CAJ | 학술논문

【目的】通过对大明山南亚热带山地常绿阔叶林85个林隙的调查,了解南亚热带山地常绿阔叶林林隙的基本特征和自然干扰规律。【方法】在大明山3.2hm2永久样地内仔细寻找每一个林隙,记录林隙形成木的种类,测量其胸径和高度,判断林隙形成木和林隙的年龄,绘制树冠投影图。【结果】扩展林隙(EG)和冠空隙(CG)在南亚热带山地常绿阔叶林中的面积比例分别为71.70%和52.90%,干扰频率分别为1.793%·a-1和1.323%·a-1,林隙干扰的返回间隔期约为76a。南亚热带山地常绿阔叶林中,由树木翻蔸形成的林隙最为普遍,占51.88%,其次是干中折断而形成的,占37.88%。林隙大多由0~1株树木形成,平均每个林隙拥有形成木3.45株。EG的大小多在200~600m2,其中以200~300m2者所占的面积比例最大(占56.47%)；CG的大小多在200m2以下,以100~200m2者所占的面积比例最大(占37.65%)。大部分林隙是在2年前形成的,占68.40%。林隙形成木种类超过42种,主要是云贵山茉莉(Huodendron biaristatum )、罗浮槭(Acer fabri )、栓皮木姜子(Litsea suberosa)、百色猴欢喜(Sloaneachingiana)、刨花润楠(Machiluspauhoi)、天目紫茎(Stewartiagemmata)、糙皮桦(Betula utilis )和罗浮柿(Diospyros morrisiana ),占形成木个体数的68.51%。林隙形成木分布最多的径级在15~20cm。【结论】南亚热带山地常绿阔叶林林隙特征不同于热带山地雨林,也与南亚热带低地的常绿阔叶林存在显著区别。2008年特大冰冻干扰是造成大明山山地常绿阔叶林林隙分异的主要因素。
【목적】통과대대명산남아열대산지상록활협림85개림극적조사,료해남아열대산지상록활협림림극적기본특정화자연간우규률。【방법】재대명산3.2hm2영구양지내자세심조매일개림극,기록림극형성목적충류,측량기흉경화고도,판단림극형성목화림극적년령,회제수관투영도。【결과】확전림극(EG)화관공극(CG)재남아열대산지상록활협림중적면적비례분별위71.70%화52.90%,간우빈솔분별위1.793%·a-1화1.323%·a-1,림극간우적반회간격기약위76a。남아열대산지상록활협림중,유수목번두형성적림극최위보편,점51.88%,기차시간중절단이형성적,점37.88%。림극대다유0~1주수목형성,평균매개림극옹유형성목3.45주。EG적대소다재200~600m2,기중이200~300m2자소점적면적비례최대(점56.47%)；CG적대소다재200m2이하,이100~200m2자소점적면적비례최대(점37.65%)。대부분림극시재2년전형성적,점68.40%。림극형성목충류초과42충,주요시운귀산말리(Huodendron biaristatum )、라부축(Acer fabri )、전피목강자(Litsea suberosa)、백색후환희(Sloaneachingiana)、포화윤남(Machiluspauhoi)、천목자경(Stewartiagemmata)、조피화(Betula utilis )화라부시(Diospyros morrisiana ),점형성목개체수적68.51%。림극형성목분포최다적경급재15~20cm。【결론】남아열대산지상록활협림림극특정불동우열대산지우림,야여남아열대저지적상록활협림존재현저구별。2008년특대빙동간우시조성대명산산지상록활협림림극분이적주요인소。
[Objective]Through field investigation of 85 gaps in 3.2hm2 permanent plots of the south subtropical montane evergreen broadleaved forest in Damingshan Nature Reserve of Guangxi Province,this paper deals with gap characteristics and their natural disturbance re-gimes in south subtropical montane evergreen broadleaved forest of Guangxi Province.[Meth-ods]Every gap in 3.2hm2 permanent plots of the south subtropical montane evergreen broad-leaved forest was carefully investigated.Tree species,DBH (diameter at breast height)and height were recorded in the gaps,and then the age was determined for both the trees growing in gaps and the gap-formation.Finally,the canopy coverage picture was drawn.[Results]The area percentage of expanded gap (EG)and canopy gap (CG)in the forest landscape is 71.70% and 52.90%,respectively.The natural disturbance frequency for EG and CG is 1 .7 9 3%·a-1 and 1 . 323%·a-1 ,respectively,and the return interval of canopy gaps is about 76a.The most popular manner of gap formation in the forest was up-roots (51.88% of the total),and the second one was breakage on trunk (37.88%).Most gaps were formed by zero and one tree,averaging 3 . 45 trees per gap.The size of most EG was in the range of 200~600m2 ,and the gaps of 200~300m2 occupied the biggest percentage in area (56. 47% of the total).The size of most CG was under 200m2 ,and the gaps of 100~200m2 had the biggest percentage in area (37.65% of the total).Most of the gaps were formed 2 years ago (68.40% of the total).Over 42 wood species were found in gaps,of which dominant species were Huodendron biaristatum,Acer fabri,Litsea suberosa,Sloanea chingiana,Machilus pauhoi,Stewartia gemmata,Betula utilis and Diospyros morrisiana ,and their individuals oc-cupied 68.51% of the total ones.The DBH of most trees growing in gaps was 15~20cm.[Con-clusion]The gap characteristics and their natural disturbance regimes in south subtropical mon-tane evergreen broadleaved forest in Damingshan Nature Reserve revealed significant difference with those in tropical montane rain forest of Hainan Island and the south subtropical evergreen broadleaved forest in Heishiding Reserve of Guangdong Province,and a severe ice storm dam-age in 2008 was a main cause.