学术
浙江六十田自然保护小区常绿阔叶林群落特征及优势乔木种的动态
刘鹏[1,2] 康华靖[1,2] 陈子林[3] 张志祥[1,2] 韦福民[3] 楼中华[1,2]
[1]浙江师范大学生态研究所,浙江金华321004 [2]浙江师范大学植物学实验室,浙江金华321004 [3]大盘山国家级自然保护区管理局,浙江磐安322300
摘 要:
对浙江省磐安县六十田省级自然保护小区常绿阔叶林的群落结构特征及其主要乔木树种的种群动态进行了调查研究．根据各树种的重要值判断，该地区常绿阔叶林的主要乔木组成种为东南石栎（Lithocarpus harlandii）、红楠（Machilus thunbergii）、木荷（Schima superba）、米槠（Castanopsis carlesii）、青冈（Cyclobalanopsis glauca）、紫楠（Phoebe sheareri）和华东楠（Machilus leptophylla），其中东南石栎和木荷为主要优势种．群落中乔木层、灌木层、草本层及藤本的物种丰富度、多样性、均匀度都偏低，优势度相对较高；其生活型以包括藤本在内的高位芽植物占绝对优势，达85．45％；叶级以中型叶为主（占61，82％），小型叶次之（占29．09％）；叶型以单叶占有较大的优势，达到89．09％；叶质以革质叶占优势（56．36％），纸质叶次之（40．00％）．生活型及叶的特征表明该群落属于中亚热带常绿阔叶林．群落中主要乔木树种水平结构整体上呈均匀分布状态，说明群落中种内和种间竞争激烈．依据胸径级别频率分布的形状，7个主要组成种的种群结构可以大致归纳为：倒金字塔型、倒“J”型、纺锤型和双峰型．其中，种群结构呈倒金字塔型的东南石栎、米槠、青冈和紫楠及呈纺锤型的华东楠，因为缺乏幼苗和幼树，在演替过程中种群将衰退；而呈双峰型的红楠和呈倒“J”型的木荷，因有较为丰富的幼苗储备而将成为该群落的优势种．[著者文摘]
文章出处:
《浙江师范大学学报：自然科学版》-2007年30卷2期 -128-134页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1001-5051（2007）02-0128-07
The community features of evergreen broad-leaved forest and the population dynamics of dominant species in Liushitian Nature Reserve of Zhejiang Province
LIU Peng, KANG Huajing, CHEN Zilin, ZHANG Zhixiang, WEI Fumin, LOU Zhonghua（ 1. Institute of Ecology, Zhejiang Normal University, Jinhua Zhejiang 321004, China; 2. Key Laboratory of Botany, Zhejiang Normal University, Jinhua Zhejiang 321004, China; 3. The Administration Bureau of Dapanshan Natural Reserve, Pan＇an Zhejiang 322300, China）
Abstract:
Broad-leaved evergreen forest is a zonal vegetation type and an important part of land ecosystems in subtropics of the world. Based on the data collected from sample plots, the species composition, physiognomy of the community, the spatial distribution and population structure of the dominant species in the evergreen broad-leaved forest in Liushitian Natural Reserve of Zhejiang Province were analysed. The results showed that there were 7 dominant species： Lithocarpus harlandii, Machilus thunbergii, Schima superba, Cyclobalanopsis glauca, Castanopsis carlesii, Phoebe sheareri and Machilus leptophylla, in the evergreen broad-leaved forest in term of the importance value of species. P. brevicaudata and S. superba were the major dominant species in the community. The richness index, biodiversity index and evenness index were on the low side, except ecological dominance index. Phanerophytes occupied a dominant position in the community with a percentage was 85.45% among all life forms; the dominant leaf size was mesophyll whose percentage was 61.82%, followed by microphyll （ 29.09% ） ; single leaves were dominant in leaf form and the percentage of those was 89.09%. Researches showed that this community belonges to mid-subtropical evergreen broad-leaved forest. Because of intra-specific and inter-specific competition, the spatial patterns of the major species in the forest conformed to a random distribution. The population structures of the dominant species were categorized into four regeneration types： inverse pyramid-shaped, inverse J-shaped, spindle-shaped and double peak-shaped, based on their diameter at breast height （ DBH） frequency distribution patterns. The species that belong to the inverse pyramid- shaped and spindle-shaped would be in decline due to lack of seedlings. M. thunbergii and Schima superba, which had abundant seedlings, would be dominant species in the future.[著者文摘]
Key words:
evergreen broad-leaved forest; community; dominant species; population dynamic
基金资助:
浙江省自然科学基金资助项目（399277）;金华市科技重点项目（2005-1-318）
更多>>免费文章
cqvip.com