夏季南海浮游植物光合固碳对不同波长阳光紫外辐射的响应

吴亚平; 高坤山

夏季南海浮游植物光合固碳对不同波长阳光紫外辐射的响应

厦门大学近海海洋环境科学国家重点实验室,福建厦门 361005

基金项目: 国家973计划项目(2009CB421207)。

计量
- 文章访问数: 1209
- HTML全文浏览量: 11
- PDF下载量: 1669
- 被引次数: 0
出版历程
- 收稿日期: 2010-06-13

Photosynthetic response of surface water phytoplankton assemblages to different wavebands of UV radiation in the South China Sea

State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China; 361005

摘要

摘要: 阳光紫外(UV)辐射影响浮游植物光合固碳,且不同波长UV辐射的生理效应不一。本文以夏季南海近岸海域浮游植物为研究对象,采用生物加权函数(Biological weighting function,BWF,亦被称为UV辐射作用光谱)的研究方法,探讨了不同波长UV辐射对浮游植物群落光合固碳的作用。结果表明,在只有可见光情况下的光合固碳速率最高,实验期间平均为10.86 μg/(μg·h),当暴露于含UV辐射的阳光下,光合固碳速率明显下降,且接受的辐射波长越短,固碳量越低;在全波段阳光辐射下培养的最低,每小时平均为6.51 μg,此时UVR的相对抑制率约为40%。同时BWF显示不同波长的紫外辐射抑制能力不一,波长越短抑制能力越强,UV-B最短波长(280 nm)的单位光能抑制率为UV-A(＞320 nm)的100万倍以上。
- BWF /
- 光合固碳 /
- 浮游植物 /
- 紫外辐射 /
- 作用光谱
Abstract: The photosynthetic carbon fixation of phytoplankton was affected significantly by solar UV radiation, while these effects are wavelength dependent.We investigated the photosynthetic carbon fixation by surface water phytoplankton assemblages of the South China Sea in summer under different radiation treatments to evaluate the photosynthetic response to different wavelength of UVR.The photosynthetic carbon fixation rate was the highest under PAR treatment, with the mean value of 10.86 μg/(μg·h).When the samples were exposed to PAR+UV radiation, the photosynthetic carbon fixation rate decreased significantly, the shorter wavelength exposed, the lower photosynthetic carbon fixation rate observed.As a result, the photosynthetic carbon fixation rate under full spectrum of solar radiation was the lowest, with the mean value of 6.51 μg/(μg·h), the relative inhibition induced by UVR was about 40%.Moreover, the effects of UV radiation were wavelength dependent, biological weighting function (BWF) indicated that the shorter wavelength of UVR, the higher inhibition per energy induced.The biological weight of the shortest wavelength of UV-B (i.e.280 nm) was at least 10⁶ times of the UV-A (＞320 nm).
- biological weighting function /
- phytoplankton /
- photosynthetic carbon fixation /
- UV radiation /

HTML全文

参考文献(22)

HDER D P, KUMAR H D, SMITH R C, et al.Effects of solar UV radiation on aquatic ecosystems and interactions with climate change[J]. Photoch Photobio Sci, 2007, 6: 267-285.

BOUCHARD J N, ROY S, FERREYRA G, et al.Ultraviolet-B effects on photosystem Ⅱ efficiency of natural phytoplankton communities from Antarctica[J]. Polar Biol, 2005, 28: 607-618.

WORREST R C, VAN DYKE H, THOMSON B E.Impact of enhanced simulated solar ultraviolet radiation upon a marine community[J]. Photochem Photobiol, 1978, 27: 471-478.

唐学玺, 杨震, 王悠, 等.紫外辐射诱发三角褐指藻自由基伤害的研究[J]. 海洋通报, 1999, 18: 93-96.

GAO K, LI P, WATANABE T, et al.Combined effects of ultraviolet radiation and temperature on morphology, photosynthesis and DNA of Arthrospira (Spirulina) platensis (Cyanophyta)[J]. J Phycol, 2008, 44: 777-786.

刘晓娟, 段舜山, 李爱芬.绿色巴夫藻受紫外(UV-B)胁迫后的超补偿生长效应[J]. 应用生态学报, 2007, 18: 169-173.

MOSELEY H, MACKIE R M.Ultraviolet B radiation was increased at ground level in Scotland during a period of ozone depletion[J]. Brit J Dermatol, 1997, 137: 101-102.

WU Y, GAO K, LI G, et al.Seasonal impacts of solar UV radiation on photosynthesis of phytoplankton assemblages in the coastal waters of the South China Sea[J]. Photochem Photobiol, 2010, 86: 586-592.

MARCOVAL M A, VILLAFANE V E, HELBLING E W.Combined effects of solar ultraviolet radiation and nutrients addition on growth, biomass and taxonomic composition of coastal marine phytoplankton communities of Patagonia[J]. J Photoch Photobio B, 2008, 91: 157-166.

GAO K, LI G, HELBLING E W, et al.Variability of UVR effects on photosynthesis of summer phytoplankton assemblages from a tropical coastal area of the South China Sea[J]. Photochem Photobiol, 2007, 83: 802-809.

GAO K, WU Y, LI G, et al.Solar UV-radiation drives CO2-fixation in marine phytoplankton: A double-edged sword[J]. Plant Physiol, 2007, 144: 54-59.

CULLEN J J, NEALE P J, LESSER M P.Biological weighting function for the inhibition of phytoplankton photosynthesis by ultraviolet radiation[J]. Science, 1992, 258: 646-650.

HELBLING E W, GAO K, GONCALVES R J, et al.Utilization of solar UV radiation by coastal phytoplankton assemblages off SE China when exposed to fast mixing[J]. Mar Ecol-Prog Ser, 2003, 259: 59-66.

PORRA R J.The chequered history of the development and use of simultaneous equations for the accurate determination of chlorophylls a and b[J]. Photosynth Res, 2002, 73: 149-156.

STEEMANN N E.The use of radio-active carbon (C14) for measuring organic production in the sea[J]. J Cons Perm Int Explor Mer, 1952, 18: 117-140.

RUGGABER A, DLUGI R, NAKAJIMA T.Modelling of radiation quantities and photolysis frequencies in the troposphere[J]. J Atmos Chem, 1994, 18: 171-210.

DYOMINOV I G, ZADOROZHNY A M.Greenhouse gases and recovery of the Earth's ozone layer[J]. Adv Space Res, 2005, 35: 1369-1374.

HELBLING E W, VILLAFAÑE V E, UV radiation effects on phytoplankton primary production: a comparison between Arctic and Antarctic marine ecosystems[M]// HESSEN D O(ed.)UV-radiation and arctic ecosystems. Ecological studies, No. 153. Berlin: Springer-Verlag, 2002, 203-226.

李刚.中国南海浮游植物光合固碳与阳光紫外辐射关系的研究 .汕头:汕头大学,2009.

WANGBERG S A, ANDREASSON K I M, GARDE K, et al.Inhibition of primary production by UV-B radiation in an Arctic bay-model calculations[J].Aquat Sci, 2006, 68: 117-128.

SOBRINO C, WARD M L, NEALE P J.Acclimation to elevated carbon dioxide and ultraviolet radiation in the diatom Thalassiosira pseudonana: Effects on growth, photosynthesis, and spectral sensitivity of photoinhibition[J]. Limnol Oceanogr, 2008, 53: 494-505.

FLEISCHMANN F M.The measurement and penetration of ultraviolet radiation into tropical marine water[J]. Limnol Oceanogr, 1989, 34: 1623-1629.

施引文献

资源附件(0)

访问统计

点击查看大图

计量

文章访问数: 1209
HTML全文浏览量: 11
PDF下载量: 1669
被引次数: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

留言板