| 摘要: |
| 为研究抚宁海湾扇贝养殖区浮游植物变化特征,探讨水质因子对浮游植物的影响,2020年5月—11月,每月测定该海域的主要水质因子,统计浮游植物。结果表明:共鉴定浮游植物69种,优势种33种;浮游植物密度(8.3~267.9)×104cell/L,5月份最高;生物多样性指数为0.458~3.747,均匀度指数0.099~0.796,丰富度指数0.933~4.755。海水水温范围11.8~26.8℃,盐度28.8~34.0,活性硅酸盐(SiO32–-Si)含量0.025~0.627mg/L,硝酸盐氮(NO3–-N)浓度0.057~0.284mg/L,均呈“上升-下降”趋势;pH范围为7.867~8.190,化学需氧量(COD)为0.260~1.415mg/L,活性磷酸盐(PO43–-P)0.003~0.006mg/L,变化趋势为“下降—上升”;对优势种与水质因子的分析表明,影响该海域浮游植物变化的主要环境因子为活性硅酸盐、盐度、活性磷酸盐和硝酸盐氮;裸藻门与活性磷酸盐、盐度呈正相关,与活性硅酸盐、硝酸盐氮呈负相关;甲藻门与活性硅酸盐呈正相关,与活性磷酸盐、硝酸盐氮呈负相关;隐藻门与活性硅酸盐、盐度成正相关,与硝酸盐氮呈负相关。 |
| 关键词: 海湾扇贝养殖区 营养盐 浮游植物 冗余分析 |
| DOI：10.11759/hykx20210926002 |
| 分类号: |
| 基金项目:国家重点研发计划(2018YFD0901404);天津市海水养殖产业技术体系创新团队(ITTMRS2021003);现代农业产业技术体系建设专项资金(CARS49);天津市科技计划项目(21ZYCGSN00350) |
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| Relationship between phytoplankton and water quality factors in the Argopecten irradians culture area of Funing Bay, Hebei |
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BU Shi-xun1, ZHANG Fu-chong2, FANG Xiao2, LI Yong-ren1
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1.Tianjin Key Laboratory of Aqua-Ecology and Aquaculture, College of Fisheries, Tianjin Agricultural University, Tianjin 300384, China;2.Hebei Ocean and Fisheries Science Research Institute, Qinhuangdao 066000, China
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| Abstract: |
| To study the change in the characteristics of phytoplankton in the scallop culture area of Funing Bay and to explore the influence of water quality factors on phytoplankton, the main water quality factors of the sea area were determined monthly from May to November 2020, and the phytoplankton was counted. A total of 69 species of phytoplankton were identified, of which 33 were dominant. The density of phytoplankton in the studied area is (8.3-267.9)×104 cell/L and is the highest in May. The biodiversity index is 0.458-3.747, the evenness index is 0.099-0.796, and the richness index is 0.933-4.755. The seawater temperature range is 11.8 ℃-26.8 ℃, the salinity is 28.8-34.0, the active silicate (SiO32--Si) content is 0.025-0.627 mg/L, and the nitrate nitrogen (NO3--N) concentration is 0.057-0.284 mg/L, with an “up-down” trend. The pH range is 7.867-8.190, chemical oxygen demand (COD) is 0.260-1.415 mg/L, active phosphate (PO43--P) is 0.003-0.006 mg/L, and the change trend is “down-up.” An analysis of dominant species and water quality factors shows that the main environmental factors affecting the changes in phytoplankton in this sea area are active silicate, salinity, active phosphate, and nitrate nitrogen. Bacillariophyta and Euglenophyta are positively correlated with active phosphate and salinity and negatively correlated with active silicate and nitrate nitrogen. Pyrrophyta is positively correlated with active silicate and negatively correlated with active phosphate and nitrate nitrogen. Cryptophyta is positively correlated with active silicate and salinity and negatively correlated with nitrate. |
| Key words: Argopecten irradians culture area nutrients phytoplankton redundancy analysis |
