Analyses

Welcome	Data	Analyses	Discussion	Maps

			Analyses
Urban Heat	All Areas	Portland	Tacoma	King County	iNaturalist	City Inventories

Purpose

The purpose of this page is to provide links to the approaches included in the RedHot analyses.

Relationships between the health of redcedar and urban heat were explored with generalized linear mixed effect models.

Background

The iNat Data Summaries has general information about the observations from the WRDM project included in this study.

Analyses

iNaturalist data were downloaded and urban heat data were extracted and merged for each iNaturalist observation. Analyses were completed to explore the relationship between urban heat and three binary response variables representing tree health. Analyses were completed for three areas individually and combined. In the combined area analyses, relationships with two categorical co-factors in addition to urban heat were also explored.

• Binary response variables
  • Tree categorized as healthy or unhealthy
  • Tree did not have a dead-top or tree had a dead-top
  • Tree was not thinning or tree was thinning
• Analyses
  • Urban Heat
    • All Areas GLMMs
    • Portland GLMs
    • Tacoma GLMs
    • King County GLMs

Summaries of the community scientist participation or trends in observations shared are available in the iNaturalist Data Summaries analyses.

Summaries of the redcedar trees in Seattle and Portland street and park tree inventories are available in the City Tree Analyses.

Discussion

See the Discussion page for a list of topics to revisit in analyses and more questions of interest