Effects of pulsed nutrient enrichment on enclosed phytoplankton: ecophysiological and successional responses

Estrada, Marta; Berdalet, Elisa; Vila, Magda; Marrasé, Cèlia

doi:10.3354/ame032061

Cited by 15 publications

(14 citation statements)

References 35 publications

(42 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although they did not focus on differences in the source of nitrogen and there are some clear divergences between their experimental setup and our own (e.g. single initial amendment vs. continuous intermittent nutrient supply, temporal length of the experiment, total nutrient load), the results of Estrada et al (2003) support the view that nutrient imbalances per se are not important when the absolute amounts of each nutrient exceed limitation (or preference) thresholds. In their experiments, differences in the phytoplanktonic cells were only perceptible during a post-bloom phase, ca.…”

Section: Effect Of Nutrient Amendments and N-sourcesupporting

confidence: 67%

“…7 should hold. A quick bacterial response was also found by Guadayol et al (2009) in a series of experiments, but in their study, bacterial increases were rapidly overridden by autotrophic growth during most of the year. Estrada et al (2003) also found bacterial peaks following nutrient additions; yet again, these were minor compared to the chl a response. Unlike these studies, water for our experiments was sampled in Barcelona's coastal waters.…”

Section: Common Patterns and General Considerationsmentioning

confidence: 94%

“…A likely explanation is that there were enough nutrients for all organisms to grow, regardless of their preferences for nitrate or ammonium, so that the organisms could maintain their preferential uptake for 3 d without triggering any mechanism of competitive exclusion. Similarly, Estrada et al (2003) explored changes in the phytoplankton following nutrient additions with variable N:P ratios. Although they did not focus on differences in the source of nitrogen and there are some clear divergences between their experimental setup and our own (e.g.…”

Section: Effect Of Nutrient Amendments and N-sourcementioning

confidence: 99%

See 2 more Smart Citations

Dynamic forcing of coastal plankton by nutrient imbalances and match-mismatch between nutrients and turbulence

Romero¹,

Peters²,

Marrasé³

2012

Mar. Ecol. Prog. Ser.

Self Cite

View full text Add to dashboard Cite

Section: Effect Of Nutrient Amendments and N-sourcesupporting

confidence: 67%

Section: Common Patterns and General Considerationsmentioning

confidence: 94%

Section: Effect Of Nutrient Amendments and N-sourcementioning

confidence: 99%

See 1 more Smart Citation

Dynamic forcing of coastal plankton by nutrient imbalances and match-mismatch between nutrients and turbulence

Romero¹,

Peters²,

Marrasé³

2012

Mar. Ecol. Prog. Ser.

Self Cite

View full text Add to dashboard Cite

“…They suggested that the higher biomass in the pulsed enrichments was due to a larger temporal mismatch between growth of phytoplankton and their zooplankton grazers. In contrast, Estrada et al (2003) did not find any effect of nutrient addition frequency on the phytoplankton community in microcosm experiments in the Mediterranean. The initial nutrient concentrations in their study, however, were much higher than in our study; it is thus possible that the phytoplankton was not nutrient-limited at the beginning of their experiment.…”

Section: Phytoplankton Community Responsesmentioning

confidence: 57%

Interaction effects of N:P ratios and frequency of nutrient supply on the plankton community in the northern Baltic Sea

Lagus

Suomela²,

Helminen³

et al. 2007

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

An experiment was carried out in brackish seawater mesocosms to investigate the impacts of different N:P ratios and frequency of nutrient supply on phytoplankton and zooplankton communities in the Archipelago Sea, part of the northern Baltic Sea. The experiment used a 2 × 2 factorial design in which nitrogen (N) and phosphorus (P) were added in either an N-deficient or Redfield ratio either daily or at 1 wk intervals. Both phytoplankton total biomass and the biomass of most phytoplankton groups increased most in the enrichments with a Redfield ratio. The effect of nutrient addition frequencies varied with time and between the 2 nutrient ratios. The biomass of heterocystous N 2 -fixing cyanobacteria was highest in the daily nutrient enrichment, while chlorophytes increased most in the weekly Redfield treatment. The concentration of cyanobacterian hepatotoxins increased during the experiment, but was not affected by the nutrient enrichments. The biomass of calanoid copepods increased more in the weekly than in the daily enrichments when the nutrients were supplied in a Redfield ratio. Small rotifers, on the other hand, were favored by the Redfield nutrient enrichment, especially when the nutrients were added daily. Based on the results of this study it seems that a daily nutrient supply favors cyanobacterial growth, while an intermittent but heavier nutrient discharge may result in a more advantageous plankton community, with fewer cyanobacteria and a zooplankton community dominated by larger species.KEY WORDS: Phytoplankton · Cyanobacteria · Zooplankton · Nutrient pulsing · Nutrient ratio · Mesocosm · Factorial design · Baltic Sea Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 332: [77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92] 2007 Phytoplankton species selection based on competition for nutrients is dependent on species-specific differences in nutrient transport kinetics, assimilation, and storage capacity (Tilman et al. 1982, Sommer 1989. Sommer (1985) divided algae into 3 categories based on their ability to utilize nutrients: (1) affinity specialists -species that have low requirements for nutrients and are efficient users of low nutrient concentrations; (2) velocity specialists -species that have high uptake and growth rates and are able to utilize temporary nutrient enrichment for rapid growth; and (3) storage specialists -species that are capable of storing nutrients in intracellular pools and which usually have relatively high uptake rates but only moderate maximum growth rates. A low and continuous nutrient supply should select for affinity specialists, whereas a pulsed nutrient supply should favor both velocity specialists that are capable of rapid growth after nutrient pulses and storage specialists that are capable of luxury consumption (Sommer 1985, Grover 1991.The nutrient kinetics of phytoplankton are strongly related to size (Stolte & Riegman 1996). Small algal species, with a high cellular surface to volume ratio, a...

show abstract

“…She also helped to quantify the importance of plankton activity in biogeochemical fluxes under different conditions of nutrient and light availability. To address these questions she used a variety of approaches, ranging from experimental work (Estrada et al, 2003 to field work (Estrada 1979, and different biogeochemical methodologies: phosphorus nutrient deficient inputs (Berdalet et al 1996), biochemical relations with primary production (Berdalet et al 1993b, CO 2 links with frontal zones (Delgado and Estrada 1994), relationships of dissolved organic carbon with phytoplankton (Estrada and Morán 1996), DNA relative to biomass , excess of carbohydrate synthesis (Fraga et al 1999), variability of photosynthesis parameters (Morán and Estrada 2001) and enzyme kinetics principles (Packard et al 2004). …”

Section: Combining Different Approaches To Build a Reliable Conceptuamentioning

confidence: 99%

The ecology of plankton in biological oceanography: a tribute to Marta Estrada’s task

et al. 2016

View full text Add to dashboard Cite

Summary:Plankton ecology has been the object of intense research and progress in the last few decades. This has been partly due to technological advances that have facilitated the multidisciplinary and high-resolution sampling of ecosystems and improved experimentation and analytical methodologies, and to sophisticated modelling. In addition, exceptional researchers have had the vision to integrate all these innovative tools to form a solid theoretical background in ecology. Here we provide an overview of the outstanding research work conducted by Professor Marta Estrada and her pioneering contribution to different areas of research in the last four decades. Her research in biological oceanography has mainly focussed on phytoplankton ecology, taxonomy and physiology, the functional structure of plankton communities, and physical and biological interactions in marine ecosystems. She has combined a variety of field and laboratory approaches and methodologies, from microscopy to satellite observations, including in-depth statistical data analysis and modelling. She has been a reference for scientists all over the world. Here, her contributions to plankton ecology are summarized by some of her students and closest collaborators, who had the privilege to share their science and everyday experiences with her.Keywords: phytoplankton ecology; taxonomy; functional structure of plankton communities; physical-biological interactions.La ecología del plancton en la oceanografía biológica: un homenaje a la labor de Marta Estrada Resumen: La ecología del plancton ha experimentado una intensa investigación y progreso en las últimas décadas. Esta se ha debido, en parte, a los avances tecnológicos que han facilitado la toma de muestras multidisciplinar y de alta resolución de los ecosistemas, la mejora de la experimentación y metodologías analíticas y el modelado matemático/numérico. El papel de investigadores excepcionales que han tenido la visión de integrar todas estas herramientas innovadoras a una sólida formación teórica en la ecología ha sido clave en este avance. A continuación hemos elaborado un resumen de la tarea de investigación llevada a cabo por la profesora Marta Estrada y su contribución pionera a diferentes áreas de investigación en las últimas cuatro décadas. Su investigación, en el marco de la oceanografía biológica, se ha centrado principalmente en la ecología del fitoplancton, su taxonomía y fisiología, la estructura funcional de las comunidades de plancton y las interacciones físicas y biológicas en los ecosistemas marinos. Ha combinado una variedad de enfoques y metodologías de campo y de laboratorio, desde observaciones por satélite, hasta el análisis en profundidad de datos estadísticos y el uso del modelado tanto analítico como numérico. La profesora Estrada ha sido una referencia para los científicos alrededor del mundo. Aquí, su contribución a la ecología del plancton la resumen algunos de sus alumnos y colaboradores más cercanos que han tenido el privilegio de compartir ciencia y vivencias con ella.Pa...

show abstract

Effects of pulsed nutrient enrichment on enclosed phytoplankton: ecophysiological and successional responses

Cited by 15 publications

References 35 publications

Dynamic forcing of coastal plankton by nutrient imbalances and match-mismatch between nutrients and turbulence

Dynamic forcing of coastal plankton by nutrient imbalances and match-mismatch between nutrients and turbulence

Interaction effects of N:P ratios and frequency of nutrient supply on the plankton community in the northern Baltic Sea

The ecology of plankton in biological oceanography: a tribute to Marta Estrada’s task

Contact Info

Product

Resources

About