EFFECT OF BARITE ON MEIOFAUNA IN A FLOW-THROUGH EXPERIMENTAL SYSTEM
EFFECT OF BARITE ON MEIOFAUNA IN A FLOW-THROUGH EXPERIMENTAL SYSTEM
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DOI：
10.1016/0141-1136(79)90014-x
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发表时间：
1979-01-01
影响因子：
3.3
通讯作者：
RAO, KR
中科院分区：
文献类型：
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作者：
CANTELMO, FR;TAGATZ, ME;RAO, KR
在实验流通系统中研究了重晶石（94-96% BaSO4）（海洋石油钻井作业中使用的钻井泥浆的主要成分）对小型动物的影响。含有沙子或不同比例的重晶石和沙子的水族馆连续 10 周接收来自佛罗里达州圣罗莎湾的未经过滤的海水。在此阶段结束时，确定了小型底栖动物的组成、生物量和垂直分布。大多数小型动物群 (> 99%) 出现在高度需氧的基质上部 2 厘米部分。轮虫类、有孔虫类、水螅类、涡虫类、介形类、多毛类和双壳类在对照和实验水族箱之间没有表现出显着差异。线虫纲、桡足纲和桡足纲无节幼体的密度随基质成分的不同而变化。含有 1:10 或 1:3 重晶石和沙子混合物的水族箱中的小型动物密度大于仅含有沙子的水族箱中的小型动物密度。在含有 5.5 厘米沙子并覆盖 0.5 厘米重晶石层的水族箱中，小型动物密度明显下降。
The effects of barite (94-96% BaSO4), a major constituent of drilling muds used in marine oil drilling operations, on meiofauna were studied in an experimental flow-through system. Aquaria containing sand or varying proportions of barite and sand received a continuous supply of unfiltered seawater from Santa Rosa Sound, Florida [USA] for 10 wk. At the end of this period the composition, biomass and vertical distribution of the meiofauna were determined. Most of the meiofauna (> 99%) occurred in the highly aerobic upper 2 cm portion of the substratum. Rotifera, Foraminifera, Hydrozoa, Turbellaria, Ostracoda, Polychaeta and Bivalvia did not exhibit significant differences between control and experimental aquaria. The densities of Nematoda, Copepoda and Copepoda nauplii varied with the substrate composition. The meiofaunal densities in the aquaria containing 1:10 or 1:3 mixtures of barite and sand were greater than that in aquaria containing sand alone. A marked decrease in meiofaunal density was evident in aquaria containing 5.5 cm of sand covered with a 0.5 cm layer of barite.