福建武平米槠林恢复生态学研究

摘要/Abstract

摘要： 从优势种、分布格局、种丰富度和群落间种相似系数角度,探讨不同人为干扰尺度对福建武平米槠林恢复的影响.结果表明,随着人为干扰尺度(A级择伐更新、B级天然更新、C级人工促进天然更新和D级杉木林)的加大,顶极种米槠重要值、不同人为干扰群落与天然米槠群落种相似系数随之降低,降至D级分别为0和40%;而米槠分布格局(聚集强度)和种丰富度随之上升,升至B级或C级后显著下降.据此可见,A级属于轻度干扰,现已恢复;B级属于中度干扰,将很快恢复;C级虽然顶极种米槠处于第二优势种,阳性树种裂斗锥处于第一优势种,但种丰富度达到最大值,属中度干扰,但恢复时间要较B级略长;D级属于强度干扰,目前较难恢复到米槠顶极群落.

关键词: 米槠林, 人为干扰尺度, 恢复生态, 干旱胁迫, 根序, 细根, 刨花楠, 氮添加

Abstract: Analyses on the effects of the different scales of human disturbance on restoration of Castanopsis carelesii forest in Wupin,Fujian indicated that with increasing degrees of the scales of human disturbance (A class, regeneration by selected cutting; B class, natural regeneration;Cclass,natural regeneration promoted by artificial tending;D class,Chinese fir forest),the important value of Castanopsis carlesii and the similar index between the communities decreased,and the assembling and abundance degrees of species increased under disturbance of B or C class,and decreased under D class.It could be concluded that the disturbance of A class was light,that of B class was medium and could be restored rapidly,disturbance of C class was also medium but would be restored in a longer period,and that of D class w as difficult to be restored due to the intense disturbance.

Key words: Castanopsis carlesii forest, Scales of human disturbance, Restoration ecology, Machilus pauhoi, nitrogen addition, fine root, drought stress, root order

中图分类号:

S718

游水生. 福建武平米槠林恢复生态学研究[J]. 应用生态学报, 2002, (12): 1533-1536.

YOU Shuisheng . Ecological restoration of Castanopsis carlesii forest in Wupin, Fujian[J]. Chinese Journal of Applied Ecology, 2002, (12): 1533-1536.

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