TY  - JOUR
A1  - Sommer, Robert S.
A1  - Kalbe, Johannes
A1  - Ekstrom, Jonas
A1  - Benecke, Norbert
A1  - Liljegren, Ronnie
T1  - Range dynamics of the reindeer in Europe during the last 25,000 years
JF  - Journal of biogeography
N2  - Aim To understand the role and significance of the reindeer, Rangifer tarandus (Linnaeus, 1758), as a specific indicator in terms of late Quaternary biogeography and to determine the effects of global climate change on its range and local extinction dynamics at the end of the Ice Age.
 Location Late Pleistocene/early Holocene range of reindeer over all of central and western Europe, including southern Scandinavia and northern Iberia, but excluding Russia, Belarus and the Ukraine.
 Methods Radiocarbon-dated subfossil records of R. tarandus from both archaeological and natural deposits younger than 25,000 years were assembled in a database. The distribution area was divided into six representative regions. The C-14 dates were calibrated and plotted chronologically in maps in order to compare presence and absence and regional extinction patterns from one region to another.
 Main conclusions The late Quaternary record for reindeer in Europe during the last 25 kyr shows a climate-driven dispersal and retreat in response to climate change, with regional variations. The collapse of the mammoth steppe biome did not lead to the local extinction in Europe, as in the case of other megafaunal species. Rangifer tarandus co-existed for about 3000 years during the Late Glacial and early Holocene with typical temperate species such as red deer and roe deer in non-analogue faunal communities. The regional extinction at the end of the Pleistocene coincides with the transition from light open birch/pine forests to pine/deciduous forests.
KW  - Climate change
KW  - environmental change
KW  - extinction
KW  - global change
KW  - late Quaternary
KW  - Pleistocene/Holocene transition
KW  - Rangifer tarandus
KW  - reindeer
Y1  - 2014
U6  - https://doi.org/10.1111/jbi.12193
SN  - 0305-0270
SN  - 1365-2699
VL  - 41
IS  - 2
SP  - 298
EP  - 306
PB  - Wiley-Blackwell
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Prasad, Sushma
A1  - Mishra, Praveen Kumar
A1  - Menzel, Philip
A1  - Gaye, Birgit
A1  - Jehangir, Arshid
A1  - Yousuf, Abdul R.
T1  - Testing the validity of productivity proxy indicators in high altitude Tso Moriri Lake, NW Himalaya (India)
JF  - Palaeogeography, palaeoclimatology, palaeoecology : an international journal for the geo-sciences
N2  - We use multiple proxies (delta C-13(org), delta N-15(org), 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 (delta C-13, delta N-15) 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. (C) 2016 Elsevier B.V. All rights reserved.
KW  - Tso Moriri Lake
KW  - isotopes
KW  - lacustrine primary productivity (LPP)
KW  - Indian monsoon
KW  - late Quaternary
Y1  - 2016
U6  - https://doi.org/10.1016/j.palaeo.2016.02.027
SN  - 0031-0182
SN  - 1872-616X
VL  - 449
SP  - 421
EP  - 430
PB  - Elsevier
CY  - Amsterdam
ER  -