| Autor: |
Shengjie Liu, Jocelyn E. Behm, Yuanyuan Meng, Wei Zhang, Shangwen Xia, Xiaodong Yang, Shenglei Fu |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Global Ecology and Conservation, Vol 39, Iss , Pp e02299- (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2351-9894 |
| DOI: |
10.1016/j.gecco.2022.e02299 |
| Popis: |
Bottom-up forces play a critical role in structuring communities and trophic interactions in detritus-based food webs, yet the impact of global change factors on these forces has been seldom explored. Here, we investigated the bottom-up effects of N-addition concentrations and methods (canopy and understory addition of N) on the trophic structure of detrital food webs comprising three trophic levels (saprotrophic fungi, Collembola and spiders) in a temperate and subtropical forest. At both forests, we found that high N concentrations significantly increased the concentration of litter N and saprotrophic fungi, and also increased Isotomidae collembolan density, but did not cascade up to the spider predator level. In contrast, the N addition methods had no significant impact on any component of trophic structure at either forest. In conclusion, N concentration significantly influenced trophic structure by bottom-up effects. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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