Study on carbon sinks by classified biofloc phytoplankton from marine shrimp pond water

Abstract

Study on the carbon sink by biofloc phytoplankton from species Oocystis sp. (Chlorophyta) and Chroococcus sp. (Cyanophyta) was done from the study area of marine shrimp farm i- sharp Setiu, Terengganu. Three month of database for carbon sinks was collected from the selected phytoplankton in the pond. The biovolume of the phytoplankton was calculated using simple geometrical formula and carbon conversion factor to convert the biovolume of each class of phytoplankton to carbon sink amount of value. Overall, Chroococcus sp. was identified as the most abundance species found in the pond where it can sequestrate 14923.39 μ g C L-1 amount of carbon dioxide (CO2) as compared to the amount of carbon can be sequestrated by Oocystis sp. which is around 3778.20 μ g C L-1. It also can be claimed that Chroococcus sp. was more carbon dense compared to Oocystis sp. because of its bigger cell volume. It can be assumed that biofloc phytoplankton was successful in carbon sequestration and contributed as small part of carbon sinker in the world due to its ability to sequester CO2 and high abundances in number found in the pond make its more efficient in sinking carbon dioxide.