Phytoplankton growth rates in the Atlantic subtropical gyres

  title={Phytoplankton growth rates in the Atlantic subtropical gyres},
  author={Emilio Mara{\~n}{\'o}n},
  journal={Limnology and Oceanography},
  • E. Marañón
  • Published 1 January 2005
  • Environmental Science
  • Limnology and Oceanography
Reported estimates of phytoplankton growth rate (µ) in the subtropical gyres range widely from 0.1–0.2 to 1–2 d−1. Dividing chlorophyll a (Chl a)‐normalized photosynthesis (PB) by the phytoplankton carbon (C) to Chl a ratio (C : Chl a) yields an estimate of phytoplankton µ. To reduce the current uncertainty regarding phytoplankton µ in the subtropical gyres, I have reviewed >230 determinations of Chl a‐normalized photosynthesis (PB) and >40 determinations of phytoplankton C: Chl a obtained in… 

Phytoplankton Growth and Microzooplankton Grazing in the Subtropical Northeast Atlantic

The integrated balances between phytoplankton growth and grazing losses were close to zero, although deviations were detected at several depths, adding up to increased evidence indicating an autotrophic metabolic balance in oceanic subtropical gyres.

Phytoplankton community structure and dynamics in the North 1 Atlantic subtropical gyre 2

16 Phytoplankton fuel epipelagic ecosystems and affect global biogeochemical cycles. 17 Nevertheless, there is still a lack of quantitative information about the factors that 18 determine both

Size-fractionated phytoplankton biomass and production in the tropical Atlantic

It is suggested that the differential impact of light on small and large phytoplankton may help to explain the contrasting dynamics of the two size classes.

Planktonic carbon budget in the eastern subtropical North Atlantic

The results suggest that the view that bacteria dominate carbon cycling in the unproductive ocean must be reconsidered, or else that in vitro incubations misrepresent the real metabolic rates of one or several microbial groups.

Nutrient and temperature constraints on primary production and net phytoplankton growth in a tropical ecosystem

The Red Sea depicts a north–south gradient of positively correlated temperature and nutrient concentration. Despite its overall oligotrophic characteristics, primary production rates in the Red Sea

Plankton metabolism in surface waters of the tropical and subtropical Pacific Ocean

Results indicate that variability in nutrient availability consti- tutes an important regulator of net productivity and plankton community structure in large regions of the open ocean.



High phytoplankton growth and production rates in the North Pacific subtropical gyre1,2

Rates of phytoplankton growth and production were measured with 14C techniques at stations near the Hawaiian Islands and at about 28°N, 155°W in the North Pacific subtropical gyre during August and

Photosynthetic parameters of phytoplankton from 50°N to 50°S in the Atlantic Ocean

A significant, negative correlation between the latitudinal changes in P: and those in the depth of the nitracline is found, suggesting an important role for the nutrient supply from below the thermocline in the regulation of photosynthetic efficiency over large spatial scales.

High variability of primary production in oligotrophic waters of the Atlantic Ocean: uncoupling from phytoplankton biomass and size structure

Across the wide range of measured primary productivity rates, the persistent dominance of picophytoplankton indicates that the microbial loop and the microbial food web continued to be the most important trophic pathways.

Microzooplankton grazing activity in the temperate and sub-tropical NE Atlantic: summer 1996

It is concluded that microzooplankton formed a significant component of the food web in the NE Atlantic and were important controllers of phytoplankton production, particularly in temperate waters, during this investigation period.

Response of Sargasso Sea phytoplankton biomass, growth rates and primary production to seasonally varying physical forcing

The model demonstrated that the observed response of the phytoplankton to nutrient enrichment is only possible when phyto- plankton growth is not severely limited by nutrients.

Protist control of phytoplankton growth in the subtropical north-east Atlantic

The grazing impact of protists on phytoplankton primary production in a highly oligo- trophic area of the subtropical north-east Atlantic, south-east of the Azores, was studied using the dilution method and the net primary production closely oscillated around zero in the chlorophyll a analyses and was positive in the flow-cytometry analyses, suggesting a balanced or slightly autotrophic phy toplankston- protist compartment.

Microzooplankton herbivory and phytoplankton growth in the northwestern Sargasso Sea

Microzooplankton grazing and phytoplankton growth rates were measured with the dilution technique during spring, summer and fall in the oligotrophic Sargasso Sea near Bermuda. Phytoplankton growth