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Floristic Phytogeography Of Evergreen Broad-leaved Forest (EBLF) In Mid-subtropical China

Posted on:2007-06-21Degree:MasterType:Thesis
Country:ChinaCandidate:W J ChenFull Text:PDF
GTID:2120360185462313Subject:Ecology
Abstract/Summary:PDF Full Text Request
Flora of EBLF in Mid-subtropical China, one of the important type of vegetations flora in China, was first analyzed as a whole object. Depend on the investigation resource and a large amount of references, complete floristic studies on the flora of EBLF in Mid-subtropical China were carried out. Based on the studies, many of characters of the flora EBLF in Mid-subtropical China were achieved as following:1. There were about 182 families, with 816 genus, include 3021 species (include var species) in flora EBLF in Mid-subtropical China. Among them, 35Fam,with 81Gen,contained 283Sp belong to Pteridophytorum ; 7Fam, with 17Gen, contained 37Sp belong to Gymnosperms, and 140Fam, with 719Gen, contained 2701Sp belong to Anthophytes (in which there were 15Fam, with 133Gen, contained 330Sp of Monocotyledodenopsida and 125Fam, with 585Gen,contained 2371 Sp of Dicotyledodenopsida. It suggested that flora of the Mid-subtropical EBLF was complex and diversity. Small-sized family which contains less than 50 species and small-sized genera which contains less than 20 species played important parts in composition of families and genus. In life-form composition of species, woody plants were dominant composition. That was character of forest flora.2. Geographical elements were complex and diversity in flora of the Mid-subtropical EBLF. There were 11 areal-types and 14 subtypes at the families rank in this flora, and number of Pantropic families was the most. At the genus rank, there were 14 areal-types and 18 subtypes. Among them, Pantropic and Tropical Asia elements were the mostly areal-types. The dominant element at the species rank was Endemic to China.The analysis of areal-types of the floristic elements showed that the property of EBLF in Mid-subtropical China was the tropical infected by its families, and sub-tropical infected by its genus, and the temperate infected by its species. It suggested that the floristic property of the flora of EBLF in Mid-subtropical China was typically subtropical and had a development tendency from tropical to temperate.3. The dominant phenomenon in flora EBLF in Mid-subtropical China was very...
Keywords/Search Tags:EBLF in Mid-subtropical China, flora, geographical areal-types, flora origin
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