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Using botanic gardens and arboreta to help identify urban trees for the future

Hirons, Andrew D. and Watkins, J. Harry R. and Baxter, Tim J. and Miesbauer, Jason W. and Male-Muñoz, Andrew and Martin, Kevin W. E. and Bassuk, Nina L. and Sjoman, Henrik and Sjöman, Henrik (2021). Using botanic gardens and arboreta to help identify urban trees for the future. Plants, People, Planet. 3 :2 , 182-193
[Research article]

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Abstract

Societal Impact StatementDiversification of urban forests is essential to enhance their resilience to future biotic threats as well as those posed by a changing climate. Arboreta and botanic gardens host a wide range of plant material that can be evaluated to inform tree selection policy. This study demonstrates that plant functional traits, such as the water potential at leaf turgor loss, can be highly instructive when developing evidence-based recommendations for urban environments. However, if botanic collections are to fulfil a critical role in understanding plant response to environment, they should not be managed solely as visitor attractions but must have scientific objectives at the forefront of management policy.SummaryArboreta and botanic gardens host a multitude of species that can be utilized in research focused on improving diversity within urban forests. Higher tree species diversity will enhance the resilience of urban forests to abiotic and biotic threats and help deliver strategies that foster sustainable communities. Consequently, this study aims to demonstrate the value of botanic collections as a resource for research into tree species selection for more resilient urban landscapes. As water stress is a major constraint for trees in urban environments, understanding the drought tolerance of species is essential for urban tree selection. This study evaluates a key functional trait relating to drought tolerance. Using vapor pressure osmometry, the water potential at leaf turgor loss was evaluated for 96 species using plant material from seven botanic collections in North America and Europe. Leaf turgor loss contrasted widely in the temperate deciduous trees evaluated and, in summer, ranged from -1.7 MPa to -3.9 MPa. Significant differences in drought tolerance were also apparent across genera and closely related cultivars. Osmotic adjustment was shown to be a major physiological factor driving leaf turgor loss. A meta-analysis also demonstrated that leaf turgor loss was closely related to a drought-tolerance scale based on observations of tree performance under drought. Arboreta and botanic collections can play a vital role in the evaluation of plant material for urban environments, provided they are curated with scientific objectives at the forefront of management policy and are not managed purely as visitor attractions.

Authors/Creators:Hirons, Andrew D. and Watkins, J. Harry R. and Baxter, Tim J. and Miesbauer, Jason W. and Male-Muñoz, Andrew and Martin, Kevin W. E. and Bassuk, Nina L. and Sjoman, Henrik and Sjöman, Henrik
Title:Using botanic gardens and arboreta to help identify urban trees for the future
Series Name/Journal:Plants, People, Planet
Year of publishing :2021
Volume:3
Number:2
Page range:182-193
Number of Pages:12
Publisher:WILEY
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:drought tolerance, osmotic adjustment, species selection, turgor loss point, urban forestry
URN:NBN:urn:nbn:se:slu:epsilon-p-116198
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116198
Additional ID:
Type of IDID
DOI10.1002/ppp3.10162
Web of Science (WoS)000683464100009
ID Code:27198
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Landscape Architecture, Planning and Management
Deposited By: SLUpub Connector
Deposited On:24 Feb 2022 13:25
Metadata Last Modified:24 Feb 2022 13:31

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