Geochemical characteristics and ecological functions of nitrogen in the abyssal basin surface sediments, South China Sea

ZHENG Guo-xia; SONG Jin-ming; SUN Yun-ming; DAI Ji-cui

Article Contents

Article Navigation > Haiyang Xuebao > 2006 > 28(6): 44-52

ZHENG Guo-xia, SONG Jin-ming, SUN Yun-ming, DAI Ji-cui. Geochemical characteristics and ecological functions of nitrogen in the abyssal basin surface sediments, South China Sea[J]. Haiyang Xuebao, 2006, 28(6): 44-52.

Citation:

PDF( 934 KB)

Geochemical characteristics and ecological functions of nitrogen in the abyssal basin surface sediments, South China Sea

1.
Institute of Oceanology,Chinese Academy of Sciences, Qingdao 266071, China;The Graduate School, Chinese Academy of Sciences, Beijing 100039, China
2.
Institute of Oceanology,Chinese Academy of Sciences, Qingdao 266071, China

Received Date: 2005-09-12
Rev Recd Date: 2006-06-08

Abstract

Abstract

The abyssal basin of the South China Sea(southwestern Nansha Trough),one of the most productive areas of the southern South China Sea,is a typical semi-deep sea area and forms the transition from the shoal water zone to the abyssal zone.In order to underst and the roles and distributions of nitrogen in the biogeochemical cycling in this area,the quantities of various nitrogen forms and total nitrogen content(TN) in surface sediments were experimentally quantified during a cruise in April-May 1999.The quantities of various nitrogen forms in surface sediments of the study area were different:nitrogen in ion exchangeable form(IEF-N) 11.4~35.8μg/g,nitrogen in weak acid extractable form(WAEF-N) 4.4~23.1μg/g,nitrogen in strongal kali extractable form(SAEF-N) 10.4~29.3μg/g and nitr ogen in strong oxidation extractable form(SOEF-N) 15.4~218.3μg/g.The distribution characteristics of the various nitrogen forms(except SAEF-N) and T N were to some extent similar with the relatively low nitrogen contents observed on the Kalimant an continental slope(KCS) in the east and Nansha oceanic plateau(NOP) in the west of the study area,thus for ming high values in the trough area.It was controlled by organic carbon contents(OC) and carbonate contents(CaCO₃) in sediments as well as by the sediment grainsize.Four forms of extract able nitrogen in surface sediments could be released and participated in biogeochemical recycling.When all the four forms of extractable nitrogen were released to take part in recycling,IEF-N and SOEF-N were the predominant contributors to phytoplankt on and primary productivity in water column.
- forms of nitrogen,
- geochemical characteristics,
- surface sediments,
- abyssal basin of the South China Sea

FullText(HTML)

References(25)

References

罗又郎,苏广庆,陈绍谋,等.南沙群岛及其邻近海区沉积图集[M].武汉:湖北科学技术出版社,1993.55-69.

马红波,宋金明,吕晓霞,等.渤海沉积物中氮的形态及其在循环中的作用[J].地球化学,2003,32(1):48-54.

DENIS L,GRENZ C,ALLIOT E,et al.Temporal variability in dissolved inorganic nitrogen fluxes at the sediment-water interface and annual budget on a continental shelf(NW Mediterranean)[J].Oceanology Acta,2001,24(1):85-97.

沈志良,陆家平,刘兴俊.黄河口附近海区沉积物间隙水中的营养盐[J].海洋学报,1991,13(3):407-411.

WILLIAN J U,ARMAND B.Dissolved nutrient fluxes from the nearshore sediments of Bowling Green Bay,Central Great Barrier Reef Lagoon(Australia)[J].EstuarineCostal and Shelf Science,1987,24:89-303.

L(U) Xiao-xia,SONG Jin-ming,LI Xue-gang,et al.Geochemical characteristics of nitrogen in the southern Yellow Sea surface sediments[J].Journal of Marine System,2005,56:17-27.

宋金明.中国近海生物地球化学[M].济南:山东科技出版社,2004.227-529.

古森昌,陈忠,颜文,等.南沙海槽区表层沉积物的地球化学特征[J].海洋地质与第四季地质,2001,21(2):43-47.

BLACKBURN T H,HENRIKSEN K.Nitrogen cycling in different types of sediments from Danish Waters[J].Limnology and Oceanography,1983,28(3):477-493.

陈忠,古森昌,颜文,等.南沙海槽南部海区表层沉积物的碳酸盐沉积特征[J].海洋学报,2002,24(5):141-146.

KUL T C W,WALTER L M,COLEMAN M L,et al.Coupling between sulfur recycling and syndepositional carbonate dissolution:evidence from oxygen and sulfur isotope composition of pore water sulfate,South Florida Platform,U.S.A.[J].Geochimica et Cosmochimica Acta,1999,63(17):2 529-2 546.

MORTIMER C H.Chemical exchanges between sediments and water in the Great Lakes-speculations on probable regulatory mechanisms[J].Limnology and Oceanography,1971,16:387-404.

BREZONIK P L.Nitrogen:Sources and transformationsin naturalwaters[A].Nutrients in naturalwaters[C].New York:Wiley,1972.1-50.

古森昌,颜文,陈忠,等.南沙海槽南部表层重砂矿物及其成矿远景[J].海洋地质与第四季地质,2003,23(1):13-18.

BALZCR W.Organic matter degradation and biogenic element cycling in a nearshore sediment(Kicl Bight)[J].Limnology and Oceanography,1984,29(6):1 231-1 246.

尹延鸿,孙嘉诗,曲高生.东太平洋地区573孔始新世末-渐新世初地层矿物学[J].海洋地质与第四季地质,2000,20(1):13-22.

鲍根德.太平洋西部深海沉积物中有机质、氮、磷的初步研究[J].沉积学报,1987,5(1):114-124.

MILLIMAN J D,HU Dun-xing.Tidal phase control of sediment discharge from the Yangtze River?[J].Estuarine,Coastal and Shelf Science,19(1):119-128.

钱君龙,王苏民,薛滨,等.湖泊研究中一种定量估算陆源有机碳的方法[J].科学通报,1997,42:1 655-1 657.

贾国东,彭平安,傅家谟.珠江口近百年来富营养化加剧的沉积记录[J].第四纪研究,2002,22(2):158-165.

吴时国,涂霞,罗又郎,等.南沙群岛海区有机碳沉积作用与古生产力估算[J].热带海洋学报,1995,4(14):58-66.

黄良民,尹建强,陈清潮.南沙群岛海区初级生产力和浮游动物研究10年[A].南沙群岛海区生态过程研究(一)[C].北京:海洋出版社,1997.133-149.

唐质灿.南沙群岛海区陆架单列羽螅组合及生态地理学研究[A].南沙群岛及其临近海区海洋生物研究论文集(二)[C].北京:海洋出版社,1991.255-261.

CHEN Lee Yuh-ling,SHIAH F K.Distribution and downward flux of Trichodesmium in the South China Sea as influnce by transportfrom the Kuroshio Current[J].Marine Ecology Progress Series,2003,259:47-57.

CHEN Lee Yuh-ling.Spatial and seasonal variations of nitrate-based new production and primary production in the South China Sea[J].Deep Sea Research Part Ⅰ:Oceanographic Research Papers,2005,5(2):319-340.

Relative Articles

Supplements(0)

Cited By

Proportional views