vegetation pattern
1.The differences of biodiversity indices and vegetation coverage between the designed vegetation restoration pattern and the field data indicated that alpha and beta diversity indices were decreased in some parts of the region after vegetation restoration, however, vegetation coverage was reasonably increased, which would enhance the capability of soil and water preservation, thus could improve the ecological security of the region.
3.Quantitative research on ecological relationships at landscape and re gion scales between vegetation and the environment has been developing rapidly, and became one of the focuses of vegetation science. In this paper, pattern of f orest vegetation in Zhuweigou of Lishan Mountain Nature Reserve, in relation to the environmental factors, was investigated using TWINSPAN, DCA and DCCA.
4.Thornthwaite′s method on calculating PE and climatic classificationhas been applied on computing data from 671 climatological observationstations in China. A geographic regression model of potential evapotran-spiration is resulted as APE=2037. 98-18. 8308LAT-4.5801 LONG-0.157861ALT. The resulted APE and moisture index, Im are closely cor-related with the major vegetation types and their distribution pattern inChina.
6.Quantitative ordination and classification is a group technique of multivariate analysis and becomes more and more important in vegetation ecological studies. TWINSPAN, DCA, CCA, DCCA were employed to study vegetation community types, community structure, ecological environment and community distribution pattern in the present study.
7.There are 62.6% evergreen and 37.4% deblade in 107 species,of which the Na. ph was the first position accounts for 20.6%. Meanwhile,the leaf size class of the vegetation was mainly microphylla(57.9%),and 81.6% of the leaf pattern was simple leaf.
8.Fuzzy set ordination (FSO) technique was applied to analyze the data of primary soil chemical composition and vegetation from samples in Antaibao Mine in Pingshuo area and discuss the interrelation among environment of mine, distribution pattern and dynamic of vegetation.
9.This change pattern of vegetation not only agrees closely with the neogenous peak of the fern and articulate species at the boundary between the Benchi and Taiyuan Formations in whole Late Palaeozoic flora in North China, but is equivalents to the change in dominance pattern in the Late Carboniferous Euramerican vegetation as well.
10.The distribution pattern of vegetation reflects the comprehensive influence of environments. The results of DCA and DCCA clearly reflect the relationship between the pattern of forest communities and environmental gradients. The ordination result of DCCA indicates that altitude is more important than other environmental factors,because the change of altitude gradient will lead to the varieties of temperature gradients and humidity gradients.
