Population Dynamics of Harmful Cyanobacteria

Huisman, Jef; Hulot, Florence D.

doi:10.1007/1-4020-3022-3_7

Cited by 84 publications

(53 citation statements)

References 116 publications

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“…If they are direct, our results suggest that regardless of the potentially low microcystin production, cyanobacteria may release microcystins at lower nitrogen and phosphorus concentrations. This would support by the hypothesis that microcystin is involved in nutrient competition in the phytoplankton community (Huisman and Hulot, 2005).…”

Section: Discussionsupporting

confidence: 60%

“…Both descriptors are important indicators for management. The competition with other phytoplankton, described by the cyanobacterial fraction in this study can affect the toxin production within a cell through allelopathy (Huisman and Hulot, 2005). Therefore, understanding the importance of site-specific drivers of both biomass and the cyanobacterial fraction is of highest importance to develop successful and sustainable management strategies.…”

Section: Discussionmentioning

confidence: 93%

“…In addition, microcystin production by cyanobacteria is a complex issue that might depend on their competition with other phytoplankton (e.g. Huisman and Hulot, 2005;Jang et al, 2006). From these earlier studies it can be concluded that the toxin concentration produced by a certain cyanobacterial biomass level might differ, depending on the level of competition (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Local nutrient regimes determine site-specific environmental triggers of cyanobacterial and microcystin variability in urban lakes

Sinang

Reichwaldt

Ghadouani

2015

Hydrol. Earth Syst. Sci.

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Abstract. Toxic cyanobacterial blooms in urban lakes present serious health hazards to humans and animals and require effective management strategies. Managing such blooms requires a sufficient understanding of the controlling environmental factors. A range of them has been proposed in the literature as potential triggers for cyanobacterial biomass development and cyanotoxin (e.g. microcystin) production in freshwater systems. However, the environmental triggers of cyanobacteria and microcystin variability remain a subject of debate due to contrasting findings. This issue has raised the question of whether the relevance of environmental triggers may depend on site-specific combinations of environmental factors. In this study, we investigated the site-specificity of environmental triggers for cyanobacterial bloom and microcystin dynamics in three urban lakes in Western Australia. Our study suggests that cyanobacterial biomass, cyanobacterial dominance and cyanobacterial microcystin content variability were significantly correlated to phosphorus and iron concentrations. However, the correlations were different between lakes, thus suggesting a sitespecific effect of these environmental factors. The discrepancies in the correlations could be explained by differences in local nutrient concentration. For instance, we found no correlation between cyanobacterial fraction and total phosphorous (TP) in the lake with the highest TP concentration, while correlations were significant and negative in the other two lakes. In addition, our study indicates that the difference of the correlation between total iron (TFe) and the cyanobacterial fraction between lakes might have been a consequence of differences in the cyanobacterial community structure, specifically the presence or absence of nitrogen-fixing species. In conclusion, our study suggests that identification of significant environmental factors under site-specific conditions is an important strategy to enhance successful outcomes in cyanobacterial bloom control measures.

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Section: Discussionsupporting

confidence: 60%

Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Local nutrient regimes determine site-specific environmental triggers of cyanobacterial and microcystin variability in urban lakes

Sinang

Reichwaldt

Ghadouani

2015

Hydrol. Earth Syst. Sci.

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“…In lakes, the key disaster of eutrophication is caused by the occurrence of cyanobacterial blooms. Such blooms are undesirable because cyanobacteria can be toxic to both aquatic organisms and human beings (Yin et al, 2005;Chen et al, 2009), and may cause hypoxia, and consequently disrupt food webs (Huisman et al, 2005). In China, events of algal blooms have frequently occurred in freshwater lakes, reservoirs, estuaries and coastal marine ecosystems during warm seasons.…”

Section: Introductionmentioning

confidence: 99%

Changes in physicochemical and biological factors during regime shifts in a restoration demonstration of macrophytes in a small hypereutrophic Chinese lake

Zhang

Liu

et al. 2010

Ecological Engineering

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“…Several findings regarding cyanobacterial population dynamics have been reported (Rojo and No.1 43 WANG et al: The decline process and major pathways of Microcystis bloom Cobelas, 1994;Huisman and Hulot, 2005). Although some studies have investigated the decline of Microcystis blooms, the pathways and the phases of these bloom collapses are still not fully understood.…”

Section: Discussionmentioning

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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Population Dynamics of Harmful Cyanobacteria

Cited by 84 publications

References 116 publications

Local nutrient regimes determine site-specific environmental triggers of cyanobacterial and microcystin variability in urban lakes

Local nutrient regimes determine site-specific environmental triggers of cyanobacterial and microcystin variability in urban lakes

Changes in physicochemical and biological factors during regime shifts in a restoration demonstration of macrophytes in a small hypereutrophic Chinese lake

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

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