贵州三水库冬季浮游生物分布及影响因子分析

摘要

为揭示喀斯特地区深水水库冬季的浮游生物群落结构及其影响因子,于2010年2月对贵州红枫湖、百花湖和阿哈水库进行采样分析.共鉴定出红枫湖、百花湖和阿哈水库的浮游植物分别为66、70、60种,浮游植物丰度范围分别为0.34×106 ～2.25×106、3.03×106～ 12.72×106、5.3×106 ～ 13.3 × 106 cells/L,后生浮游动物分别为22、16、24种,丰度变化范围分别为1.1 ～36.5、7.3 ～ 408、27 ～135 ind/L.Jaccard相似系数显示红枫湖/百花湖(0.381)＞百花湖/阿哈水库(0.371)＞红枫湖/阿哈水库(0.274).典范对应分析(CCA)显示3个水库冬季的浮游植物的分布主要受透明度、温度、喜冷中镖水蚤、右突新镖水蚤、pH、舞跃无柄轮虫的影响,后生浮游动物的分布主要受透明度、温度、DO、沼泽颤藻、单角盘星藻具孔变种、TN和颗粒直连藻极狭变种螺旋变形的影响.%We sampling from Hongfeng lake, Baihua lake and Aha reservoir of Guizhou province in February 2010 and analysis in order to reveal the structure of plankton communities and regulating factors of deep reservoir in karst area. 66, 70 and 60 phytoplankton species were recorded and its abundances range was 34 × 10 -225 × 10 cells/L, 303 × 10 -1 272 × 10 cells/L and 530 × 104-1 330 × 104 cells/L in Hongfeng lake, Baihua lake and Aha reservoir respectively; 22, 16 and 24 meta-zooplankton species was recorded and its abundance range was 1. 1-36. 5 ind/L, 7. 3-408 ind/L and 27-135 ind/L in Hongfeng lake, Baihua lake and Aha reservoir respectively. Jaccard similarity coefficient shows that Hongfeng/Baihua (0.381) > Baihua /Aha (0.371) > Hongfeng/Aha (0.274). Canonical Correspondence Analysis (CCA) shows that the distribution of phytoplankton was mainly regulating by transparency, temperature, Sinodiaptomus chaffanjoni, Neodiaplomus schmackeri, pH value and Ascomorpha saltans; and the distribution of meta-zooplankton; was mainly regulating by transparency, temperature, DO and Oscillatoria limnetica, Pediastrum simplex var. duodenrium, TN and Melosira granulata var. angustissima f. spiralis in the three reservoir in winter.