Effects of ultraviolet radiation B (UV-B) on photosynthesis of natural phytoplankton assemblages in a marine bay in southern China
Yuan, XC; Yin, KD; Zhou, WH; Cao, WX; Xu, XQ; Zhao, D; kyin@ust.hk
2007
发表期刊CHINESE SCIENCE BULLETIN
ISSN1001-6538
卷号52期号:4页码:545-552
摘要Solar ultraviolet radiation B (UVB) is known to have inhibitive effects on phytoplankton photosynthesis. UVB light decreases rapidly with increasing depth in the water column and exerts different degrees of UVB inhibitive effects on phytoplankton photosynthesis. In this study, the objectives were to quantify effects of UVB on phytoplankton photosynthesis and quantum yield, and to examine UVB effects on phytoplankton photosynthesis when light varies. The in-situ experiments were conducted in Da Ya Bay, which is a semi-enclosed area in the subtropical South China. The results showed a significant reduction of photosynthetic rates and quantum yield in the presence of UVB. Maximum photosynthetic rates (P-max) and maximum quantum yield (Phi(max)) were 11%-22% and 17%-49% less under solar radiation with UVB than without UVB. A simplified model was developed to describe the UVB biologically effective fluence rate (E*(inh)) as an exponential decay function of depth. Light-shift experiments, in which water samples from the surface and at depth of 4 m were divided into several subsamples, and each subsamples were then incubated at different depths with and without UVB in the water column, showed that phytoplankton from the deeper water (4 m) had more inhibitive rates by UVB than that from the surface when exposed to the same light condition.
部门归属Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Trop Marine Environm Dynam, Guangzhou 510301, Guangdong, Peoples R China; Hong Kong Univ Sci & Technol, Atmospher Marine & Coastal Environm Program, Kowloon, Hong Kong, Peoples R China
关键词Uvb Inhibition Photosynthesis Carbon Uptake Quantum Yield South China Sea
学科领域Multidisciplinary Sciences
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收录类别sci
资助项目LED
WOS记录号WOS:000245837700018
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/5901
专题热带海洋环境国家重点实验室(LTO)
通讯作者kyin@ust.hk
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Yuan, XC,Yin, KD,Zhou, WH,et al. Effects of ultraviolet radiation B (UV-B) on photosynthesis of natural phytoplankton assemblages in a marine bay in southern China[J]. CHINESE SCIENCE BULLETIN,2007,52(4):545-552.
APA Yuan, XC.,Yin, KD.,Zhou, WH.,Cao, WX.,Xu, XQ.,...&kyin@ust.hk.(2007).Effects of ultraviolet radiation B (UV-B) on photosynthesis of natural phytoplankton assemblages in a marine bay in southern China.CHINESE SCIENCE BULLETIN,52(4),545-552.
MLA Yuan, XC,et al."Effects of ultraviolet radiation B (UV-B) on photosynthesis of natural phytoplankton assemblages in a marine bay in southern China".CHINESE SCIENCE BULLETIN 52.4(2007):545-552.
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