Rates of growth and microbial grazing mortality of phytoplankton in a recent artificial lake

Tadonléké, Rémy D.; Sime-Ngando, Télesphore

doi:10.3354/ame022301

Cited by 7 publications

(3 citation statements)

References 46 publications

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“…Diatoms were the only taxon grazed upon consistently throughout the study period, and small (<10 µm) diatoms appeared to be selectively consumed, as there was a significant negative correlation between grazing mortality rate and their relative abundance (Pearson's r = -0.25, p = 0.01). Microzooplankton have been observed to selectively consume small (< 25 µm) phytoplankton in a freshwater reservoir (Tadonléké & Sime-Ngando 2000). Moreover, diatoms can be high in nutritional value (Volkman et al 1989), while cyano bacteria have been recognized as a poor food source because their cell walls are resistant to digestion, they may contain toxins, and their filamentous colonies are difficult to graze upon (Allan 1995).…”

Section: Selective Microzooplankton Grazing On Cyanobacteria and Algaementioning

confidence: 99%

Microzooplankton grazing before, during and after a cyanobacterial bloom in Vancouver Lake, Washington, USA

Boyer¹,

Rollwagen‐Bollens²,

Bollens³

2011

Aquat. Microb. Ecol.

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Section: Selective Microzooplankton Grazing On Cyanobacteria and Algaementioning

confidence: 99%

Microzooplankton grazing before, during and after a cyanobacterial bloom in Vancouver Lake, Washington, USA

Boyer¹,

Rollwagen‐Bollens²,

Bollens³

2011

Aquat. Microb. Ecol.

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“…Large diatoms (.30 mm) typically dominate phytoplankton spring blooms due to their high ability to use winter nutrient stocks and increasing irradiance (Harris, 1978;Chang, 1980). The late spring collapse of the diatom bloom coincides with decreasing nutrient levels and is followed by a drastic shift in phytoplankton composition towards pico-and nanophytoplankton (Sin et al, 2000;Tadonléké & Sime-Ngando, 2000) and motile microphytoplankton cells (i.e. flagellates and dinoflagellates; Chang et al, 2003;Bode et al, 2005) which prevail during the summer.…”

Section: Introductionmentioning

confidence: 99%

Temporal patterns of phytoplankton assemblages, size spectra and diversity during the wane of aPhaeocystis globosaspring bloom in hydrologically contrasted coastal waters

et al. 2008

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The space-time dynamic of phytoplankton diversity and succession was investigated during the wane of a Phaeocystis globosa spring bloom in four distinct hydrological sub-systems of the eastern English Channel. Nutrients, chlorophyll-a concentrations, and phytoplankton composition, standing stocks, size spectra and diversity were monitored during three key periods in 2003: late spring, early summer and summer. Two consecutive diatom assemblages were observed, respectively dominated by: (i) small colonial species (,100 mm; Melosira sp., Diploneis sp. and Navicula transitans) in April; and (ii) large fine-walled cells (.200 mm; Guinardia striata and Rhizosolenia imbricata) in May and July. This shift in diatom composition appeared to be related to the potentially limitating silicic acid in early summer. Specific phytoplankton assemblages identified in distinct water masses have evolved from a mature/senescent community towards a relatively homogeneous aestival structure of dominant species that might have been triggered by the wane of the P. globosa bloom. Our results also identified a strong heterogeneity in the distribution of secondary species between distinct water masses during the summer period, suggesting that the magnitude of the observed patterns was intrinsically related to the hydrological properties prevailing in each sub-system. The identification of distinct temporal patterns in phytoplankton species diversity and succession following the wane of a spring bloom at relatively small spatial scales (i.e. ,10 km) is discussed in the framework of P. globosa blooms in particular and phytoplankton blooms in general and is suggested to have potentially strong consequences on food web dynamics and the carbon cycle in coastal ecosystems.

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“…To explore the temperature dependence of phytoplankton growth rates and zooplankton grazing rates in limnetic systems, we combined the results of our 16 experiments with 87 paired estimates of phytoplankton growth rates and zooplankton grazing rates reported by Boyer et al [15], Lavrentyev et al [16], Tadonleke and Sime-Ngando [17], Adrian et al [18], Griniene et al [19], Staniewski et al [20], Sterner et al [21], Tijdens et al [22], Twiss et al [23], Weisse et al [24], Davis et al [25], and Collos et al [26]. The principal difference between these earlier studies and ours was that the biomass of phytoplankton in University Lake was far above the range of concentrations within which the relationship between zooplankton grazing and phytoplankton biomass is linear.…”

Section: Resultsmentioning

confidence: 99%

Temperature Dependence of Freshwater Phytoplankton Growth Rates and Zooplankton Grazing Rates

Pulsifer

2021

Water

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Phytoplankton growth rates and zooplankton grazing rates were estimated on 16 occasions over a period of 17 months in University Lake, a highly eutrophic lake on the campus of Louisiana State University. Phytoplankton growth rates and chlorophyll a concentrations averaged 1.0 ± 0.2 d−1 and 240 ± 120 mg m−3, respectively. Chlorophyll a concentrations were at or above the inflection point of the Holling type I curve that described the relationship between zooplankton grazing rates and chlorophyll a concentrations. In most cases, it was necessary to dilute lake water by more than a factor of 4 before zooplankton grazing rates became sensitive to chlorophyll a concentrations. Chlorophyll a concentrations were positively correlated with temperature and were roughly fourfold higher at 30 °C than at 15 °C. An analysis of the temperature dependence of the growth rates and grazing rates in this study and 87 other paired estimates of limnetic phytoplankton growth rates and zooplankton grazing rates revealed virtually identical temperature dependences of growth rates and grazing rates that were very similar to the temperature dependence predicted by the metabolic theory of ecology. Phytoplankton growth rates exceeded zooplankton grazing rates by 0.13 ± 0.05 d−1 at all temperatures over a temperature range of 8.5–31.5 °C. The Q10 for both phytoplankton growth rates and zooplankton grazing rates was 1.5 over that temperature range.

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Rates of growth and microbial grazing mortality of phytoplankton in a recent artificial lake

Cited by 7 publications

References 46 publications

Microzooplankton grazing before, during and after a cyanobacterial bloom in Vancouver Lake, Washington, USA

Microzooplankton grazing before, during and after a cyanobacterial bloom in Vancouver Lake, Washington, USA

Temporal patterns of phytoplankton assemblages, size spectra and diversity during the wane of aPhaeocystis globosaspring bloom in hydrologically contrasted coastal waters

Temperature Dependence of Freshwater Phytoplankton Growth Rates and Zooplankton Grazing Rates

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