Mo, Lingzi and Xu, Guoliang and Zhang, Jiaen and Wu, Zhifeng and Yu, Shiqin and Chen, Xiaohua and Peng, Bin and Squartini, Andrea and Zanella, Augusto (2021) Threshold Reaction of Soil Arthropods to Simulative Nitrogen Deposition in Urban Green Spaces. Frontiers in Ecology and Evolution, 9. ISSN 2296-701X
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Abstract
Sustained nitrogen (N) deposition has a wide-ranging impact on terrestrial ecosystems. However, still little attention has been paid to responses of urban soil fauna to the increasing N deposition. To clarify such effects on the soil properties and soil fauna in typical urban lawns (featuring Cynodon dactylon vegetation), a control experiment was conducted for 1 year, in which NH4NO3 was added as the external N source with four treatments of N addition: N0 (i.e., only water), N1 (50 kg N ha–1 yr–1), N2 (100 kg N ha–1 yr–1), N3 (150 kg N ha–1 yr–1). Results showed that N additions influence soil faunal communities in the urban lawns soil. The relative abundance of Oribatida increased with the N treatment level, partially replacing the more sensitive Collembola. Significant differences in the Shannon-Wiener and Margalef indices (p < 0.01) supported this statement. Although higher doses of N addition showed adverse effects on soil fauna communities, low N inputs increased the soil fauna diversity and richness, especially at 5–10 cm depth. A threshold effect appears to exist: low N addition (<25 kg N ha–1) did not negatively affect pedofauna structure and composition, while in the range from these values up to 50 kg N ha–1, the composition of the soil fauna underwent major changes which were confirmed by the decline of biodiversity indices. These changes are accompanied by the decreased pH values with increasing N inputs.
Item Type: | Article |
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Subjects: | West Bengal Archive > Multidisciplinary |
Depositing User: | Unnamed user with email support@westbengalarchive.com |
Date Deposited: | 12 Jul 2023 12:48 |
Last Modified: | 12 Sep 2024 04:37 |
URI: | http://article.stmacademicwriting.com/id/eprint/1185 |