Influence of phosphorus availability on the community structure and physiology of cultured biofilms

Li, Shuangshuang; Wang, Chun; Qin, Hongjie; Li, Yinxia; Zheng, Jiaoli; Peng, Chengrong; Li, Dunhai

doi:10.1016/j.jes.2015.08.005

“…The aforementioned results, combined with the TP content resided in periphyton biofilms, may suggest that competition occurs between periphyton and planktonic algae, including cyanobacteria, for the phosphorus that algal cells require for growth. Some studies have shown that periphyton biofilms competed with planktonic algae for mutual resources, such as nutrients and space [45,46]. These results indicate the feasibility of the AAPs to reduce nutrient loads in water bodies and the phytoplankton biomass.…”

Section: Dynamics Of Phytoplankton In Water Column With the Developmementioning

confidence: 85%

Reducing the Phytoplankton Biomass to Promote the Growth of Submerged Macrophytes by Introducing Artificial Aquatic Plants in Shallow Eutrophic Waters

Wu

¹

,

Huang

²

,

Wang

³

et al. 2019

Water

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Harmful cyanobacterial blooms frequently occur in shallow eutrophic lakes and usually cause the decline of submerged vegetation. Therefore, artificial aquatic plants (AAPs) were introduced into enclosures in the eutrophic Dianchi Lake to investigate whether or not they could reduce cyanobacterial blooms and promote the growth of submerged macrophytes. On the 60th day after the AAPs were installed, the turbidity, total nitrogen (TN), total phosphorous (TP), and the cell density of phytoplankton (especially cyanobacteria) of the treated enclosures were significantly reduced as compared with the control enclosures. The adsorption and absorption of the subsequently formed periphyton biofilms attached to the AAPs effectively decreased nutrient levels in the water. Moreover, the microbial diversity and structure in the water changed with the development of periphyton biofilms, showing that the dominant planktonic algae shifted from Cyanophyta to Chlorophyta. The biodiversity of both planktonic and attached bacterial communities in the periphyton biofilm also gradually increased with time, and were higher than those of the control enclosures. The transplanted submerged macrophyte (Elodea nuttallii) in treated enclosures recovered effectively and reached 50% coverage in one month while those in the control enclosures failed to grow. The application of AAPs with incubated periphyton presents an environmentally-friendly and effective solution for reducing nutrients and controlling the biomass of phytoplankton, thereby promoting the restoration of submerged macrophytes in shallow eutrophic waters. co-precipitated phosphorus into the sediment [12]. Inorganic compounds in marl have been used to immobilize nutrients on the sediment surface, thus reducing nutrient concentrations in the water [13]. However, the aforementioned methodologies often have some effect on the original aquatic ecosystem, including changes in pH or salinity, which may threaten life in the lake [14]. Other measures have been applied to control the cyanobacterial blooms directly. Algaecides such as organic bromide, copper sulphate, and hydrogen peroxide have mostly been used to control large-scale cyanobacterial bloom as an emergency method, but these may result in an unsafe aquatic ecosystem and easily induce secondary pollution [15].Periphyton is an assemblage of freshwater organisms mainly composed of photoautotrophic algae, heterotrophic, and chemoautotrophic bacteria, fungi, protozoans, metazoans and viruses, which attach to submerged surfaces [16]. Periphyton plays a crucial role in nutrient cycling and in supporting food webs and it has an excellent ability to degrade pollutants in aquatic environments [17]. Previous studies have utilized biofilms to remove nitrogen and phosphorus from wastewater and to biodegrade other hazardous contaminants [18,19]. Moreover, microbial communities are easily incorporated into bioreactors, which result in efficient bioremediation operations [20]. Additionally, the microbial compositions of periphyton are derived fr...

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“…lipids, proteins, nucleic acids, etc. (Mahfoud et al, 2009;Wang et al, 2014;Li et al, 2016), microbial lyses products (Mahfoud et al, 2009), and/or particulates (Mahfoud et al, 2009). The EPS can also function as a matrix for storing water and chemicals while having the capability to sometimes protect the biofilm from poor environmental conditions and contaminants (Berner et al, 2015).…”

Section: Definition Of Aquatic Biofilmsmentioning

confidence: 99%

Field-based assessment of the influence of agriculture and urbanization on benthic macroinvertebrates in Southern Ontario and Laboratory based assessment of the toxicity of road salt to biofilms

Lucas¹

2022

Preprint

0

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The abundance and diversity of benthic macroinvertebrates (BMI) were measured across four streams that span a gradient of urban and agricultural land cover in south-central Ontario. For each stream, BMI surveys were carried out across three seasons for reference (upstream) and test (downstream) sites with chloride being a contaminant of interest to this study. While two of the test sites had stream chloride concentrations that exceeded national guidelines for chronic toxicity, only the site with the highest proportion of urban land cover in its drainage area suggested compromised community compositions across all study seasons. Additionally, the impact of sodium chloride, the most common road salt type, was studied on freshwater biofilm communities under laboratory conditions, where biofilms at high concentrations of salt show a high degree of aggregation.

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“…lipids, proteins, nucleic acids, etc. (Mahfoud et al, 2009;Wang et al, 2014;Li et al, 2016), microbial lyses products (Mahfoud et al, 2009), and/or particulates (Mahfoud et al, 2009). The EPS can also function as a matrix for storing water and chemicals while having the capability to sometimes protect the biofilm from poor environmental conditions and contaminants (Berner et al, 2015).…”

Section: Definition Of Aquatic Biofilmsmentioning

confidence: 99%

Field-based assessment of the influence of agriculture and urbanization on benthic macroinvertebrates in Southern Ontario and Laboratory based assessment of the toxicity of road salt to biofilms

Lucas¹

2022

Preprint

0

View full text Add to dashboard Cite

The abundance and diversity of benthic macroinvertebrates (BMI) were measured across four streams that span a gradient of urban and agricultural land cover in south-central Ontario. For each stream, BMI surveys were carried out across three seasons for reference (upstream) and test (downstream) sites with chloride being a contaminant of interest to this study. While two of the test sites had stream chloride concentrations that exceeded national guidelines for chronic toxicity, only the site with the highest proportion of urban land cover in its drainage area suggested compromised community compositions across all study seasons. Additionally, the impact of sodium chloride, the most common road salt type, was studied on freshwater biofilm communities under laboratory conditions, where biofilms at high concentrations of salt show a high degree of aggregation.

show abstract

Influence of phosphorus availability on the community structure and physiology of cultured biofilms

Cited by 16 publications

References 87 publications

Reducing the Phytoplankton Biomass to Promote the Growth of Submerged Macrophytes by Introducing Artificial Aquatic Plants in Shallow Eutrophic Waters

Reducing the Phytoplankton Biomass to Promote the Growth of Submerged Macrophytes by Introducing Artificial Aquatic Plants in Shallow Eutrophic Waters

Field-based assessment of the influence of agriculture and urbanization on benthic macroinvertebrates in Southern Ontario and Laboratory based assessment of the toxicity of road salt to biofilms

Field-based assessment of the influence of agriculture and urbanization on benthic macroinvertebrates in Southern Ontario and Laboratory based assessment of the toxicity of road salt to biofilms

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