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首页> 外文学位 >THE SEASONAL DISTRIBUTION OF MACROBENTHOS AND SEDIMENTS CHRONICALLY IMPACTED BY OIL/GAS FIELD PRODUCED WATER (ESTUARINE POLLUTION, PETROLEUM WASTE).
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THE SEASONAL DISTRIBUTION OF MACROBENTHOS AND SEDIMENTS CHRONICALLY IMPACTED BY OIL/GAS FIELD PRODUCED WATER (ESTUARINE POLLUTION, PETROLEUM WASTE).

机译：受油/气田产生的水（雌激素污染，石油废料）长期影响的巨鼻鱼和沉积物的季节分布。

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摘要

Little is known about how climatic events (i.e., heavy rain, drought, etc.) inhibit or enhance movement of petroleum hydrocarbon laden sediments in estaurine systems and how this in turn effects the macrobenthic populations exposed to them. Seventeen collection stations were established and monitored at New Bayou, Texas, a small gradient estuary which receives petroleum products via oil/gas field produced water discharge. Hydrographic, geologic and biotic samples were taken monthly from each station during a period of reduced rainfall (May 1980 - April 1981) and during a period of heavy rainfall and subsequent bayou flushing (May 1981 - August 1981).;Sediment grain sizes along the bayou were generally in the silty-clay range from May 1980 to April 1981, and were altered into the clayey-silt range with the onset of bayou flushing. Sediment hydrocarbons concentrations were highest (11.4 mg/g dry sediment) around the produced water discharge site and lowest at near-bay stations (0.2 mg/g dry sediment). Bayou flushing resuspended the hydrocarbon laden sediments and carried them downstream and out of the system.;Ninety-six macrobenthic species (91,594 individuals) were collected during the study. General effects from produced water discharge on macrobenthic populations followed the classical pattern outlined by other research. A sediment hydrocarbon concentration of 2.5 mg/g dry sediment was found to reflect the average value needed to depress population abundances. Both abundance and diversity values were lowest at central stations near the discharge site.;Bayou flushing significantly altered the community composition along the bayou. Freshwater species invaded stations further downstream, and the previous ubiquitous species component was pushed downstream towards the higher salinities. Percent composition of the polychaetes decreased while insect percent composition increased. An influx of adult organisms was noted at the central stations after hydrocarbon laden sediments were removed, but no true community was ever established.;Both temperature and dissolved oxygen data taken during the study followed patterns typical for the area. Salinity values increased into the polyhaline range at near-bay stations during the reduced rain period, while upper bayou stations remained within the oligohaline range. A rapid decrease in salinity was noted at all stations following bayou flushing.
机译：对于气候事件（即大雨，干旱等）如何抑制或增强在河口系统中富含石油烃的沉积物的运动以及这又如何影响暴露于它们的大型底栖动物种群知之甚少。在德克萨斯州的新河口建立了17个采集站并对其进行监控，这是一个小坡度河口，通过油气田产出的水排放来接收石油产品。在降雨减少的时期（1980年5月至1981年4月），暴雨期间以及随后的河滩冲洗（1981年5月至1981年8月），每月从每个站点采集水文，地质和生物样品。从1980年5月到1981年4月，尤普遍处于粉质黏土范围，随着ba尤潮红的发生，尤被改变为黏土粉砂质范围。产出水排放点附近的沉积物碳氢化合物浓度最高（11.4 mg / g干沉积物），而在近湾站最低（0.2 mg / g干沉积物）。 Bayou冲洗使重载含碳氢化合物的沉积物重新悬浮，并将其带入系统的下游。;在研究过程中，收集了96种大型底栖动物（91,594个个体）。产水排放对大型底栖动物种群的一般影响遵循其他研究概述的经典模式。发现2.5 mg / g干燥沉积物的沉积物碳氢化合物浓度反映了降低种群数量所需的平均值。排泄点附近的中心站的丰度和多样性值均最低。Bayou冲洗显着改变了Bayou沿岸的群落组成。淡水物种入侵了更下游的台站，先前普遍存在的物种成分被推向下游，向着更高的盐度方向发展。 cha的百分组成减少，而昆虫的百分组成增加。去除含碳氢化合物的沉积物后，在中心站注意到大量成年生物涌入，但从未建立真正的群落。研究期间采集的温度和溶解氧数据均遵循该地区的典型模式。在减少降雨期间，近湾站的盐度值增加到多卤度范围内，而高油层站的盐度值仍保持在低卤度范围内。冲洗后所有部位的盐度迅速下降。

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  • 作者

    NANCE, JAMES MILTON.;

  • 作者单位

    Texas A&M University.;

  • 授予单位 Texas A&M University.;
  • 学科 Biology Ecology.
  • 学位 Ph.D.
  • 年度 1984
  • 页码 285 p.
  • 总页数 285
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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