粤北与粤东北部分自然保护区森林群落的相似性探讨

利用样方调查法 ,对地处粤北和粤东北的乐昌大瑶山、乐昌十二度水 -杨东山、英德滑水山、连平黄牛石、和平黄石坳以及蕉岭长潭等地的植被优势科和优势种进行了比较研究。结果表明 ,各地植被的共有优势科为壳斗科、樟科、山茶科、金缕梅科、杜鹃花科等 ,与它们所处的中亚热带地理位置相适应 ,但优势种类及其优势度有差异。群落的相似性系数以黄石坳与长潭之间的 44.97%为最大 ;黄石坳与大瑶山之间的1 0 96%为最低 ,提示和平黄石坳可能是广东植被区划东西分区的一个关键地区。

A preliminarily study on similarity of some reserves forest communities in north and northeast of Guangdong Province,China

By using the quardat method,the dominate families and species of the forest vegetation at the Dayao Shan of Lechang city,the Shi'erdushui-Yangdong Shan of Lechang city,the Huashui Shan of Yingde city,the Huangniushi of Lianping city,Huangshi'ao of Heping county,and the Changtan of Jiaoling county are compared in this paper. The results show that the common dominant families are Fagaceae,Theaceae,Hamamelidaceae,Eriaceae,etc.,and coincidence with the subtropical location. But the dominant species and their dominance are different from each plot site. The biggest similarity coefficient of communities is 44.97% between Huangshi'ao and Changtan, while the lowest is 10.93% between Huangshi'ao and Dayao Shan. This suggests that the Huangshi'ao of Heping county maybe the key region of vegetation regionalization of east to west in Guangdong Province.