北极新奥尔松地区鸟粪土的分子有机地球化学研究  

MOLECULAR ORGANIC GEOCHEMISTRY OF ORNITHOGENIC SEDIMENT FROM SVALBARD,ARCTIC

作　　者：汪建君[1] 孙立广[1] 

机构地区：[1]中国科学技术大学极地环境研究室

出　　处：《极地研究》2007年第1期29-37,共9页Chinese Journal of Polar Research

基　　金：国家自然科学基金(40676004);国家海洋局第三海洋研究所所长启动基金资助项目

摘　　要：本文研究了位于北极地区的斯瓦尔巴(Svalbard)群岛上的新奥尔松(Ny-lesund)地区的鸟粪土层(YN)的分子有机地球化学组成特征。YN沉积物的烷烃呈双峰分布,奇偶优势不明显,烷烃组分包含UCM(不可分辨成分),姥鲛烷、惹烯是烷烃的主峰,表明烷烃组分受到附近三叠纪含煤地层的强烈影响。脂肪醇类组分偶奇优势明显,主要为现代生物来源。甾醇以谷甾醇为主,由于谷甾醇是草食动物粪便的主要甾醇,所以YN沉积物中谷甾醇可能来源于鸟粪。脂肪酸类组分的偶奇优势同样十分明显,不饱和脂肪酸以C18∶1为主,除脂肪酸外,还检测到β-羟基酸和ω-羟基酸。综合YN生物标志物的组成与分布特征,认为YN既受到附近含煤地层的影响,也受到附近的鸟粪和植被的影响。The molecular biomarker compositions of ornithogenic sediments （YN）, from Svalbard, Arctic were investigated. The results showed that n-alkanes had a bimodal pattern and their odd-even preference was not obvious. The alkanes contained unresolved complex mixtures （UCM）, and relatively higher levels of pristine and retene indicating pollution from the coal mines nearby. The n-alkanols in the sediments with even-to-odd preference might originate mainly from modern biota. The dominant sterol was sitosterol, which is the main sterol found in herbivores feces, indicating that sitosterol might be a marker of input from the birds feces in the sediments. The fatty acids of YN also showed even-to-odd preference, and the main unsaturated fatty acid is C18：1 acid. The α-hydroxyl acids and ω-hydroxyl fatty acids were also detected in the sediments. In summary, the YN sediments have inputs of organic matter from the adjacent coal mine and from bird feces and plants.

关 键 词：北极 鸟粪土沉积 生物标志物 谷甾醇 脂肪醇 脂肪酸 

分 类 号：Q95-3[生物学—动物学]