| 小关水库夏季浮游植物功能群对富营养化特征的响应 |
| 摘要点击 3050 全文点击 1356 投稿时间：2015-04-08 修订日期：2015-07-17 |
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| 中文关键词 浮游植物功能群 RDA分析 富营养化 响应 小关水库 |
| 英文关键词 phytoplankton functional groups redundancy analysis(RDA) eutrophication response Xiaoguan Reservoir |
| 作者 | 单位 | E-mail | | 李磊 | 贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室, 贵阳 550001
贵州师范大学地理与环境科学学院, 贵阳 550001 | penglilei89@163.com | | 李秋华 | 贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室, 贵阳 550001 | qiuhua2002@126.com | | 焦树林 | 贵州师范大学地理与环境科学学院, 贵阳 550001 | | | 李钥 | 贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室, 贵阳 550001 | | | 肖晶 | 贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室, 贵阳 550001 | | | 邓龙 | 贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室, 贵阳 550001 | | | 孙荣国 | 贵州师范大学化学与材料学院, 贵阳 550001 | | | 高永春 | 贵州省水文水资源局, 贵阳 550002 | | | 骆兰 | 贵州省水文水资源局, 贵阳 550002 | |
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| 中文摘要 |
| 为了解贵州高原小型水库的浮游植物功能群分布、富营养化状况以及浮游植物功能群如何响应富营养化特征,于2014年7月25日至9月27日对小关水库浮游植物与水样进行每周一次的采样分析. 结果表明,浮游植物可分为22个功能群,S1、D、J、B、G、MP、LO、SN、X1、Y、Xph、F、T、W1为水库常见功能群,其中S1、D、J为优势功能群. 优势功能类群周动态变化为:S1→S1→S1→S1→S1→S1→S1→J/D/S1→S1→S1/D. 功能群S1表现出绝对的优势地位,其丰度于第5周与第7周出现两次峰值,然而在第8周采样中丰度急速下降,其后又有所回升,但与两次峰值相比已经由108 cells ·L-1下降至107 cells ·L-1,人工放闸导致的短期剧烈冲刷作用是主要原因. 通过浮游植物功能群、藻类生物学评价以及综合营养指数三者综合评价发现,小关水库正处于中度富营养-富营养化状态. 经RDA分析得出,透明度为影响浮游植物功能群分布的主要因子之一,营养盐不再成为限制因子. 研究结果表明,功能群能够对富营养化特征做出良好响应:优势功能群S1、J常共生于浑浊的富营养化水体中,功能群D适应生境为浅的浑浊水体,对营养耗尽敏感,G、X1、W1、F等常见功能群也大都适于富营养化水体中生长. |
| 英文摘要 |
| In order to explore the distribution characteristics of phytoplankton functional groups, eutrophication characteristics and response of phytoplankton functional groups to eutrophication in Xiaoguan Reservoir, phytoplankton and water samples were taken once a week from 25th July 2014 to 27th September 2014. The results showed that there were 22 phytoplankton functional groups, groups S1, D, J, B, G, MP, LO, SN, X1, Y, Xph, F, T and W1 were comparatively common functional groups, Wherein, S1, D and J were the dominant functional groups. Weekly dynamics of phytoplankton functional groups were: S1→S1→S1→S1→S1→S1→S1→J/D/S1→S1→S1/D. group S1 dominated over other groups, the cell abundance of S1 appeared two peaks at week 5 and week 7 respectively, but there was a slump at week 8, and rose again at last, compared to two peaks before, the cell abundance had dropped from 108 cells ·L-1 to 107 cells ·L-1. Water flush caused by discharge gate opening artificially was the main reason. Based on the three methods of eutrophication evaluation, the water was in moderately eutrophic and eutrophic states in Xiaoguan Reservoir in the summer of 2014. Multivariate analysis (RDA) indicated transparency was the main factor affecting the distribution of phytoplankton functional groups, and nutrients were no longer the limiting factor. The study suggested that phytoplankton functional groups could make a good response to eutrophication: groups S1 and J adapted to the turbid eutrophic water bodies, D adapted to shallow turbid waters and was sensitive to nutrient depletion. Also, common functional groups like G, X1, W1, F etc. mostly adapted to eutrophic water bodies. |
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