A citizen science approach to evaluating US cities for biotic homogenization
- Subject Areas
- Biodiversity, Ecology, Data Science
- citizen science, iNaturalist, urban ecology, biotic homogenization, NLCD
- © 2019 Leong et al.
- This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ Preprints) and either DOI or URL of the article must be cited.
- Cite this article
- 2019. A citizen science approach to evaluating US cities for biotic homogenization. PeerJ Preprints 7:e27472v2 https://doi.org/10.7287/peerj.preprints.27472v2
Cities around the world have converged on structural and environmental characteristics that exert similar eco-evolutionary pressures on local communities. However, evaluating how urban biodiversity responds to urban intensification remains poorly understood because of the challenges in capturing the diversity of a range of taxa within and across multiple cities from different types of urbanization. Here we utilize a growing resource—citizen science data. We analyzed 66,209 observations representing 5,209 species generated by the City Nature Challenge project on the iNaturalist platform, in conjunction with remote sensing (NLCD2011) environmental data, to test for urban biotic homogenization at increasing levels of urban intensity across 14 metropolitan cities in the United States. Based on community composition analyses, we found that while similarities occur to an extent, urban biodiversity is often much more a reflection of the taxa living locally in a region. At the same time, the communities found in high intensity development were less explained by regional context than communities from other land cover types were. We also found that the most commonly observed species are often shared between cities and are non-endemic and/or have a distribution facilitated by humans. This study highlights the value of citizen science data in answering questions in urban ecology.
This is an edited version of our paper after going through a first round of peer review. We added a new analysis that better gets at answering our question of biotic homogenization, and removed a section with overly complicated metrics that didn't.