Urbanization Facilitates Bullfrog Invasion Success and Exacerbates Native Amphibian Declines: A Natural Experiment From the COVID‐19 Lockdown
Jiayi Shi, Keming Wang, Zhirong He, Qingyan Sun, Meiting Liu, Suyue Wang, Chunna Zhang, Yujia Sun, Na Zhao, Supen Wang · 2025
Read Urbanization Facilitates Bullfrog Invasion Success and Exacerbates Native Amphibian Declines: A Natural Experiment From the COVID‐19 Lockdown by Jiayi Shi, Keming Wang, Zhirong He, Qingyan Sun, Meiting Liu, Suyue Wang, Chunna Zhang, Yujia Sun, Na Zhao, Supen Wang (2025) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-12706528.txt.
Description
Jiayi Shi and co-authors report a field study from two thousand twenty-five on how cities help the American bullfrog invade China's Yangtze Basin. Bullfrogs are a global invader that harms native frogs. The COVID lockdowns cut human movement sharply, creating a natural experiment on how people spread the invader.
Paired surveys crossed city-versus-country and invaded-versus-clean sites during quiet and busy periods. Bullfrog densities averaged about one point seven times higher in urban than rural habitats, a gap not explained by habitat traits. Four native frog species declined where bullfrogs settled, with harsher losses in cities, while one toad species oddly increased. When activity resumed, rural bullfrog numbers jumped more than urban ones, suggesting rural spread rides on human transport.
Catalog record
| CREATOR | Jiayi Shi, Keming Wang, Zhirong He, Qingyan Sun, Meiting Liu, Suyue Wang, Chunna Zhang, Yujia Sun, Na Zhao, Supen Wang |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 44 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |