Species diversity of three major urban forest types in Guangzhou city, China

Abstract Guangzhou city in South China was assessed to understand the associations between tree species diversity and urban development. The study area covers five urban districts which form the bulk of the built-up areas. Reconnaissance field trips and aerial photograph survey identified main green covers in three urban-forest types, namely roadside niches, urban parks, and institutional grounds. Trees at roadsides and 21 parks were censused, whereas 14 large institutional sites were sampled. A total of 115,140 trees were evaluated for species identification, dimensions and site-environs conditions, with 40.8% at roadsides, 38.2% in parks, and 21.0% in institutional grounds. The urban forests composed of 254 species in 62 botanical families led by Moraceae, Caesalpiniaceae and Myrtaceae. Institutional forest has the highest diversity, followed by park and roadside trees. Most trees are derived from a small group of dominant species. Broadleaf species are prominent, especially the evergreen, whereas conifers and palms are sparingly adopted, except palms in institutional areas. Exotic species, mainly originating from tropical Asia and Australia, are common but not as dominating as in other tropical cities. Native species include spontaneous invasion into ruderal habitats, especially in parks. Species composition was interpreted vis-a-vis the interplay of natural and cultural factors then and now. Changing site conditions (geometric vs. physiological attributes), decision-making and management regimes (official-public vs. individual-lot stewardship), funding constraint (straitjacketed vs. adequate), intended amenity functions, and evolving landscape fashion (traditional vs. innovative), have helped to mould respective species assemblages to define their identity. Implications for long-term tree planning and management in Guangzhou and other fast developing cities are explored.

[1]  J. McBride,et al.  Presettlement forest structure as a factor in urban forest development , 1986 .

[2]  Robert W. Miller.  Urban Forestry: Planning and Managing Urban Greenspaces , 1988 .

[3]  R. A. Sanders.  Some determinants of urban forest structure , 1984 .

[4]  O. Gilbert,et al.  Urban Vegetation: A Review and Chicago Case Study. , 1975 .

[5]  D. Nowak.  Historical Vegetation Change in Oakland and Its Implications for Urban Forest Management , 1993, Arboriculture & Urban Forestry.

[6]  G. V. Profous.  Trees and Urban Forestry in Beijing, China , 1992, Arboriculture & Urban Forestry.

[7]  G. Grey.  The Urban Forest: Comprehensive Management , 1995 .

[8]  E. H. Simpson.  Measurement of Diversity , 1949, Nature.

[9]  C.Y. Jim.  THE STATUS AND PROSPECTS OF URBAN TREES IN HONG KONG , 1987 .

[10]  C.Y. Jim.  Roadside trees in urban Hong Kong: Part II species composition , 1996 .

[11]  J. A. Schmid.  Vegetation Types, Functions, and Constraints in Metropolitan Environments , 1979 .

[12]  Chi Yung Jim,et al.  Land use and amenity trees in urban Hong Kong , 1987 .

[13]  R. Rowntree,et al.  THE URBAN FOREST LANDSCAPE OF ATHENS, GREECE: ASPECTS OF STRUCTURE, PLANNING AND MANAGEMENT , 1988 .

[14]  R. Corlett.  Environmental forestry in Hong Kong: 1871–1997 , 1999 .

[15]  H. Sukopp,et al.  Urban environments and vegetation , 1983 .

[16]  C.Y. Jim.  Tree–Habitat Relationships in Urban Hong Kong , 1992, Environmental Conservation.

[17]  T. R. Detwyler,et al.  Urbanization and environment : the physical geography of the city , 1972 .

[18]  Chi Yung Jim,et al.  Trees and high-density urban development: Opportunities out of constraints , 1993 .

[19]  Chi Yung Jim,et al.  Storm damage on urban trees in Guangzhou, China , 1997 .

[20]  Chi Yung Jim,et al.  A planning strategy to augment the diversity and biomass of roadside trees in urban Hong Kong , 1999 .

[21]  Wolfram Kunick.  Woody vegetation in settlements , 1987 .

[22]  D. Hill.  Forest fragmentation and its implications in central New York , 1985 .

[23]  R. Rowntree,et al.  THE STRUCTURE AND MANAGEMENT OF THE URBAN FOREST IN PRAGUE, CZECHOSLOVAKIA. II HISTORY OF PRAGUE GREENSPACE MANAGEMENT , 1993 .

[24]  J. G. Kelcey.  The Green Environment of Inner Urban Areas , 1978, Environmental Conservation.

[25]  F. B. Goldsmith.  Threats to woodland in an urban landscape: A case study in Greater London , 1988 .

[26]  C.Y. Jim.  Diversity of amenity-tree species in Hong Kong. , 1991 .

[27]  C.Y. Jim.  Tree-canopy characteristics and urban development in Hong Kong , 1989 .

[28]  C.Y. Jim.  Provenance of amenity-tree species in Hong Kong. , 1992 .

[29]  J. C. Stevens,et al.  Measuring and analyzing urban tree cover , 1996 .

[30]  J. M. Welch.  Street and park trees of Boston: a comparison of urban forest structure , 1994 .

[31]  Robert D. Brown,et al.  A framework for the design of wildlife conservation corridors With specific application to southwestern Ontario , 1997 .

[32]  Claude E. Shannon,et al.  The Mathematical Theory of Communication , 1950 .

[33]  Arthur M. Winer,et al.  Composition and dominance in Los Angeles Basin urban vegetation , 1984 .

[34]  Ralph A. Sanders,et al.  Diversity in the street trees of Syracuse, New York , 1981 .

[35]  J. McBride,et al.  Structure and condition of older stands in parks and open space areas of San Francisco, California , 1984 .

[36]  C.Y. Jim,et al.  A COMPARATIVE STUDY OF ROADSIDE-TREE COMMUNITIES IN URBAN HONG KONG AND GUANGZHOU , 1997 .