Burial fluxes and source apportionment of carbon in culture areas of Sanggou Bay over the past 200 years
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Burial fluxes and source apportionment of carbon in culture areas of Sanggou Bay over the past 200 years LIU Sai1, 2, HUANG Jiansheng1, 3, YANG Qian1, YANG Shu1, YANG Guipeng2, SUN Yao1* 1 Key Laboratory of Sustainable Development of Marine Fisheries of Ministry of Agriculture, Yellow Sea Fisheries
Research Institute, Chinese Fisheries Science Academy, Qingdao 266071, China 2 Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education, College of Chemistry and
Chemical Engineering, Ocean University of China, Qingdao 266100, China 3 College of Ocean and Earth Science, Xiamen University, Xiamen 361005, China
Received 16 July 2014; accepted 24 October 2014 ©The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg 2015
Abstract
In this study, we assessed the burial fluxes and source appointment of different forms of carbon in core sediments collected from culture areas in the Sanggou Bay, and preliminarily analyzed the reasons for the greater proportion of inorganic carbon burial fluxes (BFTIC). The average content of total carbon (TC) in the Sanggou Bay was 2.14%. Total organic carbon (TOC) accounted for a small proportion in TC, more than 65% of which derived from terrigenous organic carbon (Ct), and while the proportion of marine-derived organic carbon (Ca) increased significantly since the beginning of large-scale aquaculture. Total inorganic carbon (TIC) accounted for 60%–75% of TC, an average of which was 60%, with a maximum up to 90% during flourishing periods (1880–1948) of small natural shellfish derived from seashells inorganic carbon (Shell-IC). The TC burial fluxes ranged from 31 g/(m2·a) to 895 g/(m2·a) with an average of 227 g/(m2·a), which was dominated by TIC (about 70%). Shell-IC was the main source of TIC and even TC. As the main food of natural shellfish, biogenic silica (BSi) negatively correlated with BFTIC through affecting shellfish breeding. BFTIC of Sta. S1, influenced greatly by the Yellow Sea Coastal Current, had a certain response to Pacific Decadal Oscillation (PDO) in some specific periods. Key words: carbon sources, carbon burial fluxes, shells inorganic carbon (Shell-IC), marine-derived organic carbon (Ca), Sanggou Bay Citation: Liu Sai, Huang Jiansheng, Yang Qian, Yang Shu, Yang Guipeng, Sun Yao. 2015. Burial fluxes and source apportionment of carbon in culture areas of Sanggou Bay over the past 200 years. Acta Oceanologica Sinica, doi: 10.1007/s13131-015-0724-6
1 Introduction Marginal seas play an important role in global carbon cycle; they host 20%–50% of global marine primary production and 90% of global marine organic carbon burial fluxes (Walsh, 1991; Song, 2011). Analyzing the source of organic carbon in sediments of marginal seas is essential for understanding the global carbon cycle (Li and Song, 2004). Many studies on sources of organic carbon (OC) have been carried out in the marginal seas. Tesi et al. (2013) assessed the flux and burial of OC in the Adriatic Sea (Mediterranean Sea). In this area, terrigenous OC is the dominant O
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