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首页> 美国卫生研究院文献>Ecology and Evolution >Soil physicochemical properties drive the variation in soil microbial communities along a forest successional series in a degraded wetland in northeastern China
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Soil physicochemical properties drive the variation in soil microbial communities along a forest successional series in a degraded wetland in northeastern China

机译：土壤物理化学特性驱动沿中国东北部退化湿地林中综合系列土壤微生物社区的变化

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摘要

The Sanjiang Plain is the biggest freshwater wetland locating in northeastern China. Due to climate change and human activities, that wetland has degraded to a successional gradient from the original flooded wetland to dry shrub vegetation and a forest area with lower ground water level, which may result in changes in soil microbiologic structure and functions. The present study investigated the microbial diversity and community structure in relation to soil properties along that successional gradient. The soil physico‐chemical properties changed significantly with degradation stage. The Shannon diversity index of both soil bacteria (5.90–6.42) and fungi (1.7–4.19) varied significantly with successional stage (both p < .05). The community structures of soil bacteria and fungi in the early successional stages (i.e., the wetland) were significantly determined by water content, total nitrogen, and available nitrogen concentrations in soils, while those in the later successional stages (i.e., forests) were significantly structured by soil organic carbon, soil pH, and available phosphorus concentrations. These results suggest that the soil microbial structure is mainly determined by soil properties rather than by plant community such as plant species composition along successional stages.
机译：三江平原是中国东北部门最大的淡水湿地。由于气候变化和人类的活动，湿地已经从原始洪水湿地降低了一系列渐变，以干燥灌木植被和具有较低地面水位的森林区域，这可能导致土壤微生物结构和功能的变化。本研究研究了与土壤性质相对于沿着该连续梯度的微生物多样性和群落结构。土壤物理化学性质随着降解阶段而变化显着变化。土壤细菌（5.90-6.42）和真菌（1.7-4.19）的香农分集指数随着连续阶段而显着变化（P <.05）。在早期连续阶段（即湿地）中的土壤细菌和真菌的社区结构被含水量，总氮和土壤中可用的氮浓度明显决定，而稍后的继承阶段（即森林）的含量显着由土壤有机碳，土壤pH和可用磷浓度构成。这些结果表明土壤微生物结构主要由土壤性质而不是沿着植物群落的土壤性质而不是沿着植物组合物的植物群落决定。

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