Choi Ayeon, Lee Tae Kwon, Cho Hyeyoun, Lee Won-Chan, Hyun Jung-Ho
Department of Marine Science and Convergence Technology, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, South Korea; Marine Biotechnology Research Center, Korean Institute of Ocean Science & Technology (KIOST), 385 Haeyang-ro, Yeongdo-gu, Busan Metropolitan City, South Korea.
Department of Environmental Engineering, Yonsei University,1Yonseidae-gil, Wonju, Gangwon-do 26493, South Korea.
Mar Pollut Bull. 2022 May;178:113603. doi: 10.1016/j.marpolbul.2022.113603. Epub 2022 Apr 5.
To assess the aquaculture-induced sediment conditions associated with sulfur cycles, shifts in bacterial communities across farming stages were investigated. The sulfate reduction rate (SRR), and concentrations of acid volatile sulfide (AVS) and HS were significantly higher at the mid- and post-farming stages than at the early stage, indicating that the aquaculture effects persist even after harvest. Incomplete organic carbon-oxidizing sulfate-reducing bacteria (IO-SRB) affiliated with Desulfobulbaceae, and gammaproteobacterial sulfur oxidizing bacteria (SOB) (Thiohalobacter, Thioprofundum, and Thiohalomonas) were dominant during the early stage, whereas fermenting bacteria (Bacteroidetes and Firmicutes) and complete oxidizing SRB (CO-SRB) belonging to Desulfobacteraceae, and epsilonproteobacterial SOB (Sulfurovum) dominated during the mid- and post-stages. The shift in SRB and SOB communities well reflected the anoxic and sulfidic conditions of farm sediment. Especially, the Sulfurovum-like SOB correlated highly and positively with HS, AVS, and SRR, suggesting that they could be relevant microbiological proxies to assess sulfidic conditions in farm sediment.
为评估与硫循环相关的水产养殖引起的沉积物状况，研究了养殖各阶段细菌群落的变化。养殖中期和后期的硫酸盐还原率（SRR）、酸挥发性硫化物（AVS）和HS浓度显著高于早期，表明即使在收获后，水产养殖的影响仍然存在。与脱硫球菌科相关的不完全有机碳氧化硫酸盐还原菌（IO-SRB）和γ-变形菌纲硫氧化细菌（SOB）（硫卤杆菌属、深海硫杆菌属和硫卤单胞菌属）在早期占主导地位，而属于脱硫杆菌科的发酵细菌（拟杆菌门和厚壁菌门）和完全氧化硫酸盐还原菌（CO-SRB）以及ε-变形菌纲硫氧化细菌（硫卵菌属）在中期和后期占主导地位。硫酸盐还原菌和硫氧化细菌群落的变化很好地反映了养殖沉积物的缺氧和硫化条件。特别是，类似硫卵菌属的硫氧化细菌与HS、AVS和SRR高度正相关，表明它们可能是评估养殖沉积物中硫化条件的相关微生物指标。
