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Rain gardens enhance the taxonomic richness but not the abundance of soil invertebrates in urban ecosystems
Ecological Engineering ( IF 3.8 ) Pub Date : 2024-03-30 , DOI: 10.1016/j.ecoleng.2024.107244 Jingjing Wang , Lihao Guo , Saige Xu , Yan Zhu , Lingfeng Mao
Ecological Engineering ( IF 3.8 ) Pub Date : 2024-03-30 , DOI: 10.1016/j.ecoleng.2024.107244 Jingjing Wang , Lihao Guo , Saige Xu , Yan Zhu , Lingfeng Mao
Natural treatment systems such as rain gardens aim to overcome the negative effects of urban stormwater, preventing harm to human population and infrastructure. Rain gardens house an abundance of soil fauna comprising a functionally important group of organisms. However, the responses of different groups of soil fauna to rain gardens remain poorly explored. In this study, we investigated the abundance, taxonomic richness, taxonomic diversity, and community composition of ground-dwelling and belowground invertebrates in rain gardens and nearby lawns in Nanjing and Zhenjiang cities, China. In Nanjing, we found that the taxonomic richness of ground-dwelling and belowground invertebrates was significantly higher in rain gardens than in lawns. We also discovered that the community composition of ground-dwelling invertebrates differed significantly between rain gardens and lawns, a distinction primarily explained by gravel coverage. However, in Zhenjiang, there were no significant differences in the abundance, taxonomic richness, taxonomic diversity, or community composition of ground-dwelling and belowground invertebrates between rain gardens and lawns. These results indicate that the effects of rain gardens on soil faunal community structure varied with soil fauna groups and cities. Considering that soil fauna have positive effects on the function of rain gardens such as water infiltration and decomposition, we suggest that the addition of ground surface mulch such as gravel may enhance soil biodiversity.
更新日期：2024-03-30
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