草业科学
草業科學
초업과학
PRATACULTURAL SCIENCE
2009年
11期
32-36
,共5页
分类%排序%环境解释%荆条%太行山
分類%排序%環境解釋%荊條%太行山
분류%배서%배경해석%형조%태행산
classification%ordination%environmental interpretation%Vitex negundo var. heterophylla%Taihang Mountain
以太行山南段峡谷区荆条Vitex negundo群落为对象,沿不同海拔布置样方,应用TWINSPAN和DCA相结合的方法,对样方进行数量分类和排序,并进行了环境解释.TWINSPAN等级分类把47个样方分为11个群丛,DCA排序结果同TWINSPAN分析结果相吻合.DCA结果揭示出,其中第一轴显著地反映出各个群系的坡向变化趋势,而第二轴则反映出坡度的梯度变化,表明样方所在地的坡向和坡度是决定群丛分布的主要环境因素.
以太行山南段峽穀區荊條Vitex negundo群落為對象,沿不同海拔佈置樣方,應用TWINSPAN和DCA相結閤的方法,對樣方進行數量分類和排序,併進行瞭環境解釋.TWINSPAN等級分類把47箇樣方分為11箇群叢,DCA排序結果同TWINSPAN分析結果相吻閤.DCA結果揭示齣,其中第一軸顯著地反映齣各箇群繫的坡嚮變化趨勢,而第二軸則反映齣坡度的梯度變化,錶明樣方所在地的坡嚮和坡度是決定群叢分佈的主要環境因素.
이태행산남단협곡구형조Vitex negundo군락위대상,연불동해발포치양방,응용TWINSPAN화DCA상결합적방법,대양방진행수량분류화배서,병진행료배경해석.TWINSPAN등급분류파47개양방분위11개군총,DCA배서결과동TWINSPAN분석결과상문합.DCA결과게시출,기중제일축현저지반영출각개군계적파향변화추세,이제이축칙반영출파도적제도변화,표명양방소재지적파향화파도시결정군총분포적주요배경인소.
The ecological relationship of species, community and environment of Vitex negundo var. heterophylla communities were studied by using TWINSPAN and DCA. The results of TWINSPAN indicates that the communities could be classified into 13 associations. The classification matrix indicates two environmental gradients, light intensity and soil humidity. The gathered groups of plant quadrates in the space of DCA ordination are consistent with the result of TWINSPAN, which revealed a relationship between plant formations and environmental gradients.The first axis of the two-dimensional ordination diagram of DCA obviously reflects the trend of aspect. The second axis expresses the gradient changes of slope. It is considered that the major factors that restrict the formation distribution of the mountain are aspect and slope.