林业调查规划
林業調查規劃
임업조사규화
FOREST INVENTORY AND PLANNING
2013年
5期
23-31
,共9页
石灰山季雨林%群落动态%物种组成%群落结构%西双版纳
石灰山季雨林%群落動態%物種組成%群落結構%西雙版納
석회산계우림%군락동태%물충조성%군락결구%서쌍판납
limestone monsoon forest%community dynamics%species composition%community patern%Xishuangbanna
基于1995年和2011年固定样地调查数据探讨西双版纳四数木-闭花木-多花白头树群落种类组成、群落结构及优势种群个体数量方面的变化。分析显示，群落内高等植物种数净减5种（新增4种，消失9种），热带分布型科、属比率分别上升7.3％和2％；A、B、C、D 4层原有乔木（DBH≥5 cm）个体死亡率分别为0％、44.4％、16.3％和60％；A、B 2层乔木个体比例下降2.5％。乔木种群的频度分布格局和构造种群比例维持不变；群落乔木立木级结构保持正金字塔型，优势种群的立木级分布格局无明显变化。研究表明，该群落发育处于较为成熟阶段；15年来群落乔木的优势成分保持不变，群落总体结构稳定，草本层和层间植物的种类和个体数量减少明显；优势树种中，四数木和多花白头树2个种群趋于衰退，油朴有取代四数木或多花白头树在林冠层优势地位的趋势。
基于1995年和2011年固定樣地調查數據探討西雙版納四數木-閉花木-多花白頭樹群落種類組成、群落結構及優勢種群箇體數量方麵的變化。分析顯示，群落內高等植物種數淨減5種（新增4種，消失9種），熱帶分佈型科、屬比率分彆上升7.3％和2％；A、B、C、D 4層原有喬木（DBH≥5 cm）箇體死亡率分彆為0％、44.4％、16.3％和60％；A、B 2層喬木箇體比例下降2.5％。喬木種群的頻度分佈格跼和構造種群比例維持不變；群落喬木立木級結構保持正金字塔型，優勢種群的立木級分佈格跼無明顯變化。研究錶明，該群落髮育處于較為成熟階段；15年來群落喬木的優勢成分保持不變，群落總體結構穩定，草本層和層間植物的種類和箇體數量減少明顯；優勢樹種中，四數木和多花白頭樹2箇種群趨于衰退，油樸有取代四數木或多花白頭樹在林冠層優勢地位的趨勢。
기우1995년화2011년고정양지조사수거탐토서쌍판납사수목-폐화목-다화백두수군락충류조성、군락결구급우세충군개체수량방면적변화。분석현시，군락내고등식물충수정감5충（신증4충，소실9충），열대분포형과、속비솔분별상승7.3％화2％；A、B、C、D 4층원유교목（DBH≥5 cm）개체사망솔분별위0％、44.4％、16.3％화60％；A、B 2층교목개체비례하강2.5％。교목충군적빈도분포격국화구조충군비례유지불변；군락교목립목급결구보지정금자탑형，우세충군적립목급분포격국무명현변화。연구표명，해군락발육처우교위성숙계단；15년래군락교목적우세성분보지불변，군락총체결구은정，초본층화층간식물적충류화개체수량감소명현；우세수충중，사수목화다화백두수2개충군추우쇠퇴，유박유취대사수목혹다화백두수재림관층우세지위적추세。
The dynamic changes of Cleistanthus sumatranus , Tetrameles nudiflora, Garuga floribunda on the composition, structure, and population of dominant tree species community in limestone monsoon for-est of Xishuangbanna has been carried out .The results based on the investigations of 1995 and 2011 showed that the community had a pure loss of five vesicular plant species (9 species disappeared, 4 spe-cies recruited).Percentages of the families and genera with tropical affinity have increased respectively by 7.3%and 2%.Mortalities of the tree stems (DBH≥5cm) in Layer A, B, C and D was up to 16.7%, 3, 6%, 14.3%and 30.6% respectively.The proportion of the tree stems in layer A and B declined by 2.5%.Frequency distribution pattern of the tree populations and the proportion of “construc-tion populations” in the community remain same.Structure of diameter classes of the tree stems in com-munity maintained pyramid-shape and no significant change occurred in the distribution pattern of diame-ter classes for the dominant populations .The study also revealed that the community was in a fairly ma-ture developed stage.Within the 15 years, the prevailing composition of the community kept same;the general structure of the community was stable .Richness of species and number of individuals for the herbs and inter-layer plants has been declined evidently .The population of two dominant species (Tetra-meles nudiflora, Garuga floribunda) trended to decline which implied that, in the long run, Celtis wightii would probably replace Tetrameles nudiflora and Garuga floribunda in the canopy layer.
