Institute for Marine and Antarctic Studies (IMAS), Nubeena Crescent, Taroona, Tasmania 7053, Australia.
Institute for Marine and Antarctic Studies (IMAS), Nubeena Crescent, Taroona, Tasmania 7053, Australia.
Mar Pollut Bull. 2022 Sep;182:113957. doi: 10.1016/j.marpolbul.2022.113957. Epub 2022 Jul 22.
Finfish aquaculture is a fast-growing primary industry and is increasingly common in coastal ecosystems. Bacterioplankton is ubiquitous in marine environment and respond rapidly to environmental changes. Changes in bacterioplankton community are not well understood in semi-enclosed stratified embayments. This study aims to examine aquaculture effects in the composition and functional profiles of the bacterioplankton community using amplicon sequencing along a distance gradient from two finfish leases in a marine embayment. Results revealed natural stratification in bacterioplankton associated to NOx, conductivity, salinity, temperature and PO. Among the differentially abundant bacteria in leases, we found members associated with nutrient enrichment and aquaculture activities. Abundant predicted functions near leases were assigned to organic matter degradation, fermentation, and antibiotic resistance. This study provides a first effort to describe changes in the bacterioplankton community composition and function due to finfish aquaculture in a semi-enclosed and highly stratified embayment with a significant freshwater input.
鱼类养殖是一个快速发展的主要产业，在沿海生态系统中越来越普遍。海洋浮游细菌在海洋环境中无处不在，对环境变化迅速作出反应。在半封闭的分层港湾中，浮游细菌群落的变化还没有得到很好的理解。本研究旨在通过对一个海洋港湾中的两个鱼类养殖场的距离梯度进行扩增子测序，研究养殖活动对浮游细菌群落组成和功能特征的影响。结果表明，浮游细菌与 NOx、电导率、盐度、温度和 PO 有关，存在自然分层现象。在养殖场中，我们发现了与营养富集和水产养殖活动有关的细菌。在养殖场附近大量预测的功能与有机物降解、发酵和抗生素耐药性有关。本研究首次描述了在一个有大量淡水输入的半封闭、高度分层的港湾中，由于鱼类养殖，浮游细菌群落组成和功能的变化。
