期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 55, 期 24, 页码 16538-16551出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.1c04742
关键词
Prymnesium parvum; harmful algal blooms; bloom microbiome; eutrophic lakes; fish kill; environmental viruses; prymnesin toxins
资金
- UK BBSRC Institute Strategic Program on Molecules from Nature. Products and Pathways [BBS/E/J/000PR9790]
- John Innes Foundation
- BBSRC CASE PhD studentship
- NERC Independent Research Fellowship [NE/L010771/2]
- Norwich Research Park Science Links Seed Fund [SLSF 32]
- Norwich Research Park DTP PhD Studentship
- Newton Fund Scholarship by the British Council [261863799]
- Newton Fund Scholarship by the Commission on Higher Education (CHED), Philippines [261863799]
- Natural Environmental Research Council [NE/S001352/1, NE/P012671/1]
- Earth and Life Systems Alliance, Norwich Research Park
- Environment Agency
- BBSRC [BBS/E/J/000PR9790] Funding Source: UKRI
- NERC [NE/L010771/2, NE/S001352/1, NE/P012671/1] Funding Source: UKRI
The research revealed that Prymnesium parvum microalgae causing harmful algal blooms in water bodies produces toxins affecting ecology and economy. The use of molecular techniques identified the presence of this microalgae in blooms causing fish kills in the UK, including detection of B-type prymnesin toxins for the first time in the area. The study suggested a correlation between blooms and rising temperatures, and demonstrated that low-dose hydrogen peroxide treatment is an effective strategy to control the spread of the algae blooms in enclosed water bodies.
Prymnesium parvum is a toxin-producing microalga, which causes harmful algal blooms globally, frequently leading to massive fish kills that have adverse ecological and economic implications for natural waterways and aquaculture alike. The dramatic effects observed on fish are thought to be due to algal polyether toxins, known as the prymnesins, but their lack of environmental detection has resulted in an uncertainty about the true ichthyotoxic agents. Using qPCR, we found elevated levels of P. parvum and its lytic virus, PpDNAV-BW1, in a fish-killing bloom on the Norfolk Broads, United Kingdom, in March 2015. We also detected, for the first time, the B-type prymnesin toxins in Broads waterway samples and gill tissue isolated from a dead fish taken from the study site. Furthermore, Norfolk Broads P. parvum isolates unambiguously produced B-type toxins in laboratory-grown cultures. A 2 year longitudinal study of the Broads study site showed P. parvum blooms to be correlated with increased temperature and that PpDNAV plays a significant role in P. parvum bloom demise. Finally, we used a field trial to show that treatment with low doses of hydrogen peroxide represents an effective strategy to mitigate blooms of P. parvum in enclosed water bodies.
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