Phytoplankton and Bacterial Communities in South Harbour, Manila Bay, Philippines
Date
2018Author
Azanza, R. V
Austero, N.M.
Dungca, J.C.R.
Caspe, F.J.O.
Khandeparker, L.
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In line with the ASEAN-India project �Extent of Transfer of Alien Invasive Organisms in�South/Southeast Asia via Shipping�, phytoplankton and bacterial communities in the waters off�South Harbour, Manila Bay were investigated. Sampling was done in July and August 2012 and in�April and May 2013. A total of 67 phytoplankton species including 29 diatoms and 38 dinoflagellates�were identified. Potentially toxic Pseudo-nitzschia spp. were among the diatoms found as well as�dinoflagellates Alexandrium spp., and Gymnodinium spp. The diatom Skeletonema costatum�appeared to be the dominant species in July and August 2012, whereas Chaetoceros spp.�constituted over 85% of the total phytoplankton assemblage in April and May 2013. Mean bacterialabundance ranged from 9.53 x 102-3.18 x 105 cells/mL in July 2012. In addition, 93 bacterial isolates�were� identified using 16S rDNA, several of which belonged to the following phyla: Actinobacteria,�Bacteriodetes,� Firmicutes, and Proteobacteria; whereas, others were determined as uncultured�bacterial clones. These results will serve as a valuable baseline for future studies on phytoplankton�and bacterial community structure in Manila Bay
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