海洋学报（中文版）
海洋學報（中文版）
해양학보（중문판）
ACTA OCEANOLOGICA SINICA
2013年
6期
75-85
,共11页
朱小畏%茅晟懿%吴能友%孙永革%管红香
硃小畏%茅晟懿%吳能友%孫永革%管紅香
주소외%모성의%오능우%손영혁%관홍향
脂肪酸%硫酸盐还原菌%硫氧化菌%神狐海域
脂肪痠%硫痠鹽還原菌%硫氧化菌%神狐海域
지방산%류산염환원균%류양화균%신호해역
fatty acid%sulfate reducing bacteria%sulfur oxidizing bacteria%Shenhu Area
通过对神狐海域表层5个沉积物样品进行脂肪酸组成及其碳同位素分布特征测试和研究，结果表明总脂肪酸含量分布为5.14～8.99μg/g ，碳数分布范围从C12到C32，类型包括正构饱和脂肪酸、支链脂肪酸、单不饱和脂肪酸、多不饱和脂肪酸和类异戊二烯酸等计48种；样品中饱和的短链脂肪酸主要来自细菌与浮游生物，而长链饱和脂肪酸来自陆源高等植物，其比例表明研究海域中海洋细菌与浮游生物输入量远远大于陆源高等植物的输入。支链脂肪酸10me16∶0与单不饱和脂肪酸18∶1ω9、16∶1ω9主要来自硫酸盐还原菌，而单不饱和脂肪酸16∶1ω7很大可能来源于硫氧化菌，比较相对含量得出神狐海域表层沉积物为还原环境。样品中检测出8种类异戊二烯酸，主要是植烷酸和17，21-ββ二升藿烷酸，及少量的姥鲛酸，推测为叶绿素a和细菌微生物的共同贡献。
通過對神狐海域錶層5箇沉積物樣品進行脂肪痠組成及其碳同位素分佈特徵測試和研究，結果錶明總脂肪痠含量分佈為5.14～8.99μg/g ，碳數分佈範圍從C12到C32，類型包括正構飽和脂肪痠、支鏈脂肪痠、單不飽和脂肪痠、多不飽和脂肪痠和類異戊二烯痠等計48種；樣品中飽和的短鏈脂肪痠主要來自細菌與浮遊生物，而長鏈飽和脂肪痠來自陸源高等植物，其比例錶明研究海域中海洋細菌與浮遊生物輸入量遠遠大于陸源高等植物的輸入。支鏈脂肪痠10me16∶0與單不飽和脂肪痠18∶1ω9、16∶1ω9主要來自硫痠鹽還原菌，而單不飽和脂肪痠16∶1ω7很大可能來源于硫氧化菌，比較相對含量得齣神狐海域錶層沉積物為還原環境。樣品中檢測齣8種類異戊二烯痠，主要是植烷痠和17，21-ββ二升藿烷痠，及少量的姥鮫痠，推測為葉綠素a和細菌微生物的共同貢獻。
통과대신호해역표층5개침적물양품진행지방산조성급기탄동위소분포특정측시화연구，결과표명총지방산함량분포위5.14～8.99μg/g ，탄수분포범위종C12도C32，류형포괄정구포화지방산、지련지방산、단불포화지방산、다불포화지방산화류이무이희산등계48충；양품중포화적단련지방산주요래자세균여부유생물，이장련포화지방산래자륙원고등식물，기비례표명연구해역중해양세균여부유생물수입량원원대우륙원고등식물적수입。지련지방산10me16∶0여단불포화지방산18∶1ω9、16∶1ω9주요래자류산염환원균，이단불포화지방산16∶1ω7흔대가능래원우류양화균，비교상대함량득출신호해역표층침적물위환원배경。양품중검측출8충류이무이희산，주요시식완산화17，21-ββ이승곽완산，급소량적모교산，추측위협록소a화세균미생물적공동공헌。
The lipid biomarkers of fatty acids in the surface sediments from Shenhu Area ,northern South China Sea continental slope were investigated in the present paper .The total contents of the fatty acid from the sediments a-mounts to 5.14 ~ 8.99 μg/g ,and its carbon number ranges from C12 to C32 .The fatty acid includes 48 types such as the saturated fatty acid ,branched fatty acid ,monounsaturated fatty acid ,polyunsaturated fatty acid and isopre-noid acid .In these five samples ,the short chain saturated fatty acid mainly came from bacteria and planktons ,while the long chain saturated fatty acid was from the terrigenous higher plants .Their ratio indicates that the input of marine bacteria and planktons is far more than that of the terrigenous higher plant in the studied area . The branched fatty acid 10me16∶0 and monounsaturated fatty acid 18∶1ω9、16∶1ω9 are mainly synthesized by the sulfate reducing bacteria ,while 16∶1ω7 is from the sulfur oxidizing bacteria .Comparison of the relative content of them ,the author believes that the surface sediments of the Shenhu area may be embraced by reducing environment . In addition ,eight isoprenoid acids detected in the samples ,mainly phytanic acid and 17β(H) ,21β(H)-32-hopanoic acid ,and a small amount of the pristane acid ,presumably for the joint contribution of chlorophyll A and bacterial microorganisms .
