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Environmental Science and Pollution Research

, Volume 26, Issue 15, pp 14977–14987 | Cite as

Effects of Bacillus subtilis on the growth, colony maintenance, and attached bacterial community composition of colonial cyanobacteria

  • Xiangdong BiEmail author
  • Wei Dai
  • Xueying Wang
  • Shaojie Dong
  • Shulin Zhang
  • Dajuan Zhang
  • Hongyue Shi
Research Article

Abstract

In freshwater aquaculture ponds, application of algicidal Bacillus is a promising way in the control of cyanobacterial blooms. To best understand Bacillus algicidal characters and mechanisms in the field, different-sized colonial cyanobacteria were isolated from an aquaculture pond, and the effects of B. subtilis on their growth, colony maintenance, and colony-attached bacterial community composition were investigated. The results showed that B. subtilis could inhibit the growth of colonial cyanobacteria. Bigger-sized colonies isolated from the field could spontaneously disintegrate into smaller-sized colonies in the laboratory. Algicidal B. subtilis could accelerate the disintegration of colonies and decrease colony size. B. subtilis not only decreased the colony-attached bacterial community diversity but also changed its composition. B. subtilis increased the relative abundances of some attached bacterial genera, including Pseudomonas, Shewanella, Bacillus, Shinella, Rhizobium, and Ensifer. These bacteria with algicidal, microcystin-degrading, and flocculating activities might be an important contributor to algicidal effects of B. subtilis on colonial cyanobacteria.

Keywords

Bacillus subtilis Colonial cyanobacteria Growth Colony maintenance Colony-attached bacteria Bacteria diversity 

Notes

Funding information

This study was financially supported by the National Natural Science Foundation of China (Grant No. 31772857 and 31640009), the Natural Science Foundation Grant of Tianjin (Grant Nos. 17JCYBJC29500 and 16JCYBJC29900), the Modern Aqua-ecology and Health Aquaculture Innovation Team of Tianjin (Grant No. TD-135089), and the Tianjin Agricultural University Key Laboratory of Aqua-ecology platform project (Grant No. 02).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory of Aquatic-Ecology and Aquaculture of Tianjin, Department of Fisheries SciencesTianjin Agricultural UniversityTianjinChina

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