[BPT04-03] Effects of larger benthic foraminifers from global warming analysed by Micro-X-ray CT
Keywords:larger benthic foraminifer, micro CT, foraminiferal shell, laboratory experiments, global warming
In this study, we cultured asexually reproduced individuals of Sorites orbiculus under six different temperature conditions to examine the effects of SST on calcium carbonate producing of LBF. Experimental results with 12 weeks culturing indicated that increasing rates of shell weight, shell volume and the number of chambers added were generally increase with temperature increasing from 19 °C to 27 °C. On the other hand, calculated shell density is in constant in whole range of experiment temperature. Due to these results, it was suggested that shell weight was most closely dependent upon their shell volume. Their increasing rates of shell weight and shell volume were reversed their trends and decreasing at 29 °C, despite their growth rate of number of chambers added was still in constant from 27 °C to 29 °C. Therefore, the optimum temperatures for their chamber growth rate and calcification rate might be showed some deviation. This deviation might be caused by deviation of optimum temperatures of LBF and their photosynthesis symbionts. Finally, in future predicted global warming will be disturbed LBF calcification.