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Journal : Atom Indonesia Journal

The Measurements of Calcification Rates in Reef Corals Using Radioisotope 45Ca at Pongok Sea, South Bangka G. Diansyah; TZ. Ulqodry; M. Rasyid; A. Djawanas
Atom Indonesia Vol 37, No 1 (2011): April 2011
Publisher : PPIKSN-BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/aij.2011.70

Abstract

Coral reef ecosystem is one of the most important ecological systems in the Indonesian coastal zone. The aim of this study which was undertaken between August - October 2006, is to measure the calcification of corals in a reef coral in the Pongok Sea, South Bangka using 45Ca. The steps in conducting this study were surveying of the site, preparation, transplanting, incubation in the 45Ca - solution, and analysis of the coral fragments. The results showed that at the depth of 5 m different counts per minute (cpm) trend occurred. For the samples taken from the transplantation of the Artificial Colony (Ac) the cpm showed that with the progress of time the cpm declined, reaching its lowest cpm at 5 hours after retransplanting of the coral fragments. On the other hand the samples obtained from the natural (Nc) colony showed that the cpm increased with time progress. At the 10 m depth where only the coral fragment of the natural colony (Nc) was observed a different pattern showed up. Here with the progress of time up to 3 hours the cpm increased and after that it declined to reach a low cpm at 5 hours of observation. The cpm values were then transformed to disintegrations per minute (dpm), μCi and at the end to 45Ca content. The same trend is shown for dpm, μCi/0.5 g sample and μg Ca/0.5 g sample. The 45Ca content (μg/0.5g sample) were used to show the calcification rates of coral fragments. It showed clearly that 45Ca could be used to calculate the magnitude of calcification. Received: 08 December 2009; Revised: 05 April 2011; Accepted: 05 April 2011
Co-Authors ., Prianto A. Djawanas Afan Absori Afan Absori Andi Agussalim, Andi Andreas Eko Aprianto Ania Citraresmin Ania Citraresmin Anugerah, Nanda Rizky Apri Suganda Apriyanto, Apriyanto Arsyana, Nola Fiqrya Arsyei, Laksamana Fachryzal Aryawati , Riris Balqis, Finanda Rahil Barus, Beta Susanto Berliana Iksy Della Che Abd Rahim Mohamed De Karo, Fransiskus Dietriech Geoffrey Bengen Fadel, Ahmad Al Fauziyah Fauziyah Fauziyah Fauziyah Fauziyah Fitri Agustriani G. Diansyah Gusti Diansyah Gusti Diansyah Hartoni Hermialingga, Septi Heron Surbakti Herry Purnomo Hilmaturosyidah, Hilmaturosyidah Inda Azhara Indica, Mangifera Isnaini Isnaini . Isnaini Isnaini Lestari, Ning Intan Lidya Grace M. Rasyid M. Yogi Riyantama Isjoni Mardasin, Wahyudi Mawarda . Meiriyani, Fitri Melki Melki Melki Melki Mohamed, Che Abd Rahim Muhammad Didi Tantria Muhammad Hendri Muhammad Hendri Muhammad Syahdan Muhtadi Muhtadi Muhtadi Muhtadi Muhtadi Mulyadi Mulyadi Nadila Nur Khotimah Netty Kurniawaty Ningsih, Ellis Nurjuliasti Novitasari, Tri Ayu Okarda, Beni Purwiyanto, Ana Ida Sunaryo Puspa Ayu Pitayati Puspa Deka Sari Raihan, Muhammad Ramadoni, Ramadoni Redho Yoga Nugroho Redho Yoga Nugroho Renaldi . Rezi Apri Rezi Apri Richardus F Kaswadji Rinto Rinto Riris Aryawati Riris Aryawaty Rozirwan . Rujito Agus Suwignyo Sabri Sudirman Santoso Santoso Sarno . Sarno Sarno Septi Hermialingga Siddik, Judistira Siswahyudianto Susanti, Ester Mei Syamsiar, Syamsiar Wahyuni, Ratih Dwi Wike Ayu Eka Putri Winarta, Yoga Yulianto Suteja Yulisman Yulisman Zulkifli Dahlan