pelagic zone

基本解释

The mean wet weight per algae cell is reduced by 63. 6% in pelagic zone and 75. 4% in bay area after an interval of about 7 years.
藻类种类小型化现象十分明显，相隔6～7年，小型藻类的种类及其数量越来越多，单个藻细胞鲜重的平均值在敞水区和库湾区分别减少了63.6％和75.4％；
We're doing variety of studies from deepwater habitats to the pelagic zone to the shoreline, and it's going to take some time to figure it out.
他说：“我们在深海区，浮游海区和海岸做了各种各样的调查，要弄明白结果如何还需时日。”
This is less than the total biological production in the main water column, or pelagic zone, which scientists believe to be between around 0.6 and 1.8 gigatonnes of carbon per year.
它比主水体或深海区动物产物——科学家们认为，其总数在每年约6千万到1亿8千万吨碳——的总数要少。