Loss processes in the population dynamics of phytoplankton maintained in closed systems

Reynolds, C. S.; Thompson, James M.; Ferguson, A.; Wiseman, Sheila W.

doi:10.1093/plankt/4.3.561

Cited by 122 publications

(49 citation statements)

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“…At these dates, high diatom densities were observed in the reservoir (Darchambeau and Thys 2005) and the zooplankton density was still low. A large fraction of these rapidly sinking algae (Reynolds and Wiseman 1982;Poister and Armstrong 2003) were probably ungrazed and sank. Previously presented artifacts might help explain why these export ratios are Ͼ1.…”

Section: Discussionmentioning

confidence: 99%

“…In lakes, the vertical flux of small particulate matter essentially comprises two components: the sinking of ungrazed phytoplankton cells (e.g., Reynolds et al 1982) and the sinking of the feces or fecal pellets of planktonic primary consumers (Sarnelle 1999). Both types of particles will settle from the upper layer below the thermocline if their sinking rates are higher than their mineralization rates.…”

Section: Introductionmentioning

confidence: 99%

“…These observations support the hypothesis that the regulation of elemental homeostasis in the herbivorous zooplankton consumers occurs at least partly at the assimilation/egestion level. Elements ingested in excess-P for the herbivorous copepods and N for many cladocerans-are concentrated into sinking feces, whereas the deficient elements are captured into biomass.In lakes, the vertical flux of small particulate matter essentially comprises two components: the sinking of ungrazed phytoplankton cells (e.g., Reynolds et al 1982) and the sinking of the feces or fecal pellets of planktonic primary consumers (Sarnelle 1999). Both types of particles will settle from the upper layer below the thermocline if their sinking rates are higher than their mineralization rates.…”

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confidence: 99%

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Influence of zooplankton stoichiometry on nutrient sedimentation in a lake system

Darchambeau

Thys²,

Leporcq

et al. 2005

Limnology & Oceanography

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We explored rates and stoichiometry (C : N : P ratios) of sinking particles in a temperate reservoir during a 2-yr period. Plankton was sampled weekly, and a sediment trap placed below the metalimnion collected sinking particles. There were no significant relationships between the stoichiometry of entrapped material and seston or zooplankton stoichiometry. However the differences in the entrapped C : P and N : P ratios between consecutive trap samplings were negatively correlated with the time variations of the zooplankton C : P and N : P ratios. Zooplankton C : P and N : P ratios were positively correlated with the percentage of copepod biomass in total zooplankton biomass Ͼ250 m and negatively correlated with the percentage of cladocerans. Zooplankton biomass Ͼ250 m reduced the fraction of N and P primary production lost to sinking (export ratio). The residuals of the N export ratio versus zooplankton biomass relationship were negatively correlated with the zooplankton N : P ratio, whereas there was a positive relationship with the residuals of the P export ratio relationship. These observations support the hypothesis that the regulation of elemental homeostasis in the herbivorous zooplankton consumers occurs at least partly at the assimilation/egestion level. Elements ingested in excess-P for the herbivorous copepods and N for many cladocerans-are concentrated into sinking feces, whereas the deficient elements are captured into biomass.In lakes, the vertical flux of small particulate matter essentially comprises two components: the sinking of ungrazed phytoplankton cells (e.g., Reynolds et al. 1982) and the sinking of the feces or fecal pellets of planktonic primary consumers (Sarnelle 1999). Both types of particles will settle from the upper layer below the thermocline if their sinking rates are higher than their mineralization rates. A simple heuristic model (Elser et al. 1995) explicitly represents the processes involved (Eq.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Influence of zooplankton stoichiometry on nutrient sedimentation in a lake system

Darchambeau

Thys²,

Leporcq

et al. 2005

Limnology & Oceanography

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“…This paper presents the results of a short laboratory study designed to test these various assumptions and, ultimately, the validity of the original model equation (2, above) of Reynolds et al (1982).…”

Section: Co= Ynomentioning

confidence: 99%

Cell- and colony-division inEudorina(Chlorophyta: Volvocales) and some ecological implications

Reynolds¹,

Rodgers²

1983

British Phycological Journal

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“…Preston et al (1980) and Brunberg and Blomqvist (2002) suggested that great quantities of Microcystis settled on the sediment surface to overwinter, and then devoted their germplasm resources toward a cyanobacterial bloom in the following year. Reynolds et al (1982) implied that the settling of Microcystis colonies toward the lake bottom constitutes a major pathway of their decline. However, there is a lack of a combined consideration of natural death, lysis of algal cells (Yoshida et al, 2006;Mayali and Azam, 2004) and other morphological changes of Microcystis colonial sizes.…”

Section: Introductionmentioning

confidence: 99%

The decline process and major pathways of Microcystis bloom in Taihu Lake, China

Wang

et al. 2012

Chin. J. Ocean. Limnol.

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Eutrophication has become a serious concern in many lakes, resulting in cyanobacterial blooms. However, the mechanism and pathways of cyanobacteria decline are less understood. To identify and define the growth and decline of Microcystis blooms in Taihu Lake of China, and to illuminate the destination of surface floating blooms, we investigated the biomass distribution and variations in colony size, morphology, and floating velocity from October 2008 to September 2009. The results showed that the Microcystis bloom declined in response to biomass decrease, colony disaggregation, buoyancy reduction, and increased phytoplankton biodiversity, and these indicative parameters could be applied for recognition of the development phases of the bloom. Three major decline pathways were proposed to describe the bloom decline process, colony disaggregation (Pathway I), colony settlement (Pathway II), and cell lysis in colonies (Pathway III). We proposed a strategy to define the occurrence and decline of Microcystis blooms, to evaluate the survival state under different stress conditions, and to indicate the efficiency of controlling countermeasures against algal blooms.

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Loss processes in the population dynamics of phytoplankton maintained in closed systems

Cited by 122 publications

References 0 publications

Influence of zooplankton stoichiometry on nutrient sedimentation in a lake system

Influence of zooplankton stoichiometry on nutrient sedimentation in a lake system

Cell- and colony-division inEudorina(Chlorophyta: Volvocales) and some ecological implications

The decline process and major pathways of Microcystis bloom in Taihu Lake, China

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