中国水产科学2017，Vol.24Issue(5)：913-921,9.DOI:10.3724/SP.J.1118.2017.17086
黄河口邻近海域浮游植物群落及其多样性的长期变化(1960-2010)
Long-term changes of phytoplankton community and diversity in adjoining waters of the Yellow River estuary (1960-2010)
摘要
Abstract
Based on 245 samples collected in 19 cruises from 1960 to 2010 in adjoining waters of the Yellow River estuary,the long-term changes of the phytoplankton community and diversity were analyzed.These samples were towed from the seafloor to the surface at each site by using a standard phytoplankton net and subsequently checked for the species composition and cell abundance under an optical microscope in the laboratory.A total of 108 species were recorded,of which 87 were diatoms and 17 were dinoflagellates.Chaetoceros spp.and Coscinodiscus spp.were the larger groups,with 27 and 10 species documented,respectively.The average total phytoplankton abundance during the last fifty years was 2.74× 106 ind/m3,with a peak of 16.8× 106 ind/m3 in the 1980s.Diatoms dominated the community in the last century,such as the large centric diatoms Chaetoceros spp.and Coscinodiscus spp.However,the species in this century shifted to pennate diatoms like Navicula spp.and Nitzschia closterium,as well as benthic species like Paralia sulcata.There was an increasing trend in abundance of the dinoflagellates Ceratium spp.,Noctiluca scintillans,and Protoperidinium spp.During the past fifty years,Coscinodiscus asteromphalus,Coscinodiscus radiatus,Coscinodiscus debilis,and Thalassionema frauenfeldii were dominant in the community.However,the composition of dominant phytoplanktons had indeed changed and shifted.Under the co-influence of the absence of river flow and a strong E1 Nifio event,the species abundances and diversity had decreased to the lowest levels during the last century,with average values only being 87.7×104 ind/m3 (Shannon-Weaver index=1.97).During this century,however,the phytoplankton community and diversity in the Yellow River estuary have been altering under human activity,such as water-sediment regulation,with a steady recovery of 2.3 times and 16.8％ increase over the levels at the end of the last century.This study on the long-term shift in phytoplankton community and diversity will provide a basic background for future protection of the estuarine ecosystem and enhancement of fishery resources in the adjoining waters of the Yellow River estuary.关键词
浮游植物/丰度/多样性/长期变化/黄河口Key words
phytoplankton/abundance/diversity/long-term changes/Yellow River estuary分类
农业科技引用本文复制引用
栾青杉,康元德,王俊..黄河口邻近海域浮游植物群落及其多样性的长期变化(1960-2010)[J].中国水产科学,2017,24(5):913-921,9.基金项目
公益性行业(农业)科研专项(201303050) （农业）
国家重点基础研究发展计划项目(2015CB453302) （2015CB453302）
“泰山学者”建设工程专项. （）
