Journal
LIMNOLOGICA
Volume 52, Issue -, Pages 30-40Publisher
ELSEVIER GMBH
DOI: 10.1016/j.limno.2015.02.004
Keywords
Biomarker; n-Alkene; Sediment; Lake Lugu; Ecosystem
Categories
Funding
- National Basic Research Program of China [2012CB956100]
- National Science Foundation of China [41303036, U1033602]
- Key Project of 135 program of Nanjing Institute of Geography and Limnology [NIGLA52012135007]
Ask authors/readers for more resources
Long-chain n-alkenes showing a predominance of n-C-25:1 and n-C-27:1 were detected in recent sediment of Lake Lugu, an oligotrophic alpine lake in Yunnan Province, SW China. The abundances of n-C-25:1 and n-C-27:1 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-C-25:1 (or n-C-27:1) alkene and C-32 1,15-alkyl dial in the sediment core. This correlation and the fact that long-chain n-alkenes in some eustigmatophytes (e.g., Nannochloropsis sp.) were dominated by C-25 and C-27 compounds indicates that eustigmatophytes were the most likely contributor of the long-chain n-alkenes (especially the n-C-25:1 and n-C-27:1 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-C-27:1 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. (C) 2015 Elsevier GmbH. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available