中国海洋浮游介形类的垂直结构

Vertical structure of planktonic Ostracoda in China seas

文本根据浮游介形类的昼夜垂直分布和分层调查资料 ,阐述浮游介形类的垂直结构 ,这是介形动物在漫长的历史过程中对环境适应的另一表征。介形类整个类群的丰度存在着白天下降 ,晚间上升的昼夜垂直移动总趋势 ,而不同物种具有不同的昼夜垂直运动型式。此外 ,从宏观上看 ,各物种具明显的层状分布 ,并形成上层分布型、中层分布型、次深层分布型、深层分布型和广深分布型等五种垂直分布类型。

Vertical structure of planktonic Ostracoda distribution in China Seas is described according to the data derived from the depth depended sampling in those seas. This typical structure probably reflected one of the features for the Ostracoda in a long term's adaptation to its inhabit. A trend of vertical migration downward at nightfall and upward at dawn was shown in abundance and diversity of the whole Ostracoda while different species showed its own patterns in day night vertical migrations. In general speaking, a depth depended distribution appeared for each species of the Ostracoda, thus forming 5 types of vertical distributions: up and middle pelagic types, sub abysmal and abysmal types and eurybathic types.