台湾海峡微微型浮游植物的生态研究 Ⅱ. 类群组成、生长速率及其影响因子  

Ecological study on picophytoplankton in the Taiwan Strait Ⅱ. Group composition,growth rate and its affecting factors

作　　者：黄邦钦[1] 洪华生[1] 林学举[1] 欧林坚[1] 

机构地区：[1]厦门大学海洋环境科学教育部重点实验室,环境科学研究中心,福建厦门361005

出　　处：《海洋学报》2003年第6期99-105,共7页

基　　金：国家自然科学基金资助项目(49636220;49776308;40076031);教育部骨干教师基金资助项目.

摘　　要：1997年8月、1998年2～3月和1998年8月,应用荧光显微镜、14C法分别测定了台湾海峡微微型浮游植物的类群组成和生长速率,探讨了该海域原绿球藻的存在及丰度问题.结果表明,在类群的丰度组成上,该海域以含藻红素的蓝细菌(PE细胞)占优势,平均为83%～93%(航次平均范围,下同),微微型真核浮游植物(EU细胞)次之,平均为7%～11%,含藻蓝素的蓝细菌(PC细胞)最少,平均为0%～6%;在碳生物量的组成上,PE细胞仍占优势,但其贡献率降低(52%～74%),EU细胞所占比例则升高(26%～44%).台湾海峡微微型浮游植物生长速率的变异性较大(0 52～2 25d-1),这可能与其所在测站的环境异质性(如营养盐的差异等)有关.采用叶绿素估算法证实该海域存在原绿球藻,其丰度介于107～108个/dm3之间,若将此考虑在内,在类群的丰度和生物量组成上,原绿球藻占优势(1998年8月碳生物量贡献率除外,为22%),丰度贡献率为63%～99%,碳生物量贡献率为60%～94%.The studies on the composition, growth rate and environmental controlling were carried out during three cruises in the Taiwan Strait (August 1997, February-March 1998 and August 1998) using epifluorescence microscopy and ()^(14)C-radiotracer. The results show that phycoerythrin-rich cyanobacteria (PE) dominate in abundance (contributed 83%～93%), picoeukaryotes (EU) are second and phycocyanin-rich cyanobacteria (PC) are the least abundant. With carbon biomass, PE still predominates although the contribution goes down (52%～74%), EU's contribution increases up to 26%～44%. Growth rate of picophytoplankton varies from 0.52 to (2.25 d^(-1)), which may be due to different environmental parameters (e.g.,nutrients) in the study area. Prochlorococcus may occur in the Taiwan Strait by using chl.a evaluation, its abundance ranges between 10~7 and 10~8 cell/dm^3, Prochlorococcus dominate the picophytoplankton both in abundance and biomass if included in picophytoplankton in the Taiwan Strait in August 1997, and February-March 1998, however, cyanobacteria dominate in carbon biomass in August 1998.

关 键 词：微微型浮游植物 生长速率 类群组成 台湾海峡 环境影响 

分 类 号：Q178.53[生物学—水生生物学]