Photosynthetic parameters and primary production of phytoplankton populations off the northern coast of Peru

Harrison, W. G.; Platt, Trevor; Calienes, Ruth; Ochoa, Noemí

doi:10.1029/co001p0303

Cited by 21 publications

(16 citation statements)

References 10 publications

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“…Such low numbers are characteristic of nutrient-stressed phytoplankton populations (e.g. Harrison et al 1981). These results suggest that phyto- Table 4).…”

Section: Phytoplankton Productivitymentioning

confidence: 87%

Plankton response following a spring upwelling event in the Ria de Arosa, Spain

Rb¹,

Alvarez-Ossorio²,

Cal³

et al. 1986

Mar. Ecol. Prog. Ser.

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Phytoplankton and bacterioplankton growth dynamics, and biomass and ingestion rates of zooplankton and mussels hung from rafts in the Ria de Arosa, Spain, were studied after a spring upwelling event. Upwelling of North Atlantic Central Water was confirmed by salinity, temperature and nutrient properties of the bottom waters in the Ria and the positive upwelling index calculated for the study period. On 11 March. 1983, primary production and chlorophyll a concentrations exceeded 30 mg C m-3 h-' and 10 mg m-3, respectively, in the surface waters. After the upwelling period primary production decreased to < 2 mg C m-3 h-'. Our results show that bacterial growth dynamics were spatially (vertically) separated from phytoplankton growth dynamics following the upwelling event. The hghest specific rate of bacterial production occurred below the depth of maximum photosynthesis and above the thermocline. The highest rates of bacterial production were < 10 O/O of phytoplankton production. Zooplankton (>333 km) grazing experiments indicated an active selection of phytoplankton over bacteria and a sufficient grazing rate (90 to 124 '

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“…Such low numbers are characteristic of nutrient-stressed phytoplankton populations (e.g. Harrison et al 1981). These results suggest that phyto- Table 4).…”

Section: Phytoplankton Productivitymentioning

confidence: 87%

Plankton response following a spring upwelling event in the Ria de Arosa, Spain

Rb¹,

Alvarez-Ossorio²,

Cal³

et al. 1986

Mar. Ecol. Prog. Ser.

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“…2) produced the decrease in Zeu, in the nutrient concentration and in PB max (Table 3). Since high PB max values indicate favorable physiological conditions of autotrophs (Harrison et al 1981), the increase of the self-shading effect after the phytoplankton growth could be responsible of the lower PB max values in the coastal waters (onshore advection) after the upwelling event.…”

Section: Discussionmentioning

confidence: 99%

Multiscale upwelling forcing cycles and biological response off north-central Chile

Rutllant

Montecino

2002

Rev. chil. hist. nat.

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The physical forcing of the upwelling along the subtropical west coasts of the continents encompasses a broad range of time scales which shape both phytoplankton biomass (Chl-a) and primary productivity (carbon fixation) changes over any given time interval. The narrow continental shelf and the steep alongshore orography off north-central Chile provide for a unique combination of year-round, upwelling-favorable winds with quasi-weekly upwelling pulses associated with atmospheric coastal-trapped disturbances (coastal lows). This variability is modulated by intraseasonal oscillations in the depth of the thermo/nutricline, produced by coastal-trapped waves in the ocean, upon which annual (seasons) and interannual (ENSO) cycles are superimposed. During coastal field experiments off Cruz Grande bay (29º S), carried on in November 1987 and 1988 (opposite extremes of the ENSO cycle), mean changes of the phytoplankton-integrated Chl-a (B) and carbon fixation rate (PP) from the active to the relaxed phases of the local upwelling forcing cycle (phytopattern) were characterized. Those data were contrasted against similar ones reported off Punta Lengua de Vaca (Coquimbo, 30º S) and off Mejillones peninsula (Antofagasta, 23º S), encompassing different seasons and phases of intraseasonal and interannual (ENSO) cycles from 1992 to 1997. A "warm" phyto-pattern was schematically characterized by a significant increase in B and a quasi-steady evolution of PP from the active to the relaxed phases of one complete upwelling event. Conversely, relative small changes in B and a significant increase in PP characterized a "cold" phyto-pattern. It is proposed here that the ENSO "cold/warm" signal may be offset by more than one opposite "thermal" condition (seasonal and/or intraseasonal) in defining a "warm" or "cold" phyto-pattern associated with a particular cycle of the local upwelling forcing.Key words: Chile, coastal upwelling, phytoplankton, local and remote upwelling forcing cycles, coastal-trapped waves, ENSO cycle. RESUMENEl forzamiento físico de la surgencia a lo largo de las costas occidentales de los continentes comprende una amplia gama de escalas temporales que configuran los cambios en la biomasa fitoplanctónica (Cl-a) y en la productividad primaria (fijación de carbono) sobre un intervalo de tiempo cualquiera. La estrecha plataforma continental y la fuerte pendiente orográfica a lo largo de la costa en el norte y centro de Chile proporcionan una combinación única de vientos favorables a la surgencia durante todo el año con pulsos de surgencia cuasi-semanales asociados con perturbaciones atmosféricas atrapadas a la costa ("bajas costeras"). Esta variabilidad es modulada por oscilaciones intraestacionales en la profundidad de la termo/nutriclina producida por ondas oceánicas atrapadas a la costa, sobre las cuales se superponen los ciclos anuales (estaciones) e interanuales (ENOS). Durante los experimentos costeros frente a la bahía de Cruz Grande (29,5º S) realizados en noviembre de 1987 y 1988 (extremos opuestos del...

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“…It is currently believed that Ͼ99% of total dissolved Fe in the ocean is complexed by these organic binding ligands (Rue and Bruland 1995). This ''aging'' condition appears necessary to increase photosynthetic production in recently upwelled waters off Peru (Harrison et al 1981). The bioavailability of Fe is dependent on the production of Fe-binding ligands by phytoplankton, a process that can take from hours to days (Barbeau et al 2001).…”

Section: Coastal Waters Of the Peruvian Continental Shelf-east-mentioning

confidence: 99%

Influence of iron on algal community composition and physiological status in the Peru upwelling system

et al. 2005

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Phytoplankton community structure in the eastern Equatorial Pacific (EEP) and the Peru upwelling system was determined using ChemTax analysis of pigment data. Photosynthetic efficiencies (F v : F m ), concentrations of macronutrients, iron (Fe), and the redox proteins flavodoxin (Flv) and ferredoxin (Fd) were used to assess the physiological status of the algal communities with respect to Fe. Diel periodicity in

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Photosynthetic parameters and primary production of phytoplankton populations off the northern coast of Peru

Cited by 21 publications

References 10 publications

Plankton response following a spring upwelling event in the Ria de Arosa, Spain

Plankton response following a spring upwelling event in the Ria de Arosa, Spain

Multiscale upwelling forcing cycles and biological response off north-central Chile

Influence of iron on algal community composition and physiological status in the Peru upwelling system

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