Growth characteristics and growth rate estimation of Japanese precious corals
Growth characteristics and growth rate estimation of Japanese precious corals
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DOI：
10.1016/j.jembe.2013.01.012
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发表时间：
2013-03-01
影响因子：
2
通讯作者：
Hasegawa, Hiroshi
中科院分区：
文献类型：
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作者：
Nguyen Trong Luan;Rahman, M. Azizur;Hasegawa, Hiroshi
岩相学方法一直是一种流行的技术，用于根据珊瑚轴骨架中的生长环密度估计珊瑚的年龄和生长速度。有机基质染色（OMS）方法，一种改进的岩相学方法，也被用来测量年龄和生长速度的地中海红珊瑚（Corallium rubrum）的方解石骨架中的有机基质（OM）染色。由于有机物质分析法是根据珊瑚骨骼内有机物质的浓度而定，因此此方法未必适用于有机物质含量低的珊瑚品种。本文根据岩相学原理，采用VHX-1000数字显微镜（以下简称VIX-1000），在不对轴骨OM染色的情况下，测定了三种日本珍贵珊瑚（Paracorallium japonicum，Corallium elatius和Corallium konojoi）的生长特征和生长速率。与OM染色的横截面（平板）相比，日本红珊瑚（P. japonicum）未染色平板中的生长环在VHX-1000下更清晰可见。这可能是由于珊瑚骨骼中有机质的浓度较低。初级珊瑚的生长速度因珊瑚种类、生境和环境条件而有很大差异。日本红珊瑚的直径和线性生长率（P. japonicum）的生长速度较慢（分别为0.20 +/- 0.08-027 +/- 0.01和2.22 +/- 0.82-6.66 +/- 5.52 mm yr（-1））（C elatius;分别为0.30 +/- 0.04和2.76 +/- 2.09毫米yr（-1））和白色（C konojoi;分别为0.44 +/- 0.04和7.60 +/- 0.75毫米yr（-1））珊瑚。此外，日本红珊瑚的直径增长率（0.24 +/- 0.05-0.44 +/- 0.04毫米/年-1）比地中海红珊瑚（C rubrum; 0.20-0.62 +/- 0.19毫米/年-1）慢。(C)2013 Elsevier B. V.保留所有权利。
The petrographic method has been a popular technique for estimating the ages and growth rates of corals based on growth ring density in their axial skeleton. The organic matrix staining (OMS) method, a modified method of petrographic method, has also been used for measuring age and growth rate of the Mediterranean red coral (Corallium rubrum) by staining the organic matrix (OM) in the calcite skeleton. Since the OMS method is based on the concentration of OM in the coral skeleton, this method may not be suitable for coral species with low OM content. In the presnt study, growth characteristics and growth rates of three Japanese precious corals (JPCs; Paracorallium japonicum, Corallium elatius and Corallium konojoi) were determined based on the principles of the petrographic method using a high resolution VHX-1000 digital microscope, termed as VIX-1000 hereafter, without staining the OM in the axial skeleton. Compared to the OM-stained cross-sections (slabs), growth rings in un-stained slabs of the Japanese red coral (P. japonicum) were more clearly visible with the VHX-1000. This may be due to low concentration of OM in the coral skeleton. Growth rate of JPCs differ significantly depending on coral species, habitat, and environmental conditions. Diametric and linear growth rates of the Japanese red coral (P. japonicum) were slower (0.20 +/- 0.08-027 +/- 0.01 and 2.22 +/- 0.82-6.66 +/- 5.52 mm yr(-1), respectively) than the Japanese pink (C elatius; 0.30 +/- 0.04 and 2.76 +/- 2.09 mm yr(-1), respectively) and white (C konojoi; 0.44 +/- 0.04 and 7.60 +/- 0.75 mm yr(-1), respectively) corals. In addition, the diametric growth rate of the Japanese red coral (P. japonicum) is slower (0.24 +/- 0.05-0.44 +/- 0.04 mm yr(-1)) than the Mediterranean red coral (C rubrum; 0.20-0.62 +/- 0.19 mm yr(-1)). (C) 2013 Elsevier B.V. All rights reserved.