Margalef's mandala and phytoplankton bloom strategies

Wyatt, T.

doi:10.1016/j.dsr2.2012.12.006

Cited by 64 publications

(42 citation statements)

References 155 publications

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“…Referring to Margalef's mandala, Wyatt (2014) pointed out that "Like all useful models, the mandala excludes most of the detailed knowledge we possess about phytoplankton ecology". We consider conceptual models as scaffolds to structure our knowledge, with exceptions as challenges to existing ideas and opportunities for new discoveries.…”

Section: Results and Discusionmentioning

confidence: 99%

Influence of light and nutrients on the vertical distribution of marine phytoplankton groups in the deep chlorophyll maximum

Latasa¹,

Gutiérrez‐Rodríguez²,

Cabello³

et al. 2016

Sci. Mar.

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Summary: Ecological traits of phytoplankton are being incorporated into models to better understand the dynamics of marine ecosystems and to predict their response to global change. We have compared the distribution of major phytoplankton groups in two different systems: in surface waters of the NW Mediterranean during key ecological periods, and in the DCM (deep chlorophyll maximum) formed in summer in the temperate NE Atlantic. This comparison disentangled the influence of light and nutrients on the relative position of diatoms, dinoflagellates, prymnesiophytes, pelagophytes, chlorophytes, Synechococcus and Prochlorococcus in these environments. Three clusters formed according to their affinity for nutrients: diatoms, chlorophytes and dinoflagellates as the most eutrophic groups; Synechococcus, pelagophytes and prymnesiophytes as mesotrophic groups; and Prochlorococcus as an oligotrophic group. In terms of irradiance, the phytoplankton groups did not cluster clearly. Comparing the nutrient and light preferences of the groups with their distribution in the DCM, dinoflagellates and chlorophytes appear as the most stressed, i.e. their position was most distant from their optimal light and nutrient conditions. Diatoms stayed in deeper than optimal irradiance layers, probably to meet their high nutrient requirements. On the opposite side, low nutrient requirements allowed Prochlorococcus to remain in the uppermost part of the DCM layer. The slight sub-optimal position of Synechococcus and prymnesiophytes with regard to their nutrient requirements suggests that their need for high irradiance plays a significant role in their location within the DCM. Finally, pelagophytes remained in deep layers without an apparent need for the high nutrient concentrations at those depths.Keywords: marine phytoplankton groups; ecological traits; irradiance; nutrients; deep chlorophyll maximum.Influencia de la luz y los nutrientes en la distribución vertical de grupos de fitoplancton marino en el máximo profundo de clorofila Resumen: Las características ecológicas del fitoplancton se están incorporando en modelos con el fin de comprender mejor la dinámica de los ecosistemas marinos y para predecir su respuesta al cambio global. En este trabajo, hemos comparado la distribución de los principales grupos del fitoplancton en dos sistemas diferentes: en las aguas superficiales del Mediterrá-neo noroccidental durante períodos ecológicos clave, y en el Máximo Profundo de Clorofila (MPC) que se forma en verano en el Atlántico NE templado. Esta comparación permitió diferenciar la influencia de la luz y los nutrientes en la posición relativa de diatomeas, dinoflagelados, primnesiofitas, pelagofitas, clorofitas, Synechococcus y Prochlorococcus en estos ambientes. Se pudieron diferenciar tres agrupaciones de acuerdo con su afinidad por los nutrientes: diatomeas, clorofitas y dinoflagelados como los grupos más eutróficos; Synechococcus, pelagofitas y primnesiofitas como grupos mesotróficos; y Prochlorococcus como el grupo más oligotrófico. En térm...

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Section: Results and Discusionmentioning

confidence: 99%

Influence of light and nutrients on the vertical distribution of marine phytoplankton groups in the deep chlorophyll maximum

Latasa¹,

Gutiérrez‐Rodríguez²,

Cabello³

et al. 2016

Sci. Mar.

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“…Margalef's theory of ecological succession in phytoplankton can be completely applied to coastal ecosystems ( [61], the -Margalef's mandala‖ commented by Wyatt [62]). Phytoplankton assemblages in the MS are characterized by three annual succession phases that drive the pioneer winter populations to a final state by increasing the maturity of the system.…”

Section: Discussion-conclusionmentioning

confidence: 99%

Contrasting Patterns of Phytoplankton Assemblages in Two Coastal Ecosystems in Relation to Environmental Factors (Corsica, NW Mediterranean Sea)

et al. 2014

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Corsica Island is a sub-basin of the Northwestern Mediterranean Sea, with hydrological features typical of both oligotrophic systems and eutrophic coastal zones. Phytoplankton assemblages in two coastal ecosystems of Corsica (the deep Bay of Calvi and the shallow littoral of Bastia) show contrasting patterns over a one-year cycle. In order to determine what drives these variations, seasonal changes in littoral phytoplankton are considered together with environmental parameters. Our methodology combined a survey of the physico-chemical structure of the subsurface water with a characterization of the phytoplankton community structure. Sampling provided a detailed record of the seasonal changes and successions that occur in these two areas. Results showed that the two sampled stations presented different phytoplankton abundance and distribution patterns, notably during the winter-spring bloom period. Successions in pico-, nano-, and microphytoplankton communities appeared mainly driven by differences in the ability to acquire nutrients, and in community-specific growth rates. Phytoplankton structure and dynamics are discussed in relation to available data on the Northwestern Mediterranean OPEN ACCESS Diversity 2014, 6 297 Sea. These results confirm that integrated monitoring of coastal areas is a requisite for gaining a proper understanding of marine ecosystems.

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“…First, because Margalef's Mandala was conceived before the discovery of smaller-sized planktonic groups (i.e. picoplankton < 2 µm in diameter), it describes only the succession of vegetative phases of microphytoplankton (Wyatt 2014). Moreover, due to the methodological difficulties in quantifying mixing in the field, the validation of Margalef's model has so far been limited to studies where indirect estimates of nutrient supply were used.…”

Section: Introductionmentioning

confidence: 99%

“…A re-orientation of Margalef's first plot was presented a year later to accommodate alternative tracks in the main sequence that might result in red tide formation (Margalef et al 1979). A recent review of Margalef's model, including a discussion of its dynamic features and significance for blooms, has been provided by Wyatt (2014).…”

Section: Introductionmentioning

confidence: 99%

Nutrient supply controls picoplankton community structure during three contrasting seasons in the northwestern Mediterranean Sea

Mouriño‐Carballido

Hojas

Cermeño³

et al. 2016

Mar. Ecol. Prog. Ser.

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Margalef's mandala and phytoplankton bloom strategies

Cited by 64 publications

References 155 publications

Influence of light and nutrients on the vertical distribution of marine phytoplankton groups in the deep chlorophyll maximum

Influence of light and nutrients on the vertical distribution of marine phytoplankton groups in the deep chlorophyll maximum

Contrasting Patterns of Phytoplankton Assemblages in Two Coastal Ecosystems in Relation to Environmental Factors (Corsica, NW Mediterranean Sea)

Nutrient supply controls picoplankton community structure during three contrasting seasons in the northwestern Mediterranean Sea

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