Application of biodegradable polymers as carbon sources in ex situ biofloc systems: Water quality and shift of microbial community

2021 ◽  
Author(s):  
Natalee Kokkuar ◽  
Li Li ◽  
Prapansak Srisapoome ◽  
Shuanglin Dong ◽  
Xiangli Tian
Keyword(s):  
Water Quality ◽  
Microbial Community ◽  
Biodegradable Polymers ◽  
Carbon Sources ◽  
Ex Situ

scholarly journals The Effects of Different Carbon Sources on the Production Environment and Breeding Parameters of Litopenaeus vannamei

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3584
Author(s):  
Yiming Xue ◽  
Li Li ◽  
Shuanglin Dong ◽  
Qinfeng Gao ◽  
Xiangli Tian
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Microbial Community ◽  
Litopenaeus Vannamei ◽  
Carbon Sources ◽  
Ammonia Removal ◽  
Total Alkalinity ◽  
Production Environment ◽  
Microbial Composition ◽  
Linear Discriminant

This study investigated the effect of different carbon sources on water quality, ammonia removal pathways, the bacterial community, and the production of Litopenaeus vannamei in outdoor culture tanks. Three systems were established: a clear water system (CW) and biofloc technology (BFT) systems with added molasses (M-BF) or poly (3-hydroxybutyric acid-co-3-hydrovaleric acid) (PHBV) (P-BF). The average pH, total alkalinity, total organic carbon, biofloc volume, chlorophyll a, nitrite, nitrate, total nitrogen, and nitrification rate were significantly different among the treatments. Microbial composition varied and different dominant taxa were identified in the treatments by linear discriminant analysis effect size. Redundancy analysis indicated that the water quality parameters affected the distribution of the microbial community. Moreover, the genus Leucothrix was closely related to the M-BF treatment. Chemoheterotrophy and aerobic chemoheterotrophy were the most abundant functions in all treatments. A comparison of functions using BugBase indicated that the relative abundance of several functions such as biofilm formation, stress tolerance and functions related to anaerobic processes increased in the M-BF treatment. The specific growth rate, growth rate, and survival rate of shrimp were significantly higher in the P-BF system than in the CW system and the feed conversion ratio in the BFT treatments was significantly lower than that in the CW system. Overall, adding carbon sources affected water quality, microbial community, and shrimp performance. The results show that PHBV is a good alternative to carbon sources.

The effect of different carbon sources on water quality, microbial community and structure of biofloc systems

Aquaculture ◽  
2018 ◽  
Vol 482 ◽  
pp. 103-110 ◽  
Author(s):  
Min Deng ◽  
Jieyu Chen ◽  
Jingwei Gou ◽  
Jie Hou ◽  
Dapeng Li ◽  
...  
Keyword(s):  
Water Quality ◽  
Microbial Community ◽  
Carbon Sources

Replicating the microbial community and water quality performance of full-scale slow sand filters in laboratory-scale filters

2014 ◽  
Vol 61 ◽  
pp. 141-151 ◽  
Author(s):  
Sarah-Jane Haig ◽  
Christopher Quince ◽  
Robert L. Davies ◽  
Caetano C. Dorea ◽  
Gavin Collins
Keyword(s):  
Water Quality ◽  
Microbial Community ◽  
Full Scale ◽  
Laboratory Scale ◽  
Sand Filters ◽  
Quality Performance

scholarly journals Emergent Simplicity in Microbial Community Assembly

2017 ◽  
Author(s):  
Joshua E. Goldford ◽  
Nanxi Lu ◽  
Djordje Bajic ◽  
Sylvie Estrela ◽  
Mikhail Tikhonov ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Community Assembly ◽  
Competitive Exclusion ◽  
Ex Situ ◽  
Coarse Grained ◽  
Natural Environments ◽  
Complex Dynamic ◽  
Microbial Community Assembly ◽  
Consumer Resource

AbstractMicrobes assemble into complex, dynamic, and species-rich communities that play critical roles in human health and in the environment. The complexity of natural environments and the large number of niches present in most habitats are often invoked to explain the maintenance of microbial diversity in the presence of competitive exclusion. Here we show that soil and plant-associated microbiota, cultivated ex situ in minimal synthetic environments with a single supplied source of carbon, universally re-assemble into large and dynamically stable communities with strikingly predictable coarse-grained taxonomic and functional compositions. We find that generic, non-specific metabolic cross-feeding leads to the assembly of dense facilitation networks that enable the coexistence of multiple competitors for the supplied carbon source. The inclusion of universal and non-specific cross-feeding in ecological consumer-resource models is sufficient to explain our observations, and predicts a simple determinism in community structure, a property reflected in our experiments.

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