State Key Laboratory for Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory for Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Sci Total Environ. 2018 Jun 1;626:1261-1269. doi: 10.1016/j.scitotenv.2018.01.187. Epub 2018 Feb 19.
Earthworms play an important role in soil processes and functions. However, few studies have focused on their community patterns in perturbed systems, especially in an urban environment with a high turnover rate of land cover. In this study, we collected and identified the earthworms in the residential areas in metropolitan Beijing. We further investigated the effects of urban soil properties, urbanization and landscape patterns on the earthworm communities. The results showed that both the abundance and biomass of earthworms in residential areas in metropolitan was relatively low. The abundance of earthworms was negatively correlated with soil organic carbon (SOC) in this study. Soil moisture and pH could be considered as the most important edaphic variables that affected earthworm communities. The construction age of residential areas significantly influenced the earthworm abundance. Moreover, the earthworm community composition responded differently to urban landscape features at different scales. The percentage of impervious and green space surface, the amount of landscape cover types, patch density and landscape fragment significantly affected the earthworm assemblages. Our result discovered that the edaphic properties, urbanization as well as landscape patterns might be the potential factors that influenced the earthworm community patterns.
蚯蚓在土壤过程和功能中起着重要作用。然而，很少有研究关注受干扰系统中的蚯蚓群落模式，特别是在城市环境中，土地覆盖的周转率很高。在这项研究中，我们收集并鉴定了北京大都市住宅区的蚯蚓。我们进一步调查了城市土壤特性、城市化和景观格局对蚯蚓群落的影响。结果表明，大都市住宅区蚯蚓的丰度和生物量都相对较低。蚯蚓的丰度与土壤有机碳（SOC）呈负相关。在本研究中，土壤水分和 pH 值可以被认为是影响蚯蚓群落的最重要的土壤变量。住宅区的建设年代显著影响蚯蚓的丰度。此外，蚯蚓群落组成对不同尺度的城市景观特征的响应不同。不透水和绿地表面的百分比、景观覆盖类型的数量、斑块密度和景观片段对蚯蚓组合有显著影响。我们的结果发现，土壤特性、城市化以及景观格局可能是影响蚯蚓群落模式的潜在因素。
