Size structure of biomass and primary production of phytoplankton: environmental impact analysis in the Dongsha natural gas hydrate zone, northern South China Sea
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摘要: 本文讨论了2013年5月南海东沙天然气水合物区浮游植物生物量和生产力粒级结构特征及其环境影响因素。结果表明,研究海域表现出典型的低营养盐、低叶绿素a、低生产力特征,浮游植物叶绿素a和初级生产力具有明显的次表层最大值现象。东沙海域生物量和初级生产力粒级结构差异性显著,从生物量和生产力贡献度来看,表现为微微型浮游植物> 微型浮游植物> 小型浮游植物。生物量的垂直分布结果表明,春季不同粒级类群浮游植物在真光层内的分布存在明显不同,比如小型浮游植物在真光层内分布较均匀;微型浮游植物则主要分布于近表层或真光层中部,而微微型浮游植物则主要分布于真光层中部和底部。微微型浮游植物在纬度较低的热带贫营养海区之所以能够占主导优势,最主要的原因是其极小的细胞体积和较大的表面积使其有利于营养竞争。相关性分析表明,南海东沙浮游植物各粒级生物量与温度、pH显著正相关,与硅酸盐、磷酸盐显著负相关;浮游植物各粒级生产力与温度显著正相关,与盐度、磷酸盐显著负相关。磷酸盐含量是影响东沙海域浮游植物粒级结构差异的重要因素之一,同时,光辐照度和水体的真光层深度对东沙天然气水合物区不同粒径浮游植物的垂直分布起着更为重要的调控作用。Abstract: The size-fractionated biomass and primary production of phytoplankton, and the influence of environmental factors on it were studied in the Dongsha natural gas hydrate zone of the northern South China Sea in May 2013. Low nutrient, low chlorophyll a (Chl a) and primary productivity characteristics were found in these waters. The phenomena of subsurface Chl a maximum layers (SCMLs) and primary production maximum layers (SPMLs) were observed in the Dongsha waters. There were significant differences in the size-fractionated biomass and primary production that showed picophytoplankton > nanophytoplankton > microphytoplankton in terms of biomass and degree of contribution to production. Vertical biomass distribution indicated there were considerable differences among different phytoplankton within the euphotic zone (Zeu) in spring. For example, microphytoplankton was distributed evenly in the euphotic layer and nanophytoplankton was mainly distributed in the subsurface or in the middle of the euphotic layer, while picophytoplankton was mainly distributed in the middle or bottom of the euphotic layer. Smaller cell size and larger relative surface area allow picophytoplankton to benefit from nutrient competition and to hold a dominant position in the tropical oligotrophic waters of low latitudes. There was a positive correlation between size-fractionated biomass and temperature with pH and a negative correlation between size-fractionated biomass and silicate with phosphate. There was a positive correlation between size-fractionated primary production and temperature and a negative correlation between size-fractionated biomass and salinity with phosphate. Phosphate was an important factor influencing the size structure of phytoplankton. Meanwhile, irradiation and the euphotic layer were more important in regulating the vertical distribution of size-fractionated phytoplankton in the Dongsha natural gas hydrate zone.
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Key words:
- phytoplankton /
- biomass /
- primary production /
- size fractionation /
- gas hydrate /
- northern South China Sea
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Cai Yuming, Ning Xiuren, Liu Chenggang. 2002. Distribution characteristics of size-fractionated chlorophyll a and productivity of phytoplankton in the northern South China Sea and Beibu Gulf during August 1999. Studia Marina Sinica (in Chinese),(44): 11-21 Campbell L, Landry M R, Constantinou J, et al. 1998. Response of microbial community structure to environmental forcing in the Arabian Sea. Deep Sea Research Part Ⅱ: Topical Studies in Oceanography, 45(10-11): 2301-2325 Campbell L, Vaulot D. 1993. Photosynthetic picoplankton community structure in the subtropical North Pacific Ocean near Hawaii (station ALOHA). Deep Sea Research Part I: Oceanographic Research Papers, 40(10): 2043-2060 Chen Huaiqing, Qian Shuben. 1992. The study of nanophytoplankton and picophytoplankton in the offshore of Qingdao. Hai- yang Xuebao (in Chinese), 14(3): 105-113 Cotner J B, Ammerman J W, Peele E R, et al. 1997. Phosphorus-limited bacterioplankton growth in the Sargasso Sea. Aquatic Microbial Ecology, 13(2): 141-149 Cullen J J. 2015. Subsurface chlorophyll maximum layers: enduring enigma or mystery solved?.. Annual Review of Marine Science, 7: 207-239 D'souza N A, Subramaniam A, Juhl A R, et al. 2016. Elevated surface chlorophyll associated with natural oil seeps in the Gulf of Mexico. Nature Geoscience, 9(3): 215-218 DuRand M D, Olson R J, Chisholm S W. 2001. Phytoplankton population dynamics at the Bermuda Atlantic Time-series station in the Sargasso Sea. Deep Sea Research Part Ⅱ: Topical Studies in Oceanography, 48(8-9): 1983-2003 Fan Jiewei. 1985. Primary production. In: Research Report on the Combined Survey of South China Sea (2) (in Chinese). Beijing: Science Press, 317-331 Fang Tao, Li Daoji, Yu Lihua, et al. 2006. Effects of irradiance and phosphate on growth of nanophytoplankton and picophytoplankton. Acta Ecologica Sinica, 26(9): 2783-2790 General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. 2008a. GB/T 12763.4-2007 Specifications for oceanographic survey-part 4: survey of chemical parameters in sea water (in Chinese). Beijing: China Standard Press, 1-65 General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. 2008b. GB/T 12763.6-2007 Specifications for oceanographic survey-part 6: marine biological survey (in Chinese). Beijing: China Standard Press, 1-158 Glover H E, Smith A E, Shapiro L. 1985. Diurnal variations in photosynthetic rates: comparisons of ultraphytoplankton with a larger phytoplankton size fraction. Journal of Plankton Research, 7(4): 519-535 Hao Qiang, Ning Xiuren, Liu Chenggang, et al. 2007. Satellite and in situ observations of primary production in the northern South China Sea. Haiyang Xuebao (in Chinese), 29(3): 58-68 Hong Huasheng, Ruan Wuqi, Huang Bangqin, et al. 1997. Studies on the primary productivity and its controlling mechanism in the Taiwan Strait. In: Hong Huasheng, ed. Oceanography in China (in Chinese). Beijing: China Ocean Press, 7: 1-15 Huang Bangqin, Hong Huasheng, Lin Xueju, et al. 2003. Ecological study on picophytoplankton in the Taiwan Strait: I. Spatial and temporal distribution and its controlling mechanism. Haiyang Xuebao (in Chinese), 25(4): 72-82 Huang Bangqin, Hong Huasheng, Wang Haili, et al. 1997. The primary production processes in the Taiwan Strait. In: Hong Huasheng, ed. Oceanography in China (in Chinese). Beijing: China Ocean Press, 7: 31-37 Huang Liangmin, Qian Honglin, Li Jinrong. 1994. Preliminary studies on the relationships between Chlorophyll a and environmental factors in Dapeng Bay. Oceanologia et Limnologia Sinica (in Chinese), 25(2): 197-205 Jiao Nianzhi. 2006. Marine Microbial Ecology (in Chinese). Beijing: Science Press, 41-310 Kang Jianhua. 2009. Studies on seasonal variation of chlorophyll a and primary production in the Taiwan Strait and its adjacent sea area (in Chinese) [dissertation]. Xiamen: Xiamen University, 1-138 Le Fengfeng, Ning Xiuren, Liu Chenggang, et al. 2008. Standing stock and production of phytoplankton in the northern South China Sea during winter of 2006. Acta Ecologica Sinica (in Chinese), 28(11): 5775-5784 McGillicuddy Jr D J, Anderson L A, Bates N R, et al. 2007. Eddy/wind interactions stimulate extraordinary mid-ocean plankton blooms. Science, 316(5827): 1021-1026 Moore L R, Goericke R, Chisholm S W. 1995. Comparative physiology of Synechococcus and Prochloroc?????: influence of light and temperature on growth, pigments, fluorescence and absorptive properties. Marine Ecology Progress Series, 116(1-3): 259-276 Ning Xiuren, Cai Yuming, Li Guowei, et al. 2003. Photosynthetic picoplankton in the northern South China Sea. Haiyang Xuebao (in Chinese), 25(3): 83-97 Ning Xiuren, Worrall D. 1991. Distribution, cell characteristics and environmental regulation of cyanobacteria in the Yangtze River estuary and its adjoining East China Sea. Haiyang Xuebao (in Chinese), 13(4): 552-559 Parsons T R, Maita Y, Lalli C M. 1984. A Manual of Chemical and Biological Methods for Seawater Analysis. New York: Pergamon Press, 158-161 Sauter E J, Muyakshin S I, Charlou J L, et al. 2006. Methane discharge from a deep-sea submarine mud volcano into the upper water column by gas hydrate-coated methane bubbles. Earth and Planetary Science Letters, 243(3-4): 354-365 Shen Guoying, Huang Lingfeng, Guo Feng, et al. 2010. Marine Ecology (in Chinese). 3rd ed. Beijing: Science Press, 119-136 Stockner J G, Antia N J. 1986. Algal picoplankton from marine and freshwater ecosystems: a multidisciplinary perspective. Canadian Journal of Fisheries and Aquatic Sciences, 43(12): 2472-2503 Thingstad T F, Rassoulzadegan F. 1995. Nutrient limitations, microbial food webs, and biological C-pumps: suggested interactions in a P-limited Mediterranean. Marine Ecology-Progress Series, 117(1-3): 299-306 Yentsch C S, Menzel D W. 1963. A method for the determination of phytoplankton chlorophyll and phaeophytin by fluorescence. Deep Sea Research and Oceanographic Abstracts, 10(3): 221-231 Zhang Yao, Jiao Nianzhi, Hong Ning. 2008. Comparative study of picoplankton biomass and community structure in different provinces from subarctic to subtropical oceans. Deep Sea Research Ⅱ: Topical Studies in Oceanography, 55(14-15): 1605-1614 Zhang Guangxue, Yang Shengxiong, Zhang Ming, et al. 2014. GMGS2 expedition investigates rich and complex gas hydrate environment in the South China Sea. Fire in the Ice, 14(1)
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