Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae)

doi:10.1016/j.orggeochem.2007.04.007

	Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae)
	Sun, Qing ; Chu, Guoqiang ; Liu, Guoxiang ; Li, Song ; Wang, Xiaohua
刊名	ORGANIC GEOCHEMISTRY
	2007
卷号	38 期号:8 页码:1226-1234
ISSN号	0146-6380
DOI	10.1016/j.orggeochem.2007.04.007
文献子类	Article
英文摘要	Although long chain alkenones (LCKs) occur widely in lacustrine sediments, their origin is not clear. Here, we report a lacustrine source, the non-calcifying species Chrysotila lamellosa Anand (Haptophyceae), collected and isolated from an inland saline water body, Lake Xiarinur (Inner Mongolia, China). Its alketione pattern is similar to those of coastal marine strains of C lamellosa,but the relationship between U-37(K') index and culture temperature for the lacustrine species is quite different from that of the coastal species. A significant feature of the alkenones in this strain of C lamellosa is a lack of C-38 methyl alkenones, which might be used to distinguish the species from the marine haptophyte species Emiliania huxleyi and Gephyrocapsa oceanica. The higher C-38 tetraunsaturated compound abundance might be another important feature for distinguishing the C lamellosa alkenone producer from the coastal species Isochrysis galbana. This alkenone distribution pattern has been detected in many lakes, which suggests that C lamellosa or a closely related species might be a very common alkenone precursor in lacustrine systems. We examined U-37(K') and U-37(K) values for C lamellosa as a function of culture temperature in a batch culture experiment. The calibration for U-37(K') vs. culture temperature (T) was U-37(K') = 0.0011 x T-2 - 0.0157 x T + 0.1057(n = 14, r(2) = 0.99) from 10 degrees C to 22 degrees C or U-37(K') = 0.0257 x T - 0.2608(n = 9, r(2) = 0.97) from 14 degrees C to 22 degrees C. U-37(K) vs. culture temperature was U-37(K) = 0 0377 x T - 0.5992(n = 14, r(2) = 0.98) from 10 degrees C to 22 degrees C. Our experiments show that the alkenone unsaturation index (U-37(K')) is strongly controlled by culture temperature and can be used for palaeoclimate reconstruction. (C) 2007 Elsevier Ltd. All rights reserved.
WOS关键词	LONG-CHAIN-ALKENONES ; SEA-SURFACE TEMPERATURES ; EASTERN NORTH-ATLANTIC ; EMILIANIA-HUXLEYI ; GEPHYROCAPSA-OCEANICA ; ALKYL ALKENOATES ; NUTRIENT CONCENTRATIONS ; MICROBIAL-DEGRADATION ; ISOCHRYSIS-GALBANA ; EARLY DIAGENESIS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000249328000003
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/67306]
专题	中国科学院地质与地球物理研究所
通讯作者	Chu, Guoqiang
作者单位	1.Natl Res Ctr Geoanal, Beijing 100037, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Sun, Qing,Chu, Guoqiang,Liu, Guoxiang,et al. Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae)[J]. ORGANIC GEOCHEMISTRY,2007,38(8):1226-1234.
APA	Sun, Qing,Chu, Guoqiang,Liu, Guoxiang,Li, Song,&Wang, Xiaohua.(2007).Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae).ORGANIC GEOCHEMISTRY,38(8),1226-1234.
MLA	Sun, Qing,et al."Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae)".ORGANIC GEOCHEMISTRY 38.8(2007):1226-1234.