Degradation of potassium rock by earthworms and responses of bacterial communities in its gut and surrounding substrates after being fed with mineral.
Degradation of potassium rock by earthworms and responses of bacterial communities in its gut and surrounding substrates after being fed with mineral.
复制标题
DOI：
10.1371/journal.pone.0028803
复制
发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Jiang G
中科院分区：
文献类型：
--
作者：
Liu D;Lian B;Wang B;Jiang G
蚯蚓是生态系统的工程师，对生态系统中广泛的营养循环和地球化学过程做出了贡献。它们的活动可以增加硅酸盐矿物风化的速率。蚯蚓的肠道微生物通常被认为是蚯蚓介导的矿物降解的关键驱动力之一，但与矿物风化相关的肠道微生物的分布尚不清楚。在这份报告中，我们显示了蚯蚓的硅酸盐矿物风化的影响和细菌群落的反应，在他们的肠道和周围的基板后，喂养含钾岩石粉（PBRP）。水溶性和HNO 3-可提取态元素的测定表明，蚯蚓消化后矿物中的Al、Fe和Ca等元素有明显的释放。采用扩增核糖体DNA限制性分析（ARP-RFLP）对蚯蚓肠道及周围基质中的微生物群落进行了研究，结果表明，饲喂PBRP的蚯蚓肠道及饲喂PBRP后的蚯蚓肠道中细菌多样性均较高。UPGMA树状图与未加权的UniFrac分析，仅考虑存在的分类群，揭示了蚯蚓的肠道及其周围基质共享相似的微生物群。UPGMA聚类分析表明，两种基质样品和两种蚯蚓消化道样品的微生物群落结构相似。结果表明，蚯蚓对硅酸盐矿物具有加速降解作用，蚯蚓不仅对土壤结构有一定的影响，而且通过促进矿物的风化作用，促进生态系统养分循环，在生态系统过程中发挥着重要作用。
Earthworms are an ecosystem's engineers, contributing to a wide range of nutrient cycling and geochemical processes in the ecosystem. Their activities can increase rates of silicate mineral weathering. Their intestinal microbes usually are thought to be one of the key drivers of mineral degradation mediated by earthworms,but the diversities of the intestinal microorganisms which were relevant with mineral weathering are unclear. In this report, we show earthworms' effect on silicate mineral weathering and the responses of bacterial communities in their gut and surrounding substrates after being fed with potassium-bearing rock powder (PBRP). Determination of water-soluble and HNO3-extractable elements indicated some elements such as Al, Fe and Ca were significantly released from mineral upon the digestion of earthworms. The microbial communities in earthworms' gut and the surrounding substrates were investigated by amplified ribosomal DNA restriction analysis (ARDRA) and the results showed a higher bacterial diversity in the guts of the earthworms fed with PBRP and the PBRP after being fed to earthworms. UPGMA dendrogram with unweighted UniFrac analysis, considering only taxa that are present, revealed that earthworms' gut and their surrounding substrate shared similar microbiota. UPGMA dendrogram with weighted UniFrac, considering the relative abundance of microbial lineages, showed the two samples from surrounding substrate and the two samples from earthworms' gut had similarity in microbial community, respectively. Our results indicated earthworms can accelerate degradation of silicate mineral. Earthworms play an important role in ecosystem processe since they not only have some positive effects on soil structure, but also promote nutrient cycling of ecosystem by enhancing the weathering of minerals.
登录
查看更多内容
影响因子：
4.9
作者：
Basak, B. B.;Biswas, D. R.
通讯作者：
Biswas, D. R.
影响因子：
1.9
作者：
Knapp, B. A.;Seeber, J.;Insam, H.
通讯作者：
Insam, H.
影响因子：
6.1
作者：
Hosseinifard, Seyed Javad;Khademi, Hossein;Kalbasi, Mahmoud
通讯作者：
Kalbasi, Mahmoud
影响因子：
4.4
作者：
Mathur, Jayanti;Bizzoco, Richard W.;Kelley, Scott T.
通讯作者：
Kelley, Scott T.
影响因子：
5.8
作者：
Larkin, M. A.;Blackshields, G.;Higgins, D. G.
通讯作者：
Higgins, D. G.