Effects of environmental conditions and nutrients on the occurrence and distribution of potential harmful phytoplankton in mesotrophic water
Marudu Bay, north coast of Sabah is characterized with mesotrophic water body and typical environmental parameters throughout the year. The current study was undertaken to evaluate the effect of environmental parameters and nutrients in mesotrophic water on the occurrence and distribution of poten...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English English |
| Published: |
Universiti Kebangsaan Malaysia
2016
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| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/19456/1/Effects%20of%20environmental%20conditions%20and%20nutrients%20on%20the%20occurrence%20and%20distribution.pdf https://eprints.ums.edu.my/id/eprint/19456/7/Effects%20of%20Environmental%20Conditions%20and%20Nutrients%20on%20the%20Occurrence%20and.pdf https://eprints.ums.edu.my/id/eprint/19456/ http://www.ukm.my/jsm/pdf_files/SM-PDF-45-6-2016/03%20Tan%20Kar%20Soon.pdf |
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| Summary: | Marudu Bay, north coast of Sabah is characterized with mesotrophic water body and typical environmental parameters
throughout the year. The current study was undertaken to evaluate the effect of environmental parameters and nutrients
in mesotrophic water on the occurrence and distribution of potentially harmful phytoplankton species. The samplings
were conducted over a period of thirteen months, covering southwest monsoon (SWM), inter-monsoon (IM), and northeast
monsoon (NEM), at ten stations throughout the bay. Physical parameters (temperature, salinity, pH, dissolved oxygen,
current speed and secchi depth), biological parameters (cell densities of phytoplankton) and chemical parameters
(phosphate, nitrate, silicate and ammonia) were examined. The results indicated at least eight potentially harmful
phytoplankton species (Dinophysis caudata, D. miles, Ceratium furca, C. fursus, Prorocentrum micans, P. sigmoides, P.
triestinum and Pseudo-nitzschia sp.) were detected in north coast of Sabah. However, the potentially harmful phytoplankton
species contributed only about 1.3% of the total phytoplankton community. Under nutrient deprivation conditions, the
potentially harmful phytoplankton species distribution was mainly influenced by the ability to utilize other nitrogen
sources, cell mobility and toleration to low nutrients environments. |
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