Successional changes of microalgae community in response to commercial probiotics in the intensive shrimp (Litopenaeus vannamei Boone) culture systems
Successional changes of microalgae community in response to commercial probiotics in the intensive shrimp (Litopenaeus vannamei Boone) culture systems
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集约化虾（Litopenaeus vannamei Boone）养殖系统中微藻群落对商业益生菌的连续变化
DOI：
10.1016/j.aquaculture.2019.734257
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发表时间：
2019-09
期刊：
影响因子：
4.5
通讯作者：
Zheng Zhongming
中科院分区：
文献类型：
--
作者：
Lukwambe Betina;Nicholaus Regan;Zhang Demin;Yang Wen;Zhu Jinyong;Zheng Zhongming
具有抗菌特性的益生菌可用于调节水产养殖环境中的微生物区系，控制致病藻类，促进有机物的矿化。然而，益生菌对凡纳滨对虾养殖微藻演替的影响还不够充分。通过室内实验，研究了益生菌对微藻演替和对虾养殖系统营养强化的影响。微藻群落结构(MCSs)的巨大变化受到益生菌定植的显著影响。益生菌将MCSs分为三个系列阶段，并通过聚类分析确定了它们对优势类群的顺序替代。此外，MCSs中关键物种更替的每一系列阶段都代表着不同的生态功能。在最后的血清阶段，益生菌显着地抑制了最具竞争力的蓝藻物种(Oscillatoria和Anabaena)的演替，这与正常的血清阶段不同。同样，益生菌增加并维持了绿藻超微绿藻和绿藻绿藻绿藻以及硅藻卵囊和螺旋藻的营养价值。此外，与对照相比，添加益生菌的池塘对虾存活率更高。亚硝酸盐(NO_2、−)和硝酸盐(NO_3、−)浓度处理均低于对照。因此，化学需氧量、亚硝酸盐(NO2-−)、水温(WT)、总氨氮(TAN)和溶解氧(DO)是控制MCSs后遗症的有力解释变量。这些发现表明，益生菌在对虾养殖活动中对有益微藻的演替、再分配、抑制有害蓝藻的生长和维持微囊藻的稳定性具有潜在的作用。
Probiotics with antimicrobial properties can be used to regulate the microflora, control the pathogenic algae, and improve the mineralization of organic substances in the aquaculture environment. However, the efficacy of the probiotics on the succession of microalgae in the shrimp(Litopenaeus vannameiBoone) culture remains inadequate. A field experiment in mesocosm was performed to explore the impacts of probiotics on the succession of microalgae and nutrient enrichment of the shrimp culture systems. The enormous changes in the microalgae community structure (MCSs) was significantly influenced by probiotic colonization. Probiotics shifted MCSs into three seral phases and their sequential replacements of the dominant taxa were identified by cluster analysis. Moreover, each seral stage of the keystone species turnover in MCSs represents distinguished ecological functions. At the final seral stage probiotics significantly constrained the succession of the most competitive species of Cyanobacteria (OscillatoriaandAnabaena) which was disagreed with the normal seral stage. Similarly, the probiotics increased and maintained the sequel of the nutritional value ofNannochloropsisandChlorellafrom Chlorophyta andOocysticsandNaviculafrom the Bacillariophyta. Furthermore, the probiotic-based ponds had a higher shrimp survival rate compared to the control. Nutrients concentration of nitrite (NO2−) and nitrate (NO3−) were lower in treatments than in the control. Consequently, chemical oxygen demand (COD), nitrite (NO2−), water temperature (WT), total ammonium nitrogen (TAN) and dissolved oxygen (DO) were strongly explanatory variables controlled the sequel of MCSs. These findings imply that the probiotics have potential in the succession, redistribution of beneficial microalgae, inhibit the growth of harmful Cyanobacteria and sustain the MCSs stability in shrimp aquaculture activities.
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