贵州红枫湖越冬藻类的空间分布与实验室复苏实验  

Spatial distribution and recruitment simulation test of over-winter algae in Lake Hongfeng,Guizhou

作　　者：王敬富[1,2] 陈敬安[1] 李秋华[3] 夏品华[3] 曾艳[1,2] 杨永琼[1,2] 杨海全[1,2] 

机构地区：[1]中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳550002 [2]中国科学院大学,北京100049 [3]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

出　　处：《湖泊科学》2013年第1期108-114,共7页Journal of Lake Sciences

基　　金：国家科技支撑计划项目(2011BAC02B0201);贵阳市重大科技专项计划项目联合资助

摘　　要：本文选取贵州省红枫湖这一典型的亚深水型湖泊作为研究对象,在8个代表性湖区开展了为期一年的表层水体藻类浮游植物分布的月定量监测,并在4个采样点采集新鲜沉积物进行了越冬藻类赋存与复苏模拟实验研究.研究表明,红枫湖表层水体藻类种群密度蓝藻绿藻>硅藻>甲藻,蓝藻为优势门类,水体藻类种群密度秋季初期最高,其次是春季初期和夏季,具有明显的季节性演化特征.水体中越冬藻类以蓝藻为主,其次是硅藻和绿藻,水深对水体中藻类的种群密度及组成没有显著影响.沉积物中越冬藻类以硅藻为主,基本不含蓝藻.模拟实验表明,水体中的光照条件对藻类的复苏和生长有重要影响,温度和沉积物中藻类的种群密度与组成同样影响藻类的复苏.In order to investigate the spatial variations of the over-winter algae in dilt＇erent areas of Lake Hongfeng, sediment and water samples were collected monthly at 8 sites over a period of 1 year. Simulation test of dormancy algae recruitment from sedi- ments collected form 4 sites were carried out. The results showed that cyanobacteria were the dominant species in surface water, and the population density of the cyanobacteria was significantly higher than the green algae, diatoms and dinoflagellates. Algal population density evolved seasonally, which was the highest in early autumn and followed by the early spring and summer. Cya- nobacteria dominated in over-winter algae in water, followed by diatoms and green algae. The water depth did not affect significantly the population density and composition of the algae in water. Diftering from in water, over-winter algae in sediments were mostly diatoms, and only small amount of cyanobacteria were found. Simulation experiments showed that light intensity had a major impact on the algae recruitment, which was also affected by water temperature and sediment algae population density.

关 键 词：红枫湖 藻类 越冬 复苏 光照 空间分布 

分 类 号：X173[环境科学与工程—环境科学]