周洋, 陈芳, 苏新, 刘广虎, 陈超云. 南海东沙海域HD319岩心富甲烷环境底栖有孔虫群落结构[J]. 海洋地质与第四纪地质, 2009, 29(3): 1-8. DOI: 10.3724/SP.J.1140.2009.03001
引用本文: 周洋, 陈芳, 苏新, 刘广虎, 陈超云. 南海东沙海域HD319岩心富甲烷环境底栖有孔虫群落结构[J]. 海洋地质与第四纪地质, 2009, 29(3): 1-8. DOI: 10.3724/SP.J.1140.2009.03001
ZHOU Yang, CHEN Fang, SU Xin, LIU Guanghu, CHEN Chaoyun. BENTHIC FORAMINIFERA COMMUNITIES IN METHANE-RICH ENVIRONMENT SHOWED BY CORE HD319 IN DONGSHA SEA AREA OF THE SOUTH CHINA SEA[J]. Marine Geology & Quaternary Geology, 2009, 29(3): 1-8. DOI: 10.3724/SP.J.1140.2009.03001
Citation: ZHOU Yang, CHEN Fang, SU Xin, LIU Guanghu, CHEN Chaoyun. BENTHIC FORAMINIFERA COMMUNITIES IN METHANE-RICH ENVIRONMENT SHOWED BY CORE HD319 IN DONGSHA SEA AREA OF THE SOUTH CHINA SEA[J]. Marine Geology & Quaternary Geology, 2009, 29(3): 1-8. DOI: 10.3724/SP.J.1140.2009.03001

南海东沙海域HD319岩心富甲烷环境底栖有孔虫群落结构

BENTHIC FORAMINIFERA COMMUNITIES IN METHANE-RICH ENVIRONMENT SHOWED BY CORE HD319 IN DONGSHA SEA AREA OF THE SOUTH CHINA SEA

  • 摘要: 对南海东北部东沙海域HD319岩心富甲烷环境和非富甲烷环境底栖有孔虫进行对比研究,旨在探讨富甲烷环境对底栖有孔虫群落结构的影响。结果表明,该岩心富甲烷环境和非富甲烷环境的底栖有孔虫组成有所差异:富甲烷缺氧环境底栖有孔虫群落中耐低氧类内生种群占绝对优势,Uvigerina(U.peregerina,U.hispido-costata,U.rugosa,U.probscidea,U.spp.),Bulimina(B.aculeata,B.mexicana),Bolivina(B.bradyi,B.quadrilatera),Globocassidulina subglobosa,Brizalina superba,Hoglundina elegans等冷泉甲烷相关种大量出现;非富甲烷一般低氧环境下底栖有孔虫以内生种含量占优势,表生种和旋向种零星出现;富氧环境下底栖有孔虫以表生种和旋向种占优势,受有机碳含量变化控制明显。推测底栖有孔虫这种群落结构的差异是适应高甲烷含量的结果,底栖有孔虫对富甲烷环境的响应通过群落结构的差异表现出来。

     

    Abstract: Faunal communities of benthic foraminifera in core HD319 in Dongsha area of the South China Sea have been studied in order to investigate the effects of gas methane on benthic foraminiferal populations. Different benthic foraminiferal assemblages were identified between methane-rich environment and non-methane environment. In methane-rich and strongly dysoxic environment,only methane-relative (methane-tolerant) species Uvigerina (U. peregerina,U. hispido-costata, U.rugosa,U. probscidea,spp.),Bulimina (B.aculeata, B.mexicana), Globobulimina glabra,Globocassidulina globosa, Bolivina(B.bradyi, B.quadrilatera),Brizalina superba and Hoglundina elegans were identified; in non-methane and suboxic environment, infaunal species dominated all samples, but epifaunal or trochospire faunal was sporadically recorded.However, in non-methane and oxic environment, epifaunal or trochospire faunal is the dominant species and indicative of influence of intermediate to high seasonal flux of organic matter. The difference in faunal communities of benthic foraminifera between the methane-rich environment and non-methane environment can be explained as the effect of gas methane influence on benthic foraminifera.

     

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