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利用 1 998年“大洋一号”调查船 DY95 - 8航次在中国多金属结核开辟区东、西两小区用多管取样器采集的沉积物样品 ,对小型底栖动物的组成、分布及其与环境因子的关系进行了研究。结果表明 :(1 )东、西两小区共有 1 6个类群的小型底栖动物 ,其中线虫类占居显著优势 ,在东、西两小区各占总栖息密度的 71 %和 6 4 %,其次为猛水蚤类和蜱螨类。 (2 )东、西两小区小型底栖动物类群平均栖息密度分别为 3 2 .47ind/1 0 cm2 和 1 8.0 5 ind/1 0 cm2 ,东小区高于西小区。小区各站位间的栖息密度平面分布差异显著。 (3 )东、西两小区小型底栖动物类群栖息密度的垂直分布趋势明显 ,由表层向底层 ,栖息密度逐渐降低。 (4)东、西两小区小型底栖动物空间分布与底质沉积物、结核覆盖率和底层流等环境因子密切相关 ,底质较硬、结核覆盖率较高以及底层流较强都不利于小型底栖动物的栖息。
The sediment samples collected by multi-tube samplers in the east and west of China’s polymetallic nodule development area were used to analyze the composition and distribution of meiofauna and their relationships with Environmental factors were studied. The results showed that: (1) There were 16 macro-zoobenthos in the eastern and western communities, of which nematodes accounted for 71% and 64% of the total habitat density in the eastern and western communities respectively, followed by For fleas and acarina. (2) The average macro-habitat density of the benthic macrobenthos in the eastern and western communities are respectively 32.47 ind / 1 0 cm2 and 1 8.05 ind / 1 0 cm2, and the eastern community is higher than the western community. There is significant difference in the distribution of habitat density between stations in the district. (3) The vertical distribution trend of the habitat density of the macro-zoobenthos in the eastern and western communities is obvious. From the surface to the bottom, the habitat density gradually decreases. (4) The spatial distribution of meiofauna in eastern and western communities is closely related to environmental factors such as sediment sediment, tuberculosis coverage and bottom flow, with hard sediment, high tuberculosis coverage and strong bottom flow Small zoobenthos habitat.