巢湖夏季水华期间水体中溶解性碳水化合物的研究  

Distribution of carbohydrates species during summer bloom in Lake Chaohu

作　　者：叶琳琳[1,2] 史小丽[2] 张民[2] 吴晓东[3] 孔繁翔[2] 

机构地区：[1]南通大学地理科学学院,江苏南通226019 [2]中国科学院南京地理与湖泊研究所,湖泊与环境国家重点实验室,江苏南京210008 [3]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《中国环境科学》2012年第2期318-323,共6页China Environmental Science

基　　金：国家“973”项目(2008CB418005,2008CB418000);国家重大水专项(2008ZX07103);国家自然科学基金资助项目(41001032,40901268)

摘　　要：在2010年7月巢湖蓝藻水华暴发期间,采集了11个点位的表层水样,分析了叶绿素含量﹑溶解性有机碳﹑不同形态氮磷营养盐以及各种碳水化合物的浓度.研究结果表明,巢湖营养盐浓度呈现西高东低的分布趋势,叶绿素浓度与营养盐浓度分布规律不完全一致,说明影响藻类空间分布的因素很多.硝酸盐浓度是影响溶解性有机碳的重要因素.总溶解性碳水化合物占溶解性有机碳的比例最高为26%,多糖和单糖所占比例分别为21%和6%.叶绿素浓度与溶解性有机碳,各种碳水化合物之间不具有显著相关性,说明在巢湖蓝藻水华暴发期间,除了浮游植物,陆源输入可能也是溶解性有机碳及各种碳水化合物的重要来源.Surface water samples were collected from eleven sampling sites in Lake Chaohu in July 2010,Chlorophyll a,dissolved organic carbon,phosphorus,nitrogen,and various carbohydrates concentrations were analyzed.Nutrient levels were higher in the west than that in the east,but Chlorophyll a did not show the same pattern,implying that the distribution of phytoplankton was affected by other factors.Furthermore,the dissolved organic carbon concentration was related to nitrate concentration.On average,total dissolved carbohydrates was the predominant carbon species,accounting for 26% of the dissolved organic carbon,whereas dissolved polysaccharides and dissolved monosaccharides comprised 21% and 6%,respectively.No significant relationship was observed between Chlorphyll a,dissolved organic carbon and various carbohydrates,suggesting that the resource of dissolved organic carbon and carbohydrates was more than phytoplankton during cyanobacterial bloom in Lake Chaohu.

关 键 词：巢湖 溶解性有机碳 碳水化合物 硝酸盐 

分 类 号：X171[环境科学与工程—环境科学]