Li Jinye, Chen Qingfeng, Li Qing, Zhao Changsheng, Feng You
Key Laboratory for Applied Technology of Sophisticated Analytical Instrument of Shandong Province, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, PR China.
Key Laboratory for Applied Technology of Sophisticated Analytical Instrument of Shandong Province, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, PR China; College of Geography and Environment, Shandong Normal University, Jinan, 250014, PR China.
Chemosphere. 2021 Jul;274:129967. doi: 10.1016/j.chemosphere.2021.129967. Epub 2021 Feb 15.
Microorganisms play an important role in the biogeochemical cycle and ecological function regulation of wetlands, have a major impact on global climate change and are critical for maintaining the health of the global ecosystem. In order to investigate the relationships among plants, environmental variables, and microbial communities in coastal wetlands in the Yellow River Delta, we selected soils growing plants such as Suaeda salsa, Tamarix chinensis, Phragmites australis, and cotton etc. The results show that there were differences in microbial diversity among areas with different vegetation cover and the microbial abundance in Phragmites australis and Tamarix chinensis areas was higher than that in mudflat, Suaeda glauca and cotton field, plants increased the diversity of soil microorganisms. The structure and diversity of soil microorganisms were significantly higher than that of endophytes. The Shannon index of soil bacteria was about 4-5.5, while that of endophytes was about 0-4. The soil bacteria were mainly Firmicutes, Proteobacteria, Bacteroidetes and Actinobacteria, accounting for more than 90.0% in all samples. The Mn, Fe and hydrolytic nitrogen contents in the soil of vegetation covered areas was lower than that of the bare beach, the content of hydrolytic nitrogen in Phragmites australis area was generally higher, and the content of SO and NO in the area was lowest near oil fields. Redundancy analysis shows that the explanatory rates of environmental factors at the phylum and genus levels were 89.70% and 86.80%, respectively, and K (23.40%), NO (11.80%), Mn (9.80%) and Na (8.00%) were the main factors explaining the structural changes and composition of microbial flora at the phylum level. This study provides an ecological perspective for understanding the influence mechanism between wetland microbial diversity and wetland ecosystem function. It is helpful for us to understand the interactions among plants, environmental variables, and microbial communities in the coastal wetland of the Yellow River Delta, and has important guiding significance for the scientific research of soil environmental remediation in the degraded coastal wetland of the Yellow River Delta.
微生物在湿地的生物地球化学循环和生态功能调节中发挥着重要作用，对全球气候变化有重大影响，对维持全球生态系统健康至关重要。为了研究黄河三角洲滨海湿地中植物、环境变量和微生物群落之间的关系，我们选取了生长有碱蓬、柽柳、芦苇和棉花等植物的土壤。结果表明，不同植被覆盖区域的微生物多样性存在差异，芦苇和柽柳区域的微生物丰度高于泥滩、灰绿碱蓬和棉田，植物增加了土壤微生物的多样性。土壤微生物的结构和多样性显著高于内生菌。土壤细菌的香农指数约为4 - 5.5，而内生菌的香农指数约为0 - 4。土壤细菌主要为厚壁菌门、变形菌门、拟杆菌门和放线菌门，在所有样本中占比超过90.0%。植被覆盖区域土壤中的锰、铁和水解氮含量低于裸滩，芦苇区域的水解氮含量普遍较高，油田附近区域的硫酸根和硝酸根含量最低。冗余分析表明，环境因子在门水平和属水平的解释率分别为89.70%和86.80%，钾（23.40%）、硝酸根（11.80%）、锰（9.80%）和钠（8.00%）是解释门水平微生物菌群结构变化和组成的主要因素。本研究为理解湿地微生物多样性与湿地生态系统功能之间的影响机制提供了生态学视角。有助于我们了解黄河三角洲滨海湿地中植物、环境变量和微生物群落之间的相互作用，对黄河三角洲退化滨海湿地土壤环境修复的科研工作具有重要指导意义。
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