Editorial: Environment-microbe-host interactions in aquaculture ecosystems

More importantly, the persistent presence of two probiotic species starting from the egg stage and the big change in microbial diversity on the weaning stage were detected by Almeida et al., suggesting that larval and weaning stages are two sensitive time windows for fish microbiome modulation, which may have long-lasting effect on the later life stages. Zhou et al. found that hypoxia increased the gill lamellae length and spacing and the gene expression related to lipid decomposition in liver of yellowtail kingfish (Seriola lalandi). [...]lower salinity changed the host microbiome and increased the abundance of potentially pathogenic genera (PPGs), such as Flavobacterium and Pseudomonas. Besides aforementioned environmental factors, different water treatment approaches, such as flow-through system (FTS) vs recirculating aquaculture system (RAS) (Attramadal et al., 2012) or supply of dissolved organic carbon substrates to mature the rearing water microbiome (Attramadal et al., 2016; Deng et al., 2022a), were found to have substantial impact on the microbial population in the water environment. [...]contributions to this Research Topic use 16S rRNA sequencing or transcriptomics to investigate the impact of age, oxygen, salinity, and water microbiome on not only development of host microbiome (including both potential probiotics and pathogens) but also on the morphology, histology and histopathology of host tissues.