College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China.
PeerJ. 2022 Nov 3;10:e14318. doi: 10.7717/peerj.14318. eCollection 2022.
The combination of submerged plants and snails can combat eutrophication of freshwater systems by suppressing algal growth and assimilating nutrients. By consuming epiphytes, snails can benefit the growth of submerged plants. However, the efficiency of this phytoremediation strategy may depend on the microbes associated with the plants and snails. In this study, we compared the epiphytic bacterial communities on submerged plants ( and ) and intestinal bacterial communities of a snail, found on these plants using 16S rRNA gene sequencing. Epiphytic bacterial communities were similar between the two plant species and snails shared a high proportion of snail intestinal bacterial OTUs (75%) and genera (85%) with plants they grazed on. However, significant variations of Bray-Curtis distances differentiated epiphytic and intestinal bacterial communities. In addition, between the top 50 genera shared by intestinal and epiphytic bacterial communities, more Spearman correlations were detected within bacterial communities associated with snails than between communities associated with plants (190 . 143), and the correlations in epiphytic bacterial networks were more concentrated on certain genera, indicating they possessed distinct bacterial networks. This suggests the bacterial communities associated with snails do not depend strongly on the plant they graze on, which may be important for better understanding the role of snails in aquatic eco-restoration.
水生植物与贝类的组合可以通过抑制藻类生长和吸收养分来对抗淡水系统的富营养化。贝类通过消耗附生生物可以促进水生植物的生长。然而，这种植物修复策略的效率可能取决于与植物和贝类相关的微生物。在这项研究中，我们比较了两种水生植物（ 和 ）上的附生细菌群落和在这些植物上发现的一种贝类（ ）的肠道细菌群落，使用 16S rRNA 基因测序。两种植物上的附生细菌群落相似，而贝类与它们食用的植物共享大量的肠道细菌 OTUs（75%）和属（85%）。然而，Bray-Curtis 距离的显著差异区分了附生和肠道细菌群落。此外，在肠道和附生细菌群落共有的前 50 个属中，与贝类相关的细菌群落之间的 Spearman 相关性检测到的更多（190 比 143），而与植物相关的细菌群落之间的相关性则更集中在某些属上，表明它们具有独特的细菌网络。这表明与贝类相关的细菌群落并不强烈依赖于它们食用的植物，这对于更好地理解贝类在水生生态恢复中的作用可能很重要。
