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International Journal of Fisheries and Aquatic Studies
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(ICV-Poland) Impact Value: 76.37, Impact Factor: RJIF 5.69
E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2016, Vol. 4, Issue 3, Part A

Defining the nitrogen fixation community size, structure and relevancy in Nile tilapia aquaculture pond waters


Author(s): Kamira Barry, Fan Li Min, Ji Li, Sun Bo, Li Zhi Bo, Song Chao, Shun Long Meng, Chen Jia Zhang

Abstract: Nitrogen fixation microbial communities within 3 different intensity Nile tilapia (Oreochromis niloticus) pond water columns were identified and correlated to environmental factors, influencing their summer pond productions in Yi Xing China. The microbial communities encoding the nifH - gene and known to promote plant growth, reduction of pond nitrate leaching and pollution were taxonomically identified to their most probable genera, revealing Azospirillum, Azoarcus, Anaeromyxobacter, Azotobacter, Geobacter, Trichormus, and unclassified_Opitutaceae, as the most dominant. Of the studied environmental factors, ammonium concentrations with the greatest influence on the communities recorded the highest significant differences of 3.18, 1.98 and 3.41 mg/L for the 3 studied ponds. The monthly mean temperatures, dissolved oxygen and pH values were documented and observed to be above pond culture optimal, while the chemical oxygen demand and total organic carbon nutrient content revealed an increment in energy sources within the pond systems. Quantitative analysis of the microbes encoding nifH gene abundances were established as 3.65 x 106, 2.66 x 106 and 3.11 x 106 copies/g wet weights in ponds 1, 2 and 3 respectively. Linear discriminant analysis effect size revealed Chromatiaceae and Thiocapsa as the closest relatives in the three ponds, while the Redundancy analysis tests indicated ammonia nitrogen, total phosphorous and dissolved Oxygen were the most important factors shaping the bacterial communities.

Related Graphics: Click here for more related graphics:

Phylum Distribution Bar graphs for monthly sampled microbial communities in Ponds 1, 2 and 3 of Yi Xing city, China
Fig. 1: Phylum Distribution Bar graphs for monthly sampled microbial communities in Ponds 1, 2 and 3 of Yi Xing city, China


Pages: 33-44  |  628 Views  39 Downloads

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How to cite this article:
Kamira Barry, Fan Li Min, Ji Li, Sun Bo, Li Zhi Bo, Song Chao, Shun Long Meng, Chen Jia Zhang. Defining the nitrogen fixation community size, structure and relevancy in Nile tilapia aquaculture pond waters. International Journal of Fisheries and Aquatic Studies. 2016; 4(3): 33-44.
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