發(fā)布時(shí)間：2018-06-29 04:27

  本文選題：渤海 + 北黃海��； 參考：《中國(guó)海洋大學(xué)》2014年碩士論文

【摘要】：本文主要進(jìn)行了兩方面的研究工作。 第一，對(duì)取自基金委2012年渤海北黃海綜合考察公共航次期間，不同季節(jié)春季（5月）的50個(gè)和秋季（11月）46個(gè)渤海北黃海表層沉積物樣品中的底棲有孔蟲(chóng)進(jìn)行了定性定量分析，討論了不同季節(jié)活體底棲有孔蟲(chóng)群落的屬種組成，活體群、尸積群底棲有孔蟲(chóng)的分布特征，活體有孔蟲(chóng)在不同季節(jié)的分布的范圍，以及活體有孔蟲(chóng)與尸積群有孔蟲(chóng)在屬種和分布上的差異。結(jié)合RDA（冗余分析）對(duì)春秋兩季活體有孔蟲(chóng)及其生活環(huán)境參數(shù)如溫度、鹽度、水深、濁度、葉綠素、溶解氧等參數(shù)進(jìn)行了排序分析，進(jìn)一步探討了活體有孔蟲(chóng)與其生活環(huán)境參數(shù)之間的直接關(guān)系。得出 （1）活體有孔蟲(chóng)季節(jié)性變化很大，表現(xiàn)在豐度高值區(qū)的分布、組合方面春秋季上的差異，主要是受生活環(huán)境因素影響，活體有孔蟲(chóng)對(duì)其生活的環(huán)境異常敏感，對(duì)短時(shí)期的環(huán)境變化有明顯的指示作用。 （2）利用RDA對(duì)活體有孔蟲(chóng)與其生活環(huán)境參數(shù)的相關(guān)性對(duì)比后發(fā)現(xiàn)，在春季A.tasmanensis, N.stella和Bulimina sp.與深度、密度和鹽度呈正相關(guān)，與葉綠素含量呈負(fù)相關(guān)。B.frigida和V.advena和溶解氧呈正相關(guān)，與水溫呈負(fù)相關(guān)。C. subincertum與濁度和水溫呈正相關(guān)，與溶解氧含量呈負(fù)相關(guān)。V.advena與海水鹽度有明顯的正相關(guān)。P.tuberculatum和A.beccarii vars.與海水鹽度呈負(fù)相關(guān)。在秋季，活體P. tuberculatum組合范圍擴(kuò)大，C. subincertum和P. tuberculatum組合范圍縮小。在春季，生活在遼東半島南部沿岸的活體優(yōu)勢(shì)種有孔蟲(chóng)B. frigida組合，在秋季被V. advena組合所替代。底棲有孔蟲(chóng)屬種季節(jié)性的變化是對(duì)渤海北黃海多種環(huán)境因素如水溫、鹽度、濁度、溶解氧、以及在秋冬季加劇入侵的黃海暖流等綜合因素的反應(yīng)。 （3）在使用尸積群有孔蟲(chóng)還原古環(huán)境的過(guò)程中，要考慮部分膠結(jié)殼有孔蟲(chóng)在埋藏過(guò)程中殼體可能會(huì)破損、溶解，尤其是在恢復(fù)渤海北黃海古環(huán)境時(shí)，，要充分考慮如V. advena、Trochammina sp.、Ammoscalaria sp.和P. asiatica等膠結(jié)殼有孔蟲(chóng)在尸積群中的遺失，否則會(huì)低估了這些膠結(jié)殼屬種指示環(huán)境的能力。 第二，對(duì)2012年5月分別取自渤海的B42站和北黃海的B24站的兩根短柱進(jìn)行高精度取樣分析，包括底棲有孔蟲(chóng)的屬種鑒定、組合劃分、以及沉積物粒度分析、210Pb測(cè)年，結(jié)合短柱中有孔蟲(chóng)屬種、組合劃分，優(yōu)勢(shì)屬種活體在研究區(qū)的分布情況，以及RDA結(jié)果，對(duì)研究區(qū)（渤海、北黃海）近幾十年海洋環(huán)境變化進(jìn)行討論。
[Abstract]:This paper mainly carries on two aspects of research work. Firstly, the benthic foraminifera in 50 samples of surface sediments of Huang Hai in spring (May) and 46 samples in autumn (November) in North Bohai Sea during the comprehensive Huang Hai survey of the North Bohai Sea in 2012 were analyzed qualitatively and quantitatively. The genera and species composition of living benthic foraminifera community in different seasons, the distribution characteristics of living benthic foraminifera and the distribution range of living foraminifera in different seasons were discussed. And the difference between foraminifera and foraminifera in species and distribution. Combined with RDA (redundancy analysis), the living environment parameters such as temperature, salinity, water depth, turbidity, chlorophyll, dissolved oxygen and so on of foraminifera in spring and autumn were analyzed. The direct relationship between the living foraminifera and its living environment parameters was further discussed. The main results are as follows: (1) the seasonal variation of living foraminifera is very large, which is manifested in the distribution of high abundance areas. The differences in combination in spring and autumn are mainly affected by living environment factors, and the living foraminifera are extremely sensitive to their living environment. (2) the correlation between living foraminifera and its living environment parameters was compared with RDA. It was found that A. tasmanensis, N. stella and Bulimina sp. in spring. It was positively correlated with depth, density and salinity, negatively correlated with chlorophyll content. B.frigida, V.advena and dissolved oxygen, and negatively correlated with water temperature. C. subincertum was positively correlated with turbidity and water temperature. There was a significant positive correlation between V. advena and seawater salinity. P. tuberculatum and A.beccarii vars. There was a negative correlation between salinity and salinity. In autumn, the range of live P. tuberculatum assemblages was enlarged, and the range of C. subincertum and P. tuberculatum combinations was reduced. In spring, the dominant foraminifera, B. frigida, which lives along the southern coast of the Liaodong Peninsula, was replaced by the V. advena combination in autumn. The seasonal variation of benthic foraminifera species is related to many environmental factors such as water temperature, salinity, turbidity, dissolved oxygen in Huang Hai in the northern Bohai Sea. And the reaction of the combined factors such as the Huang Hai warm current, which aggravated the invasion in autumn and winter. (3) in the process of reducing paleoenvironment by foraminifera, it is necessary to consider that some of the cemented shell foraminifera may be damaged and dissolved during burial. Especially in the restoration of the Huang Hai paleoenvironment in the northern Bohai Sea, such as V. advena Trochammina sp. Ammoscalaria sp. should be taken into account. The loss of cemented shell foraminifera, such as P. asiatica, in the aggregates would underestimate the ability of these cementitious shell species to indicate the environment. Secondly, the high-precision sampling analysis of two short columns taken from B42 station in Bohai Sea and B24 station in North Huang Hai in May 2012 was carried out, including the identification of benthic foraminifera, assemblage classification, and sediment granularity analysis (210Pb) dating. Combined with foraminifera species, assemblage and distribution of dominant genera in the study area, and the results of RDAs, the marine environmental changes in the study area (Bohai Sea, North Huang Hai) in recent decades were discussed.
【學(xué)位授予單位】：中國(guó)海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：Q915;P736.22

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