Substrate type and plant phenolics influence epiphytic bacterial assembly during short-term succession
Substrate type and plant phenolics influence epiphytic bacterial assembly during short-term succession
复制标题
基质类型和植物酚类物质影响短期演替期间附生细菌的组装
DOI：
10.1016/j.scitotenv.2021.148410
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发表时间：
2021-06-16
影响因子：
9.8
通讯作者：
Wu, Qinglong L.
中科院分区：
文献类型：
--
作者：
He, Dan;Zheng, Jiuwen;Wu, Qinglong L.
在自然生态系统中，大量的附生细菌生活在沉水植物或非生物基质的表面。尽管它对宿主植物的健康或水中的生态功能有很大贡献，但人们对附生细菌的时间动态和组装机制知之甚少。为了测试宿主植物化学是否会导致不同的群落动态，我们研究了两种沉水植物和一种非生物人造物质中附生细菌和周围水中浮游细菌的精细尺度时间群落演替。我们首先观察小空间（约 1 m x 1 m）中不同基质的差异化附生或周围水细菌群落。在高酚植物黑藻中，选择对附生细菌的组装起主导作用，而对于人工物质和低酚植物苦草来说，漂移和扩散驱动了附生细菌和浮游细菌的组装。更高的选择也可能导致浮游细菌和 H. verticillata 附生群落的更替率更高，后者在大约一周内发生巨大变化。 H. verticillata 中的附生细菌形成了更复杂的网络，具有更高比例的正向链接，这表明高酚植物的附生细菌群落中可能存在更强烈的相互作用，例如互利共生或促进作用。我们的结果还表明，对于用于生物净化的沉水植物，还可以考虑附生生物膜在净化相关功能中的动态。 (c) 2021 年由 Elsevier B.V. 出版
In natural ecosystems, large amounts of epiphytic bacteria live on the surfaces of submerged plants or non biological substrates. Although it contributes greatly to host plant health or ecological functions in waters, little is known about the temporal dynamics and assembly mechanisms of epiphytic bacteria. To test whether host plant chemistry leads to divergent community dynamics, we investigated the fine scale temporal community successions of both epiphytic bacteria and the bacterioplankton of the surrounding water in two submerged plants and one non-biological artificial substance. We first observed differentiated epiphytic or surrounding water bacterial communities for different substrates in small spaces (approximately 1 m x 1 m). Selection played dominant roles in affecting the assembly of epiphytic bacteria in the high-phenolic plant Hydrilla verticillata, while for the artificial substance and the low-phenolic plant Vallisneria natans, drift and dispersal drove the assembly of both epiphytic bacteria and bacterioplankton. The higher selection may also contribute to higher turnover rates in both bacterioplankton and epiphytic communities of H. verticillata, with the latter changing drastically in approximately one week. Epiphytic bacteria in H. verticillata developed more complex networks with a higher proportion of positive links, suggesting that more intense interactions such as mutualism or facilitation may exist within epiphytic bacterial communities of the high-phenolic plant. Our results also implied that for the submerged macrophytes used in biological purification, the dynamics of epiphytic biofilm in the purification-related functional capacities might also be considered. (c) 2021 Published by Elsevier B.V.