_US
dc.titleThe distribution of benthic infauna of a Texas salt marsh in relation to the marsh edgeen_US
dc.typeJournalen_US
dc.universityen_US
dc.vol-issue22(4)en_US

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