CAJ | 학술논문

用气相色谱和气相色谱-质谱分析法分析了南极普里兹湾5个站位表层沉积物中多种生物标志物，探讨了其生态环境指示意义。结果显示：（1）湾内中心区总类脂物含量最高（1193μg·g-1），埃默里冰架区次之（572μg· g-1），陆坡区最低（341μg·g-1），且与沉积有机碳、总糖、生物硅、菜籽甾醇、表层海水叶绿素a等参数显著正相关（p＜0．1），表明底层有机质与上层水体浮游植物密切相关；（2）C27甾烷含量与C28甾烷显著负相关（p＜0．01），指示着晶磷虾与硅藻的食物链关系；（3）相对较高的饱和烃/芳烃比值（＞2．5）、较低的Pr/C17（＜0．5）和Pr/Ph（＜2）证明沉积有机质主要来源于硅藻等浮游植物，同时饱和烃双峰群（C17或C18和C29）的存在及较高含量的C29甾烷（35．79％）指示外域有机质输入，且湾中心区的（CPI＝1．60，Pr/Ph＝0．69）要高于陆坡区和冰架区（CPI＝1．01，Pr/Ph＝0．39）；（4）湾内中心区和冰架区脂肪酸C18：2/C18：0平均比值（0．78）要高于陆坡区（0．23）和低纬度地区（＜0．1），表明南极夏季普里兹湾陆坡区的表层海水温度要高于湾中心区和冰架区。
용기상색보화기상색보-질보분석법분석료남겁보리자만5개참위표층침적물중다충생물표지물，탐토료기생태배경지시의의。결과현시：（1）만내중심구총류지물함량최고（1193μg·g-1），애묵리빙가구차지（572μg· g-1），륙파구최저（341μg·g-1），차여침적유궤탄、총당、생물규、채자치순、표층해수협록소a등삼수현저정상관（p＜0．1），표명저층유궤질여상층수체부유식물밀절상관；（2）C27치완함량여C28치완현저부상관（p＜0．01），지시착정린하여규조적식물련관계；（3）상대교고적포화경/방경비치（＞2．5）、교저적Pr/C17（＜0．5）화Pr/Ph（＜2）증명침적유궤질주요래원우규조등부유식물，동시포화경쌍봉군（C17혹C18화C29）적존재급교고함량적C29치완（35．79％）지시외역유궤질수입，차만중심구적（CPI＝1．60，Pr/Ph＝0．69）요고우륙파구화빙가구（CPI＝1．01，Pr/Ph＝0．39）；（4）만내중심구화빙가구지방산C18：2/C18：0평균비치（0．78）요고우륙파구（0．23）화저위도지구（＜0．1），표명남겁하계보리자만륙파구적표층해수온도요고우만중심구화빙가구。
Multiple biomarkers has been analyzed by gas chromatography and gas chromatography-mass spectrum on sur-face sediments collected from 5 stations in Prydz Bay,East Antarctica,and its implication on ecology and environ-ment has been discussed.The results showed that the concentration of total lipids was highest in the center area of Prydz Bay (1 193 μg·g-1 ),follow by Amery Ice Shelf area (572 μg·g-1 ),and lowest in slope area (341 μg ·g-1 ).It was significantly positive correlated with sedimentary organic carbon,total neutral monosaccharides,bi-ogenic silica,brassicasterol,and chlorophyll a concentrations in surface sea water (p<0.1 ),and indicated that organic matter preserved in surface sediment was mainly from marine phytoplankton.The significantly negative cor-relation of relative concentrations between C27 and C28 steranes showed the food chain between Euphausia crystal-lorophias and diatoms.The relative high ratio of saturated hydrocarbons:arenes (>2.5),low ratios of Pr/C17(<0.5)and Pr/Ph (<2)inferred the sedimentary organic matter was largely contributed by diatoms.Meanwhile,the double peak of saturated hydrocarbons (C17 or C18,C29)and relative high concentration of C29 steranes (35.79%) showed terrestrial vascular plants input,and it was higher in the center area of Prydz Bay (CPI=1 .60,Pr/Ph=0.69)than the slope area and Amery Ice Shelf area (CPI=1.01,Pr/Ph=0.39).The ratio of C18:2/C18:0 for fatty acids was higher in sediment collected from the center area of Prydz Bay and Amery Ice Shelf area (0.78)than that from slope area of Prydz Bay (0.23)and lower latitude regions (<0.1),and indicated that during austral sum-mer,the surface sea temperature was higher in slope area of Prydz Bay than center area of Prydz Bay and Amery Ice Shelf area.