Skip to Main Content
Factors affecting long-term mortality of residential shade trees: evidence from Sacramento, CaliforniaAuthor(s): Yekang Ko; Jun-Hak Lee; E. Gregory McPherson; Lara A. Roman
Source: Urban Forestry & Urban Greening. 14(3): 500-507
Publication Series: Scientific Journal (JRNL)
Station: Pacific Southwest Research Station
View PDF (390.35 KB)
DescriptionUrban tree survival is essential to sustain the ecosystem services of urban forests and monitoring is needed to accurately assess benefits. While some urban forestry studies have reported street tree survival, little is known about the factors influencing residential yard tree survival, especially over the long-term. We assessed residential shade tree survival in Sacramento, California over 22 years. Tree survival data were collected through field surveys and aerial photointerpretation. Survival analysis was used to evaluate longitudinal tree survivorship. Multivariate logistic regression was used to identify factors associated with mortality at the property- and tree-level. Our results showed that 22-year survivorship was 42.4% with 96.2% annual survival rate and 3.82% annual mortality rate. Our observed mortality was substantially higher than initial projections that were used to estimate long-term energy saving performance of the Sacramento Shade program. We found that higher mortality during the establishment phase was associated with greater number of trees delivered and with planting in low and high net property value properties (compared to those with medium net property value). For the post-establishment phase, trees with small mature size those planted in backyards and those in properties with very unstable homeownership were more likely to die. This study has implications for the development of data-driven urban forestry programs and provides more realistic assumptions to accurately estimate the long-term benefits of tree planting initiatives.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationKo, Yekang; Lee, Jun-Hak; McPherson, E. Gregory; Roman, Lara A. 2015. Factors affecting long-term mortality of residential shade trees: evidence from Sacramento, California. Urban Forestry & Urban Greening. 14(3): 500-507.
Keywordsmonitoring, residential, survivorship, tree mortality, urban ecosystem, yard tree
- Long-term monitoring of Sacramento Shade program trees: tree survival, growth and energy-saving performance
- Determinants of establishment survival for residential trees in Sacramento County, CA
- Urban tree mortality: a primer on demographic approaches
XML: View XML