铜绿微囊藻与拟新月藻和四尾栅藻的竞争及化感作用初探

doi:10.19640/j.cnki.jtau.2023.04.007

Journal of Tianjin Agricultural University ›› 2023, Vol. 30 ›› Issue (4): 32-38.doi: 10.19640/j.cnki.jtau.2023.04.007

• Researches and Scientific Notes • Previous Articles Next Articles

The competition and allelopathy of Microcystis aeruginosa with Cyanoidetes longissima and Scenedesmus quadricauda

Chen Xuan, Zhang Dajuan, Zhang Shulin, Wang Zebin, Dai Wei, Bi Xiangdong

Tianjin Key Laboratory of Aquatic Ecology and Aquaculture, College of Fisheries, Tianjin Agricultural University , Tianjin 300392, China

Received:2022-06-21 Online:2023-08-31 Published:2023-11-01

Abstract

Abstract: In order to study the competition and allelopathy among Microcystis aeruginosa, Closteriopsis longissima and Scenedesmus quadricauda, the growth parameters such as maximum environmental capacity（K）and growth rate（r）of three microalgae cultured individually and in combination were qualitatively analyzed by using the logistic equation. The competition inhibition parameters（α and β）among microalgae were further quantitatively compared by using the Lotka-Volterra competition model, and the effects of filtrate culture on the growth of the three microalgae and the maximum light energy conversion efficiency（Fv/Fm）of PSⅡ were preliminarily discussed by using filtrate culture. The results showed that the growth of M. aeruginosa was inhibited in the mixed culture, and the mixed culture of three algae had the strongest inhibition on the growth of M. aeruginosa. The inhibition of C. longissima on the growth of M. aeruginosa was stronger than that of S. quadricauda. In filtrate culture experiments, the filtrates of C. longissima and S. quadricauda showed obvious allelopathic inhibition on M. aeruginosa; The cell density and chlorophyll fluorescence parameter Fv/Fm of M. aeruginosa in the 100% filtrate group were under certain stress at the later stage of the experiment（P<0.05）. With the increase of concentration, the cell density and photosynthesis of M. aeruginosa in the filtrate were significantly inhibited and stressed（P<0.05）.

Key words: Microcystis aeruginosa, Closteriopsis longissima, Scenedesmus quadricauda, interspecific competition, allelopathy

CLC Number:

S917.1

Chen Xuan, Zhang Dajuan, Zhang Shulin, Wang Zebin, Dai Wei, Bi Xiangdong. The competition and allelopathy of Microcystis aeruginosa with Cyanoidetes longissima and Scenedesmus quadricauda[J]. Journal of Tianjin Agricultural University, 2023, 30(4): 32-38.

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The competition and allelopathy of Microcystis aeruginosa with Cyanoidetes longissima and Scenedesmus quadricauda

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