Phytoplankton size structure and primary production in a highly dynamic coastal ecosystem (Ría de Vigo, NW-Spain): Seasonal and short-time scale variability

Cermeño, Pedro; Marañón, Emilio; Pérez, Valesca; Serret, Pablo; Fernández, Emilio; Castro, Carmen G.

doi:10.1016/j.ecss.2005.11.027

Cited by 142 publications

(132 citation statements)

References 36 publications

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“…Despite the high renewal rate of the study volume, the net ecosystem production was elevated, 1.0-1.5 g C m -2 d -1 . It is comparable to the values obtained in the Rías Baixas during the upwelling season Moncoiffé et al, 2000;Cermeño et al, 2006;Arístegui et al, 2009) and to the gross primary production of the northern Galician coast (Bode et al, 1996;Bode and Varela, 1998). Therefore, although the nutrient levels in shelf waters (Prego et al, 1999) and the offshore Ekman transport (see section 4.1) are lower than off the Rías Baixas, the reduced dimensions of the Ría de Ares-Betanzos leads to comparable nutrient inputs and net ecosystem production rates per unit of surface area.…”

Section: Nutrient Fertilization and Net Utilization Patternssupporting

confidence: 72%

“…Pérez et al, 2000) and of most temperate coastal ecosystems (Howarth, 1988;Wollast 1993). The resulting net ecosystem production rates, 0.2-0.3 g C m -2 d -1 , can be considered representative of summer stratification in the Galician coast (Moncoiffé et al 2000;Cermeño et al, 2006) and about one half to one third the expected gross primary production under these conditions in the study area (Bode et al, 1996;Bode and Varela, 1998).…”

Section: Nutrient Fertilization and Net Utilization Patternsmentioning

confidence: 99%

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Net ecosystem metabolism of a coastal embayment fertilised by upwelling and continental runoff

Villegas‐Ríos

Álvarez‐Salgado

Piedracoba

et al. 2011

Continental Shelf Research

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O 2 , N, P and Si net ecosystem metabolism of the Ría de Ares-Betanzos (NW Iberian upwelling system) was estimated during two 3-wk periods of contrasting summer downwelling and autumn upwelling conditions by means of a transient 2-D kinematic box model. The subtidal circulation was positive in both situations, although it was depressed during downwelling and enhanced during upwelling. Concurrently, the ría was fertilised mainly by shelf bottom waters, which introduced from 69% (under downwelling) to almost 100% (under upwelling) of the limiting N nutrients. The ría was an efficient nutrient trap: about 70% of the N nutrients that entered the embayment were retained under downwelling conditions (average flushing time, 9 days) and about 50% under upwelling conditions (average flushing time 3 days). Although the trapping efficiency was lower, the net ecosystem production (NEP) was much higher under upwelling (from 1.0 ± 0.3 to 1.5 ± 0.4 g C m -2 d -1 ), than under downwelling favourable winds (from 0.2 ± 0.1 to 0.3 ± 0.1 g C m -2 ). The stoichiometry of NEP suggests that P and N compounds recycled faster than C compounds, specially in the inner segment of the ría. The net degree of silification was twice in the inner than in the outer segment of the ría.

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Section: Nutrient Fertilization and Net Utilization Patternssupporting

confidence: 72%

Section: Nutrient Fertilization and Net Utilization Patternsmentioning

confidence: 99%

Net ecosystem metabolism of a coastal embayment fertilised by upwelling and continental runoff

Villegas‐Ríos

Álvarez‐Salgado

Piedracoba

et al. 2011

Continental Shelf Research

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“…The contribution of small phytoplankton to total primary production is in the range 5-30% (no winter-winter) in this coastal ecosystem (Cermeño et al, 2006). We subtracted 5 and 30% to estimates of primary production during no winter and winter, respectively, to eliminate the contribution of the smallest phytoplankton groups (<2 µm equivalent spherical diameter, ESD), which were not considered in our estimates of photosynthetic carbon biomass.…”

Section: Determination Of Primary Production Ratesmentioning

confidence: 99%

Marine Primary Productivity Is Driven by a Selection Effect

et al. 2016

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The number of species of autotrophic communities can increase ecosystem productivity through species complementarity or through a selection effect which occurs when the biomass of the community approaches the monoculture biomass of the most productive species. Here we explore the effect of resource supply on marine primary productivity under the premise that the high local species richness of phytoplankton communities increases resource use through transient selection of productive species. Using concurrent measurements of phytoplankton community structure, nitrate fluxes into the euphotic zone, and productivity from a temperate coastal ecosystem, we find that observed productivities are best described by a population growth model in which the dominant species of the community approach their maximum growth rates. We interpret these results as evidence of species selection in communities containing a vast taxonomic repertory. The prevalence of selection effect was supported by open ocean data that show an increase in species dominance across a gradient of nutrient availability. These results highlight the way marine phytoplankton optimize resources and sustain world food stocks. We suggest that the maintenance of phytoplankton species richness is essential to sustain marine primary productivity since it guarantees the occurrence of highly productive species.

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“…Primary production is dependent on physical (light availability and temperature), chemical (nutrients) and biological factors, like phytoplankton biomass, species composition, size structure and grazing (Stearns et al, 1987;Cloern, 1991;Landry et al, 1995;Gallegos and Jordan, 1997;Calbet and Landry, 2004;Cermeno et al, 2006), as well as viral control (Proctor and Fuhrman, 1991).…”

Section: Introductionmentioning

confidence: 99%

Pelagic metabolism of the Douro estuary (Portugal) – Factors controlling primary production

Azevedo

Duarte

Bordalo

2006

Estuarine, Coastal and Shelf Science

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The pelagic metabolism of the Douro estuary (Portugal) and the factors influencing primary production (PP) and community respiration (CR) in this system were studied during an annual cycle (December 2002eDecember 2003. Sampling surveys were conducted twice a month during ebb and flood spring tides and water samples were collected for PP and CR assessments at three stations along the estuary (lower, middle and upper stretches). During the study period, PP values were in the range of 4.7e1878.5 mg C m ÿ2 d ÿ1 (average, 319.9 mg C m ÿ2 d ÿ1 ). River discharge controlled phytoplankton biomass inputs into the estuary as well as residence time. A decreasing trend in water column PP from the upper to the lower estuary related to higher nitrogen concentrations and phytoplankton biomass from riverine origin was observed. An inverse trend was found for CR, i.e., higher values were found in the lower, more urbanized stretch. During the study period, averaged CR values reached 1154 mg C m ÿ2 d ÿ1 . In general, heterotrophy dominated the entire estuary, except in the upper stretch from May through July, when increased PP, but also lower CR values were recorded. A positive correlation between chlorophyll a and P max was found which is unusual in coastal ecosystems, where a decreasing trend of the P/B ratio as a function of net primary production is generally observed. This could be explained by the relatively low phytoplankton biomass, preventing intraspecific competition from lowering photosynthetic capacity, on one hand, and the physiology of phytoplankton related to their origin in a semi-lotic (reservoir) ecosystem. No significant differences between tides were observed for all variables, except for the water light extinction coefficient (k) values, reflecting higher turbidity during the ebb.

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Phytoplankton size structure and primary production in a highly dynamic coastal ecosystem (Ría de Vigo, NW-Spain): Seasonal and short-time scale variability

Cited by 142 publications

References 36 publications

Net ecosystem metabolism of a coastal embayment fertilised by upwelling and continental runoff

Net ecosystem metabolism of a coastal embayment fertilised by upwelling and continental runoff

Marine Primary Productivity Is Driven by a Selection Effect

Pelagic metabolism of the Douro estuary (Portugal) – Factors controlling primary production

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