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首页> 外文期刊>Oceanographic Literature Review >Change in zooplankton community in onagawa bay, northeastern japan after the tohoku earthquake and tsunami in 2011 off the pacific coast of japan
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Change in zooplankton community in onagawa bay, northeastern japan after the tohoku earthquake and tsunami in 2011 off the pacific coast of japan

机译：在2011年在日本东北地震和海啸之后，日本东北部奥戈瓦湾浮游湾社区的变迁

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Change in abundance and composition of the zooplankton community was studied at the innermost part of Onagawa Bay, northeastern Japan, before and after the Tohoku Earthquake and tsunami of 2011. Abundance of zooplankton groups did not drastically decrease just after the tsunami except for cladocerans and the larvae of benthic organisms. The decrease of the former may have been caused by their resting eggs being swept away by the tsunami or buried in the sediment just before their spring increase, while that of the latter by a population decline of their adults. The number of cladoceran species decreased from 7 to 5, with increasing dominance of Podon leuckarti after the tsu-nami. The percentage of the genera Acartia and Oithona, combined.was 73% of all copepod genera before the tsunami and increased to 85% after the tsunami. Zooplankton abundance increased with the increase of chlorophyll concentration from 2013, two years after the tsunami. The basic structure of the breakwater broken by the tsunami was recon-structed by the end of 2014 with a shallower sill depth, and the water exchange between the inside and outside of the breakwater became restricted. As a result, dissolved oxygen concentration decreased not only on the bottom but also in the water column and the species diversity of copepods decreased at the innermost station. Long-term monitoring should be continued.
机译：在日本东北部，东北地震和2011年海啸前后，研究了浮游动物群落的丰富和组成的变化和浮游动物群落的变化。除了Cladocerans之外，Zooplankton Group的丰富在海啸之外，浮游生物的丰富性没有急剧下降。底栖生物的幼虫。前者的减少可能是由他们休息的鸡蛋被海啸扫过的鸡蛋，或者在春天的增加前埋葬在沉积物中，而后者的人口衰落的人口衰落。 Cladoceran物种的数量从7到5减少，随着TSU-Nami之后的Podon Leuckarti的优势越来越高。世代Acartia和Oithona的百分比，组合。在海啸前的所有桡足动物的73％，在海啸后增加到85％。随着2013年的叶绿素浓度的增加，Zooplankton丰度在海啸后两年增加到2013年。海啸破坏的防堤的基本结构是由2014年底重建，较浅的门槛深度，防堤内外的水交换变得受到限制。结果，溶解的氧浓度不仅降低在底部，而且在水柱中，桡足类的物种在最内部的地区下降。应继续长期监测。

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    《Oceanographic Literature Review》 |2020年第9期|1983-1983|共1页
  • 作者

    Y. Endo;

  • 作者单位

    Graduate School of Agricultural Science Tohoku University Miyagi Sendai 980- 0845 Japan;

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