SPATIAL DISTRIBUTION OF PICO- AND NANO- PHYTOPLANKTON AND BACTERIA IN THE CHUKCHI SEA IN RALATION TO WATER MASSES

doi:10.3724/SP.J.1084.2012.00238

Abstract

Abstract: Based on the Third Chinese Arctic Expedition cruise in the summer of 2008, the distribution patterns of pico-, nano-plankton and bacteria abundance in the Chukchi Sea were studied. Pico- and nano-phytoplankton abundances ranged from 0.01×103 to 5.51×103 cells/mL and from 0.01×103 to 5.51×103 cells/mL, respectively. The lowest numbers of bacteria in the entire water column was recorded at station R17 at 100 m depth (0.21×106 cells/mL), and the highest concentration was observed at station R09 at 10 m depth (9.61×106 cells/mL). Our results demonstrated that melting sea ice is affecting affects the physical characteristics of the Chukchi Sea by causing reductions in the salinity of the surface mixed layer, which in turn results in greater hydrodynamic stability of the water column. These changes were accompanied by increasing bacterial concentrations. The Pacific warm water brought high nutrients into the Chukchi Sea, which led to higher abundance of bacteria and nano-phytoplankton in the Chukchi Sea comparing to other regions of the Arctic Ocean. However, the number of picophytoplankton in the Anadyr Water with notably relation to chlorophyll a was larger than the other two water masses. The structure of pico- and nanoplankton communities coupled with the water masses in the Chukchi Sea was can be considered to act as asindicators of the variability the inflow of Pacific warm water into the Chukchi Sea.

Key words: Arctic Ocean, Chukchi Sea, bacteria, pico-phytoplankton, nano-phytoplankton

Zhang Fang，He Jianfeng，Guo Chaoying，Lin Ling，Ma Yuxin. SPATIAL DISTRIBUTION OF PICO- AND NANO- PHYTOPLANKTON AND BACTERIA IN THE CHUKCHI SEA IN RALATION TO WATER MASSES[J]. ADVANCES IN POLAR SCIENCE, 2012, 24(3): 238-246.

References

[1]高郭平, 侍茂崇, 赵进平, 等.1999 年白令海夏季水文特征分析[J].海洋学报,2002,24:8-16

[2]Aagaard K, Coachman L K, Carmack E C.On the halocline of the Arctic Ocean[J].Deep-Sea Res,1981,28:529-545

[3]Herman Y. Physical oceanography of Arctic and Subarctic Seas. New York.[J].Springer-Verlag,1974,:-

[4]Tang Y, Jiao Y, Zou E.A prelmnary analysis of the hydrographic features and water masses in the Bering Sea and the Chukchi Sea[J].Adv Polar Sci,2001,13:57-68

[5]赵进平, 史久新, 金明明, 等.楚科奇海融冰过程中的海水结构研究[J].地球科学进展,2010,25:154-162

[6]Garneau M E, Vincent W F, Alonso-Sáez L, et al.Prokaryotic community structure and heterotrophic production in a river-influenced coastal arctic ecosystem[J].Aqua Microb Ecol,2006,42:27-40

[7]Schloss I R, Nozais C, Mas S, et al.Picophytoplankton and nanophytoplankton abundance and distribution in the southeastern Beaufort Sea (Mackenzie Shelf and Amundsen Gulf) during Fall 2002[J].J Mar Syst,2008,74:978-993

[8]Sambrotto R N, Goering J J, McRoy C P.Large 1984ly production of phytoplankton in the Bering Strait[J].Science,1984,255:1147-1150

[9]Liu Z, Chen J, Zhang T, et al.Size-fractionated chlorophyll a and primary productivity in the Chukchi Sea and its northern Chukchi Plateau[J].Acta Ecologica Sinica,2007,27:4953-4962

[10]Steward G F, Smith D C, Azam F.Abundance and production of bacteria and viruses in the Bering and Chukchi Seas[J].Mar Ecol Prog Ser,1996,131:287-300

[11]Wheeler P A, Gosselin M, Sherr E, et al.Active cycling of organic carbon in the central Arctic Ocean[J].Nature,1996,380:697-699

[12]Gosselin M, Levasseur M, Wheeler P A, et al.New measurements of phytoplankton and ice algal production in the Arctic Ocean[J].Deap-Sea Res II,1997,44:1623-1644

[13]Sherr E B, Sherr B F, Wheeler P A, et al.Temporal and spatial variation in stocks of autotrophic and heterotrophic microbes in the upper water column of the central Arctic Ocean[J].Deep-Sea Res,2003,50:557-571

[14]Cota G F, Pomeroy L R, Harrison W G.Nutrients, primary production and microbial heterotrophy in the southeastern Chukchi Sea: arctic summer nutrient depletion and heterotrophy[J].Mar Ecol Prog Ser,1996,135:247-258

[15]Hill V, Cota G, Stockwell D.Spring and summer phytoplankton communities in the Chukchi and Eastern Beaufort Seas[J].Deep-Sea Res II,2005,52:3369-3385

[16]Kirchman D L, Hill V, Cottrell M T, et al.Standing stocks, production, and respiration of phytoplankton and heterotrophic bacteria in the western Arctic Ocean[J].Deep-Sea Res II,2009,56:1237-1248

[17]高生泉, 陈建芳, 李宏亮, 等.2008年夏季白令海营养盐的分布及其结构状况[J].海洋学报,2011,33(2):157-

[18]Parsons T R.[J].Maits Y, Lalli C M. A manual of chemical and biological methods for seawater analysis. Pergamon Press,1984,:-

[19]Sherr E B, Sherr B F, Fessenden L.Heterotrophic protists in the Central Arctic Ocean[J].Deep-Sea Res II,1997,44:1665-1682

[20]Menden-Deuer S, Lessard E J.Carbon to 45 relationships for dinoflagellates, diatoms, and other protist plankton[J].Limnol Oceanogr,2000,45:569-579

[21]Wang G, Guo C, Luo W, et al.The distribution of picoplankton and nanoplankton in Kongsfjorden, Svalbard during late summer 2006[J].Polar Biol,2009,32:1233-1238

[22]Mostajir B, Gosselin M, Gratton Y, et al.Surface water distribution of pico- and nanophytoplankton in relation to two distinctive water masses in the North Water, northern Baffin Bay, during fall[J].Aquat Microb Ecol,2001,23:205-212

[23]Booth B C, Smith W O.Autotrophic flagellates and diatoms in the Northeast Water polynya, Greenland: summer 1993[J].J Mar Syst,1997,10:241-261

[24]Not F, Ramon M, Mikel L, et al.Late summer community composition and abundance of photosynthetic picoeukaryotes in Norwegian and Barents Seas[J].Limnol Oceanogr,2005,50:1677-1686

[25]Li W K W, McLaughlin F A, Lovejoy C, et al.Smallest algae thrive as the Arctic Ocean freshens[J].Science,2009,326:539-

[26]Carmack E C, MacDonald R W.Oceanography of the Canadian shelf of the Beaufort Sea: a setting for marine life[J].Arctic,2002,55:29-45

[27]Lovejoy C, Massana R, Pedro′s-Alio C.Diversity and distribution of marine microbial eukaryotes in the Arctic Ocean and adjacent seas[J].Appl Environ Microb,2006,72:3085-3095

[28]Cottrell M T, Kirchman D L.Photoheterotrophic microbes in the Arctic Ocean in summer and winter[J].Appl Environ Microbiol,2009,75:4958-4966

[29]Vincent W F.Microbial ecosystem responses to rapid climate change in the Arctic[J].ISME J,2010,4:1087-1090

[30]Rich J, Gosselin M, Sherr E, et al.High bacterial production, uptake and concentrations of dissolved organic matter in the Central Arctic Ocean[J].Deep-Sea Res II,1997,44:1645-1663

[31]Wells L E, Deming J W.Abundance of bacteria, the Cytophaga-Flavobacterium cluster and archaea in cold oligotrophic waters and nepheloid layers of the Northwest Passage, Canadian Archipelago[J].Aquat Microb Ecol,2003,31:19-31

[32]Meon B, Amon R M W.Heterotrophic bacterial activity and fluxes of dissolved free amino acids and glucose in the Arctic river Ob, Yenisei and the adjacent Kara Sea[J].Aqua Microb Ecol,2004,37:121-135

[33]林凌, 何剑锋, 张芳, 等.2008年夏季白令海和北冰洋异养浮游细菌丰度与分布特征[J].海洋学报,2011,33(2):166-

[34]Kirchman D L, Morán X A G, Ducklow H.Microbial growth in the polar oceans—role of temperature and potential impact of climate change[J].Nature Rev Microb,2009,7:451-459

[35]Parsons T R, Takahashi M.Environmental control of phytop lankton cell size[J].Limnol Oceanogr,1973,18:511-515

[36]Vincent W F, Whyte L G, Lovejoy C, et al.Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year[J].Polar Sci,2009,3:171-180

[37]Eilertsen H C, Degerlund M.Phytoplankton and light during the northern high-latitude winter[J].J Plankt Res,2010,32:899-912