Mangrove development and its response to environmental change in Yingluo Bay (SW China).pdf

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Mangrove development and its response to environmental change in Yingluo Bay (SW China).pdf

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Mangrove development and its response to environmental change in Yingluo Bay (SW China)

Organic Geochemistry 85 (2015) 32–41Contents lists available at ScienceDirect Organic Geochemistry journal homepage: www.elsevier .com/locate /orggeochemMangrove development and its response to environmental change in Yingluo Bay (SW China) during the last 150 years: Stable carbon isotopes and mangrove pollen/10.1016/geochem.2015.04.003 0146-6380/ 2015 Elsevier Ltd. All rights reserved. ? Corresponding author at. First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China. Tel.: +86 532 fax: +86 532 E-mail addresses: pengxia@ (P. Xia), mxw@ (X. Meng).Peng Xia a, Xianwei Meng a,b,?, Zhen Li c, Aiping Feng a, Ping Yin d, Yongqiang Zhang a a First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China b Function Laboratory for Marine Geology, National Oceanography Laboratory, Qingdao 266061, China c State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China dQingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China a r t i c l e i n f o a b s t r a c tArticle history: Received 30 October 2014 Received in revised form 3 April 2015 Accepted 17 April 2015 Available online 25 April 2015 Keywords: Mangrove Carbon Isotope Pollen Environmental changeLocated at the interface of terrestrial and marine ecosystems, mangroves are particularly sensitive to environmental change. They provide a sedimentary sink for organic carbon, whereby cores can provide detailed records of mangrove species. We aimed to trace the history of mangrove development over the past 150 years in Yingluo Bay, SW China. Sedimentation rates (avg. 0.32 and 0.37 cm/year) were cal- culated on the basis of ln(210Pbex) vs. mass depth, and offset the rate of relative sea level rise (0.22– 0.24 cm/year), leading to a seaward expansion of new mangrove habitats. Chemical tracers (d13Corg and C:N) and an isotope mixing model were utilized to trace the contribution of mangrove