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DOI	10.18520/cs/v119/i4/649-660
	Diversity of diatom and carbon isotope characterization of soil organic matter in extreme climate, Sikkim Himalaya, India
	Dubey, Jyotsna; Thakur, Biswajeet; Agrawal, Shailesh; Sharma, Anupam; Morthekai, P.; Srivastava, Vaibhava; Ali, S. Nawaz
通讯作者	Dubey, J ; Ali, SN
来源期刊	CURRENT SCIENCE
ISSN	0011-3891
出版年	2020
卷号	119 期号:4 页码:649-660
英文摘要	Analysis of spatial variation of diatom assemblages and characterization of carbon isotopic composition of surface soil/sediment samples along three high-altitude transects (Chopta, Lashar and Gurudongmar valleys) in North Sikkim, Higher Himalaya have been done to delineate the ecological information (modern analogue). We have studied the variation in the distribution of diatom species and stable carbon composition in three different valleys having variable climatic conditions ranging from sub-humid to semi-arid. The results reveal that the biotic components respond appreciably towards varying environmental conditions. The spatial distribution of diatoms in surface sediments seems to be controlled by physical parameters such as temperature, water and nutrient availability. The overall delta C-13 values vary from -25 parts per thousand to -29 parts per thousand, suggesting a C-3-dominated vegetation in the region. Higher delta C-13 values are observed in Gurudongmar samples that are characterized by less moisture and low temperature. The delta C-13 values suggest that the source of organic matter in soil/sediment is contributed by open grasslands (C-3 grasses). The isotope values clearly demonstrate an increase in delta C-13 values along with a progressive increase in elevation and decrease in precipitation. The present data will serve as an important archive for future correlations in palaeoclimatic studies.
英文关键词	Carbon isotopes diatom distribution extreme climate modern analogue soil organic matter
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000562180400024
WOS关键词	ASSEMBLAGES ; PLANTS ; DISCRIMINATION ; CONSERVATION ; VEGETATION ; EVOLUTION ; SEDIMENTS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325796
作者单位	[Dubey, Jyotsna; Thakur, Biswajeet; Agrawal, Shailesh; Sharma, Anupam; Morthekai, P.; Ali, S. Nawaz] Birbal Sahni Inst Palaeosci, Lucknow 226007, Uttar Pradesh, India; [Srivastava, Vaibhava] Banaras Hindu Univ, Fac Sci, Dept Geol, Varanasi 221005, Uttar Pradesh, India
推荐引用方式 GB/T 7714	Dubey, Jyotsna,Thakur, Biswajeet,Agrawal, Shailesh,et al. Diversity of diatom and carbon isotope characterization of soil organic matter in extreme climate, Sikkim Himalaya, India[J],2020,119(4):649-660.
APA	Dubey, Jyotsna.,Thakur, Biswajeet.,Agrawal, Shailesh.,Sharma, Anupam.,Morthekai, P..,...&Ali, S. Nawaz.(2020).Diversity of diatom and carbon isotope characterization of soil organic matter in extreme climate, Sikkim Himalaya, India.CURRENT SCIENCE,119(4),649-660.
MLA	Dubey, Jyotsna,et al."Diversity of diatom and carbon isotope characterization of soil organic matter in extreme climate, Sikkim Himalaya, India".CURRENT SCIENCE 119.4(2020):649-660.