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A Comparative Analysis of Annual Bioblitz Events at Purchase College: 2023 and 2024
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Jackson, Allyson K.
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Spring 2025
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2025
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9954_Kailey_Ossorio.pdf
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This study examines biodiversity trends at Purchase College through comparative analysis of two annual bio blitzes held in 2023 and 2024. Bioblitzes– community driven biodiversity survey–serve as tools for assessing species richness, diversity and ecological health. Data collected via the iNaturalist platform was analyzed using Shannon- Wiener Diversity Index. Results revealed a 23.95% increase in observations and a 10.26% rise in species richness from 2023 to 2024, alongside higher community participation. The diversity index increased from 2.35 to 2.62, indicating more species distribution in 2024. While plant species remained the most recorded taxa, the 2024 event saw broader taxonomic representation. However, the majority of observations remained non-research grade, highlighting the need for improved verification. Despite limitations such as weather inconsistencies and identification biases, this study demonstrates the value of community science in ecological monitoring and emphasizes the importance of continued effort to enhance data and participation in future bioblitzes.
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