Graduation Year


Date of Submission


Document Type

Open Access Senior Thesis

Degree Name

Bachelor of Arts



Reader 1

Dr. Diane Thomson

Reader 2

Dr. Elise Ferree

Terms of Use & License Information

Terms of Use for work posted in Scholarship@Claremont.


Over 1,500 of the 4000 bee species found in North America inhabit California. Native bees are declining however, largely due to climate change and agricultural intensification. Previous research shows that cities can sustain diverse bee communities, due to the diversity of ornamental flowers. Urban green space represents an opportunity for native bee conservation. Residential gardens provide lots of green space and are urban pollinator hotspots. Managing yards for increased floral resources and nesting habitat can benefit native bee communities. Turfgrass provides few floral or nesting resources and negatively correlates with bee diversity. The 2011-2017 California drought caused many homeowners to reduce turf cover, potentially benefiting pollinator habitat. We assessed the current status of pollinator habitat in residential yards of Claremont California and evaluated how the quality of habitat changed due to re-landscaping since 2011. Although in yards where changes were made, turfgrass decreased by a third of its original cover (