中文摘要：

海洋的生物多样性响应改变的物理环境，随后的生态的变化以及人为的骚乱正在变化。在这研究，在 situ 的浮游植物样品在 1999 和 2010 的 7 月在 Bering 海收集了被分析获得在浮游植物社区动力学的这十年，和关联的开始和结束之间的浮游植物社区结构和空间时间的变化，环境因素被调查。5 个部门， 58 个类和属于 3 个生态的组的浮游植物的 153 种类的一个总数被识别。绝大多数浮游植物为 66.7% 全部的种类和 95.2% 全部的丰富由硅藻财务组成了。就在空间程度和浮游植物样品类型的区别而言，在种类作文有微妙的变化，在在二之间的空间分发的在丰富和重要变化的大改变调查。当潜水艇山峰在 Bering 海盆被发现时，丰富山峰区域在白令海峡被定位。北方适度的硅藻是主导的植物群，它被广温性、寒冷水的硅藻随后代替。在 Bering 海的浮游植物社区不是一个单一的一致社区，但是深海洋的集合和浅海的集合创作了。深海洋的集合位于西北的太平洋和 Bering 海盆，由北方适度的种类统治了(Neodenticula seminae， Thalassiothrix longissima， Amphiprora 严寒， Chaetoceros atlanticus， Thalassiosira trifulta，等等) 并且散布很广的种类(Thalassionema nitzschioides， Ch。compressus， Rhizosolenia styliformis，等等) ，并且由低丰富，甚至 interspecies 丰富分配，多样的主导的种类和高种类差异描绘了。浅海的集合在大陆人架和 Bering 海的斜坡上被散布并且主要由寒冷水的种类组成(Th。nordenski ? ldii， Ch。furcellatus， Ch。socialis， Bacteriosira fragilis，等等) 并且广温性、能在不同盐分之环的种类(L。danicus， Ch。curvisetus， Coscinodiscus curvatulus，等等) ，并且它被高丰富，不平的 interspecies 分配，突出的主导的种类和低种类差异描绘。在 Bering 海的种类作文和许多浮游植物的空间时间的变化被表?

英文摘要：

Marine biodiversity is changing in response to altered physical environment, subsequent ecological changes as well as anthropogenic disturbances. In this study, phytoplankton samples in situ collected in the Bering Sea in July of 1999 and 2010 were analyzed to obtain phytoplankton community structure and spatial-temporal variation between the beginning and end of this decade, and the correlation of phytoplankton community dynamics and environmental factors was investigated. A total of 5 divisions, 58 genera and 153 species of phytoplankton belonging to 3 ecological groups were identified. The vast majority of phytoplankton consisted of diatoms accounting for 66.7% of the total species and 95.2% of the total abundance. Considering differentiation in spatial extent and phytoplankton sample types, there were subtle changes in species composition, large altering in abundance and significant variation in spatial distribution between two surveys. The abundance peak area was located at the Bering Strait while sub peak was found at the Bering Sea Basin. The boreal-temperate diatom was the dominant flora, which was subsequently replaced by eurythermal and frigid-water diatom. Phytoplankton community in the Bering Sea was not a simplex uniform community but composed of deep-ocean assemblage and neritic assemblage. The deep-ocean assemblage was located in the northwestern Pacific Ocean and Bering Sea Basin, dominated by boreal-temperate species（Neodenticula seminae, Thalassiothrix longissima, Amphiprora hyperborean, Chaetoceros atlanticus, Thalassiosira trifulta, etc.） and eurychoric species（Thalassionema nitzschioides, Ch. compressus, Rhizosolenia styliformis, etc.）, and characterized by low abundance, even interspecies abundance allocations, diverse dominant species and high species diversity. The neritic assemblage was distributed on the continental shelf and slope of Bering Sea and was mainly composed of frigid-water species（Th.nordenski？ldii, Ch. furcellatus, Ch. socialis, Bacteriosira fragilis, etc.） and