Street Tree Diversity in Three Northeastern U.S. States

Cowett, F.D.; Bassuk, Nina L.

doi:10.48044/jauf.2017.001

Cited by 23 publications

(21 citation statements)

References 37 publications

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“…Street tree diversity has been assessed at a variety of geographic levels. It has most commonly been assessed at the level of the individual municipality (Cowett, Bassuk, 2017). Sjöman et al (2012) assessed street tree diversity in 10 Nordic cities, and Kendal et al (2014) assessed global street tree diversity from 108 cities in six continents.…”

Section: Discussionmentioning

confidence: 99%

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Tree Species Biodiversity in Small Ukrainian Towns

Zibtseva

2022

Ekológia (Bratislava)

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Biodiversity is one of the important indicators of ecosystem sustainability, which is less studied in relation to urban areas, particularly Ukraine, and even more so in small towns. Taking the example of three small Ukrainian towns, the biodiversity of tree species is compared in the article. The studied small towns are located in two geographic zones, mixed forests (Polissya) and forest-steppe, and administratively, in Chernihiv and Kyiv regions. An inventory of trees in the residential area of Ukrainka, in the central streets of Novhorod-Siverskyi, as well as in the central part and all streets of Vyshhorod was conducted. Thus, the species richness of trees both between the studied towns and between its central part and the whole territory of the town was compared. The species structure of tree plantings in terms of richness, diversity, dominance, alignment, and similarity was assessed. The obtained results were subjected to cluster and correlation analysis. It was found that the greatest diversity is characteristic for the dendroflora of the whole territory of Vyshhorod, which is the fastest growing town, located closest to the capital. The dendrofloras of small towns were quite similar to each other. The values of similarity indices varied in a wide range: Jacquard’s index from 0.26 to 0.56 and Sørensen index from 0.41 to 0.66. The lowest degree of similarity was found with the dendroflora of the most distant Novgorod-Siverskyi town. Mainly the urban plantings require enrichment of the tree species composition, taking into account their resistance to anthropogenic impacts and climate change.

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Section: Discussionmentioning

confidence: 99%

“…The species richness by the Margalef index in the sanitary zones of industrial enterprises in Zaporozhye city was significantly lower (1.49-3.68) (Sklyarenko, Bessonova, 2019). In all the studies, deficiencies were found in street tree diversity on using a variety of metrics (Cowett, Bassuk, 2017).…”

Section: Discussionmentioning

confidence: 99%

Tree Species Biodiversity in Small Ukrainian Towns

Zibtseva

2022

Ekológia (Bratislava)

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“…A lower J' indicates low evenness or the dominance of a small number of species. While both the Shannon and Simpson diversity indices have been used to evaluate diversity of urban trees, we focused on the Simpson index because it is sensitive to evenness which is considered a desirable characteristic of urban forests (Cowett and Bassuk 2017). The Simpson index is sometimes reported as the Inverse Simpson Diversity Index (ISDI) for ease of interpretation since a high ISDI indicates high diversity (Sun 1992).…”

Section: Discussionmentioning

confidence: 99%

Long-Term Tree Survival and Diversity of Highway Tree Planting Projects

Salisbury¹,

Miesbauer²,

Koeser³

2022

Preprint

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Long-term, multi-decade research on planted tree survival in urban settings is sparse. One understudied urban environment is highway rights-of-way (ROW), lands adjacent to high-speed, unsignalized roadways. We conducted a re-inventory of tree planting cohort in northern Illinois, U.S. on a 48 km-long highway near Chicago which were 10-, 21-, and 30-years old to evaluate long-term patterns of survival and diversity. Using each randomly selected planting site along the highway as a unit of observation and analysis, we compared the number of trees documented in record drawing to the number of trees currently alive to determine percent survival. We evaluated 224 planting sites which originally contained 2,944 trees and collected data about the planting site location. For the oldest cohort, 26% of trees were still alive in 2018 (median survival by species = 16%, Q1 = 0%, Q3 = 48%), while 31% of the 21-year-old cohort (med. = 6%, Q1 = 0%, Q3 = 47%) and 86% of the 10-year-old cohort were still alive (med. = 85%, Q1 = 74%, Q3 = 96%). The survival of the 21- and 30-year-old cohort matches urban tree survival estimates by other researchers, while the 10-year-old survival is higher than expected. The only planting location characteristic that significantly affected survival was traffic islands (areas between the highway and entrance/exit ramps). Species with low drought tolerance were less likely to be alive for the 10-year-old cohort. Waterlogging tolerant species were more likely to be alive in the 10-year-old cohort. Since some species in the 21- and 30-year-old cohorts had very low survival, the tree species richness and diversity s in study areas declined between the initial record drawings and reinventory. This study demonstrates the challenges of maintaining long-term survival and diversity in the highway ROW and emphasizes the importance of species selection.

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“…Moreover, maples (Acer spp.) accounted for nearly 39% of the aggregated population across the tree inventories in those tree states (Cowett and Bassuk 2017). Maples also dominate in Toronto, Ontario, and other Canadian cities, due in part to political symbolism of maples in Canada (Vander Vecht and Conway 2015;Roman et al 2018).…”

Section: The Problem Of Low Urban Tree Diversitymentioning

confidence: 99%

Conceptualizing the Human Drivers of Low Tree Diversity in Planted Urban Landscapes

Hilbert¹,

Koeser²,

Andreu³

et al. 2022

Preprint

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Despite the abundance of tree diversity in the natural world, and generally high tree species richness in urban areas, urban forests continue to be dominated by a limited number of species. As socio-ecological systems, urban forests are shaped by historical and current management efforts and decision-making of a wide range of human actors. Drawing on past research, we offer a conceptual framework for describing the complex interactions among tree producers and consumers as trees are selected, grown, specified, and planted in private and public urban areas. We illustrate how multiple layers of selection criteria filter down the entirety of potential local tree diversity to a handful of commonly used and accepted tree species. We detail the actors and decision makers who impact tree composition and diversity across several land types. Finally, we identify research, education and outreach needs as they relate to creating more diverse and resilient urban forest ecosystems.

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Street Tree Diversity in Three Northeastern U.S. States

Cited by 23 publications

References 37 publications

Tree Species Biodiversity in Small Ukrainian Towns

Tree Species Biodiversity in Small Ukrainian Towns

Long-Term Tree Survival and Diversity of Highway Tree Planting Projects

Conceptualizing the Human Drivers of Low Tree Diversity in Planted Urban Landscapes

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