Table 2 Indices denoting the quantity and importance value (IV) of the main heritage tree species in Taiyuan, arranged in descending order of IV. The tree counts of species distributed in three age tiers (1 for > 500 years, 2 for 300−499 years and 3 for 100−299 years) are included.
From: Species diversity and spatial pattern of heritage trees in Taiyuan
Species | Family | Tier 1 | Tier 2 | Tier 3 | Tree count | Cumulative DBH | IV |
|---|---|---|---|---|---|---|---|
Ziziphus jujuba Mill. | Rhamnaceae | 12 | 134 | 2040 | 2186 | 101,062.6 | 40.9 |
Styphnolobium japonicum (L.) Schott | Leguminosae | 293 | 350 | 624 | 1267 | 107,244.3 | 32.3 |
Platycladus orientalis (L.) Franco | Cupressaceae | 82 | 92 | 174 | 348 | 16,750.0 | 6.6 |
Pinus tabuliformis Carrière | Pinaceae | 26 | 58 | 167 | 251 | 13,112.5 | 5.0 |
Ulmus pumila L. | Ulmaceae | 11 | 32 | 147 | 190 | 14,255.7 | 4.5 |
Catalpa bungei C. A. Mey. | Bignoniaceae | 7 | 8 | 88 | 103 | 5369.7 | 2.0 |
Juglans regia L. | Juglandaceae | 2 | 5 | 46 | 53 | 3844.3 | 1.2 |
Salix matsudana Koidz. | Salicaceae | 2 | 28 | 30 | 3339.5 | 0.9 | |
Robinia pseudoacacia L. | Leguminosae | 32 | 32 | 2400.3 | 0.8 | ||
Ziziphus jujuba var. spinosa (Bunge) Hu ex H.F.Chow | Rhamnaceae | 5 | 5 | 21 | 31 | 1233.1 | 0.5 |
Celtis bungeana Blume | Cannabaceae | 1 | 10 | 16 | 27 | 1387.3 | 0.5 |
Toona sinensis (Juss.) Roem. | Meliaceae | 18 | 18 | 1034.4 | 0.4 | ||
Gleditsia sinensis Lam. | Leguminosae | 2 | 7 | 7 | 16 | 989.5 | 0.3 |
Salix babylonica L. | Salicaceae | 3 | 10 | 13 | 964.6 | 0.3 | |
Juniperus chinensis Roxb. | Cupressaceae | 10 | 10 | 1015.0 | 0.3 | ||
Ginkgo biloba L. | Ginkgoaceae | 2 | 6 | 2 | 10 | 845.9 | 0.3 |
Morus alba L. | Moraceae | 1 | 9 | 10 | 739.2 | 0.2 | |
Malus pumila Mill. | Rosaceae | 11 | 11 | 466.6 | 0.2 | ||
Ailanthus altissima (Mill.) Swingle | Simaroubaceae | 5 | 3 | 8 | 506.4 | 0.2 | |
Populus simonii Carrière | Salicaceae | 3 | 2 | 5 | 681.5 | 0.2 | |
Syringa oblata Lindl. | Oleaceae | 6 | 3 | 9 | 350.6 | 0.2 | |
Syringa reticulata subsp. amurensis (Rupr.) P. S. Green & M. C. Chang | Oleaceae | 8 | 8 | 330.9 | 0.1 | ||
Euonymus maackii Rupr. | Celastraceae | 1 | 6 | 7 | 374.2 | 0.1 | |
Populus tomentosa Carrière | Salicaceae | 6 | 6 | 374.8 | 0.1 | ||
Xanthoceras sorbifolium Bunge | Sapindaceae | 2 | 2 | 2 | 6 | 372.3 | 0.1 |
Prunus armeniaca L. | Rosaceae | 1 | 5 | 6 | 360.5 | 0.1 | |
Paeonia × suffruticosa Andrews | Paeoniaceae | 1 | 2 | 2 | 5 | 257.0 | 0.1 |
Others | 2 | 18 | 51 | 71 | 3509.2 | 1.4 | |
Total | 460 | 749 | 3528 | 4737 | 283,171.9 | 100.0 |
