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Title:	Study on species diversity distribution and biomass of phytoplankton in Southern Caspian Sea
Authors:	Fatemeh Sadat Tahami (P37521)
Supervisor:	Mazlan Abd.Ghaffar, Prof. Dr.
Keywords:	Universiti Kebangsaan Malaysia -- Dissertations Dissertations, Academic -- Malaysia Freshwater phytoplankton -- Caspian Sea Phytoplankton -- Ecology Phytoplankton -- Caspian Sea
Issue Date:	28-Jun-2012
Description:	The hydrobiology of the Caspian Sea has been systematically studied since 1934 (The first all-Caspian expedition). After the Second World War, the Caspnirkh Institute in Russia initiated regular seasonal annual observation in Northern Caspian Sea and in the following years throughout the Caspian Sea (except in Iranian waters). In Iran studies developed using coastal transect designs since 1990s. The current study continues previous studies in Caspian Sea that took place on the invading zooplankton Mnemiopsis leidyi with emphasis on changes occurred on the phytoplankton assemblages. Water samples were collected from 6 transect lines of Lisar, Anzali, Sefidrood, Nooshahr, Babolsar, Amirabad with 4 stations (A, B, C, D) on each transect and different depths (0, 10, 20, 50, 100) meters in Southern of Caspian Sea. Further laboratory analysis was carried out at the Caspian Sea Ecological Institute. Results of the present study showed that phytoplankton of Southern Caspian Sea include 193 species from 5 phyla, including 92 species of Chrysophyta, 45 Cyanophyta, 23 Pyrrophyta, 21 Chlorophyta and 12 Euglenophyta. Comparison of phytoplankton before and after M. leidyi invasion of Caspian Sea showed that phytoplankton species have increased over time. During 1995-1996 the maximum phytoplankton abundance and biomass were at 5 m (3519513 ± 8728932 N.m-3) and (97 ± 355 mg.m-3) respectively and during 2006-2007 were at surface (6570245 ±18287461 N.m-3) and (22 ± 78 mg.m-3) respectively that belonging to Chrysophyte. Although the abundance of Chrysophyta increased, but in terms of biomass, Chrysophyta showed a sharp decrease. This is because member of Chrysophyta was dominated by smaller species such as Nitzschia seriata (an aggressor species). The Pyrrophyta and Cyanophyta abundance and biomass decreased sharply. On the other hand, abundance of Chlorophyta increased. It is most likely that a sharp decrease in zooplankton predation due to their decrease in numbers as mentioned by previous workers (as a result of M. leidyi predation) that caused an overall increase in phytoplankton of southern Caspian Sea after invasion by the comb jelly (M. leidyi). There were large ranges of population variation in different layers due to the highest number of phytoplankton abundance was recorded in surface. In this study Chrysophyta, Pyrrophyta and Cyanophyta are the most abundant classes of marine phytoplankton in all the depth (0, 10, 20, 50 and 100) meter. It seems that the changes in the development of phytoplankton in the Southern Caspian Sea are naturally related to the amount of nutrients, zooplanktons, larvae, Mnemiopsis leidyi, mixing waters and must of abundance and biomass of phytoplankton found up to 50 meter.,Certification of Master's / Doctoral Thesis" is not available
Pages:	296
Call Number:	QK933.T334 2012 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Faculty of Science and Technology / Fakulti Sains dan Teknologi

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