Response of microbial communities to bioturbation by artificially introducing macrobenthos to mudflat sediments for in situ bioremediation in a typical semi-enclosed bay, southeast China

Microeukaryotic Community Structure and Dynamics During Macrobenthos Bioremediation in Intertidal Mudflat Sediments of Sansha Bay, China

“…Previous studies also showed that macrobenthos abundance significantly influence the ammonia-oxidizing bacterial diversity of β-Proteobacteria (15), as well as the release and distribution of PAHs (16), and promote the growth of bacteria, which might participate in the oil degradation processes (17)(18)(19). Our previous studies also showed that the macrobenthos (Nereids and Bivalves) bioturbation enhanced the diversity of archaea and stimulated the growth of ecologically important groups of bacteria and archaea (20,21).…”

Shifts in the Community Dynamics and Activity of Ammonia‐Oxidizing Prokaryotes Along the Yangtze Estuarine Salinity Gradient

“…These OTUs were mainly affiliated to Nitrosopumilus (approximately 57% of sequences), Nitrososphaera (approximately 10% of sequences), and Nitrosotenuis (approximately 10% of sequences) lineage. The other two clusters fell into uncultured cluster comprised of marine/estuary sediment clones from the Yangtze Estuary, East China Sea, and intertidal mudflat (Y. Y. Li et al, ; Ma et al, ; Pester et al, ; Yu et al, ; Zheng et al, ). Nitrosopumilus ‐like sequences were amplified in all samples (Figure ).…”

Bioturbation of peanut worms Sipunculus nudus on the composition of prokaryotic communities in a tidal flat as revealed by 16S rRNA gene sequences

“…In the present study, Proteobacteria was also the most dominant phylum (Figure a), and a similar situation was found in other studies (Andrei et al, ; Ma et al, ; Shen et al, ; Zhang, Hu, Ren, & Zhang, ; Zhu, Wang, Zhang, Zhu, & Zou, ). However, the total number of bacterial phyla was similar to that in sandy tidal flat (18 phyla), wetland (20 phyla) and early biofilms (11 phyla) (Peng, Li, Lu, Xiao, & Yang, ; Shen et al, ; Zhu et al, ), but less than that in mudflats (53), hypersaline sapropels (59 phyla) and mangrove mudflats (57 phyla) (Ma et al, ; Andrei et al, ; Zhang, Hu, Ren, & Zhang, ), most likely because of the differences in the physicochemical properties and disturbances in the environments. The main reason for these relationships might also be that the organic matter content was lower, and the oxygen content was higher in the sandy tidal flat than in the other mudflat habitats.…”

“…The S. nudus has a clear ecological function of transporting organic matter from the surface layer into the bottom sediments (Li, Zhu, Guo, Xie, Huang et al, ), and plays an important role in the transfer of organic matter and bacterial communities in the sediment. Previous studies found that the relative abundances of the genera Propionigenium of Fusobacteria, Fusibacter of Firmicutes, Spirochaeta of Spirochaetes, Desulfococcus of Deltaproteobacteria, and Nitrospirae LCP ‐6 are increased by the bioturbation of the macrobenthos in mudflat sediments (Ma et al, ) and that the abundance of bacteria was greater in burrows than in oxygen‐poor sediments (Papaspyrou et al, ). Proteobacterieae includes alpha‐, beta‐, delta‐, and gamma‐proteobacteria, and many kinds of microbes play an important role in sulfate‐reducing or nitrogen‐fixing (Ma et al, ).…”

“…The bacterial community and activity depend on organic content, distribution, feeding habits, and excreta of macrobenthos (Kristensen & Kostka, ). A previous study shows that the relative abundance of the genera Propionigenium of Fusobacteria, Fusibacter of Firmicutes, Spirochaeta of Spirochaetes, Desulfococcus of Deltaproteobacteria, and Nitrospirae LCP ‐6 increased by the bioturbation of macrobenthos in mudflat sediments (Ma et al, ), and the abundance of bacteria was greater in burrow sediments than in non‐burrow sediments (Papaspyrou, Gregersen, Cox, Thessalou‐Legaki, & Kristensen, ). The abundance of Acidobacteria, Actinobacteria, Nitrospirae, and some other bacterial phyla can be influenced by the bioturbation of Meretrix meretrix and Perinereis aibuhitensis , dissolved oxygen and total dissolved inorganic nitrogen in sandy sediments (Shen et al, ), and the abundance of nitrogen‐cycling functional genes can be directly influenced by the bioturbation of Upogebia deltaura in coastal sediments (Laverock et al, ).…”