Vertical and horizontal structure of the picophytoplankton community in a stratified coastal system off New Zealand

Hall, Julie; Vincent, Warwick F.

doi:10.1080/00288330.1994.9516617

Cited by 13 publications

(8 citation statements)

References 33 publications

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“…Average abundance values of PEUC in the northwest Mediterranean Sea (Vaulot and Partensky 1992) or north Adriatic Sea (Vanucci et al 1994) are 1 O-fold lower than in Thau Lagoon. A PROC : PEUC ratio of -1 has been reported only in upwelling areas or at times in estuarine areas, whereas large PROC : PEUC ratios are generally observed (Hall and Vincent 1990;Iriarte and Purdie 1994;Vanucci et al 1994). To date, little is known about the factors that can explain the dominance of picoplankton communities by eucaryotic species.…”

Section: Standing Stock and Dynamics Of Picophytoplankton In The Thaumentioning

confidence: 97%

“…Data from Vaulot and Partensky (1992) on spatial distribution of PEUC abundances also showed maxima in the vicinity of the Rhone River, which contributes large amounts of inorganic nutrients (Sayed et al 1994). A link between low PROC : PEUC ratios and high nitrate and phosphate concentrations was suggested by Hall and Vincent (1990). When compared with offshore waters of the Mediterranean Sea, N03-is the nutrient with the greatest increase in Thau Lagoon (Table 3).…”

Section: Standing Stock and Dynamics Of Picophytoplankton In The Thaumentioning

confidence: 99%

“…In offshore oceanic waters, procaryotic algae (cyanobacteria, prochlorophytes) have been generally found to outnumber eucaryotic picoplankters. To our knowledge, a significant contribution of eucaryotic cells to the picoplanktonic community has been reported only in the west coast upwelling region of South Island, New Zealand (Hall and Vincent 1990), and at times in estuarine areas (e.g. Iriarte and Purdie 1994).…”

Section: Standing Stock and Dynamics Of Picophytoplankton In The Thaumentioning

confidence: 99%

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Standing stock and dynamics of picophytoplankton in the Thau Lagoon (northwest Mediterranean coast)

Vaquer¹,

Troussellier²,

Courties³

et al. 1996

Limnology & Oceanography

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Eucaryotic picophytoplankton (PEUC), picocyanobacteria, and larger phytoplanktonic cells from the Thau Lagoon (northwest Mediterranean coast) were numbered by flow cytometry from November 1991 to February 1994. PEUC cells dominated the phytoplanktonic assemblage and exhibited seasonal dynamics. Monthly mean abundances of larger phytoplanktonic cell and PEUC were significantly correlated with temperature and solar irradiance values, with the highest correlations having been obtained for PEUC abundances. The mean abundance of total picophytoplankton (3.5 × 104 cells ml‒1) was among the highest recorded in marine waters. The dominance of picophytoplankton over larger phytoplanktonic cells (average abundance, 5 × 103 cells ml‒1) in the nutrient‐rich waters of the lagoon was related to grazing from large‐scale shellfish breeding (oyster’s ≈35,000 t), which seems to act preferentially on the largest cells. Several hypotheses, including the potential selective effect of copper, were proposed to explain the dominance of the PEUC form (average abundance, 3.4 × 104 cells ml‒1).

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Section: Standing Stock and Dynamics Of Picophytoplankton In The Thaumentioning

confidence: 97%

Section: Standing Stock and Dynamics Of Picophytoplankton In The Thaumentioning

confidence: 99%

Section: Standing Stock and Dynamics Of Picophytoplankton In The Thaumentioning

confidence: 99%

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Standing stock and dynamics of picophytoplankton in the Thau Lagoon (northwest Mediterranean coast)

Vaquer¹,

Troussellier²,

Courties³

et al. 1996

Limnology & Oceanography

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“…Picoplankton distribution and abundance can change dramatically depending on the interplay between biotic and abiotic factors (Weisse & Kenter 1991, Hall & Vincent 1994. The abundance of PP seems particularly controlled by nutrient availability (Stockner & Shortreed 1991), water temperature (Burns & Stockner 1991), and light conditions in the water column (Craig 1987, Pick & Agbeti 1991.…”

Section: Introductionmentioning

confidence: 99%

Picoplankton abundance and cytometric group diversity along a trophic and latitudinal lake gradient

Schiaffino¹,

Gasol²,

Izaguirre³

et al. 2013

Aquat. Microb. Ecol.

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The picoplankton (PP) is responsible for major ecosystem functions in most aquatic environments. However, not much is known about the factors that regulate its total abundance and community structure. Using flow cytometry (FC) to detect particles based on their pigments and nucleic-acid content, we described and quantified the photosynthetic pico plankton (PPP) and the heterotrophic bacterioplankton (HB) populations (or groups) composing PP in 32 water bodies located along a trophic and latitudinal gradient in the Argentinean Pata gonia to determine flowcytometrically defined community structures. We set out to identify the environmental variables regulating total PP abundance, group structure and cytometric diversity. We identified a total of 28 different cytometric populations within the HB, 14 of phycoerythrin (PE)-rich picocyanobacteria (Pcy), 8 of phycocyanin (PC)-rich Pcy, and 41 of picoeukaryotes (Peuk) in the different water bodies, with average 3.9 HB and 4.6 PPP groups per water body. We found a strong influence of environmental factors and a less marked effect of latitude on PP structure. HB and PPP abundances decreased towards higher latitudes but their cytometric diversity did not, whereas HB, PCrich Pcy and Peuk abundances together with PPP diversities increased with higher values of chlorophyll a (chl a). The relative contribution of PE-rich Pcy to total Pcy decreased with chl a, whereas the relative contribution of PC-rich Pcy and the number of PC-rich cytometric populations increased with chl a values. Peuk prevailed over Pcy with increasing trophic status and light attenuation, whereas HB prevailed over PPP with increasing trophic status.

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“…The larger proportion of picoplankton PN recorded in the 1989 summer compared with the two previous winters (Chang et al , 1992 might be attributed to a higher porportion of Synechococcus in the picoplanktonic assemblage, as higher concentrations of prokaryotic than eukaryotic cells had been observed in the 1989 summer off Westland (Hall & Vincent 1994).…”

Section: Hydrographic Properties and Biomassmentioning

confidence: 99%

Nitrogen uptake by the summer size‐fractionated phytoplankton assemblages in the Westland, New Zealand, upwelling system

Chang¹,

Bradford‐Grieve²,

Vincent³

et al. 1995

New Zealand Journal of Marine and Freshwater Research

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) contributed by all three size classes was higher inshore than offshore, and accounted for 40-61% and 19-29% of the total N production (ZpN), respectively. The reverse was true for regenerated production [ρ NH , and urea, and the half-saturation constants (K s ) of all three N nutrients for the three size classes in summer were higher than the respective ambient N concentrations. Low ambient dissolved nitrogenous nutrients (DNN), low dissolved reactive phosphate (DRP), and low V amb /V max ratios recorded in summer off Westland imply that the natural assemblages of phytoplankton, especially the larger components in inshore waters, were under nutrient stress.

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Vertical and horizontal structure of the picophytoplankton community in a stratified coastal system off New Zealand

Cited by 13 publications

References 33 publications

Standing stock and dynamics of picophytoplankton in the Thau Lagoon (northwest Mediterranean coast)

Standing stock and dynamics of picophytoplankton in the Thau Lagoon (northwest Mediterranean coast)

Picoplankton abundance and cytometric group diversity along a trophic and latitudinal lake gradient

Nitrogen uptake by the summer size‐fractionated phytoplankton assemblages in the Westland, New Zealand, upwelling system

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