کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6305535 | 1618570 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Long-chain n-alkenes in recent sediment of Lake Lugu (SW China) and their ecological implications
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Long-chain n-alkenes showing a predominance of n-C25:1 and n-C27:1 were detected in recent sediment of Lake Lugu, an oligotrophic alpine lake in Yunnan Province, SW China. The abundances of n-C25:1 and n-C27:1 alkenes varied considerably in the sediment core, most obviously in showing higher values during the period of 1821-1982, followed by a significant decrease between 1982 and 2012. Such variations were similar to those of long-chain 1,15-alkyl diols, biomarkers of eustigmatophytes, and a significant correlation was observed between n-C25:1 (or n-C27:1) alkene and C32 1,15-alkyl diol in the sediment core. This correlation and the fact that long-chain n-alkenes in some eustigmatophytes (e.g., Nannochloropsis sp.) were dominated by C25 and C27 compounds indicates that eustigmatophytes were the most likely contributor of the long-chain n-alkenes (especially the n-C25:1 and n-C27:1 alkenes) in Lake Lugu sediment. Chlorophytes, on the other hand, cannot be excluded as a possible contributor of the long-chain n-alkenes because these algae are common in Lake Lugu and they are known to biosynthesize n-C27:1 alkene. Productivities for some species of eustigmatophytes and chlorophytes considerably decreased when the lake water was heavily influenced by catchment soil erosion and anthropogenic sewage inputs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Limnologica - Ecology and Management of Inland Waters - Volume 52, May 2015, Pages 30-40
Journal: Limnologica - Ecology and Management of Inland Waters - Volume 52, May 2015, Pages 30-40
نویسندگان
Zhang Yongdong, Su Yaling, Liu Zhengwen, Chen Xiangchao, Yu Jinlei, Di Xiaodan, Jin Miao,