The relationships between nutrients, cyanobacterial toxins and the microbial community in Taihu (Lake Tai), China

Wilhelm, Steven W.; Farnsley, Sarah E.; LeCleir, Gary R.; Layton, Alice C.; Satchwell, Michael F.; DeBruyn, Jennifer M.; Boyer, Gregory L.; Zhu, Guangwei; Paerl, Hans W.

doi:10.1016/j.hal.2010.10.001

Cited by 140 publications

(95 citation statements)

References 52 publications

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“…Na levels and EC were only slightly higher in the summer bloom period (average [Na] = 28.2 p.p.m., average EC = 399 μS cm − 1 ) than in the autumn period (average [Na] = 18.9 p.p.m., average EC = 361 μS-cm − 1 ). Although it is unlikely that Na concentration was sufficient to suppress the growth of any cyanobacterial species, several studies have demonstrated a link between ionic flux and toxin production (Pomati et al, 2004;Wilhelm et al, 2011;Carneiro et al, 2013), presenting a credible route through which subtle changes in Na concentrations may influence, via secondary and tertiary mechanisms, the cyanobacterial and bacterial community composition Mou et al, 2013).…”

Section: Eubacterial Diversity and Compositionmentioning

confidence: 99%

“…Periods of high cyanobacterial biovolume are associated with elevated rates of denitrification (McCarthy et al, 2007) and carbon sequestration (Becker et al, 2011;Sandrini et al, 2014), applying additional perturbations to the water column that in turn contribute to already highly variable systems . Numerous studies have highlighted the diversity of heterotrophic groups that occur within microbial communities associated with freshwater bloomforming cyanobacteria species (Eiler and Bertilsson, 2004;Wu et al, 2007;Berg et al, 2008;Cheng et al, 2011;Dziallas and Grossart, 2011;Grossart et al, 2011;Wilhelm et al, 2011;Steffen et al, 2012;Woodhouse et al, 2012;Cai et al, 2013;Xing et al, 2013;Bagatini et al, 2014). Further, such studies have demonstrated that, for cyanobacterial-associated microbial communities, despite the identity of these communities being dependent on the cyanobacterial species present (Bagatini et al, 2014), water chemistry, temperature Xing et al, 2013) and ultimately the freshwater system within which the experiment is based, the function of these communities is largely conserved across local and continental spatial scales (Steffen et al, 2012;Penn et al, 2014;Steffen et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Microbial communities reflect temporal changes in cyanobacterial composition in a shallow ephemeral freshwater lake

et al. 2015

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The frequency of freshwater cyanobacterial blooms is at risk of increasing as a consequence of climate change and eutrophication of waterways. It is increasingly apparent that abiotic data are insufficient to explain variability within the cyanobacterial community, with biotic factors such as heterotrophic bacterioplankton, viruses and protists emerging as critical drivers. During the Australian summer of 2012-2013, a bloom that occurred in a shallow ephemeral lake over a 6-month period was comprised of 22 distinct cyanobacteria, including Microcystis, Dolichospermum, Oscillatoria and Sphaerospermopsis. Cyanobacterial cell densities, bacterial community composition and abiotic parameters were assessed over this period. Alpha-diversity indices and multivariate analysis were successful at differentiating three distinct bloom phases and the contribution of abiotic parameters to each. Network analysis, assessing correlations between biotic and abiotic variables, reproduced these phases and assessed the relative importance of both abiotic and biotic factors. Variables possessing elevated betweeness centrality included temperature, sodium and operational taxonomic units belonging to the phyla Verrucomicrobia, Planctomyces, Bacteroidetes and Actinobacteria. Species-specific associations between cyanobacteria and bacterioplankton, including the free-living Actinobacteria acI, Bacteroidetes, Betaproteobacteria and Verrucomicrobia, were also identified. We concluded that changes in the abundance and nature of freshwater cyanobacteria are associated with changes in the diversity and composition of lake bacterioplankton. Given this, an increase in the frequency of cyanobacteria blooms has the potential to alter nutrient cycling and contribute to long-term functional perturbation of freshwater systems.

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Section: Eubacterial Diversity and Compositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microbial communities reflect temporal changes in cyanobacterial composition in a shallow ephemeral freshwater lake

et al. 2015

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“…Negative impacts of bloom formation and collapse are well known on aquatic ecosystems, including high turbidity and shading the light needed by aquatic plants (Berger, 1989), changing physico-chemical factors (elevated pH and reduced CO 2 ), and producing toxins called microcystins (MCs) that affect the habitats of other biological communities (Kann and Smith, 1999;Hessen et al, 2005). Therefore, some studies have focused on different levels of aquatic organisms along with life cycle of Microcystis (Ke et al, 2008) and even the involved dynamics of the 'microbial loop' (Sommaruga, 1995) to postulate the possible relationship between cyanobacteria and community structure of bacteria and flagellates (Xing et al, 2007;Wilhelm et al, 2011). However, predicting the overall effects of blooms on ecosystem seems difficult.…”

Section: Introductionmentioning

confidence: 99%

Modelling ecosystem structure and trophic interactions in a typical cyanobacterial bloom-dominated shallow Lake Dianchi, China

Shan

Wang

et al. 2014

Ecological Modelling

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“…is commonly present on the shallow shore with a good transparency, while the bloom forming Microcystis sp. tends to occur at the surface of eutrophic water bodies (Wilhelm et al, 2011;Acuna et al, 2012). Thus, it is interesting why the two cyanobacteria with contradictory habitats grow in the deep Miyun Reservoir with a low nutrient level, and it is important to reveal the temporal and spatial variations of nutrients and phytoplankton community for establishing a strategy on controlling their growth.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal variations of two cyanobacteria in the mesotrophic Miyun reservoir, China

Pan

et al. 2014

Journal of Environmental Sciences

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a b s t r a c tSpatial variations in phytoplankton community within a large mesotrophic reservoir (Miyun reservoir, North China) were investigated in relation to variations in physico-chemical properties, nutrient concentrations, temperature and light conditions over a 5 month period in 2009. The dynamics of phytoplankton community was represented by the dominance of cyanobacteria through summer and fall, following with a short term dominance of chlorophyta in late fall, and a relatively high abundance of diatom in October; on the other hand, maximum phytoplankton biomass was recorded in the north shallow region of Miyun reservoir with a higher nutrients level. Particular attention was paid to the impacts of environmental conditions on the growth of two cyanobacteria genera, the toxin-producing Microcystis and the taste & odor-producing Oscillatoria. Microcystis biomass was in general greatly affected by water temperature and mixing depth/local water depth ratio in this reservoir, while the Oscillatoria biomass in the surface and middle layers was greatly affected by total dissolved phosphorus, and that in the bottom layer was related with the Secchi depth/local water depth ratio. Abundant Oscillatoria biomass was observed only in late September when Microcystis biomass decreased and allowed sufficient light go through.

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The relationships between nutrients, cyanobacterial toxins and the microbial community in Taihu (Lake Tai), China

Cited by 140 publications

References 52 publications

Microbial communities reflect temporal changes in cyanobacterial composition in a shallow ephemeral freshwater lake

Microbial communities reflect temporal changes in cyanobacterial composition in a shallow ephemeral freshwater lake

Modelling ecosystem structure and trophic interactions in a typical cyanobacterial bloom-dominated shallow Lake Dianchi, China

Spatial and temporal variations of two cyanobacteria in the mesotrophic Miyun reservoir, China

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