Data on weekly to bimonthly particle flux collected by sediment traps in three environments show that forms of silicoflagellates do not have a simple and consistent relationship to either temperature or productivity of the overlying water column. Sites were located in the fjords of British Columbia, along a transect off the coast of southern Oregon, and in San Pedro Basin of the Southern California Bight. Either the “cool”Distephanus speculum or the “warm”Dictyocha messanensis may dominate at temperatures over a range from 10–19°C.D. speculum dominated high-productivity periods off Oregon, whileD. messanensis dominated during coastal upwelling events in the San Pedro Basin, regardless of surface temperature.Octactis pulchra showed no distinctive trend in the San Pedro Basin, the only locality where it was observed. The isolated presence ofD. speculum in the fjords, where mixed-zone salinity may be as low as 11‰, indicates a tolerance for hyposaline waters, but no other trends could be defined with respect to surface salinity.
Constance Sancetta. Seasonal occurrence of silicoflagellate morphologies in different environments of the eastern Pacific Ocean[J]. Marine Micropaleontology,1990,16(3-4):285-291.
APA
Constance Sancetta.(1990).Seasonal occurrence of silicoflagellate morphologies in different environments of the eastern Pacific Ocean.Marine Micropaleontology,16(3-4),285-291.
MLA
Constance Sancetta."Seasonal occurrence of silicoflagellate morphologies in different environments of the eastern Pacific Ocean".Marine Micropaleontology 16.3-4(1990):285-291.
修改评论