Evaluating the effectiveness of modified pitfall traps via the analysis of species richness, abundance, and biodiversity indexes in a city area
Shunwa Takayama, S. Sugo
Mita International School of Science, Setagaya, Japan
Publication date: November 20, 2025
Mita International School of Science, Setagaya, Japan
Publication date: November 20, 2025
DOI: http://doi.org/10.34614/JIYRC2025II36
ABSTRACT
This research investigates the effectiveness of modifications to pitfall traps for enhanced insect collection in urban environments. Pitfall traps are a globally recognized method for surveying biodiversity to assess ecological health, as well as providing a means to tackle environmental concerns. In this investigation, modifications including fermented bait, concentrated lighting, refined build, and the use of a roof were compared to the original pit. Using seven of the same design, the trend was found to have a positive effect, as it displayed an approximately 15% increase in population and heightened diversity, with the Shannon index rising from 0.496 to 1.032. Based on the collection of weather data alongside the insects, it was determined that weather also influenced both the population and diversity of the insects. This investigation can be used for further research in surveying methods in cities, ultimately improving our understanding of Earth’s ecological health.
This research investigates the effectiveness of modifications to pitfall traps for enhanced insect collection in urban environments. Pitfall traps are a globally recognized method for surveying biodiversity to assess ecological health, as well as providing a means to tackle environmental concerns. In this investigation, modifications including fermented bait, concentrated lighting, refined build, and the use of a roof were compared to the original pit. Using seven of the same design, the trend was found to have a positive effect, as it displayed an approximately 15% increase in population and heightened diversity, with the Shannon index rising from 0.496 to 1.032. Based on the collection of weather data alongside the insects, it was determined that weather also influenced both the population and diversity of the insects. This investigation can be used for further research in surveying methods in cities, ultimately improving our understanding of Earth’s ecological health.
