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Sains Malaysiana 45(4)(2016): 595–599 Comparison on the Cell
Abundance of Benthic Dinoflagellates in Macrophytes and Water
Column Collected from Open Coastal Waters and Semi-Enclosed Lagoon (Perbandingan Kelimpahan
Sel Dinoflagelat Bentos pada Makrofit dan Turus Air yang Diambil
dari Pesisir Terbuka dan Teluk Semi Tertutup) NORMAWATY
MOHAMMAD-NOOR1*,
ASILAH
AL-HAS2,
SHAHBUDIN
SAAD1 & THAN AUNG2 1Department
of Marine Science, Kulliyyah of Science, International Islamic
University Malaysia Jalan
Sultan Ahmad Shah, Bandar Indera Mahkota, 25200 Kuantan, Pahang
Darul Makmur, Malaysia 2Borneo
Marine Research Institute, Universiti Malaysia Sabah, Jalan UMS,
88400 Kota Kinabalu, Sabah, Malaysia Diserahkan:
30 Disember 2014/Diterima: 2 November 2015 ABSTRACT Benthic dinoflagellates
are known to occur in the water column. The reason they can be
found in different parts of the ecosystem is not clear. This study
aims to determine the species and the cell abundance of benthic
dinoflagellates in the water column and macrophytes collected
from two different locations i.e. semi-enclosed lagoon and open
coastal waters. The physico-chemical parameters (temperature,
salinity, pH, dissolved oxygen) and nutrients (nitrate and phosphate)
were determined. Results showed that in the lagoon, the most abundant
dinoflagellate species on the macrophytes was also the most abundant
dinoflagellate species in the water column. The species that dominated
the water column and marophytes in the lagoon was Bysmatrum
caponii. In the coastal area the trend was not clear. Coolia
dominated the macrophytes whereas Peridinium quinquecorne
dominated the water column. The physico-chemical parameters
determined were similar at both sites except for nutrients. Results
show that type of substrates and different geomorphology effects
benthic dinoflagellates cell abundance in the macrophytes and
water column. Keywords: Benthic dinoflagellates;
hydrodynamic; planktonic; seaweed; water column ABSTRAK Kehadiran dinoflagelat
bentos di dalam turus air sememangnya diketahui. Sebab kehadiran
organisma ini di dalam bahagian ekosistem yang berbeza tidak diketahui.
Tujuan kajian ini ialah untuk mengenal pasti spesies dan kelimpahan
sel dinoflagelat bentos di dalam turus air dan makrofit di dua
lokasi berbeza iaitu di teluk separa tertutup dan di kawasan pesisir
yang terbuka. Parameter fizikal-kimia (suhu, kemasinan, pH, oksigen
terlarut) dan nutrien (nitrat dan fosfat) ditentukan. Keputusan
menunjukkan di teluk, spesies yang banyak ditemui pada makrofit
juga dijumpai banyak di dalam turus air. Spesies yang mendominasi
makrofit dan turus air di teluk ialah Bysmatrum caponii. Namun,
di kawasan pesisir, trendnya tidak jelas. Coolia didapati
mendominasi makrofit tetapi Peridinium quinquecorne mendominasi
turus air. Bacaan parameter fiziko-kimia di kedua-dua kawasan
adalah sama kecuali nutrien. Keputusan menunjukkan bahawa jenis
subtrak dan geomofologi yang berbeza mempengaruhi kelimpahan spesies
yang hadir dalam makrofit dan turus air. Kata kunci: Dinoflagelat bentos; hidrodinamik; planktonik; rumpair
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Aquatic Microbial Ecology 26: 51-60. *Pengarang untuk surat-menyurat;
email: normahwaty@iium.edu.my
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