2010年夏末黄河口及其邻近水域浮游植物群落结构

为研究黄河调水调沙对黄河口水域浮游植物群落结构的影响，于2010年9月在黄河口及其邻近水域（119°03'~119°36'E，37°28'~38°09'N）开展了调查，研究了该水域浮游植物的种类组成、丰度分布、优势种以及群落多样性。结果显示，研究水域共记录浮游植物44属80种（包括14个未定种），其中硅藻门共39属68种（包括11个未定种），在种类数和丰度值上均占据绝对优势；甲藻门3属9种（包括1个未定种），蓝藻门1种（未定种），金藻门1属1种，绿藻门1属1种。本航次调查中浮游植物优势种有柔弱角毛藻（Chaetoceros debilis）、浮动弯角藻（Eucampia zodiacus）和叉状角藻（Ceratium furca）。调水调沙导致的调查水域营养盐变化对浮游植物群落结构有重要影响。该研究揭示了2010年黄河调水调沙后黄河口及其邻近水域浮游植物群落结构特征，丰富了该水域浮游植物群落的基础资料，为深入探讨河口环境变化对浮游植物群落乃至生态系统的影响提供了重要依据。

Phytoplankton community structure in the Yellow River estuary and its adjacent waters in late summer, 2010

To study the response of phytoplankton community to the water-sediment regulation in Yellow River in summer 2010, water samples were collected in the Yellow River estuary and its adjacent waters after the event.A total of 80 species (including 14 undetermined species) representing diatom, dinoflagellate, cyanobacteria, chrysophyte and chlorophytes were identified by microscopic analysis.Diatoms were dominant in all stations surveyed with 68 species identified and taking up 85% of the total phytoplankton.The main dominant species were Chaetoceros debili, Eucampia zodiacus and Ceratium furca in this survey. The changes of nutrients condition in the survey area affected the phytoplankton community structure significantly.This study provides fundamental information for further research about the influences of environmental changes on phytoplankton community in the Yellow River estuary and its adjacent area.