Estimated Prochlorococcus growth rates and nitrogen demand

Range Table - link
Organism Cyanobacteria Prochlorococcus spp.
Reference Casey, Lomas, Mandecki & Walker, Prochlorococcus contributes to new production in the Sargasso Sea deep chlorophyll maximum, Geophysical research letters, Vol. 34, L10604, doi:10.1029/2006GL028725, 2007 link p.3 table 2
Primary Source See refs beneath table
Comments P.2 right column bottom paragraph to p.3 left column top paragraph: "[8] From the specific uptake rates measured in this study physiological growth rates can be estimated (see auxiliary material for additional details), assuming that ‘instantaneous’ nitrogen assimilation rates are coupled to growth rates. Moreover, these estimates of growth rate will be conservative estimates as not all nitrogen substrates that might be assimilated were measured. With these caveats, physiological growth rates are estimated to be 0.42 ± 0.17 d^−1 in good agreement with other growth rate estimates from natural populations (Table 2) and data from culture studies under comparable light and temperature conditions [Moore et al., 1995]. Moreover, these growth rate estimates are on par with grazing loss estimates from dilution experiments (Table 2). These growth rate estimates, coupled with the observation that 90–95% of the total N assimilated is from NH4+ and urea, suggest that natural Prochlorococcus populations in the Sargasso Sea are using primarily reduced nitrogen substrates to support the high gross growth rates needed to balance high grazing mortality." See notes beneath table
Entered by Uri M
ID 113038