Abundance and diversity of benthic dinoflagellates on different substrates in Banggi Island

Tan, Chun Wei (2008) Abundance and diversity of benthic dinoflagellates on different substrates in Banggi Island. Universiti Malaysia Sabah. (Unpublished)


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Study of marine benthic dinoflagellates on several substrates (Padina sp., Sargassum sp., seagrass and sand) was done in Banggi Island. Samplings were done at 3 sampling station (Serunding, Balak-balak and Matiangin). Species identification was done based on previous literature (Mohammad-Noor et al., 2007) and cells abundance was numerated with Sedwick Rafter counting chamber under inverted microscope. Nineteen species from 5 orders of benthic dinoflagellates (Prorocentrales, Dinophysiales, Gonyaulacales, Gymnodiniales, and Peridiniales) have been identified. Nine of these benthic dinoflagellates species are potentially to produce phycotoxin. The species were Prorocentrum arenarium, P. concavum, P. laustjae, P. lima, Gambierdiscus sp., Coolia sp., Ostreopsis labem, Ostreopsis lenticularis, and Ostreopsis ovala. Prorocentrum lima was a common species with cells abundance (8367 ± 1566 cells/g wet weight) at all sampling stations and substrates. The highest cell abundance of benthic species was found in seagrasses (27.248 ± 12.703.4 cells/g wet weight) compared with other substrates. Based on the orders of benthic dinoflagellates, none of these showed any preference to a specific substrate (p>O0.05). The preference to the host was not consistent throughout the study. This may suggest that the abundance of benthic dinoflagellates depends on dominant substrate in the particular area. The highest cell abundance of benthic dinoflagellates was found in station Maliangin and the lowest in station Balak-balak. The differences in species abundance at different locations may be due to the geographical differences or other physic-chemical limitation (e.g. nutrient level, temperature or even salinity). Morphology and nutritional value of the seagrass may be one of the main focuses in future research in determining the important relationship between seagrass and benthic species. Information gained from this study will contribute to the knowledge of benthic dinoflagellates for others scientific research in future and to support Harmful Algae Bloom (HAB) study in Malaysian waters.

Item Type: Academic Exercise
Keyword: marine benthic dinoflagellates, cell abundance, benthic species, dominant substrate
Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling
Department: SCHOOL > School of Science and Technology
Depositing User: ADMIN ADMIN
Date Deposited: 14 Jul 2016 10:51
Last Modified: 20 Nov 2017 11:36
URI: https://eprints.ums.edu.my/id/eprint/13603

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