title: Distribution and controlling factors of phytoplankton assemblages in a semi-enclosed bay during spring and summer.
abstract: The phytoplankton assemblages' patterns and their correlation to environmental factors were studied in Bohai Bay during spring and summer. Two zones, the northern (NWA) and southern (SWA) water area, were identified by cluster analysis based on their physical and chemical properties. Principal component analysis (PCA) showed that more phytoplankton species was found in the SWA with low nutrient concentration, while high phytoplankton abundance occurred in the NWA with high nutrient concentration. The seasonal variability in phytoplankton can be explained by water temperature, nutrient, and hydrodynamic conditions (includes mixing during spring and stratification during summer). Results of redundancy analysis (RDA) showed that silicate (SiO(4)) and soluble reactive phosphorus (SRP) were the most important environmental factors influencing the phytoplankton distribution during spring and summer, respectively. Hydrodynamics condition plays a key role in controlling variation of the environmental factors, which determined phytoplankton distribution in Bohai Bay.
authors.affiliation: The First Institute of Oceanography, State Oceanic Administration (SOA), Qingdao 266061, China.
authors.forename: Shitao
authors.initials: S
authors.lastname: Peng
authors.forename: Xuebo
authors.initials: X
authors.lastname: Qin
authors.forename: Honghua
authors.initials: H
authors.lastname: Shi
authors.forename: Ran
authors.initials: R
authors.lastname: Zhou
authors.forename: Mingxin
authors.initials: M
authors.lastname: Dai
authors.forename: Dewen
authors.initials: D
authors.lastname: Ding
mesh_terms: D061006:Bays / Q000737:chemistry*; D044822:Biodiversity; D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D005068:Eutrophication; D015999:Multivariate Analysis; D010839:Phytoplankton / Q000145:classification / Q000254:growth & development*; D025341:Principal Component Analysis; D014872:Water Movements; D014873:Water Pollutants / Q000032:analysis; D014876:Water Pollution / Q000706:statistics & numerical data*
chemical_list: D014873:Water Pollutants