Abstract
In the present study, a microcosm test was used to explore the effects of the zoobenthos on macrophyte allelopathy. Four representative zoobenthos showed low algal inhibition ranging within 0.05–0.16 in separate co-culture. When zoobenthos and tested microalgae were mixed completely, the inhibition rate was enhanced by 0.68. The inhibition potential followed the order: Corbicula fluminea > Palaemonetes sinensis > Chironomus plumosus > Limnodrilus hoffmeisteri. Furthermore, the benthic fauna significantly enhanced algal inhibition of the emergent plant Typha angustifolia and the submerged plant Potamogeton crispus by 0.43 and 0.32, respectively. Meanwhile, there was a significant difference in algal inhibition between five growth phases of macrophytes combined with zoobenthos community. In addition, a significant positive relationship occurred between the algal inhibition of allelopathic macrophytes and the mean individual biomass of the zoobenthos. Through the determination of physiological and biochemical traits of macrophytes, it was concluded that the zoobenthos would be a significant disturbance factor and induce strong stress-resistance response in macrophytes. Subsequently, the specific response will facilitate the algal inhibition of allelopathic macrophytes. Therefore, to keep a reasonable biodiversity will fully display strong function of the aquatic ecosystem and efficiently control harmful algal bloom.
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Acknowledgments
We thank Professor Q. Q. Ni for his useful comments and language editing, which have improved the manuscript greatly. Professor Y. L. Xi provided valuable assistance by identifying the zoobenthos types and the aquatic macrophyte. This study was supported by National Natural Science Fund of China (30900186), Natural Science Research Project of Anhui Province of China for Universities (KJ2015A122), Anhui Province and Ministry of Human Resources and Social Security of the People’s Republic of China (MOHRSS) for studying abroad.
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Zuo, S., Fang, Z., Zhou, S. et al. Benthic Fauna Promote Algicidal Effect of Allelopathic Macrophytes on Microcystis aeruginosa . J Plant Growth Regul 35, 646–654 (2016). https://doi.org/10.1007/s00344-015-9566-x
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DOI: https://doi.org/10.1007/s00344-015-9566-x