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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Seasonal Relationships between the Plankton Community and Hydrographic Conditions in a Shallow Oligotrophic Bay, Gulf of Thailand) ผู้เขียน: ไพลิน จิตรชุ่ม,  นางลัดดา วงศ์รัตน์, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf Abstract The variability in a plankton community was studied twice a week from September 2006 to August 2007 in a shallow bay (Manao Bay, Gulf of Thailand). Phytoplankton was collected by filtering with a 20 ?m plankton net and zooplankton was collected by vertical hauling with a plankton net of 200 ?m mesh size. Hydrographic conditions were measured in situ, while water samples were analyzed for nutrient content in the laboratory. Fifty-six genera of phytoplankton and 37 groups of zooplankton were recorded. The mean abundance of phytoplankton was 4,930 ? 2,801 unit l -1 while that of zooplankton was 3,380 ? 1,264 individuals m-3 (ind. m-3). The dominant groups of phytoplankton were centric diatoms and pennate diatoms, while copepods and meroplankton were the major contributors of zooplankton. The plankton community did not differ in species composition and abundance between the two monsoon seasons and there were no specific noticeable characteristics. Hydrographic conditions showed slight fluctuations and nutrients had low values. Additionally, low average primary production (1.30 ? 0.67 mg m-3) was influenced by water temperature, rainfall, salinity, silicate content and dissolved inorganic nitrogen. This bay was characterized as a tropical oligotrophic coastal water. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Biodiversity of Plankton Communities in Inland Waters along the Tenasserim Range, Southern Thailand) ผู้เขียน:ดร.ไพลิน จิตรชุ่ม, ผู้ช่วยศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractFreshwater plankton diversity and environmental parameters were investigated along the Tenasserim Range in May 2007 and 2008. This area is recognized as the backbone of Thailand because it extends from the northern to the southern border of Thailand and Myanmar. Twenty-nine sampling stations were established in 14 inland waters, which were composed of 8 rivers, 5 reservoirs and 1 wetland in Phet Buri, Prachuap Khiri Khan and Chumphon provinces. The plankton samples were collected using a filtering technique and a 20 ?m plankton mesh net. In total, 161 species of phytoplankton, 84 species of zooplankton and 4 larval stages were found. The dominant phytoplankton species, measured in terms of the frequency of occurrence, were: Oscillatoria sp., Synedra ulna, Eudorina elegans, Aulacoseira granulata, Gyrosigma spencerii, Navicula sp. and Peridiopsis sp. Moreover, three species of zooplankton (Difflugia lebes, Polyarthra sp. and Arcella vulgaris) and two larval stages (copepod nauplius and copepodid larvae) were abundant in this study. The results revealed the specific species composition of the plankton communities between the river and reservoir ecosystems and indicated that these communities could potentially provide support for pelagic production. Further investigation of the annual cycle of the plankton community is required for the development of a biodiversity conservation plan in the future. |
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 Researcherนาย อลงกต อินทรชาติที่ทำงาน:สถานีวิจัยประมงศรีราชา (ศูนย์บริหารงานวิจัยเเละสนับสนุนวิชาการ คณะประมง) คณะประมง สาขาที่สนใจ:สมุทรศาสตร์และสิ่งแวดล้อม, การเพาะเลี้ยงสัตว์น้ำชายฝั่ง, งานวิเคราะห์ทางด้านคุณภาพน้ำและดินตะกอน, งานวิเคราะห์สัตว์หน้าดิน Resume |
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