| 杭州地区17座水库浮游植物群落组成及其与环境因子的关系 |
| Phytoplankton Communities and their Relationship with Environmental Factors in 17 Medium and Large Reservoirs in Hangzhou |
| 投稿时间：2014-06-11 修订日期：2014-07-11 |
| DOI：10.15928/j.1674-3075.2015.01.004 |
| 中文关键词:浮游植物 群落组成 环境因子 水库 典范对应分析 营养状态指数 |
| 英文关键词:phytoplankton community structure environmental factors reservoir canonical correlation analysis (CCA) trophic state index (TLI) |
| 基金项目:杭州市环境保护科研计划重大项目（2010116）；杭州市科技发展计划项目（20091133B11） |
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| 中文摘要: |
| 于2008年和2009年的丰水期（8月）和枯水期（12月）分别对杭州地区17座大中型水库进行采样调查。结果表明，浮游植物有85种，其中绿藻最多，有29 种，硅藻26种，蓝藻15种，裸藻6种，隐藻、甲藻和金藻各3种。各水库浮游植物年均密度为1.27×106～6.55×106 个/L，最高密度为1.21×107个/L，最低密度为1.68×105 个/L。叶绿素a浓度年均值为2.86～28.35 μg/L，最高浓度为33.6 μg/L，最低浓度为1.36 μg/L；丰水期浮游植物密度和叶绿素a浓度高于枯水期。多数水库丰水期优势种为蓝藻，枯水期优势种为硅藻；各水库间浮游植物密度无显著差异，但叶绿素a浓度差异显著。从营养状态指数（TLI）、浮游植物密度及叶绿素a浓度等综合分析，杭州地区17座大中型水库基本处于中营养－轻度富营养状态。对浮游植物群落组成及动态与环境因子之间的关系进行典范对应分析（CCA），发现营养盐和透明度对浮游植物的增长起到关键作用。 |
| 英文摘要: |
| The reservoir has gradually taken on the role of drinking water supply instead of flood control, irrigation and power generation for the serious water pollution of rivers and lakes. The deterioration of water quality in the Qiantang River and the Tiaoxi River in the Hongzhou area threatens the drinking water supply in the region. Decision-making departments consider reservoir water as a feasible and safe water resource of water supply for this area. Seventeen reservoirs along the Qiantang River and the Tiaoxi River were selected according to the distribution of water resources in Hangzhou. Our study investigated the phytoplankton community of the 17 medium and large reservoirs, analyzed the relationship between phytoplankton and nutrient status of the water body and provided basic information and data for water resources protection and drinking water safety. The phytoplankton samples were selected during flood season (August) and dry season (December) in 2008 and 2009.Qualitative phytoplankton samples were taken with 25μm plankton nets from different directions and at different depth. 1L samples for quantitative analysis were collected 0.5m below the surface, then concentrated and identified after settling. Physical and chemical factors were measured including the water temperature (WT), water transparence (SD), pH, dissolved oxygen (DO), chemical oxygen demand ( CODMn), total nitrogen (TN), ammonia nitrogen(NH3-N) , total phosphorus (TP), soluble phosphorus (DP) and soluble silica (DSi). Chlorophyll a was determined by spectrophotometry. A total of 85 species of phytoplankton in 7 phyla were collected and the species were dominated by Chlorophyta (29), followed by Bacillariophyta (26), Cyanophyta (15), Euglenophyta (6), Cryptophyta (3)， Pyrrophyta (3) and Chrysophyta (3). Phytoplankton density averaged 1.27×106-6.55×106 cell/L and was the highest in summer (1.21×107 cell/L) and the lowest in winter (1.68×105 cell/L). Annual average chlorophyll-a concentration varied between 2.86μg/L and 28.35 μg/L, with a maximum value of 33.6μg/L and minimum value of 1.36 μg/L. Phytoplankton density and chlorophyll-a concentration in the wet (flood) season were higher than in the dry season, higher in the lower reaches than the upper reaches, higher in the lowlands than the highlands and all are closely related to reservoir nutrient levels. In most of the reservoirs Cyanophyta species dominated during flood season and Bacillariophyta dominated during the dry season. Differences in chlorophyll-a concentration among the 17 reservoirs were significant, but differences in phytoplankton density were not significant. Analysis of trophic state index (TLI) and phytoplankton density indicate that the 17 reservoirs in the Hangzhou area are mesotrophic to slightly eutrophic. Canonical correspondence analysis (CCA) shows that nutrients and transparency were the primary environmental factors affecting phytoplankton community structure. There was also a significant correlation of phytoplankton density and chlorophyll-a concentration with total phosphorous concentration（r=0.527，P＜0.05；r=0.586，P＜0.05). |
| 盛海燕,姚佳玫,刘明亮,何剑波,韩轶才,虞左明,张银龙.2015.杭州地区17座水库浮游植物群落组成及其与环境因子的关系[J].水生态学杂志,36(1):25-33. |
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