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Variability of skeletal growth and delta C-13 in massive corals from the South China Sea: Effects of photosynthesis, respiration and human activities
Sun, DH; Su, RX; McConnaughey, TA; Bloemendal, J; dhsun@lzu.edu.cn; srx@scsio.ac.cn; mcconnat@gmail.com; jan@liv.ac.uk
2008
Source PublicationCHEMICAL GEOLOGY
ISSN0009-2541
Volume255Issue:40606Pages:414-425
AbstractThe delta C-13, skeletal density and extension rates were analyzed along same growth axes of massive coral colonies collected from the shallow sea to the east and south of Hainan Island, northern South China Sea. Seasonal changes of delta C-13, extension and calcification rates of Porites lutea and Porites lobata are in phase and correlated with solar radiation. In addition, annual high delta C-13 values, extension and calcification rates occur in spring and low values and rates occur in late autumn or early winter. The annual highest density band of P. lutea formed in spring and the lowest ones in early winter, whereas R lobata shows only a weak seasonal density change. We suggest that the seasonal features of the coral delta C-13, extension and calcification rates are modulated by light-induced photosynthesis determined by solar radiation reaching the top of the atmosphere, and by cloud coverage. The results also support the suggestion that photosynthesis promotes both the extension growth and skeleton thickening for P. lutea, but that it mainly promotes the extension growth for P. lobata. Remarkable inter-decadal trends are evident in the coral records; these trends are progressive decreases of skeletal delta C-13, density and calcification rate, and an increase of the extension rate over the last 30 years, which are marked by abrupt changes at about 1987. These trends are ascribed to intensified coral respiration arising from rising temperature, together with the effects of declining nutrient levels caused by the destruction of the coastal ecosystem in the sampling regions. (C) 2008 Elsevier B.V. All rights reserved.
Department[Sun, Donghuai] Lanzhou Univ, Minist Educ, Key Lab W Chinas Environm Syst, Lanzhou 730000, Peoples R China; [Sun, Donghuai; Su, Ruixia] Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Bloemendal, Jan] Univ Liverpool, Dept Geog, Liverpool L69 7ZT, Merseyside, England
KeywordCoral Growth Carbon Isotopes Photosynthesis South China Sea
Subject AreaGeochemistry & Geophysics
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Indexed Bysci
Funding Project海洋地质
WOS IDWOS:000260919600010
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Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/4526
Collection中科院边缘海地质重点实验室
Corresponding Authordhsun@lzu.edu.cn; srx@scsio.ac.cn; mcconnat@gmail.com; jan@liv.ac.uk
Recommended Citation
GB/T 7714
Sun, DH,Su, RX,McConnaughey, TA,et al. Variability of skeletal growth and delta C-13 in massive corals from the South China Sea: Effects of photosynthesis, respiration and human activities[J]. CHEMICAL GEOLOGY,2008,255(40606):414-425.
APA Sun, DH.,Su, RX.,McConnaughey, TA.,Bloemendal, J.,dhsun@lzu.edu.cn.,...&jan@liv.ac.uk.(2008).Variability of skeletal growth and delta C-13 in massive corals from the South China Sea: Effects of photosynthesis, respiration and human activities.CHEMICAL GEOLOGY,255(40606),414-425.
MLA Sun, DH,et al."Variability of skeletal growth and delta C-13 in massive corals from the South China Sea: Effects of photosynthesis, respiration and human activities".CHEMICAL GEOLOGY 255.40606(2008):414-425.
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