The importance of bacteria in promoting algal growth in eutrophic lakes with limited available phosphorus

Zhao, Guoyan; Du, Jingjing; Jia, Yong; Lv, Yanna; Han, Guomin; Tian, Xingjun

doi:10.1016/j.ecoleng.2012.02.007

Cited by 70 publications

(30 citation statements)

References 26 publications

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“…After 7 days of cultivation, algal productivity was 4.8 and 3.4 times higher in the systems supplemented with bacteria. The stimulative effect of bacteria on algal growth has been described as being associated with bacteria mineralizing carbon (Ask et al, ; Muñoz and Guieysse, ), as well as cycling nutrients (Bloesch et al, ; Zhao et al, ) and generating vitamins (Grant et al, ) and other growth promoting regulators. Considering inorganic carbon limitation, this work focuses on bacterial stimulation via mineralizing photosynthetic end products.…”

Section: Resultsmentioning

confidence: 99%

“…Previous work has shown that the presence of bacteria may aid algal productivity (Andersen, ; Fukami et al, ; Riquelme et al, ; Suminto and Hirayama ). The stimulative effect of bacteria on algal growth has been described as being associated with bacteria mineralizing carbon (Ask et al, ; Muñoz and Guieysse, ), as well as cycling nutrients (Bloesch et al, ; Zhao et al, ) and generating vitamins (Grant et al, ) and other growth promoting regulators. Considering bacteria mineralizing carbon, this carbon cycling process has potential to help overcome carbon limitation in open algal culture systems.…”

Section: Introductionmentioning

confidence: 99%

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The contribution of bacteria to algal growth by carbon cycling

Bai

Lant

Pratt

2014

Biotech & Bioengineering

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Algal mass production in open systems is often limited by the availability of inorganic carbon substrate. In this paper, we evaluate how bacterial driven carbon cycling mitigates carbon limitation in open algal culture systems. The contribution of bacteria to carbon cycling was determined by quantifying algae growth with and without supplementation of bacteria. It was found that adding heterotrophic bacteria to an open algal culture dramatically enhanced algae productivity. Increases in algal productivity due to supplementation of bacteria of 4.8 and 3.4 times were observed in two batch tests operating at two different pH values over 7 days. A kinetic model is proposed which describes carbon limited algal growth, and how the limitation could be overcome by bacterial activity to re-mineralize photosynthetic end products.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The contribution of bacteria to algal growth by carbon cycling

Bai

Lant

Pratt

2014

Biotech & Bioengineering

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“…Also, a majority of strains, found in this study, lying in the Betaproteobacteria class encompassing a large number of known plant-symbiotic bacteria as legume-nodulation bacteria in general and Burkholderia in particular [40,46] may indicate the hypothesis of those to act as enhancers of the invasive potential. This order includes common endosymbionts classically associated to plants and algae [47,48,49] and known to include nitrogen-fixing and plant/algae growth enhancer endosymbionts [50]. …”

Section: Discussionmentioning

confidence: 99%

Invasion Is a Community Affair: Clandestine Followers in the Bacterial Community Associated to Green Algae, Caulerpa racemosa, Track the Invasion Source

et al. 2013

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Biological invasions rank amongst the most deleterious components of global change inducing alterations from genes to ecosystems. The genetic characteristics of introduced pools of individuals greatly influence the capacity of introduced species to establish and expand. The recently demonstrated heritability of microbial communities associated to individual genotypes of primary producers makes them a potentially essential element of the evolution and adaptability of their hosts. Here, we characterized the bacterial communities associated to native and non-native populations of the marine green macroalga Caulerpa racemosa through pyrosequencing, and explored their potential role on the strikingly invasive trajectory of their host in the Mediterranean. The similarity of endophytic bacterial communities from the native Australian range and several Mediterranean locations confirmed the origin of invasion and revealed distinct communities associated to a second Mediterranean variety of C . racemosa long reported in the Mediterranean. Comparative analysis of these two groups demonstrated the stability of the composition of bacterial communities through the successive steps of introduction and invasion and suggested the vertical transmission of some major bacterial OTUs. Indirect inferences on the taxonomic identity and associated metabolism of bacterial lineages showed a striking consistency with sediment upheaval conditions associated to the expansion of their invasive host and to the decline of native species. These results demonstrate that bacterial communities can be an effective tracer of the origin of invasion and support their potential role in their eukaryotic host’s adaptation to new environments. They put forward the critical need to consider the 'meta-organism' encompassing both the host and associated micro-organisms, to unravel the origins, causes and mechanisms underlying biological invasions.

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“…A substantial part can be adsorbed to the cell wall as mentioned in section 3.2 but algae can also utilize a subset of dissolved organic P (DOP) compounds by hydrolyzing them into dissolved inorganic phosphorus (DIP) with the alkaline enzyme phosphatase (APase) at P limitation (Cembella et al, 1984b;Wang et al, 2011). It is also possible that bacteria are breaking down DOP into DIP (Zhao et al, 2012), and the lowering in pH when diluting with effluent water may have released some metal complexes.…”

Section: Nutrient Removalmentioning

confidence: 98%