Volume 9 Issue 1
Feb.  2013
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YANG Dingtian, SHAN Xiujuan, LIU Sumin, YE Haibin, YANG Chaoyu, XU Chao, DONG Junde. Spatial and temporal distribution of pH in Sanya Bay in recent 10 years and its effects on coral reef[J]. South China Fisheries Science, 2013, 9(1): 1-7. DOI: 10.3969/j.issn.2095-0780.2013.01.001
Citation: YANG Dingtian, SHAN Xiujuan, LIU Sumin, YE Haibin, YANG Chaoyu, XU Chao, DONG Junde. Spatial and temporal distribution of pH in Sanya Bay in recent 10 years and its effects on coral reef[J]. South China Fisheries Science, 2013, 9(1): 1-7. DOI: 10.3969/j.issn.2095-0780.2013.01.001
shu

Spatial and temporal distribution of pH in Sanya Bay in recent 10 years and its effects on coral reef

  • 1.

    State Key Lab. of Oceanography in the Tropics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China

  • 2.

    Shandong Provincial Key Lab. of Fishery Resources and Ecological Environment, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China

  • 3.

    State Key Lab.of Lake Science and Environment, Nanjing 210008, China

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  • Received Date: July 11, 2012
  • Revised Date: September 15, 2012
    Graphical Abstract
    • Abstract

  • According to the 10-year monitoring data of pH in Sanya Bay, the ranges of pH in the surface and bottom water are 8.01~8.23 and 8.01~8.24, respectively, with 8.14 on average. The pH has showed a decreasing trend since 2001, decreasing from 8.30 to 8.07 on annual average during 2001~2010, which is greater than the global ocean acid velocity. Four types of vertical distributions of pH are found in Sanya Bay: 1) Upper layer is smaller while bottom layer is greater; 2) Upper layer and bottom layer are greater while middle layer is smaller; 3) Upper layer and bottom layer are smaller while middle layer is greater; 4) Upper layer, middle layer and bottom layer reveal an obvious decreasing trend. From the aspect of horizontal distribution, the pH varies greatly in different seasons and lower pH is mainly found in the estuary. By analyzing the effects of pH on coral reef, we find that when the pH increased from 7 to 8, the content of dissolved calcium decreased from 12 mg·L-1 to 1 mg·L-1. Therefore, the pH in Sanya Bay is currently still within the range of normal growth of coral reef (8.0~8.3), and no negative effects are found.

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    • References (18)
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