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:: دوره 14، شماره 1 - ( 1393 ) ::
جلد 14 شماره 1 صفحات 136-149 برگشت به فهرست نسخه ها
Seasonal variability of size-classes of phytoplankton biomass in a sub-tropical embayment, Muscat, Sea of Oman
چکیده:   (5600 مشاهده)
The contribution of three different cell size classes of picoplankton: 0.74-2 μm, nanoplankton:2–20 μm and microplankton, >20 μm of the phytoplankton population and their relationship to environmental conditions were studied over two annual cycles at one station in Bandar Khyran Bay, Sea of Oman, from May 2006 to August 2008. Nanoplankton was the most important class contributing 54.4% to total Chl a (range 6-82%). Its seasonal highest concentrations was during the cold periods when temperature ranged from 28-29 °C in fall and near 24 C in winter when the supply of nutrients was sufficient to sustain their growth. Picoplankton had the second level of the contribution, comprising (23.5%, range 4-74 %) of the total Chl a. and their concentration was generally constant (0.04-.06 μg l–1) throughout the study period. The drop of picoplankton population coincided with an increase in the microplankton and nanoplankton populations indicating a high grazing pressure exerted on the picoplankton population. Microplankton size-class occupied the third level of the contribution comprising (22.2%, range 3-65 %). Their general concentration was below 0.1 μg l–1 and only dominant when temperatures were lowest and nitrate, nitrite, silicate and phosphate concentrations were the highest. The temporal variability observed was associated with changes in the nanaoplankton indicating that in some cases, it is the small fraction of phytoplankton that drives changes in abundances and productivity.
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نوع مطالعه: پژوهشي | موضوع مقاله: Ecology
دریافت: 1394/1/26 | پذیرش: 1394/1/26 | انتشار: 1394/1/26
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Al-Hashmi K, Claereboudt M, Piontkovski S, Al Azri A, Amin S. Seasonal variability of size-classes of phytoplankton biomass in a sub-tropical embayment, Muscat, Sea of Oman. IJFS. 2015; 14 (1) :136-149
URL: http://jifro.ir/article-1-1829-fa.html

Seasonal variability of size-classes of phytoplankton biomass in a sub-tropical embayment, Muscat, Sea of Oman. مجله علوم شیلاتی ایران. 1393; 14 (1) :136-149

URL: http://jifro.ir/article-1-1829-fa.html



دوره 14، شماره 1 - ( 1393 ) برگشت به فهرست نسخه ها
Iranian Journal of Fisheries Sciences Iranian Journal of Fisheries Sciences
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