牯牛降自然保护区浙江桂生境群落及种群结构特征  

Habitat community and population structure of Cinnamomum chekiangense in Guniujiang Nature Reserve

作　　者：王兴龙 程建军 张庆 施皓 方宏明 刘坤[1,3] 邵剑文 WANG Xinglong;CHENG Jianjun;ZHANG Qing;SHI Hao;FANG Hongming;LIU Kun;SHAO Jianwen(College of Life Science,Anhui Normal University,Wuhu 241000,China;Shitai Management Station,Anhui Province Guniujiang National Nature Reserve,Chizhou 245100,China;The Key Laboratory of Conservation and Employment of Biological Resources of Anhui,Anhui Normal University,Wuhu 241000,China)

机构地区：[1]安徽师范大学生命科学学院,芜湖241000 [2]安徽省牯牛降国家级自然保护区石台管理站,池州245100 [3]安徽省重要生物资源保护与利用研究重点实验室,芜湖241000

出　　处：《生态学报》2024年第19期8844-8853,共10页Acta Ecologica Sinica

基　　金：国家自然科学基金项目(32070370);安徽牯牛降国家级自然保护区森林生态系统固定样地监测项目(CZS42023010)。

摘　　要：浙江桂经济价值高,野生资源有限。基于2hm^(2)固定样地调查数据,通过分析其群落特征,编制静态生命表、绘制存活曲线、计算数量动态指数、引入时间序列模型等,研究了安徽省牯牛降国家级自然保护区浙江桂生境群落结构及种群动态特征。结果表明:(1)样地内共记录物种198种,木本以樟科、壳斗科、杜鹃花科为主;(2)甜槠是建群树种,其龄级组成以老龄级(V级)为主(占总株数的78.92%),其它优势种有香桂、马银花、新木姜子等,以幼龄级(Ⅰ和Ⅱ级)为主(占总株数90%以上);(3)浙江桂种群龄级组成呈倒“J”型,幼龄级个体占总数的85.15%,但幼苗转化成体折损率高;(4)时间序列预测分析表明,浙江桂种群未来个体数量呈增加趋势。基于这些研究结果我们提出就地封育保护为主,辅以低龄级幼株的精准抚育管理,以促进其种群的恢复。Cinnamomum chekiangense has high economic value,yet its wild resources are limited.Based on the survey data of a 2 hm^(2) fixed plot,we analyzed the community characteristics,static life table,survival curve,quantity dynamic index,and time series model to reveal the population structure and dynamics of Cinnamomum chekiangense in Guniujiang National Nature Reserve,Anhui Province,China.The results showed that:(1)In total,198 species(161 woody species)were recorded in fixed plot,belonging to 54 families and 96 genera.There were 122 species and 7387 plants of trees,belonging to 46 families and 78 genera.The families with more than 5 species included Lauraceae,Fagaceae,Rhododendroaceae,Rosaceae,Symplocaceae,and Pentagraceae.93 species were shrubs,belonging to 39 families and 62 genera,and 37 species were herbs,belonging to 29 genera and 20 families.(2)Trees with important values exceeding 10%included Castanopsis eyrei(22.42%)and Cinnamomum subavenium(11.1%),shrub dominant species included Cinnamomum subavenium(17.14%)and Camellia cuspidata(17.1%),and herbaceous plants included Liriope graminifolia(13.92%),Arachniodes aristata(13.59%),Dryopteris fuscipes(11.63%)and Ophiopogon bodinieri(11.22%).In trees,Castanopsis eyrei was a constructive species,with its age class mainly composed of aged(V-class)trees,accounting for 78.92%of the total;other dominant species included Cinnamomum subavenium,Rhododendron ovatum,and Neolitsea aurata,which were primarily young(I and II classes)trees,accounting for more than 90%of their respective totals;(3)The population dynamics of Cinnamomum chekiangense V1—V8 were all≥0.When external interference was ignored,the value of Vpi was greater than 0.50,and when external interference was considered,the value V′pi was 0.0257,indicating that its population as a whole belongs to the growth type.The maximum value of random interference(Pmax)in the population was 0.037,indicating its population was high sensitivity to external interference and poor adaptability to environmental changes.The age

关 键 词：浙江桂 种群结构 静态生命表 存活曲线 时间序列模型 保护策略 

分 类 号：Q948[生物学—植物学]