Vegetational and climatic variations during the past 3100 years in southern India: evidence from pollen, magnetic susceptibility and particle size data

Amalava Bhattacharyya, Kizhur Sandeep, Sandhya Misra, Rajasekhariah Shankar, Anish K. Warrier, Zhou Weijian, Lu Xuefeng

Research output: Contribution to journalArticle

10 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)3559-3572
Number of pages14
JournalEnvironmental Earth Sciences
Volume74
Issue number4
DOIs
Publication statusPublished - 25-08-2015

Fingerprint

magnetic susceptibility
Magnetic susceptibility
particle size
pollen
Particle size
India
Lakes
climate
vegetation
Wetlands
Ceriops decandra
Climate change
Ixora
mangrove
Symplocos
Rain
Sediments
Clay
Rhizophora
Syzygium

All Science Journal Classification (ASJC) codes

  • Global and Planetary Change
  • Environmental Chemistry
  • Water Science and Technology
  • Soil Science
  • Pollution
  • Geology
  • Earth-Surface Processes

Cite this

Bhattacharyya, Amalava ; Sandeep, Kizhur ; Misra, Sandhya ; Shankar, Rajasekhariah ; Warrier, Anish K. ; Weijian, Zhou ; Xuefeng, Lu. / Vegetational and climatic variations during the past 3100 years in southern India : evidence from pollen, magnetic susceptibility and particle size data. In: Environmental Earth Sciences. 2015 ; Vol. 74, No. 4. pp. 3559-3572.
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Vegetational and climatic variations during the past 3100 years in southern India : evidence from pollen, magnetic susceptibility and particle size data. / Bhattacharyya, Amalava; Sandeep, Kizhur; Misra, Sandhya; Shankar, Rajasekhariah; Warrier, Anish K.; Weijian, Zhou; Xuefeng, Lu.

In: Environmental Earth Sciences, Vol. 74, No. 4, 25.08.2015, p. 3559-3572.

Research output: Contribution to journalArticle

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AU - Bhattacharyya, Amalava

AU - Sandeep, Kizhur

AU - Misra, Sandhya

AU - Shankar, Rajasekhariah

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AU - Xuefeng, Lu

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