CAJ | 학술논문

根据2013年春季调查资料研究了南沙海域不同水团中网采浮游植物的群落特征。共鉴定网采浮游植物4门62属222种，其中硅藻门和甲藻门种类数分别占67.1%和31.1%。浮游植物平均丰度为（16655±36570）个· m-3，硅藻门平均丰度占93.6%。浮游植物多样性指数（ H′）和均匀度指数（ J′）平均分别为4.43和0.85。巴拉巴克海峡西侧混合水受苏禄海表层入侵水及冷涡影响，跃层浅，营养盐浓度高，浮游植物种类数和丰度均最高。巽他陆架北缘沿岸混合水受局部上升流的影响，浮游植物丰度次之。中南半岛沿岸混合水中无机氮（ DIN）浓度最低，浮游植物种类数和丰度均低，而固氮蓝藻的丰度比例却最高。南沙中央表层水受陆源物质影响小，跃层深且薄，75 m以浅水层硅酸盐浓度最低，浮游植物丰度较低，但甲藻门丰度比例最高， J′最高，浮游植物丰度最低值出现在暖涡区域。
근거2013년춘계조사자료연구료남사해역불동수단중망채부유식물적군락특정。공감정망채부유식물4문62속222충，기중규조문화갑조문충류수분별점67.1%화31.1%。부유식물평균봉도위（16655±36570）개· m-3，규조문평균봉도점93.6%。부유식물다양성지수（ H′）화균균도지수（ J′）평균분별위4.43화0.85。파랍파극해협서측혼합수수소록해표층입침수급랭와영향，약층천，영양염농도고，부유식물충류수화봉도균최고。손타륙가북연연안혼합수수국부상승류적영향，부유식물봉도차지。중남반도연안혼합수중무궤담（ DIN）농도최저，부유식물충류수화봉도균저，이고담람조적봉도비례각최고。남사중앙표층수수륙원물질영향소，약층심차박，75 m이천수층규산염농도최저，부유식물봉도교저，단갑조문봉도비례최고， J′최고，부유식물봉도최저치출현재난와구역。
Based on the samples collected in Nansha area in spring,2013,we investigated the net phytoplankton community in order to de-termine the effects of water masses on their distribution. A total of 222 species,belonging to 62 genera of 4 phyla,were identified. Bacillari-ophyta and Pyrrophyta accounted for 67. 1% and 31. 1% in species number,respectively. The average abundance of net phytoplankton was (16 655 ± 36 570)cell·m-3. Bacillariophyta accounted for 93. 6% in abundance. The average diversity index and evenness index of net phy-toplankton were 4. 43 and 0. 85. The species number and abundance of net phytoplankton were the highest in the mixed waters in the west of Balabac Strait,characterized by shallow thermocline and high nutrient concentrations resulting from the intrusion of Sulu Sea waters and the appearance of a clod eddy. In the mixed waters in the north edge of the Sunda Shelf,the abundance of net phytoplankton was sub-high due to the influence of upwelling. In the mixed waters from coast of the Indo-China Peninsula with low inorganic nitrogen,the species number and abundance of net phytoplankton were low,but the percentage of Cyanophyta increased to the maximum. In the Nansha central surface waters with less terrigenous matter,deep and thin thermocline,the lowest silicate concentration occurred at 0~75 m,the average abun-dance of net phytoplankton was low,but the percentage of Pyrrophyta increased to the maximum,and the average evenness index of net phy-toplankton was the highest,while the lowest abundance of net phytoplankton appeared in the warm eddies.