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首页> 外文学位 >Benthic Invertebrate Communities of Barnegat Bay New Jersey: Effects of Hard-Clam (Mercenaria mercenaria L.) Aquaculture Grow-Outs on Benthic Communities
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Benthic Invertebrate Communities of Barnegat Bay New Jersey: Effects of Hard-Clam (Mercenaria mercenaria L.) Aquaculture Grow-Outs on Benthic Communities

机译：新泽西州巴内加特湾的底栖无脊椎动物社区：硬蛤养殖（Mercenaria mercenaria L.）水产养殖对底栖社区的影响

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摘要

Plots of three treatment types (industry-standard screens with clams, screens without clams, and control) were installed at Sedge Island, Barnegat Bay, in 2012. 177 species from eight phyla were collected. Hard-clam plots had lower Shannon-Weiner Index values and higher sedimentary sorting coefficients as compared to both control treatments. ANOSIM identified benthic communities inside hard clam plots as statistically distinct from the two control treatments. There was no significant effect of treatment on functional groups assigned by burrowing depth. Seasonal peaks in May are clear for Polydora cornuta and Tritia obsoleta, as well as for suspension feeders and omnivores. All burrowing-depth guilds except deep-burrowing taxa also peak in May. Grazer density, and Microdeutopus gryllotalpa in particular, peak in October. Shannon-Weiner and species richness do not differ significantly by season, though evenness is higher in August than May, reflecting the peaks of certain species evening out during the summer. The trends seen suggest bottom-up controls of the benthic invertebrate community structure in the Sedge Island area, which therefore has the potential to be disrupted either by the overconsumption of available seston from increased aquaculture or increased phytoplankton from increased eutrophication. These data can serve as a baseline for environmental monitors given either of these scenarios. These results do not provide any immediate reason to limit hard clam aquaculture acreage in the region. However, the observed increase in maldanid polychaetes and decrease in mobile suspension feeders could prove problematic if leasing acreage is increased. Full-scale within-industry research is recommended before increasing hard-clam aquaculture acreage, either as part of an environmental management strategy for eutrophication mitigation or for economic purposes.
机译：2012年，在Barnegat湾的Sedge Island上安装了三种处理类型的样地（工业标准的带蛤的筛子，无蛤的筛子和对照）。从8个门中收集了177种。与两种对照处理相比，硬蛤地块具有较低的香农-韦纳指数值和较高的沉积分选系数。 ANOSIM确定硬蛤地块内的底栖生物群落在统计学上不同于两种对照处理。治疗对穴位深度分配的功能组没有显着影响。五月份的波多拉多角corn和Tritia obsoleta以及悬浮喂食器和杂食动物的季节性高峰是明显的。除深洞穴类群外，所有深洞穴行会也在5月达到顶峰。 Grazer密度，尤其是Microdeueutopus gryllotalpa，在10月达到峰值。 Shannon-Weiner和物种丰富度在季节上没有显着差异，尽管8月的均匀度高于5月，反映出某些物种在夏季傍晚达到高峰。所看到的趋势表明，塞奇岛地区底栖无脊椎动物群落结构的自下而上控制，因此有可能因水产养殖增加而过量使用可用的鱼或富营养化增加而使浮游植物增加而受到干扰。在这些情况下，这些数据可以用作环境监控器的基准。这些结果并未提供任何直接的理由来限制该地区硬蛤养殖的面积。但是，如果增加租赁面积，则可以观察到的马尔代尼多毛蟹的增加和流动悬浮饲料的减少可能会带来问题。建议在增加硬壳养殖面积之前进行全面的行业内研究，以作为减轻富营养化或出于经济目的的环境管理策略的一部分。

著录项

  • 作者

    Shell, Rebecca.;

  • 作者单位

    Montclair State University.;

  • 授予单位 Montclair State University.;
  • 学科 Environmental management.;Aquatic sciences.;Ecology.
  • 学位 Ph.D.
  • 年度 2018
  • 页码 153 p.
  • 总页数 153
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 等离子体物理学;
  • 关键词

  • 入库时间 2022-08-17 11:53:02

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