Phytoplankton study of ship ballast water based on high seas exchange

Abstract:

April 2015 to July 2016, the samples for ballast water were collected from six vessels that were docked in the upper ocean mountain harbor and who conducted the last ballast in the coastal of China. There were totally 22 species of phytoplankton under 3 phyla, including 17 ofBacillariophyta,4 of Pyrrophytaand 1 of Chrysophyta. The dominant species is diatoms.The phytoplankton from bohai sea covers 5 genes from two phyla with the abundance of 9.66 x 10² cells/L. 10 genes from 3 phyla were identified from the water samples from yellow sea water with the density of 17.91 x 10² cells/L. the abundance of water samples from east China sea is 6.83 x 10² cells/L, including four genes from 2 phyla.The phytoplankton abundance in south China sea is 22.915 x 10²cells/L, including 11 genes (6 for Bacillariophytaand 5 for Pyrrophyta) of 2 phyla.The survey found that there is a difference between phytoplankton and phytoplankton in the ballast water of ships arriving at the port.The composition of phytoplankton in the ballast water may be influenced by local air-bearing groups and seasonal factors. A small number of species in ballast water are exotic species introduced into other sea areas or red tide species in other sea areas.