Journal of Ecology and Rural Environment ›› 2003, Vol. 19 ›› Issue (2): 24-28.doi:
• muci • Previous Articles Next Articles
YANG Ding-Tian, CHEN Wei-Min, ZHANG Yun-Lin, JI Jiang
Received:
Online:
Published:
Abstract: Distribution of light spectrum and primary production in the waterbody of Meiliang Inlet of Taihu Lake was studied. The results show that on the water surface, the intensity of UV-C was low (10 -5 μE·m -2 ·s -1 ), that of UV-B increased with wavelength and that of UV-A was much higher (10 -2 μE·m -2 ·s -1 ) but attenuated rapidly with maximum vertical diffuse attenuation coefficient ( K d )value up to 12.5 m -1 . K d of visible light could reach as high as 8.2 m -1 . In comparison with the value on the surface, the intensity of ultraviolet at 0.5 m was less than 1%, and of visible light around 20%. The primary production was relatively low in the surface, reached peak at the depth of 0.2 m and then decreased with the increase in depth. Direct measurement revealed that dissolved oxygen in the water was high at the depth of 0.2 m. Concentration of chlorophyll-a varied with light intensity in the water. These results show that the distribution of primary production was the result of the joint effect of ultraviolet and visible light.
Key words: waterbody, ultraviolet spectrum, visible light spectrum, primary production
CLC Number:
P343.3
YANG Ding-Tian, CHEN Wei-Min, ZHANG Yun-Lin, JI Jiang. Effect of underwater light spectrum on primary production of the Taihu Lake[J]. Journal of Ecology and Rural Environment, 2003, 19(2): 24-28.
0 / / Recommend
Add to citation manager EndNote|Reference Manager|ProCite|BibTeX|RefWorks
URL: http://www.ere.ac.cn/EN/
http://www.ere.ac.cn/EN/Y2003/V19/I2/24