学术
太湖水色因子空间分布特征及其对水生植物光合作用的影响
乐成峰[1] 李云梅[1] 张运林[2] 孙德勇[1] 伍蓝[1]
[1]南京师范大学江苏省地理信息科学重点实验室,南京210046 [2]中国科学院南京地理与湖泊研究所,南京210008
摘 要:
利用太湖全湖64个采样点的数据，分析了各水色因子及真光层深度的空间分布和变化特征，并探讨了其对水生植物光合作用的影响．结果表明：叶绿素a浓度在全湖间的差异最大，其变化范围为1．67-159．94μg·L^-1，均方差为41．03μg·L^-1，在梅梁湾、竺山湖、夹浦港和小梅口附近湖区，叶绿素a浓度较高且空间变化明显，等值线在这些湖区密集分布；悬浮物浓度变化次之，其含量在6．47-143．47mg·L^-1之间变化，均方差为31．63mg·L^-1，其在大浦港和小梅口入湖口附近湖区的空间变化明显，等值线分布密集；有色可溶性有机物（CDOM）吸收系数在全湖变化较小，没有明显的空间变化特征；真光层深度受悬浮物和叶绿素的共同影响，其空间分布特征与悬浮物相反．[著者文摘]
文章出处:
《应用生态学报》-2007年18卷11期 -2491-2496页
分 类 号:
文献标识码:
A
文章编号:
1001-9332（2007）11-2491-06
Water color parameter spatial distribution character and influence on hygrophyte photosynthesis in Taihu Lake
LE Cheng-feng , LI Yun-mei , ZHANG Yun-lin, SUN De-yong , WU Lan（ Jiangsu Provincial Key Laboratory of Geographic Information Science, Nanjing Normal University, Nanjing 210046, China; 2 Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China）
Abstract:
Using 64 stations water quality data collected in Taihu Lake, the spatial distribution of water color parameters and euphotic depth was analyzed, and the potential effect on hygrophyte photosynthesis was discussed. The result showed that the most variation was found for Chl a concentration ,the value varies from 1.67 μg·L^-1 to 159.94 μg·L^-1 , with the standard deviation of 41.03 mg · L^-1. The high Chl a concentration was recorded in Meiliang Bay, Zhushan Lake, Jiapu port and Xiaomei port with obviously spatial variation and compressive isoclines. The spatial variation of total suspended matter （TSM） concentration was lower than that of Chl a with a standard deviation of 31.63 mg·L^-1 , and the concentration varies from 6. 47 mg·L^-1 to 143.47 mg·L^-1 The high value was found in the area near Dapu port and Xiaomei port, with obviously spatial variation and compressive isoclines. No markedly spatial variation was found for colored dissolved organic matter （CDOM） in the whole lake. Euphotic depth was influenced by TSM and Chl a concentrations, while the influence by TSM was greater than that by Chl a. Therefore, the characteristics of spatial distribution for euphotic depth are reverse with TSM.[著者文摘]
Key words:
Taihu Lake; suspended matter; chlorophyll; colored dissolved organic matter （CDOM） ; euphotic depth
基金资助:
国家自然科学基金项目（40571110,40601099）和江苏省自然科学基金资助项目（BK2006580）.致谢 感谢王海君、杨大伟、王鑫、黄昌春、陆皖宁等同志在野外采样和数据分析过程中的帮助和支持.
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