Once again we have a look at the activities of our young marine scientists. As their internships wind to a close most have volunteered to stay on at the Andaman through the busy Christmas/ New Year period.
They will continue to be hosted by the Andaman Resort and their allowances and research materials costs will come from the generous donation of Thomson Reuters.
The annual-bands of coral core are the bands or “rings” that formed on the skeletal structure which is similar to the trunks of tree. The bands represent the different year and the skeletal structure also exhibit a regular periodic variation in bulk density reflecting seasonality. The annual-band of the coral skeleton shows the historical record in the different environmental condition. Most of the element and compound that expose to the coral will trap within the aragonite during deposition and this condition will capture a record (Readman et al., 1996).
This study aims to know the growth rate of the massive coral (Eg: Porites, Favia, Goniopora) at Datai bay by using UV light for chronological banding patter that have inside the coral skeleton . The alternating density (high density and low density) represent a year of the coral growth .
The massive coral species around the bay are survey first. Then, the selected massive coral will be cut using metal saw, where the slice/cutting is perpendicular to the main vertical growth axis of the colony. Then, the coral skeleton will let to dry and linear extension analysis will be carried out.
The linear extension method is to identify the year bands or the growth rate of the coral. The coral core will be observed under UV light lamp in a dark box to observe the dark and light bands (the chronological banding pattern). The wavelength of the UV light is 254 nm. When the bands are revealed, the growth rate of the coral will be calculated for Linear Extension Rate. The linear extension rate will be calculated by using a ruler with 0.1 cm accuracy for each year.