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:
    title: Floodplain River Food Webs in the Lower Mekong Basin
  name:
    name part: Ou, Chouly
    role:
      role term: creator
    role:
      role term: author.
  name:
    name part: Winemiller, Kirk O.
    name part: 1956-
    role:
      role term: thesis advisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2014
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: The Mekong River is one of the world's most important rivers in terms of its size, economic importance, cultural significance, productivity, and biodiversity. The Mekong River's fisheries and biodiversity are threatened by major hydropower development and over-exploitation. Knowledge of river food web ecology is essential for management of the impacts created by anthropogenic activities on plant and animal populations and ecosystems. In the present study, I surveyed four tropical rivers in Cambodia within the Mekong River Basin. I examined the basal production sources supporting fish biomass in the four rivers during the dry and wet seasons and explored the relationship between trophic position and body size of fish at various taxonomic levels, among local species assemblages, and across trophic guilds. I used stable isotopes of carbon and nitrogen to estimate fish trophic levels and the principal primary production sources supporting fishes. My study provides evidence that food web dynamics in tropical rivers undergo significant seasonal shifts and emphasizes that river food webs are altered by dams and flow regulation. Seston and benthic algae were the most important production sources supporting fish biomass during the dry season, and riparian macrophytes appeared to be the most important production source supporting fishes during the wet season. In the river with strong flow regulation from an upstream impoundment, seston and benthic algae were even more important production sources supporting fishes during the dry season. My findings challenge the Eltonian theory of size-based trophic structure in food webs and also contradict the broadly accepted prediction of the fishing-down-the-food-web concept. Eltonian and fishing-down-the-food-web concepts propose that trophic level is strongly correlated with body size, but I found no significant correlation between body size and trophic position for fish assemblages. Results suggest that body size distributions are not…
  note: by Chouly Ou.
  note: "Major Subject: Wildlife and Fisheries Sciences"
  note: Includes vita.
  note: Doctor of Philosophy Texas A & M University 2013 http://hdl.handle.net/1969.1/151776
  note: Includes bibliographical references.
  note: Text (Dissertation)
  subject:
    topic: Major Wildlife and Fisheries Sciences
  subject:
    topic: Primary production sources
  subject:
    topic: Trophic position
  subject:
    topic: Stable isotopes
  subject:
    topic: Fisheries
  identifier: http://hdl.handle.net/1969.1/151776
  record info:
    record content source: TXA
    record creation date: 140627
    record change date: 20151206101910.0
    record identifier: in00003474078
    language of cataloging:
      language term: eng