US EPA

2819786 

Journal Article 

Review 

A review of current knowledge on toxic benthic freshwater cyanobacteria--ecology, toxin production and risk management 

Quiblier, C; Wood, S; Echenique-Subiabre, I; Heath, M; Villeneuve, A; Humbert, JF 

2013 

1 

Water Research
ISSN: 0043-1354
EISSN: 1879-2448 

47 

15 

5464-5479 

English 

23891539 

10.1016/j.watres.2013.06.042 

WOS:000326212500002 

https://www.proquest.com/scholarly-journals/review-current-knowledge-on-toxic-benthic/docview/1435852283/se-2?accountid=171501
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Benthic cyanobacteria are found globally in plethora of environments. Although they have received less attention than their planktonic freshwater counterparts, it is now well established that they produce toxins and reports of their involvement in animal poisonings have increased markedly during the last decade. Most of the known cyanotoxins have been identified from benthic cyanobacteria including: the hepatotoxic microcystins, nodularins and cylindrospermopsins, the neurotoxic saxitoxins, anatoxin-a and homoanatoxin-a and dermatotoxins, such as lyngbyatoxin. In most countries, observations of toxic benthic cyanobacteria are fragmented, descriptive and in response to animal toxicosis events. Only a limited number of long-term studies have aimed to understand why benthic proliferations occur, and/or how toxin production is regulated. These studies have shown that benthic cyanobacterial blooms are commonly a mixture of toxic and non-toxic genotypes and that toxin concentrations can be highly variable spatially and temporally. Physiochemical parameters responsible for benthic proliferation vary among habitat type with physical disturbance (e.g., flow regimes, wave action) and nutrients commonly identified as important. As climatic conditions change and anthropogenic pressures on waterways increase, it seems likely that the prevalence of blooms of benthic cyanobacteria will increase. In this article we review current knowledge on benthic cyanobacteria: ecology, toxin-producing species, variables that regulate toxin production and bloom formation, their impact on aquatic and terrestrial organisms and current monitoring and management strategies. We suggest research needs that will assist in filling knowledge gaps and ultimately allow more robust monitoring and management protocols to be developed. 

Ecology; Monitoring; Risk assessment; Toxic benthic cyanobacteria; Toxin production; Aquatic organisms; Ecology; Monitoring; Risk assessment; Risk management; Water; Anthropogenic pressures; Benthic cyanobacteria; Cyanobacterial blooms; Physical disturbance; Physiochemical parameters; Terrestrial organisms; Toxin concentrations; Toxin production; Toxic materials; anatoxin a; cylindrospermopsin; fresh water; microcystin; saxitoxin; benthos; climate effect; concentration (composition); cyanobacterium; freshwater ecosystem; genotype; habitat type; nutrient; physicochemical property; risk assessment; toxin; aquatic species; biofilm; climate; cyanobacterium; ecology; genotype; habitat; lake; littoral; nonhuman; pond; priority journal; review; risk management; river; terrestrial species; waste water; wetland; Animalia; Cyanobacteria; Ecology; Monitoring; Risk assessment; Toxic benthic cyanobacteria; Toxin production; Bacterial Toxins; Cyanobacteria; Ecology; Fresh Water; Risk Management