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Vegetational and climatic variations during the past 3100 yearsin southern India: evidence from pollen, magnetic susceptibilityand particle size data
Bhattacharyya,A(Bhattacharyya,Amalava)[1]; Sandeep,K(Sandeep,Kizhur)[2,3]; Misra,S(Misra,Sandhya)[1,6]; Shankar,R(Shankar,Rajasekhariah)[2]; Warrier,AK(Warrier,Anish K)[2,4]; Zhou,WJ(Zhou,Weijian)[5]; Lu,XF(Lu,Xuefeng)[5]
2015-08
Source PublicationEnvironmental Earth Sciences
Volume74Issue:4Pages:3559-3572
Subtype期刊论文
Abstract

Vegetational history vis a vis climate change during the past 3100 cal. years BP was deciphered from pollen data supplemented with magnetic susceptibility and particle size data for a 2.5 m long sediment core from Pookot Lake, Kerala, southern India. Pollen data suggest a mixed assemblage of upland tropical elements and wetland mangrove taxa. The presence of trace amounts of pollen grains of montane taxa like Betula, Pinus and Alnus points to their long distance dispersal. Pollen grains of Ixora, Syzygium, Symplocos, Moraceae and Arecaceae that represent tropical vegetation were also recovered, indicating modern vegetation in and around Pookot Lake. Mangrove elements are mostly represented by species of Rhizophora and Ceriops decandra along with other taxa. High-rainfall periods are characterised by high sand % and low clay % and vice versa. The pollen data correspond well with magnetic susceptibility and particle size data. The data obtained suggest three broad phases of climate, with minor oscillations, during the past 3100 cal. years BP: (1) wet climate during 3100–2500 cal. years BP; (2) dry climate spanning a long period that ended around 1000 cal. years BP; (3) amelioration in climate after 1000 cal. years BP, reflected in the presence of luxuriant vegetation and high magnetic susceptibility values.

KeywordPollen Palaeovegetation Magneticsusceptibility Pookot Lake Southern India
DOI10.1007/s12665-015-4415-6
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9543
Collection加速器质谱中心
Affiliation1.Birbal Sahni Institute of Palaeobotany, Lucknow 226007,India;
2.Department of Marine Geology, Mangalore University,Mangalagangotri 574199, India;
3.Present Address: Department of Post-Graduate Studies andResearch in Geology, Government College Kasaragod,Kasaragod, Kerala 671123, India;
4.Present Address: ESSO-National Centre for Antarctic andOcean Research, Ministry of Earth Sciences, Government ofIndia, Headland Sada, Vasco da Gama, Goa 403804, India;
5.Xi’an AMS Center, Institute of Earth Environment, Xi’an,China;
6.Present Address: Indian Institute of Technology,Gandhinagar, Gujarat 382424, India
Recommended Citation
GB/T 7714
Bhattacharyya,A,Sandeep,K,Misra,S,et al. Vegetational and climatic variations during the past 3100 yearsin southern India: evidence from pollen, magnetic susceptibilityand particle size data[J]. Environmental Earth Sciences,2015,74(4):3559-3572.
APA Bhattacharyya,A.,Sandeep,K.,Misra,S.,Shankar,R.,Warrier,AK.,...&Lu,XF.(2015).Vegetational and climatic variations during the past 3100 yearsin southern India: evidence from pollen, magnetic susceptibilityand particle size data.Environmental Earth Sciences,74(4),3559-3572.
MLA Bhattacharyya,A,et al."Vegetational and climatic variations during the past 3100 yearsin southern India: evidence from pollen, magnetic susceptibilityand particle size data".Environmental Earth Sciences 74.4(2015):3559-3572.
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