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Diseases and compromised health states of massive porites spp. in the Gulf of Thailand and the Andaman Sea

Acta Oceanologica Sinica 2019年第1期38卷 118-127页

作者： Watchara Samsuvan Thamasak Yeemin Makamas Sutthacheep Sittiporn Pengsakun Juthamart Putthayakool Monthaphat Thummasan Department of Biology Faculty of Science Ramkhamhaeng University

In this study, we assess coral health by detecting the severity of coral diseases and compromised health states on massive porites. Field surveys are conducted at twenty-two sites covering the eastern, inner and western Gulf of Thailand as well as the Andaman Sea during 2010–2015. A total of nine coral diseases and signs of compromised health are observed in the waters of Thailand, consisting of pigmentation responses(pink lines, pink patches,pink spots and pink borers), white syndromes(white patches, white bands and ulcerative white spots), growth anomalies, and unusual bleaching patterns. The highest severity of all observed coral diseases and signs of compromised health are found at Ko Khang Khao in the inner Gulf of Thailand, while that observed in the Andaman Sea is relatively low. Composition of the diseases vary across the study sites. Four groups of study sites,in which there is an 80% similarity of diseases or signs of compromised health composition, are clustered and detected based on the Bray-Curtis similarity. The canonical analysis of principal coordinates reveal that most study sites in the Gulf of Thailand, especially the inner Gulf of Thailand, tend to show a high severity of the diseases. The association of disease severity and composition and the level of human impact are also *** study sites located near the shores and/or the areas with intensive tourism tend to have higher human impact, especially on poor water quality, which may be linked to the higher severity and composition of coral diseases and signs of compromised health in the Gulf of Thailand. Fish bites are also observed in many study *** severity of fish bites in the Gulf of Thailand is much lower compared to the Andaman Sea. Ko Rawi exhibits the highest severity, following by Ko Surin Nua and Ko Butang. The study sites within marine national park boundaries have a significantly higher severity of fish bites than those outside of the marine national park boundaries. This

关键词： coral diseases fish bites massive porites management Gulf of Thailand Andaman Sea

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The high-resolution climate recorded in the δ^(18)O of porites lutea from the Nansha Islands of China

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Chinese Science Bulletin 2001年第24期46卷 2097-2102页

作者： YU Kefu, CHEN Tegu, HUANG Dingcheng, ZHAO Huanting, ZHONG Jinliang & LIU Dongsheng (LIU Tungsheng)South China Sea Institute of Oceanoiogy, Chinese Academy of Sciences. Guangzhou 510301, China:Geology and Geophysics Institute. Chinese Academy of Sciences, Beijing 100029, China South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou China Geology and Geophysics Institute Chinese Academy of Sciences Beijing China

A porites lutea core from Yongshu Reef of Nansha Islands covering 50 years growth history was ana-ly/ed for oxygen isotopic composition with monthly and seasonally resolution. The calibration of the δ18O with the instrumental temperature indicated that the coral δ18O is a good indicator for sea surface temperature (SST) and air temperature (t). It can be used to reconstruct the SST and air temperature of the Yongshu Reef sea area. In addition, the coral δ18O provides signatures for the intensity of the East Asia monsoon and it is a record for the activities of El Nino events. With the calibrated SST and air temperature formulas, the most recent fifty years SST and air temperature were reconstructed based on the coral δ18O, thus back up the understanding of the climate of Nansha Islands to 1950. far beyond the limit of the instrumental recording since September 1988. It was found that, in general, increasing 1℃ air temperature results in 0.24‰decrease in skeletal δ18O.

关键词： Nansha Islands porites lutea δ18O sea surface tem-perature East Asia monsoon.

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High resolution porites Mg/Ca thermometer for the north of the South China Sea

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Chinese Science Bulletin 1999年第3期44卷 273-276页

作者： Gangjian Wei Xianhua Li Baofu Nie Min Sun Haichen Liu Chinese Acad Sci Guangzhou Inst Geochem Canton 510640 Peoples R China Chinese Acad Sci S China Sea Inst Oceanol Guangzhou 510310 Peoples R China Univ Hong Kong Dept Earth Sci Hong Kong Peoples R China

High resolution Mg/Ca ratios in the skeleton of a porites lutea from the coastal area in the North of the South China Sea were precisely analyzed by ICP-MS. Compared with the instrument measured SST records, the Mg/Ca ratios strongly correlate with the SSTs, even in time of 1982/83 EI N(?)io. Therefore, a coral Mg/Ca thermometer for the North of the South China Sea was *** on ICP-MS technique it can report sea surface temperatures to an accuracy of±0.5℃.

关键词： porites lutea Mg/Ca thermometer North of the South China Sea.

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Skeletal extension rate of the reef building coral <i>porites</i>species from Aqaba and their environmental variables

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Natural Science 2012年第9期4卷 731-739页

作者： Saber Al-Rousan The University of Jordan Marine Science Station P.O. Box 195 Aqaba 77110 Jordan

Annual skeletal extension rates of the sclera-actinian corals porites species were investigated in 32 colonies from the northern Gulf of Aqaba fringing reef at various depths (1 - 42 m). All corals reveal clear and regular skeletal density banding patterns. Results showed that the high-density annual growth bands were formed during winter and the low-density annual growth bands during summer. The mean annual extension rates of the studied corals reveal a large inter-colony variability with values ranged between 2.36 to 20.0 mm/year. While a general trend of decreasing coral extension rate with depth was observed and best explained by a simple exponential model, the rates clustered into two groups: 10.86 ± 2.54 mm/year in water depths less than 10 m, and 5.23 ± 1.99 mm/year below 12 m. Light intensity seems to be the primary environmental factor responsible for decreasing coral extension rate with depth since the effect of other environmental parameters could be neglected from the Gulf of Aqaba. Time series record of the mean annual coral extension rate showed a slight increasing linear trend which could be linked to increase seawater temperature over the period of time represented.

关键词： Coral Growth porites Skeletal Extension Rate Gulf of Aqaba Red Sea

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Coral Ba/Ca and Mn/Ca Ratios as Proxies of Precipitation and Terrestrial Input at the Eastern Offshore Area of Hainan Island

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Journal of Ocean University of China 2017年第6期16卷 1072-1080页

作者： JIANG Qiaowen CAO Zhimin WANG Daoru LI Yuanchao WU Zhongjie NI Jianyu School of Marine Geosciences Ocean University of China Qingdao 266100 P. R. China Second Institute of Oceanography State Ocean Administration Hangzhou 310012 P. R. China Hainan Academy of Ocean and Fisheries Sciences Haikou 570125 P. R. China

Geochemical ratios in coral reef skeletons could be used as proxies to reconstruct past climatological and environmental records in data-poor regions. Using a 103-year data set(1902 to 2005), the annual variations in Ba/Ca and Mn/Ca ratios of porites lutea skeletons at an eastern offshore area of Hainan Island(19?12'28.4''N, 110?37'38.8''E) were analyzed using inductively coupled plasma-optic emission spectrometry(ICP-OES). The analysis results showed that Ba/Ca ratios varied from a minimum of 3.120 μmol mol^(-1) in 1903 to a maximum of 10.064 μmol mol^(-1) in 1944, with an average of 5.256 μmol mol^(-1). Mn/Ca ratios varied from 0.206 to 5.708 μmol mol^(-1) with an annual average of 1.234 μmol mol^(-1), with peak values in 2001, 1964 and 1932, that correlated with strong rainfall events caused by typhoons. Variation in Ba/Ca and Mn/Ca ratios were compared with available river discharge and precipitation records, providing insight into past climatological events. Human activities and their indirect effects could impact the strength of the relationship between Ba/Ca and Mn/Ca ratios and observed precipitation and terrestrial input in the future.

关键词： porites lutea eastern offshore area of Hainan Island Ba/Ca and Mn/Ca ratios terrigenous input precipitation climate proxy records

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地质样品Sr同位素激光原位等离子体质谱(LA-MC-ICP-MS)测定

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岩石学报 2009年第12期25卷 3431-3441页

作者：杨岳衡吴福元谢烈文杨进辉张艳斌 Chinese Acad Sci Inst Geol & Geophys State Key Lab Lithospher Evolut Beijing 100029 Peoples R China

Sr同位素在研究岩浆演化及其源区具有重要的示踪作用。MC-ICP-MS的出现为具有高Sr含量地质样品的激光原位Sr同位素测定变成了现实。本文利用Netpune MC-ICP-MS和193nm准分子激光联机,通过滨珊瑚、斜长石、磷灰石和钙钛矿等系列实验,建... 详细信息

Sr同位素在研究岩浆演化及其源区具有重要的示踪作用。MC-ICP-MS的出现为具有高Sr含量地质样品的激光原位Sr同位素测定变成了现实。本文利用Netpune MC-ICP-MS和193nm准分子激光联机,通过滨珊瑚、斜长石、磷灰石和钙钛矿等系列实验,建立了激光原位Sr同位素测定方法。实验结果表明,激光Sr同位素测定中Kr、Rb和稀土元素二价离子的干扰能够有效扣除,而钙聚合物的干扰在Neptune型MC-ICP-MS并不显著。不同激光参数的实验表明,大激光束斑产生更高信号强度,因而Sr同位素精度更高,同一激光束斑大小,激光脉冲频率对Sr同位素精度无明显影响。

关键词：地质样品同位素测定激光原位等离子体质谱 natural isotopic measurement inductively coupled plasma analytical procedure spatial resolution mass spectrometry analysis in-situ porites coral excimer laser 实验激光束 significant development 准分子激光 spot size

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Coral Ba/Ca and Mn/Ca Ratios as Proxies of Precipitation and Terrestrial Input at the Eastern Offshore Area of Hainan Island

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中国海洋大学学报（英文版） 2017年第6期 1072-1080页

作者： JIANG Qiaowen CAO Zhimin WANG Daoru LI Yuanchao WU Zhongjie NI Jianyu School of Marine Geosciences Ocean University of China Hainan Academy of Ocean and Fisheries Sciences Second Institute of Oceanography State Ocean Administration

Geochemical ratios in coral reef skeletons could be used as proxies to reconstruct past climatological and environmental records in data-poor regions. Using a 103-year data set（1902 to 2005）, the annual variations in Ba/Ca and Mn/Ca ratios of porites lutea skeletons at an eastern offshore area of Hainan Island（19?12’28.4’’N, 110?37’38.8’’E） were analyzed using inductively coupled plasma-optic emission spectrometry（ICP-OES）. The analysis results showed that Ba/Ca ratios varied from a minimum of 3.120 μmol mol-1 in 1903 to a maximum of 10.064 μmol mol-1 in 1944, with an average of 5.256 μmol mol-1. Mn/Ca ratios varied from 0.206 to 5.708 μmol mol-1 with an annual average of 1.234 μmol mol-1, with peak values in 2001, 1964 and 1932, that correlated with strong rainfall events caused by typhoons. Variation in Ba/Ca and Mn/Ca ratios were compared with available river discharge and precipitation records, providing insight into past climatological events. Human activities and their indirect effects could impact the strength of the relationship between Ba/Ca and Mn/Ca ratios and observed precipitation and terrestrial input in the future.

关键词： porites lutea eastern offshore area of Hainan Island Ba/Ca and Mn/Ca ratios TERRIGENOUS INPUT PRECIPITATION climate proxy records

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