Plant Species Diversity of Mixed Broadleaf-conifer Forest in Mid Mountain Region of Dayaoshan State Natural Reserve,Guangxi
Author(s): YAN Li, WANG Lei, LOU Bao-ting, ZHOU Xiao-guo, ZHU Hong-guang, YOU Ye-ming, LI Xiao-qiong, WEN Yuan-guang, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Forestry College of Guangxi University, Management Office for Dayaoshan State Natural Reserve
Pages: 600-605+611
Year: 2015 Issue: 6
Journal: Guangxi Sciences
Keyword: mixed broadleaf-conifer forest; plant species richness; mid mountain region; Dayaoshan state natural reserve;
Abstract: 【Objective】Plant species diversity of mixed broadleaf-conifer forest in mid mountain region of Dayaoshan state natural reserve was studied in order to illustrate their forming mechanism,changing law and maintaining regimes.【Methods】Twelve investigation plots(20m×20m)were established based on all-round survey to study the plant community composition,diversity and changing law of the mixed broadleaf-conifer forest in mid mountain region.【Results】There were 94 species falling into 56 families and 76 genera in the Cathaya argyrophylla mixed forest,103 species belonging to 51 families and 78 genera in the Tsuga longibracteata mixed forest,66 species falling into 30 families and 43 genera in the Pinus kwangtungensis mixed forest,and 49 species falling into 29 families and 38 genera in the Podocarpus wangii mixed forest.The dominant species were Cathaya argyrophylla(IV:34.86),Tsuga longibracteata(47.70),Pentaphylax euryoides(27.69)and Rhododendron faithiae(18.07)in the Cathaya argyrophylla mixed forest; Tsuga longibracteata(63.44),Pentaphylax euryoides(51.03)and Exbucklandia populnea(13.24)in the Tsuga longibracteata mixed forest;Pinus kwangtungensis(43.19),Pentaphylax euryoides(59.09),Polyspora axillaris(44.49)and Exbucklandia populnea(26.10);Podocarpus wangii(58.22),Fokienia hodginsii(32.89)and Rhododendron simiarum(66.31)in the Podocarpus wangii mixed forest.There was no significant difference in species richness in the tree layers of the four mixed forests in mid mountain(P >0.05),however significant difference existed between the woody and herbaceous layer(P <0.05).There was on significant difference in plant diversity index in the tree and shrub layers(P >0.05).The species diversity index of herbaceous layer in Tsuga longibracteata mixed forest significantly higher than that in the Pinus kwangtungensis mixed forest(P <0.05),and there were no significant differences in the other forests(P > 0.05).【Conclusion】This study suggested that the special climate and soil condition are primary cause of the formation of mixed broadleaf-conifer forest in the mid mountain,while the ecological and biological characters of the main conifer and broad-leaf tree species are critical for the maintaining of the species diversity.
Pages: 600-605+611
Year: 2015 Issue: 6
Journal: Guangxi Sciences
Keyword: mixed broadleaf-conifer forest; plant species richness; mid mountain region; Dayaoshan state natural reserve;
Abstract: 【Objective】Plant species diversity of mixed broadleaf-conifer forest in mid mountain region of Dayaoshan state natural reserve was studied in order to illustrate their forming mechanism,changing law and maintaining regimes.【Methods】Twelve investigation plots(20m×20m)were established based on all-round survey to study the plant community composition,diversity and changing law of the mixed broadleaf-conifer forest in mid mountain region.【Results】There were 94 species falling into 56 families and 76 genera in the Cathaya argyrophylla mixed forest,103 species belonging to 51 families and 78 genera in the Tsuga longibracteata mixed forest,66 species falling into 30 families and 43 genera in the Pinus kwangtungensis mixed forest,and 49 species falling into 29 families and 38 genera in the Podocarpus wangii mixed forest.The dominant species were Cathaya argyrophylla(IV:34.86),Tsuga longibracteata(47.70),Pentaphylax euryoides(27.69)and Rhododendron faithiae(18.07)in the Cathaya argyrophylla mixed forest; Tsuga longibracteata(63.44),Pentaphylax euryoides(51.03)and Exbucklandia populnea(13.24)in the Tsuga longibracteata mixed forest;Pinus kwangtungensis(43.19),Pentaphylax euryoides(59.09),Polyspora axillaris(44.49)and Exbucklandia populnea(26.10);Podocarpus wangii(58.22),Fokienia hodginsii(32.89)and Rhododendron simiarum(66.31)in the Podocarpus wangii mixed forest.There was no significant difference in species richness in the tree layers of the four mixed forests in mid mountain(P >0.05),however significant difference existed between the woody and herbaceous layer(P <0.05).There was on significant difference in plant diversity index in the tree and shrub layers(P >0.05).The species diversity index of herbaceous layer in Tsuga longibracteata mixed forest significantly higher than that in the Pinus kwangtungensis mixed forest(P <0.05),and there were no significant differences in the other forests(P > 0.05).【Conclusion】This study suggested that the special climate and soil condition are primary cause of the formation of mixed broadleaf-conifer forest in the mid mountain,while the ecological and biological characters of the main conifer and broad-leaf tree species are critical for the maintaining of the species diversity.
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