Characters Of Plant Communities And Ecological Evaluation In Fuzhou Park Greenlands

The park green space as an importance part of a urban green space system, which played an importance role in maintaining and improving urban ecosystem.By taking five parks greenland's plant communities as the research object, including the park in the northern bank of min river, the park in the southern bank of min river,forest park , west lake park, hot spring's park in Fuzhou City, species of plants and present situation of plant community were investigated, analyzed and evaluated on species composition of the plant community,structural characteristics,plant species diversity,interspecific association between tree species,ecological and landscape coordination of plant communities.Based on photographs of plant communities in five parks, scenic beauty of community landscape was evaluated by using the scenic beauty estimation(SBE)of psychophysical paradingm.Using CAD planar graphs of the park green space and field survey data,analyzed ladscape pattern of the greenbelt.The results would provide scientific basis for ecological construction of park green space in Fuzhou.1.There were 247 vascular plants belonging to 173 genus and 81 families in 105 greenlands of Fuzhou City park,including 2 species of Pteridophyte,belonging to 2 genus and 2 families,19 species of Gymnosperms,belonging to 14 genus and 7 families,165 species of Dicotyledon,belonging to 115 genus and 60 families,61 species of Monocotyledon,belonging to 42 genus and 12 families.About woody plants,there were 153 zone indigenous plants belonging to Fuzhou, which was approximately 83.15% in all zone indigenous plants. About herbaceou plants,there were 31 zone indigenous plants belonging to Fuzhou,about 16.85% in all zone indigenous plants. The Proportion of arbor,bush and herbaceou between zone indigenous plants and exotic plants were respectively 1.7∶1,3.5∶1 and 3.9∶7.The results indicated there were strong zone characteristics in floristic composition of sample communities in Fuzhou city parks.2. There were 11 community types in sample communities of Fuzhou city parks.The zone vegetation type of evergreen broad-leaved forest and the type of evergreen and deciduous broadleaved mixed forest were distinct, taking 25.71% and 36.19% in all types respectively. Results showed that the vegetation zonality of communities in Fuzhou parks displaied remarkably.3.The structure of plant communities was multiple structure combined with arbor,bush and herbaceou on the whole in communities of Fuzhou city parks.About the arbor in parks'sample plots,the top ten Importance Value of plants was as followings in turn: Livistona chinensis, Prunus persica Batsch.var.duplex Rehd, Dimocarpus longgana, Araucaria cunninghamia, Carvota mitis, Ficus microcarpa, Taxodium ascendens, Phoenix dactylifera, Roystonea regia (HBK.)O.F. Cook, Washingtonia filifera.The higher Importance Value of bush: Rhododendron simsii, Loropetalum chinense var. rubrum, Schefflera octophylla, Duranta repens'Variegata', Ligustrum sinense, Cassia bicapularis, Ficus microcarpa'Aurea',and the same in herbaceou: Ophiopogon bodinieri, Canna indica, Gardenia stenophylla, Pilea notata, Alpinia sanderae Hort. etc.4.There were no regularity in different parks of Fuzhou city to Species diversit:the richness index,Simpson index,Shannon-Wiener index and Pielou index of arbor layer in forest park were highest,but its Pielou index of herbaceous layer was lower.The Simpson index,Shannon-Wiener and richness index of arbor and shrub layers in the southern bank of min river were lowest,but its Pielou index of herbaceous layer was highest.The studied whole indexs in three layers in the northern bank of min river were all lower,and indexs of shrub layers in hot spring's park and forest park all higher.In different layers,the characteristics of community diversity could be identified as richness index arbor layer> shrub layer >herbaceous layer. forest park and hot spring's park were obviously higher than other three parks in richness index.Diversity index arbor layer displaied higher generally,and Pielou index arbor layer>herbaceous layer>shrub layer.5.The essay analyzed the interspeciffic relationship and studied the grow status and space composing characteristic of plants by plant growth index and Jaccard quantitative coefficient of currection.The rasults were as follow:there were 56 tree species with plant growth index>60 and frequence>0.3 in the parks in Fuzhou,including 23 tree species witn plant growth index>75.In the space construction the biological relation was not obvious,the tree variety was not abundant.6.By using the methouds of Stratified analysis and Delphi, comprehensive evaluation about ecological and landscape coordination of plant communities were made on 105 plant communities in Fuzhou city parks.The results showed there were 19 plant commmunities with highest coordination,which was 18.1% in all investigative communities,including 2 communities in the park on the northern bank of min river,8 communities in the park on the southern bank of min river,6 communitese in west lake park and 3 communities in hot spring's park.There were 61 communitese evaluated better, about 58.1% in all communitese,and they were more than half of all.7.Using the scenic beauty estimation(SBE),10 assessment elements were selected to analyze and evaluate the plant communities in Fuzhou parks.The results showed that 4 elements such as the structure of life form, The Proportion of green leaves,number of color, color properties maid as the leading factors to the scenic beauty of plants in parks.8.Using Fuzhou city parks'CAD drawings as the basic map, the paper analyzes five Fuzhou city parks and various elements of the overall landscape of the spatial distribution pattern through field surveys to determine plaque border, in support of GIS software patch area and perimeter extraction of basic information, combined with the Fuzhou city parks of the actual situation in the landscape, selected patch area, patch density index, landscape diversity, landscape and landscape dominance index, such as fractal dimension indicator of landscape ecology, different types of landscape elements of the pattern of index calculation and comparison,. The results showed that: Fuzhou city parks are with small green plaque space, few landscape diversity index, a high degree of fragmentation, low connectivity.