CAJ | 학술논문

【目的】通过对大明山南亚热带山地常绿阔叶林72个400m2样地的调查，了解特大冰冻干扰对南亚热带山地常绿阔叶林树冠和林冠状况的影响。【方法】2009年，在大明山海拔934~1223m 的范围内，按上、中、下坡设立3组调查样地，每一组样地包括24个20m×20m样方，对胸径≥5cm的林木进行调查，记录种名、胸径、树高、冠长、冠幅、座标及受损类型等。【结果】经统计，在调查的胸径≥5cm 的2538株林木中，有1714株受到不同程度损伤，占总数的67.53%，其中轻度损伤占47.75%、重度损伤占19.78%。总体上，不同坡位的冠损状况相似，均以轻度损伤为主，但表现有所不同，上坡轻度损伤比例最小(40.94%)，严重损伤的比例最高(26.49%)；中坡与之相反，轻度损伤比例最大(52.38%)，严重损伤比例最小(16.52%)；下坡损伤比例最低。胸径影响树木的受损类型和程度，呈现出随着胸径的增加，树冠受损的比例逐渐增大，并在30~40cm 径级(上坡)和40~81cm 径级(中坡和下坡)达到最大值。断枝比例(包括断枝少和断枝多)随胸径增大而增大，而断梢和失冠则随胸径增大而减小。落叶树种比常绿树种受损更重。冰冻灾害后，林冠叶面积指数显著下降，散射透光系数和直射透光系数显著增加。【结论】特大冰冻干扰对大明山常绿阔叶林已造成严重影响，受冰冻灾害的长期影响，大明山常绿阔叶林的树冠和林冠状况发生了显著的变化，由半圆球形树冠演变为狭窄的圆柱形树冠，以适应冰冻干扰和气候变化的影响。
【목적】통과대대명산남아열대산지상록활협림72개400m2양지적조사，료해특대빙동간우대남아열대산지상록활협림수관화림관상황적영향。【방법】2009년，재대명산해발934~1223m 적범위내，안상、중、하파설립3조조사양지，매일조양지포괄24개20m×20m양방，대흉경≥5cm적림목진행조사，기록충명、흉경、수고、관장、관폭、좌표급수손류형등。【결과】경통계，재조사적흉경≥5cm 적2538주림목중，유1714주수도불동정도손상，점총수적67.53%，기중경도손상점47.75%、중도손상점19.78%。총체상，불동파위적관손상황상사，균이경도손상위주，단표현유소불동，상파경도손상비례최소(40.94%)，엄중손상적비례최고(26.49%)；중파여지상반，경도손상비례최대(52.38%)，엄중손상비례최소(16.52%)；하파손상비례최저。흉경영향수목적수손류형화정도，정현출수착흉경적증가，수관수손적비례축점증대，병재30~40cm 경급(상파)화40~81cm 경급(중파화하파)체도최대치。단지비례(포괄단지소화단지다)수흉경증대이증대，이단소화실관칙수흉경증대이감소。락협수충비상록수충수손경중。빙동재해후，림관협면적지수현저하강，산사투광계수화직사투광계수현저증가。【결론】특대빙동간우대대명산상록활협림이조성엄중영향，수빙동재해적장기영향，대명산상록활협림적수관화림관상황발생료현저적변화，유반원구형수관연변위협착적원주형수관，이괄응빙동간우화기후변화적영향。
[Objective]Through field investigation of 72 permanent plots (each 400m2 )of the south subtropical montane evergreen broad-leaved forest in Damingshan Nature Reserve of Guangxi province,this paper deals with the effects of a severe ice storm disturbance on the crown and canopy condition of south subtropical montane evergreen broad-leaved forest in Guan-gxi province.[Methods]In 2009,3 groups of plots were set up in the ice storm-damaged mon-tane evergreen broad-leaved forest in Damings-han National Nature Reserve,with altitude ranged from 934m to 1223m,and divided into upper slope,middle slope and lower slope,where each group was further divided into 40 sub-plots and each had the plot of 400m2 .Within each subplot,all trees that their diameter at breast height (DBH)was equal to or larger than 5.0cm were identified,mapped and tagged at breast height (1.3m from the base)with pre-numbered aluminum tags,and then the DBH,stem heights,crown length,crown width,damage type of these taged trees were measured.[Results]The evergreen broad-leaved forest of Damingshan National Nature Reserve were affected se-verely by the ice storm as the damaged trees accounted for 67.53% of the total individuals with DBH≥5.0cm.Among of them slightly damaged individuals accounted for 47.75% and severely damaged ones accounted for 19.78%.The ratio of slightly damaged trees was minimum at up-per slope (40.94%)while it was maximum at middle slope (52.38%).On the contrary,the ra-tio of severely damaged individuals was maximum at upper slope (26.49%)while minimum at middle slope (16.52%).However,the ratio of damaged individuals at lower slope was the most low among the three slope positions.The DBH was a sensitive index influencing the type and extent of tree damage.The more larger the DBH was,the more severe damage the tree crown suffered.The ratio of broken branch (including slight branch loss and severe branch loss)in-creased as the DBH increasing,whereas the breakage within crown and whole-crown loss de-creased with increasing of DHB.The deciduous trees tended to show severe damage than ever-green trees.After ice storm damage,the leaf area index (LAI)was significantly reduced while scattering light transmission coefficient (TD)and direct transmission coefficient (TR)were significantly increased.[Conclusion]This severe ice storm caused severe damage to evergreen broad-leaved forest in Damingshan.The crown and canopy condition of evergreen broad-leaved forest in Damingshan had changed significantly from semi spherical crown to cylindrical narrow-crown in order to adapte ice storm disturbance and climate change.