Abstract
AbstractSandy onshore deposits from tsunamis are difficult to distinguish from storm deposits, which makes it difficult to assess coastal hazards from the geological record. Here we analyse environmental DNA from microbial communities preserved in known tsunami and storm-deposited sediments and intercalating soils and non-marine sediments near Cuddalore, India, and Phra Thong Island, Thailand. Both sites were impacted by the 2004 Indian Ocean Tsunami and a subsequent storm flooding event (2011 Cyclone Thane at Cuddalore and a 2007 storm at Phra Thong Island). We show that the microbial communities in the overwash deposits are significantly different from soil and sediments that are not derived by overwash processes at both locations. Our method also successfully discriminates between modern tsunami deposits and storm deposits. We suggest molecular techniques have the potential to accurately discriminate overwash deposits from catastrophic natural events.
Funder
Ministry of Education - Singapore
National Research Foundation Singapore
Publisher
Springer Science and Business Media LLC
Subject
General Earth and Planetary Sciences,General Environmental Science
Reference73 articles.
1. Nicholls, R. J. et al. in Climate Change 2007: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (eds Parry, M. L., Canziani, O. F., Palutikof, J. P., van der Linden, P. J. & Hanson, C. E.) Ch. 6 (Cambridge University Press, 2007).
2. Gordon, M. et al. in Global Assessment Report on Disaster Risk Reduction Ch. 3 (UNDRR, 2019).
3. Dominey-Howes, D. Documentary and geological records of tsunamis in the Aegean Sea region of Greece and their potential value to risk assessment and disaster management. Nat. Hazards 25, 195–224 (2002).
4. Switzer, A. D., Yu, F., Gouramanis, C., Soria, J. & Pham, T. D. Integrated different records to assess coastal hazards at multi-century timescales. J. Coastal Res. 70, 723–728 (2014).
5. Jankaew, K. et al. Medieval forewarning of the 2004 Indian Ocean tsunami in Thailand. Nature 455, 1228–1231 (2008).
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献