rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: The
    title: effect of cattle grazing on the abundance and distribution of selected macroinvertebrates in west Galveston Island salt marshes
  name:
    name part: Martin, Jennifer Lynn
    name part: 1973-
    role:
      role term: creator
  name:
    name part: Linton, Thomas L.
    role:
      role term: thesis advisor.
  name:
    name part: Wardle, William J.
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2003
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: The effect of cattle grazing on the abundance and distribution of vegetation, burrowing crabs (Uca rapax, Uca pugnax, and Sesarma cinereum), marsh periwinkles (Littoraria irrorata), horn snails (Cerithidea pliculosa), and salt marsh snails (Melampus bidentatus) was evaluated over four seasons (summer 2000, fall 2000, winter 2001, and spring 2001) in grazed and ungrazed treatments. A Galveston Island salt marsh adjacent to Snake Island Cove was sampled at five elevations, from the water's edge to the high tidal flats. Data were analyzed for statistical differences using a two-way ANOVA in SAS. Cattle grazing may affect the vegetation and macroinvertebrate communities in salt marshes through trampling and herbivory. Vegetation resources available to other herbivores are decreased by the direct consumption of plant material by cattle. Spartina alterniflora and Salicornia virginica heights were significantly greater in ungrazed treatments than grazed for every season in the edge, upper, and middle elevation zones. Total aerial vegetative cover was also reduced significantly in grazed treatments, with the greatest impact in the edge and upper marsh. In the ungrazed treatments, S. alterniflora stem density was significantly greater in edge elevations, while both S. virginica percent cover and stem density in the edge elevation was greater. Burrowing crab populations were greater in the upper marsh and edge habitat of ungrazed treatments, while significantly greater in most of the middle marsh habitats of the grazed treatment. Size of burrowing crabs was generally significantly greater in ungrazed treatments. Cerithidea pliculosa size decreased in grazed treatments, but population had an overall increase in grazed treatments. Littoraria irrorata had very few differences between treatments, although few specimens were found. Melampus bidentatus populations were too small to evaluate thoroughly. Macroinvertebrate populations could be used to assess the overall health of graz…
  note: by Jennifer Lynn Martin.
  note: "Major Subject: Wildlife and Fisheries Sciences"
  note: Title from author supplied metadata.
  note: Electronic resource.
  note: M.S. Texas A & M University 2003.
  note: Includes bibliographical references.
  note: Text (Thesis).
  subject:
    topic: Major wildlife and fisheries sciences
  subject:
    topic: grazing
  subject:
    topic: salt marsh
  subject:
    topic: Spartina alterniflora
  subject:
    topic: Salicornia virginica
  subject:
    topic: Salicornia bigelovii
  subject:
    topic: Batis maritima
  subject:
    topic: Uca rapax
  subject:
    topic: Uca pugnax
  subject:
    topic: fiddler crabs
  subject:
    topic: Sesarma cinereum
  subject:
    topic: marsh crab
  subject:
    topic: Cerithidea pliculosa
  subject:
    topic: horn snail
  subject:
    topic: Littoraria irrorata
  subject:
    topic: marsh periwinkle
  subject:
    topic: Melampus bidentatus
  subject:
    topic: salt marsh snai
  identifier: http://hdl.handle.net/1969.1/179
  record info:
    record content source: TXA
    record creation date: 040301
    record change date: 20151026051617.0
    record identifier: in00001801489