Seasonal abundance of the microplankton population in the North Pacific central gyre

Latitudinal pattern of abundance and composition of ciliate communities in the surface waters of the Atlantic Ocean

“…Heterotrophic ciliate abundance and biomass estimates are equal to or lower than values reported earlier in offshore waters of the Atlantic Ocean (Verity et al 1993, Stoecker et al 1994, Froneman & Perissinotto 1996, Lessard & Murrell 1996, Froneman 2004, Santoferrara & Alder 2009, Montagnes et al 2010 and in the studies conducted in the Pacific Ocean (Beers et al 1982, Verity et al 1996, Suzuki & Taniguchi 1998, Ota & Taniguchi 2003, Yang et al 2004, Liu et al 2013) and the Indian Ocean (Sorokin et al 1985, Leakey et al 1996. Most of the aforementioned studies applied a different biomass coefficient of 0.19 pg C per cubic micrometer of cell volume, which was determined by Putt & Stoecker (1989).…”

Subsurface chlorophyll maximum in August-September 1985 in the CLIMAX area of the North Pacific

“…The relative bias between GF/C and the finer GF/F glass fiber filters is about 15 % in low-chlorophyll waters (Venrick & Hayward 1984) and may be similar for comparisons between GFIC and HA chlorophyll retention. The higher densities of flagellates observed relative to Beers et al (1982) likely reflect recent improvements in preservation and epifluorescent counting techniques. Depthintegrated chlorophyll, 0 to 150 m, was correlated with the chlorophyll concentration at the DCM (Fig.…”

“…Plankton biomass in the DCM Beers et al (1982) reported microplankton biomass at the depth of the DCM from a cruise in August-September 1973 to the CLIMAX station. They reported total microplankton biomass of 9 yg C I-', standard deviation 4 kg C I-', based upon later microscopic study of preserved samples.…”

“…The feature has been s t u d e d in considerable detail at the CLIMAX (S10 1974) station, 28"N 155" W, where it is found at about 100 m depth. Studies in the 1970's suggested it was neither a phytoplankton biomass (Beers et al 1975(Beers et al , 1982) nor a primary production maximum. Apparently the elevated chlorophyll reflected a photoadaptive response of the phytoplankton, altering the chlorophyll/biomass ratio (Eppley et al 1973(Eppley et al , E e f e r et al 1976.…”

High phytoplankton growth and production rates in oligotrophic Hawaiian coastal waters1

“…The low ambient nutrient concentrations, the evidence of incipient nitrogen deficiency (Thomas 1970), and other indirect evidence about physiological states are consistent with such a supposition, however. Furthermore, estimates of plankton standing stock from microscopy and ATP (Beers et al 1975(Beers et al , 1982, combined with 14C production estimates, also suggest lower growth rates in the North Pacific gyre than in inshore California coastal waters (Eppley et al 1973;Sharp et al 1980).…”