Date of Award
Bachelor of Science (B.S.) in Biology and University Honors
Birds -- Variation -- Oregon -- Portland, Urban parks -- Oregon -- Portland, Species diversity, Bird surveys
I used data collected from eBird for 15 urban parks in Portland, Oregon to determine the effect of park area on species richness and diversity. Two data sets were extracted for each park; a full data set with the entire number of observations; and a reduced data set with 9 observations. Data sets were compared to determine if the same results and conclusions could be made with lower number of observations as compared to a much larger sample. In both data sets, species richness and diversity increased with park area. Although there was no significant difference in species diversity between data sets, richness was greater with more observations, indicating that more observations are needed to accurately calculate richness.
Tippetts, Jordan J., "Analysis of Avian Diversity and Richness in Relation to Urban Park Size Using eBird" (2018). University Honors Theses. Paper 599.