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Arboriculture & Urban Forestry Online
Volume 41, Issue 3 — May 2015
https://www.isa-arbor.com/Publications/Arboriculture-Urban-Forestry

Leaf-Gas Exchange of Five Tree Species at Urban Street Sites    (View PDF)

Sten Gillner, Sandra Korn, and Andreas Roloff

Abstract: For street trees, site-specific soil and microclimate conditions can restrict growth, health, and longevity for many species. Many urban sites are characterized by a high amount of impervious surface and paved areas resulting in a high rate of surface runoff, low infiltration into soil, and strong reradiation effects. In maintaining the ecologic and economic benefits of street trees through future decades, it is essential to establish species with a high tolerance to stressful urban environments. Researchers measured leaf-gas exchange of Acer platanoides, Acer pseudoplatanus, Platanus × hispanica, Quercus rubra, and Tilia platyphyllos to assess stomatal conductance, transpiration, and net photosynthesis at impervious urban sites in the city of Dresden, Germany. The results show significantly higher leaf-gas exchange rates for the species Platanus × hispanica and Quercus rubra, compared to the species Acer platanoides and Acer pseudoplatanus. The significantly higher mean values of water-use efficiency of Platanus × hispanica and Quercus rubra, and in particular the values during the selected periods with a high vapor pressure deficit, indicate more economical water consumption.

Keywords: Acer platanoides; Acer pseudoplatanus; Climate Change; Dresden; Germany; Leaf-Gas Exchange; Platanus × hispanica; Quercus rubra; Street Trees; Tilia platyphyllos; Urban Trees; Water-Use Efficiency.

https://doi.org/10.48044/jauf.2015.012


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