Studies on seed plant floras and plant resources of Dongla Mountain 
Grand Canyon, Sichuan Province

doi:10.3969/j.issn.1000-2006.201704042

Studies on seed plant floras and plant resources of Dongla Mountain Grand Canyon, Sichuan Province

QIAN Huirong, YANG Guodong, CHEN Lin

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2018, Vol. 42 ›› Issue (02) : 52-58.

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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2018, Vol. 42 ›› Issue (02) : 52-58. DOI: 10.3969/j.issn.1000-2006.201704042

Studies on seed plant floras and plant resources of Dongla Mountain Grand Canyon, Sichuan Province

QIAN Huirong, YANG Guodong, CHEN Lin^*

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Abstract

【Objective】 This study aimed to investigate the seed plant flora and plant resource characteristics in Dongla Mountain Grand Canyon, Sichuan, providing basic information for the conservation of biodiversity and utilization of sustainable resources.【Method】Based on a field investigation, information on the floristic geography and plant resources was used to analyze the seed plant floristic composition and resource characteristics in this area.【Results】①There were 836 species belonging to 390 genera and 117 families. In addition, 353 herbs, as the primary life form, were identified, accompanying 228 trees, 195 shrubs, and 60 lianas. ②The 23 dominant families that contained more than 10 species, including 203 genera and 524 species in total, accounted for 52.05% and 62.68% of all genera and species, respectively. ③Tropical elements were dominant, especially the pantropic, which reached up to 41.36% at family level, while the temperate elements were extremely dominant at the genus and species level, with north temperate species taking up the highest proportion of both with 30.92% and 46.76%, respectively. 【Conclusion】 The floral constitution of this area had an old and simple origin at the family level, but was complex with regard to genera. The origin of the genera was mainly tropical, while the genera were dominated by those of temperate distribution with obvious transitional characteristic. The cluster analysis of five regions indicated the highest floral similarity was between Dongla Mountain and Baima Snow Mountain, which were mainly temperate, and were accompanied by some tropical elements. The plant resource types were mainly wood, medicinal, edible and ornamental, which have high development and utilization values.

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QIAN Huirong, YANG Guodong, CHEN Lin. Studies on seed plant floras and plant resources of Dongla Mountain Grand Canyon, Sichuan Province[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2018, 42(02): 52-58 https://doi.org/10.3969/j.issn.1000-2006.201704042

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