藻类水华对太湖梅梁湾不同粒径有机组分结构的影响  

The impact of phytoplankton bloom on the composition of different size fractions of organic matter in Meiliang Bay,Lake Taihu

作　　者：叶琳琳[1,2] 史小丽[2] 于洋[2] 张民[2] 金苗[2] 刘一兰[2] 孔繁翔[2] 

机构地区：[1]南通大学地理科学学院,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,南京210008

出　　处：《环境科学学报》2012年第3期662-667,共6页Acta Scientiae Circumstantiae

基　　金：国家重点基础研究发展计划项目(No.2008CB418005,2008CB418000)~~

摘　　要：运用过滤和切向流超滤系统,分离得到2009年8月至2010年8月每月的太湖梅梁湾不同粒径水体有机物,测定了水体中颗粒态有机碳,高分子量和低分子量可溶解性有机碳的含量,并同步分析了叶绿素浓度,水体中各种有机物的碳氮比值和中性单糖含量.对不同形态有机碳浓度的比较发现颗粒态有机碳是太湖碳存在的主要形式.统计分析结果表明叶绿素浓度与颗粒态有机碳之间具有显著的相关性,说明浮游植物是颗粒态有机物的主要来源.此外高分子量可溶性有机物的碳氮比值和中性单糖含量均相对较高,这表明该有机碳的生物可利用性比其它形态的水体有机碳高.Different size fractions of organic matter were collected using filter and cross-flow ultrafiltratlon, from Meiliang Bay in Lake Taihu from August 2009 to August 2010. Particulate organic carbon, high and low molecular weight dissolved organic carbon concentrations, as well as Chlorophyll a concentration were analyzed. The isolated High Molecular Weight Dissolved Organic Matter （HMW-DOM） was further characterized by atomic carbon to nitrogen ratio and neutral sugars composition. The results indicated that particulate organic carbon was the predominant species of carbon in Lake Taihu. The statistical results showed a significant correlation between the concentrations of Chlorophyll a and particulate organic carbon, indicating that phytoplankton was the main source of organic carbon. Moreover, significant difference of earborl to nitrogen ratio was observed between particulate organic matter and HMW-DOM. The high value of carbon to nitrogen ratio and neutral sugars concentration suggested that HMW-DOM is highly bioreaetive.

关 键 词：梅梁湾 碳氮比值 中性单糖 切向流超滤系统 

分 类 号：X524[环境科学与工程—环境工程]