DOI: 10.1016/j.palaeo.2016.02.027
论文题名: Testing the validity of productivity proxy indicators in high altitude Tso Moriri Lake, NW Himalaya (India)
作者: Prasad S. ; Mishra P.K. ; Menzel P. ; Gaye B. ; Jehangir A. ; Yousuf A.R.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 449 起始页码: 421
结束页码: 430
语种: 英语
英文关键词: Indian monsoon
; Isotopes
; Lacustrine primary productivity (LPP)
; Late Quaternary
; Tso Moriri Lake
英文摘要: We use multiple proxies (δ13Corg, δ15Norg, C/N, amino acids, biogenic silica) from the catchment, lake surface and core sediments to (i) identify the factors influencing conventional lacustrine primary productivity (LPP) indicators (isotopic covariance, C/N) in the sediments from the pristine high altitude Tso Moriri Lake during the late Quaternary, (ii) compare C/N and bulk organic isotopic data from the core with available biogenic silica and amino acid data to test the applicability of conventional LPP indicators during the late Quaternary, and (iii) evaluate the degree of sensitivity of LPP to climate change. Our results show that climate driven changes in water salinity and source water changes have influenced the isotopic (δ13C, δ15N) content of the lake water and hence the isotopic composition of bulk organic matter. Erosion has also played a role in masking the LPP as the catchment sediments from this high altitude lake have low C/N thereby casting doubt on the effectiveness of this parameter as an LPP indicator. Independent LPP indicators in Tso Moriri sediments clearly indicate that it is driven by climate change and increases during warmer periods. However, our data show that the LPP in recent times is not much higher than during the early Holocene, ruling out any impact of recent warming on LPP and therefore the possibility of large carbon sequestration in high altitude oligotrophic lakes. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68486
Appears in Collections: 过去全球变化的重建
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作者单位: Institute for Earth- and Environmental Science, University of Potsdam, Karl-Liebknecht-Straße 24-25, Potsdam, Germany; Universität Hamburg, Institute of Biogeochemistry and Marine Chemistry, Hamburg, Germany; Limnology and Fisheries Laboratory, Centre of Research for Development, University of Kashmir, India
Recommended Citation:
Prasad S.,Mishra P.K.,Menzel P.,et al. Testing the validity of productivity proxy indicators in high altitude Tso Moriri Lake, NW Himalaya (India)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,449