Your browser doesn't support javascript.
loading
Long-term stability of the genome structure of the cyanobacterium, Dolichospermum in a deep German lake.
Woodhouse, J N; Burford, M A; Neilan, B A; Jex, A; Tichkule, S; Sivonen, K; Fewer, D P; Grossart, H-P; Willis, A.
Afiliación
  • Woodhouse JN; Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), 16775 Stechlin, Germany.
  • Burford MA; Australian Rivers Institute, and School of Environment and Science, Griffith University, Brisbane, Australia.
  • Neilan BA; School of Environmental and Life Sciences, The University of Newcastle, Callaghan 2308, NSW, Australia.
  • Jex A; Population Health and Immunity, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, VIC, Australia.
  • Tichkule S; Population Health and Immunity, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia; Department of Medical Biology, University of Melbourne, Melbourne, Australia.
  • Sivonen K; Department of Microbiology, University of Helsinki, Viikinkaari 9, FI-00014 Helsinki, Finland.
  • Fewer DP; Department of Microbiology, University of Helsinki, Viikinkaari 9, FI-00014 Helsinki, Finland.
  • Grossart HP; Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), 16775 Stechlin, Germany; Department of Biochemistry and Biology, Potsdam University, 14469 Potsdam, Germany.
  • Willis A; Australian Rivers Institute, and School of Environment and Science, Griffith University, Brisbane, Australia. Electronic address: anusuya.willis@csiro.au.
Harmful Algae ; 133: 102600, 2024 03.
Article en En | MEDLINE | ID: mdl-38485438
ABSTRACT
Dolichospermum is a cyanobacterial genus commonly associated with toxic blooms in lakes and brackish water bodies worldwide, and is a long-term resident of Lake Stechlin, northeastern Germany. In recent decades, shifts in the phosphorus loading and phytoplankton species composition have seen increased biomass of Dolichospermum during summer blooms from 1998, peaking around 2005, and declining after 2020. Cyanobacteria are known to rapidly adapt to new environments, facilitated by genome adaptation. To investigate the changes in genomic features that may have occurred in Lake Stechlin Dolichospermum during this time of increased phosphorus loading and higher biomass, whole genome sequence analysis was performed on samples of ten akinetes isolated from ten, 1 cm segments of a sediment core, representing a ∼45-year period from 1970 to 2017. Comparison of these genomes with genomes of extant isolates revealed a clade of Dolichospermum that clustered with the ADA-6 genus complex, with remarkable genome stability, without gene gain or loss events in response to recent environmental changes. The genome characteristics indicate that this species is suited to a deep-chlorophyll maximum, including additional light-harvesting and phosphorus scavenging genes. Population SNP analysis revealed two sub-populations that shifted in dominance as the lake transitioned between oligotrophic and eutrophic conditions. Overall, the results show little change within the population, despite diversity between extant populations from different geographic locations and the in-lake changes in phosphorus concentrations.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Lagos / Cianobacterias Idioma: En Revista: Harmful Algae Año: 2024 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Lagos / Cianobacterias Idioma: En Revista: Harmful Algae Año: 2024 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Países Bajos