Journal of Dalian Ocean University  2020, Vol. 35 Issue (2): 260-265 DOI: 10.16535/j.cnki.dlhyxb.2019-113 |
|
|
|
|
|
|
| Ecological effects of erythromycin thiocyanate on inhibiting cyanobacteria in situ |
| WANG Xueying1, BI Xiangdong1*, DONG Shaojie1, YOU Hongzheng2, LIU Keming2, DAI Wei1, LI Wanjin1
|
| 1.Key Laboratory of Aqua-ecology and Aquaculture of Tianjin, Department of Fisheries Sciences, Tianjin Agricultural University, Tianjin; 2.Tianjin Fisheries Research Institute, Tianjin |
|
|
|
Abstract Erythromycin thiocyanate was added into 15 cylindrical bottom sediment enclosures made of high density impermeable canvas and stainless steel iron frame in an circulating water channel with frequent cyanobacterial bloom outbreak at a dose of 0(control group), 0.25, 0.5, 1 mg/L and 2 mg/L for 10 days to clarify the dynamic changes in cyanobacteria and Microcysis abundance, microcystin(MCs)content in sediment and key hydrochemical indicators under the action of algaecide agent.The erythromycin thiocyanate was shown to have very strong inhibitory effect in cyanobacteria and Microcysis in the ecological enclosure, with inhibitory rate of 99% at the end of experiment.There was increase in content of microcystin in sedimentt first and then decrease under the action of erythromycin thiocyanate, with the maximum MC-RR content of 2.58 μg/g and MC-LR of 3.39 μg/g at the second 2 d.The increase in contents of  and CODMn was observed to some extent in a short time after emergency controlling of cyanobacteria bloom by erythromycin thiocyanate, especially the content of  and CODMn.Considering the algaecide effect, MCs storage in sediment and the change rule of key hydrochemical indices, it is recommend that erythromycin thiocyanate be applied at a dose of 0.25 mg/L to control cyanobacteria bloom in emergency, accompanied by operating aerators, and administration of probiotics in aquaculture.
|
|
Published: 07 April 2020
|
|
|
|
|
|
|
|
