| Based on the investigation and a large amount of references, adopting the theories and methods ofthe related disciplines of Floristic Geography, Plant Ecology, etc., the floristic geography ofspermatophyta in the north section of Mt. Donggong was first analyzed as a whole abjact. The flora ofspermatophyta in the north section of Mt. Donggong and transited species, and the endemicphenomennon of flora were analysed so as to provide preference for research of broad area flora. Themain achievements were summarized as follows:1．The characteristics of floristic composition and areal types.(1) The characteristics of compositionThere were2426species (including infraspecies taxon, the below is the same) of spermatophytabelonging to211families and893genera in the north section of Mt. Donggong in consideration of asimplified population analysis, including7families19genera25species Gymnospermae and204families874genera2401species Angiospermae. Thus the species of this area were comparatively richand the species density was high.The characteristic (or typical) taxa were comparatively rich. There were53dominant families,11characteristic families and33dominant genera,8characteristic genera.(2) The characteristics and configuration of life formsAt familiy level, among them the terrestrial herbage had a high percentage (40.3%), the plant ofboth arbo and shrub flourishing was minimum,2families, only0.9%. At genera level, the terrestrialherbage played a dominant role. At species level, herbage was dominant in life style. Thus the life formsin the north section of Mt. Donggong were relatively rich.(3) The characteristics of floristic areal typesThe areal-type of families in the north section of Mt. Donggong could be divided into10types and11subtypes, and the areal-type of genera could be classified into14types and28subtypes. Thus itcould be seen that the floristic had complex geographical element.From the point of family geographical distribution area types, there were92families (60.5%stronger)(except the widespread, the below is same) belonging to tropical distribution, and52 families(34.2%weaker) belonging to temperate zone. From the point of genera geographicaldistribution area types. there were390genera (47.5%stronger) belonging to tropical distribution, and337genera (41.2%weaker) belonging to temperate zone. They all proved that the floristic componentsshowed tropical characteristics, add in some of temperate zone characteristics.2．The characteristics of floristic composition and areal types of Type-Ⅰ and Type-Ⅱ(1) The characteristics of composition of Type-Ⅰ and Type-ⅡType-Ⅰ included354species belonging to100families240genera, among them there were1families1genera1species Gymnospermae and99families239genera353species Angiospermae. Andthere were336species belonging to101families219genera of Type-Ⅱ, including3families3genera3species Gymnospermae and98families216genera333species Angiospermae. Thus the species ofType-Ⅰ and Type-Ⅱ were comparatively rich.There were27dominant families,31characteristic families and63dominant genera of Type-Ⅰ,and28dominant families,39characteristic families and66dominant genera of Type-Ⅱ.(2) The characteristics and configuration of life forms of Type-Ⅰ and Type-ⅡThe354species of life forms of Type-Ⅰ could be diveded into4categories and9sub-categories,herbage vegetation had most species,204species (57.6%), and woody plants had a smaller one,143species (40.3%). Thus Type-Ⅰ kept mainly herbage, secondarily woody plants.The336species of life forms of Type-Ⅱ also could be diveded into4categories and9sub-categories, woody plants had most species,197species (58.6%), and herbage vegetation had a smallerone,143species (40.3%). Unlike Type-Ⅰ, Type-Ⅱ keep mainly woody plants, secondarily herbage.(3) The characteristics of floristic areal types of Type-Ⅰ and Type-ⅡAt families level, Type-Ⅰcould be divided into9types,5subtypes, and Type-Ⅱ could be dividedinto8types,6subtypes. At genera level, Type-Ⅰ could be classified into13types and14subtypes, andType-Ⅱ could be diveded into12types,20sub-types. Thus it could be seen that both of the two typeshad complex geographical element.Based the analysis of family and genera geographical distribution area types, both of Type-Ⅰ andType-Ⅱ showed tropical characteristics, add in some of temperate zone characteristics.3. The endemic phenomennon of flora of the north section of Mt. Donggong (1) The endemic phenomenon of familiesThere aren’t families which is endemic to China in this region. From this, we can conclude that theflora of this region is young at family level.(2) The endemic phenomenon of generaThere were24genera of spermatophyta including2classes3families3genera Gymnospermaeand6classes17families21genera Angiospermae, which account for2.9%of all genera and accountfor10%of the endemic to China.At the level of life forms, the endemic to China of genera kept mainly deciduous arbor andperennial herbage, and the woody plant had a slight edge compared to the herbage.(3) The endemic phenomenon of speciesThere were654species of spermatophyta including2classes5families12genera15speciesGymnospermae and8classes113families288genera639species Angiospermae, which account for55.9%of all families, account for33.6%of all genera and account for27.0%of all species. At the levelof life forms, we could see the characteristic of scattered distribution.There were47species of spermatophyta, belonging to27families36genara, including1families1genera1species Gymnospermae and26families35genera46species Angiospermae. The life forms ofthe endemic to Zhejiang of species were different from the spermatophyta of the north section of Mt.Donggong and the endemic to China of species, and the percentage of liana were bigger than thepercentage of arbor. |
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