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The impact of the eastern oyster (Crassostrea virginica ) on growth and recruitment of the seagrass Halodule Wrightii.

机译:东部牡蛎(Crassostrea virginica)对海草Halodule Wrightii生长和募集的影响。

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摘要

Interactions between seagrasses and benthic filter-feeders may have significant impacts on the extent of benthic primary production. I used field experiments to determine the effect of oyster density on the abundance and growth rate Halodule wrightii in Mississippi Sound, AL. Oysters were deployed at densities of 0, 15, 75, and 150 m-2 in 1 m-2 plots of H. wrightii in September 2004. Shoalgrass shoot density, growth rate, total suspended solids, porewater nutrients, light transmittance, and epiphyte loads were measured from October through December 2004, and June through July 2005. Results showed no significant relationship between oyster density and light transmittance, TSS, epiphyte loads, or seagrass recruitment. A significant positive relationship existed between oyster density and porewater NH4 and PO4. Growth rates were highest at intermediate densities of oysters, while high oyster densities negatively impacted growth rates, shoot densities, and plant biomass.
机译:海草和底栖滤食动物之间的相互作用可能对底栖初级生产的范围产生重大影响。我使用野外实验来确定牡蛎密度对阿拉斯加州密西西比湾的丰度和生长速度的影响。 2004年9月,牡蛎在密度为1 m-2的H. wrightii地块中以0、15、75和150 m-2的密度进行了部署。浅草的枝条密度,生长速率,总悬浮固体,孔隙水养分,透光率和附生植物在2004年10月至2004年12月以及2005年6月至2005年7月测量了鱼的负载。结果表明,牡蛎密度与透光率,TSS,附生植物负载或海草募集之间无显着关系。牡蛎密度与孔隙水NH4和PO4之间存在显着的正相关关系。在牡蛎的中等密度下,生长速率最高,而牡蛎的高密度对生长速率,枝条密度和植物生物量产生负面影响。

著录项

  • 作者

    Booth, Dale M.;

  • 作者单位

    University of South Alabama.;

  • 授予单位 University of South Alabama.;
  • 学科 Biology Ecology.; Biology Oceanography.
  • 学位 M.S.
  • 年度 2006
  • 页码 90 p.
  • 总页数 90
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 生态学(生物生态学);海洋生物;
  • 关键词

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