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A toxicological assessment of two aquatic ecosystems in the greater Houston area. Part I: Risk assessment of Buffalo Bayou. Part II: Water quality assessment of the mariculture ponds of Sea Center Texas.

机译:大休斯顿地区两个水生生态系统的毒理学评估。第一部分:布法罗河口的风险评估。第二部分:德克萨斯州海中心海水养殖池的水质评估。

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摘要

Aquatic toxicology is explored in this study by an in depth assessment of two distinctly different aquatic Ecosystems. Buffalo Bayou, a tributary of Houston that develops into the Houston Ship Channel, is under increasing Anthropogenic stress—industrial, commercial, navigational, and domestic. Part I of this study characterizes the organic pollutants that have accumulated over the years in the sediment compartment of the Buffalo Bayou ecosystem. Part II assesses the water chemistry and profiles the physicochemical character of the mariculture ponds at Sea Center Texas in an attempt to improve the survival and growth of the red drum fry while comparing attributes of two aeration devices—The industry standard Paddlewheel and the newly patented microbubble technology the Aerob-a-jet™.; Contamination of bottom sediments by toxic chlorinated pesticides and polynuclear aromatic hydrocarbons was observed in Buffalo Bayou. The chlorinated pesticides found include heptachlor epoxide, gama-chlordane, alpha-chlordane, endosulfan II, and endrin aldehyde. The polynuclear aromatic hydrocarbons found in analyzed sediment samples were phenanthrene, fluoranthene, pyrene, benz[a]anthracene, benzo[k]fluoranthene, and benzo[a]pyrene. Concentrations of these contaminants were significantly higher east of Downtown Houston near the turning basin of the Houston Ship Channel. The risk assessment of PAH toxicity was determined to be an imminent ecological threat to the Buffalo Bayou Aquatic Ecosystem.; In the mariculture study at Sea Center Texas, it was concluded that the most critical stage in the process of raising red drum fingerlings is the transition period between the incubator stage and their stocking into the rearing pond. It is vital to the survival of the fry that the dissolved oxygen levels of newly stocked ponds are maintained between 6–8 mg/L, and the zooplankton colony is maintained at a count 2000–3000 organisms/L for the first 5 days of the fry's life in the rearing pond. Furthermore, it was concluded that the Aerob-a-jet™ was more appropriately designed for aeration of the water column during the initial days, the most critical stage, of stocking red drum larva into mariculture rearing ponds.
机译:本研究通过对两个截然不同的水生生态系统进行深入评估来探索水生毒理学。布法罗河口(Buffalo Bayou)是休斯敦的支流,后来发展成为休斯敦船舶航道,其人为压力日益增大,包括工业,商业,航海和家庭。这项研究的第一部分描述了多年来在布法罗河口生态系统沉积物区中积累的有机污染物。第二部分评估了水的化学性质,并介绍了德克萨斯州海中心的海水养殖池塘的理化特性,以期在比较两种充气设备(行业标准的桨轮和新专利的微气泡)的属性的同时,改善红鼓鱼的生存和生长。技术Aerob-a-jet™。在布法罗巴约,观察到有毒的氯化农药和多核芳烃对底部沉积物的污染。发现的氯化农药包括七氯环氧化物,伽马-氯丹,α-氯丹,硫丹II和异狄氏剂醛。在分析的沉积物样品中发现的多核芳香烃为菲,荧蒽,pyr,苯并[a]蒽,苯并[k]荧蒽和苯并[a] py。这些污染物的浓度明显高于休斯顿市区以东靠近休斯顿船舶航道的转弯盆地。多环芳烃毒性的风险评估被确定为对布法罗巴尤水生生态系统的迫在眉睫的生态威胁。在德克萨斯州海洋中心的海水养殖研究中,得出的结论是,在养红鼓鱼种的过程中,最关键的阶段是孵化器阶段与将它们放养到饲养池塘之间的过渡时期。对新鱼的生存至关重要的是,新养池塘的溶解氧水平应保持在6-8 mg / L之间,浮游动物头5天的浮游动物菌落数量应保持在2000-3000生物/ L。鱼苗在饲养池中的生活。此外,得出的结论是,Aerob-a-jet™更合适地设计用于在将红鼓幼虫放养到海水养殖池的最关键阶段即最关键的阶段为水柱充气。

著录项

  • 作者

    Thomas, Renard L.;

  • 作者单位

    Texas Southern University.;

  • 授予单位 Texas Southern University.;
  • 学科 Environmental Sciences.; Agriculture Fisheries and Aquaculture.; Engineering Environmental.
  • 学位 Ph.D.
  • 年度 2001
  • 页码 120 p.
  • 总页数 120
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 X1;S9;X5;
  • 关键词

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