CAJ | 학술논문

于2012年8月至2013年1月在流沙湾海区进行了3个季度的浮游植物调查。共检出浮游植物80种，包括硅藻门34属69种，甲藻门5属9种，蓝藻门2属2种，主要优势种为中肋骨条藻（ Skeletonema costatum）、菱形海线藻（ Thalassionema nitzschioides）和中心圆筛藻（ Coscinodiscus centralis）等。浮游植物的细胞丰度为0.001×104~1.495×104个·L-1），夏季最高冬季最低且内港丰度普遍低于外港。扇贝主养区、网箱鱼类养殖区、珍珠贝养殖区的多样性指数普遍高于对照区（无养殖区），且网箱鱼类养殖区最高。夏、秋两季扇贝主养区丰度相对较高，网箱鱼类养殖区浮游植物细胞丰度则与对照区相近，珍珠贝养殖区丰度夏季较高（1.099×104个·L-1）而秋季较低（0.021×104个·L-1）。结果表明，近年来流沙湾海区浮游植物种类及丰度锐减；扇贝养殖可提高浮游植物丰度，鱼类网箱养殖则反之；密集的网箱设施阻碍了湾口水流交换，减少了营养物质的运输并限制了内港珍珠贝养殖区浮游植物丰度。
우2012년8월지2013년1월재류사만해구진행료3개계도적부유식물조사。공검출부유식물80충，포괄규조문34속69충，갑조문5속9충，람조문2속2충，주요우세충위중륵골조조（ Skeletonema costatum）、릉형해선조（ Thalassionema nitzschioides）화중심원사조（ Coscinodiscus centralis）등。부유식물적세포봉도위0.001×104~1.495×104개·L-1），하계최고동계최저차내항봉도보편저우외항。선패주양구、망상어류양식구、진주패양식구적다양성지수보편고우대조구（무양식구），차망상어류양식구최고。하、추량계선패주양구봉도상대교고，망상어류양식구부유식물세포봉도칙여대조구상근，진주패양식구봉도하계교고（1.099×104개·L-1）이추계교저（0.021×104개·L-1）。결과표명，근년래류사만해구부유식물충류급봉도예감；선패양식가제고부유식물봉도，어류망상양식칙반지；밀집적망상설시조애료만구수류교환，감소료영양물질적운수병한제료내항진주패양식구부유식물봉도。
We studied the characteristics of phytoplankton community in Liusha Bay for three quarters from August,2012 to January, 2013. A total of 80 phytoplankton species were recorded,with 69 species of diatom belonging to 34 genera,followed by dinoflagellates represented by 9 taxa(5 genera)and blue-green algaes by 2 taxa(2 genera). The most common dominant species were Skeletonema costatum,Thalassionema nitzschioides and Coscinodiscus centralis. The range of phytoplankton density was 0. 001 × 104 ~1. 495 × 104 cells·L-1 with maximum density in summer,followed by autumn and winter. In general,the phytoplankton density decreased from outer bay to inner bay. Compared with the control( non-cultured area),the diversity indices in the cultured areas were higher,espe-cially in the fish cultured area. In summer and autumn,phytoplankton density was higher in scallop culture area,while lower in fish cage and non-cultured area. However,phytoplankton density in pearl oyster cultured area was higher in summer( 1. 099 × 104 cells· L-1 )and low in autumn(0. 021 × 104 cells·L-1 ). The results indicate that both phytoplankton taxa and density declined steeply in re-cent years. The phytoplankton density increased and decreased by scallop culture and fish cage culture,respectively. Dense fish cages blocked the current exchange,diminishing the transportation of nutrients across the bay and the phytoplankton density in pearl oyster cultured area of Liusha Bay.