Spatial distribution of phytoplankton assemblages in the Nazaré submarine canyon region (Portugal): HPLC-CHEMTAX approach

Mendes, Carlos; Sá, Carolina; Vitorino, J.; Borges, Carlos; Tavano, Virgínia Maria; Brotas, Vanda

doi:10.1016/j.jmarsys.2011.03.005

Cited by 42 publications

(17 citation statements)

References 38 publications

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“…The dominance of diatoms in spring with their positively correlated contribution to total Chl a and negative correlation with temperature corroborate the study by Loureiro et al (2011) who suggest that the dominance of diatoms is caused by the cold and nutrient rich water mass supplied by upwelling: other studies report the same trend based on the upwelling conditions along Portuguese coast (Moita, 2001;Silva et al, 2008;Mendes et al, 2011). Indeed, mesocosm experiments using waters from the Algarve coast showed that when primary production is stimulated, diatoms proved to be the class most sensitive to nutrient enrichment (Edwards et al, 2005;Loureiro et al, 2005bLoureiro et al, , 2008.…”

Section: Discussionsupporting

confidence: 86%

“…According to Loureiro et al (2011), the phytoplankton community at Sagres area has demonstrated nanoflagellate dominance, whereas in an earlier study which was limited to only the summer months, diatoms are clearly the prevalent community (Loureiro et al, 2005a). Several studies have documented this phenomenon as the typical succession pattern of phytoplankton in upwelling systems, whereby there is interchange between diatom domination with upwelling water, followed by flagellates as the upwelling relaxes and stratification occurs: the flagellates are better adapted to low-mixing conditions (Smith et al, 1983;Mann, 1993;Tilstone et al, 2000;Mendes et al, 2011). Most of these studies also note that fluctuations in nutrient regimes are related to this succession pattern, with phosphorus limitation favouring flagellate dominance.…”

Section: Discussionmentioning

confidence: 94%

“…Loureiro et al, 2005aLoureiro et al, , 2008Goela et al, 2013), 7 different phytoplankton classes were uploaded for an initial configuration of CHEMTAX: chrysophytes, cryptophytes, cyanobacteria, diatoms, dinoflagellates, prasinophytes and prymnesiophytes. Chlorophytes were excluded from this study to avoid confusion with prasinophytes on the basis of Mendes et al (2011) observations that the pigments shared between the two classes were significantly correlated with prasinoxanthin, which is an exclusive pigment from prasinophytes. The data matrix included concentrations of peridinin, 19 0 hexanoyloxifucoxanthin, fucoxanthin, 19 0 butanoyloxifucoxanthin, violaxanthin, alloxanthin, lutein, zeaxanthin, Chl b, Chl c3 and Chl a.…”

Section: Chemtax Designmentioning

confidence: 99%

“…Consequently, these pigments have not been processed by CHEMTAX for interannual and seasonal variations; despite this, they provide important additional information on which phytoplankton classes should be uploaded to the initial CHEMTAX configuration. For example, the chlorophytes class is excluded for the same reason mentioned in Mendes et al (2011), since the concentration of Pras, which is exclusively from prasinophytes, is highly correlated with …”

Section: Phytoplankton Pigments and Biomassmentioning

confidence: 99%

“…Eker-Develi et al, 2012), coastlines (e.g. Mendes et al, 2011) and in estuaries (e.g. Seoane et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Using CHEMTAX to evaluate seasonal and interannual dynamics of the phytoplankton community off the South-west coast of Portugal

Goela

Danchenko

Icely

et al. 2014

Estuarine, Coastal and Shelf Science

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a b s t r a c t CHEMTAX was used to assess the relative contribution of the main phytoplankton classes to the total concentration of Chlorophyll a (Chl a) from the waters off SW coast of Portugal. Sampling campaigns were carried out during all seasons from 2008 to 2012, at three stations located 2, 10 and 18 km from the coast. Samples were taken from the surface, mid-Secchi and Secchi depth, for the determination of Chl a and other phytoplanktonic pigments by HPLC. Supporting data were also obtained including dissolved inorganic nutrients, salinity, transparency, temperature and upwelling indices. The CHEMTAX results were also related to microscopy counts and also spectral analysis of absorption of other samples from the same sampling campaigns. The pigment results showed that diatoms dominated from early spring to summer, coinciding with upwelling conditions, while cryptophytes, prymnesiophytes and prasinophytes dominated in autumn and winter, coinciding with seasonal stratification. Although the contribution of cyanobacteria to total Chl a was generally low, there were occasional sampling campaigns where it was exceptionally high, but these appeared not to be related to upwelling. Dinoflagellates and chrysophytes were minority groups although the pigment marker peridinin that was used to distinguish dinoflagellates was not adequate for distinguishing all the members of this group. CHEMTAX was particularly useful for discriminating between the smaller (0e20 mm) classes of the microplankton that could not be easily identified by microscopy.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 94%

Section: Chemtax Designmentioning

confidence: 99%

Section: Phytoplankton Pigments and Biomassmentioning

confidence: 99%

“…Eker-Develi et al, 2012), coastlines (e.g. Mendes et al, 2011) and in estuaries (e.g. Seoane et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Using CHEMTAX to evaluate seasonal and interannual dynamics of the phytoplankton community off the South-west coast of Portugal

Goela

Danchenko

Icely

et al. 2014

Estuarine, Coastal and Shelf Science

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Dynamics of an intense diatom bloom in the Northern Antarctic Peninsula, February 2016

Costa

Mendes

Tavano

et al. 2020

Limnology & Oceanography

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Diatoms are considered the main base of the Southern Ocean food web as they are responsible for more than 85% of its annual primary production and play a crucial role in the Antarctic trophic structure and in the biogeochemical cycles. Within this context, an intense diatom bloom reaching > 45 mg m−3 of chlorophyll a was registered in the Northern Antarctic Peninsula (NAP) during a late summer study in February 2016. Given that nutrient concentrations and grazing activities were not identified here as limiting factors on the bloom development, the aim of this study was to evaluate the effect of water column structure (stability and upper mixed layer depth) on the phytoplankton biomass and composition in the NAP. The diatom bloom, mainly composed by the large centric Odontella weissflogii (mostly > 70 μm in length), was associated with a local ocean carbon dioxide uptake that reached values greater than −60 mmol m−2 d−1. We hypothesize that the presence of a vertically large water column stability barrier, just below the pycnocline, was the main driver allowing for the development of the intense diatom bloom, particularly in the Gerlache Strait. Contrarily, a shift from diatoms to dinoflagellates (mainly Gymnodiniales < 20 μm) was observed associated with conditions of a highly stable thin layer. The results suggest that a large fraction of this intense diatom bloom is in fast sinking process, associated with low grazing pressure, showing a crucial role of diatoms for the efficiency of the biological carbon pump in this region.

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Determination of the spatial and temporal variability of phytoplankton community structure in Daya Bay via HPLC-CHEMTAX pigment analysis

Wang

Huang

et al. 2018

J. Ocean. Limnol.

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Spatial distribution of phytoplankton assemblages in the Nazaré submarine canyon region (Portugal): HPLC-CHEMTAX approach

Cited by 42 publications

References 38 publications

Using CHEMTAX to evaluate seasonal and interannual dynamics of the phytoplankton community off the South-west coast of Portugal

Using CHEMTAX to evaluate seasonal and interannual dynamics of the phytoplankton community off the South-west coast of Portugal

Dynamics of an intense diatom bloom in the Northern Antarctic Peninsula, February 2016

Determination of the spatial and temporal variability of phytoplankton community structure in Daya Bay via HPLC-CHEMTAX pigment analysis

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