Table 4 Viable tree species for vegetation barriers in the United Kingdom, with trait-specific information relevant to air pollution mitigation at roadsides (to be used in conjunction with Table 3).

From: Designing vegetation barriers for urban air pollution abatement: a practical review for appropriate plant species selection

Plant species

Morphology

Successional status

Tolerances

Emissions

Mature size

Canopy density

Drought

Salt

bVOCs

Pollen

Acer buergerianum

Large

Dense

–

Moderately tolerant

Yes

Low

Moderate

Acer campestre

Medium

Dense

Early

Moderately tolerant

Yes

Low

Moderate

Acer platanoides

Large

Dense

Late

Moderately tolerant

No

Low

High

Acer pseudoplatanus

Large

Dense

Late

Moderately sensitive

No

Low

High

Acer rubrum

Large

Moderate

Late

Moderately tolerant

Yes

Low

High (var.)

Acer tataricum

Medium

Moderate

Late

Tolerant

Yes

Low

Moderate

Acer tataricum subsp. ginnala

Small

Dense

Late

Moderately tolerant

Yes

Low

Moderate

Ailanthus altissima

Massive

Moderate

–

Tolerant

Yes

Low

Moderate (var.)

Alnus glutinosa

Large

Open

Early

Moderately sensitive

Yes

Low

High

Alnus incana

Large

Open

Early

Moderately sensitive

Yes

Low

High

Alnus × spaethii

Large

Moderate

Early

Moderately sensitive

Yes

Low

High

Amelanchier arborea

Medium

Moderate

–

Moderately sensitive

Yes

Low

Low

Celtis australis

Large

Moderate

Early

Tolerant

Yes

Low

Moderate

Celtis occidentalis

Large

Moderate

Early

Moderately tolerant

No

Low

Moderate

Crataegus monogyna

Small

Dense

Early

Tolerant

Yes

Low

Low

Elaeagnus angustifolia

Medium

Moderate

Early

Tolerant

Yes

Low

High

Eucommia ulmoides

Large

Moderate

–

Tolerant

Yes

Low

High (var.)

Ginkgo biloba

Large

Moderate

–

Tolerant

Yes

High

Moderate (var.)

Gleditsia triacanthos

Large

Open

Early

Tolerant

Yes

Low

Moderate (var.)

Hippophaë salicifolia

Small

Moderate

–

Moderately tolerant

Yes

Low

Moderate (var.)

Koelreuteria paniculata

Large

Moderate

Early

Tolerant

Yes

Low

Low

Liquidamber styraciflua

Large

Moderate

Early

Moderately tolerant

Yes

High

Moderate

Metasequoia glyptostroboides

Massive

Moderate

Early

Moderately tolerant

No

Low

Low

Pinus nigra

Massive

Dense

Early

Tolerant

Yes

Low

Low

Pinus pinaster

Massive

Dense

Early

Moderately tolerant

Yes

Low

Low

Pinus pinea

Large

Dense

–

Tolerant

Yes

Low

Low

Pinus radiata

Massive

Dense

–

Moderately tolerant

Yes

Low

Low

Pinus strobus

Massive

Dense

–

Moderately sensitive

No

Low

Low

Pinus sylvestris

Massive

Moderate

Early

Tolerant

No

Low

Low

Pinus wallichiana

Massive

Moderate

–

Moderately sensitive

No

Low

Low

Platanus × hispanica

Massive

Moderate

–

Moderately tolerant

Yes

High

High

Populus nigra

Massive

Moderate

Early

Sensitive

Yes

High

High (var.)

Prunus avium

Large

Moderate

Early

Moderately sensitive

No

Low

Low

Pyrus calleryana

Medium

Dense

–

Tolerant

Yes

Low

Low

Quercus × bimondorum

Medium

Dense

–

Moderately tolerant

Yes

High

High

Quercus castaneifolia

Massive

Dense

Early

Moderately tolerant

Yes

High

High

Quercus cerris

Massive

Moderate

Early

Tolerant

Yes

High

High

Quercus coccinea

Massive

Moderate

Early

Tolerant

Yes

High

High

Quercus frainetto

Massive

Moderate

Early

Tolerant

Yes

High

High

Quercus × hispanica

Massive

Moderate

–

Tolerant

Yes

High

High

Quercus ilex

Large

Dense

–

Tolerant

Yes

High

High

Quercus palustris

Large

Moderate

Early

Tolerant

Yes

High

High

Quercus petraea

Massive

Moderate

–

Moderately tolerant

Yes

High

High

Quercus phellos

Large

Dense

–

Moderately tolerant

Yes

High

High

Quercus robur

Massive

Moderate

Early

Moderately tolerant

Yes

High

High

Quercus rubra

Massive

Moderate

Early

Moderately sensitive

Yes

High

High

Quercus suber

Large

Dense

–

Tolerant

Yes

High

High

Quercus × turneri

Medium

Dense

–

Moderately tolerant

Yes

High

High

Rhus typhina

Small

Moderate

Early

Moderately tolerant

Yes

Low

High (var.)

Robinia pseudoacacia

Large

Open

Early

Tolerant

Yes

Low

Moderate

Sorbus intermedia

Medium

Moderate

–

Moderately tolerant

Yes

Low

Low

Sorbus latifolia

Large

Moderate

Early

Tolerant

Yes

Low

Low

Styphnolobium japonicum

Large

Moderate

Early

Moderately tolerant

Yes

High

Low

Taxodium distichum

Massive

Moderate

–

Moderately sensitive

Yes

Low

High

Taxus baccata

Large

Dense

Late

Tolerant

No

Low

High (var.)

Thuja plicata

Massive

Dense

Late

Moderately tolerant

No

Low

High

Tilia cordata

Massive

Moderate

Late

Moderately sensitive

No

Low

Moderate

Tilia × europaea

Massive

Moderate

Late

Moderately sensitive

No

Low

Moderate

Ulmus ‘New Horizon'

Large

Moderate

Early

Moderately tolerant

No

Low

–

Ulmus ‘Rebella'

Large

Moderate

–

Moderately tolerant

No

Low

–

Zelkova serrata

Large

Moderate

Early

Moderately tolerant

Yes

Low

High

  1. A dash (–) indicates a lack of available data. For further information and sources used, refer to Supplementary Section S2 and Supplementary Table S2.