title: [Chlorophyll-a concentration and phytoplankton size-fractionated composition in Jiaozhou Bay].
abstract: An investigation was made on the chlorophyll-a (Chla) concentration and phytoplankton size-fractionated composition in Jiaozhou Bay and its adjacent waters in February, May, August, and November 2008. The average annual Chla concentrations inside and outside the Bay was 4.90 mg x m(-3) and 2.03 mg x m(-3), respectively. The Chla concentration presented a decreasing trend from the northeast and near-shore to the central, south, and outside of the Bay, and had an obvious double-peak seasonal variation, being higher in summer and winter. The phytoplankton in the Bay was dominated by nanophytoplankton, accounting for 60.9% of the total Chla concentration, followed by microphytoplankton, and picophytoplankton, which was consistent with the phytoplankton size-fractionated composition in coastal waters of China. Comparing with historical data, the proportion of nanophytoplankton in the Bay had some increase, while that of picophytoplankton decreased to some extent.
authors.affiliation: Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Shandong, China. panshengjun4089@163.com
authors.forename: Sheng-Jun
authors.initials: SJ
authors.lastname: Pan
authors.forename: Zhi-Liang
authors.initials: ZL
authors.lastname: Shen
mesh_terms: D002681:China; D002734:Chlorophyll / Q000032:analysis*; D000077194:Chlorophyll A; D017753:Ecosystem; D053758:Nanoparticles; D010316:Particle Size; D010839:Phytoplankton / Q000145:classification / Q000254:growth & development*; D012621:Seasons; D012623:Seawater / Q000032:analysis*
chemical_list: D002734:Chlorophyll; D000077194:Chlorophyll A