摘要
四川省王朗自然保护区是大熊猫的重要栖息地,1976年该地区发生了震级为7.2和6.7级地震(松潘-平武大地震),给该地区森林植被造成了不同程度的破坏。通过对地震遗迹的植被调查,研究了地震后不同干扰强度下,恢复群落的物种组成及多样性特征。结果表明:受地震干扰较严重的群落(群落E1)缺失乔木层,在灌木和草本层中主要由阳性先锋物种幼树、幼苗及部分灌木和草本组成;干扰较轻的群落(群落E2)乔木层物种组成与未受破坏的对照原始林(群落F)相似,但还包含部分先锋物种,而在灌木和草本层物种组成上与群落F没有明显差异;群落E1中植物的科、属及种的丰富度显著低于群落E2和群落F,而后两者之间没有显著差异。3种群落类型间的物种组成及多样性差异是由不同的地震干扰强度造成的。
Wanglang Nature Reserve is one of the important protected regions for Giant Panda in Sichuan Province, China However, this nature reserve is located in the area susceptible to earthquake. In 1976, two shallow earthquakes, 7.2 and 6.7 respeetively, sequentially took plaee in this region. And also in this region, another severe earthquake （8.0） have just happened in August, 2008. The earthquakes caused a variety of influences to the local society and environment, including serious landslides and severe damages to forest vegetation. These damages have lead to serious loss of habitats for Giant Pandas, thus the restoration of forest vegetation is key for the protection of Giant Pandas. However, the reeovery of vegetations from earthquake disturbance has seldom been examined in this region. In the present study, we investigated the species composition and diversity for eommunities that restored naturally from different disturbances during the 1976＇s earthquakes. Our results showed that： the community recovered from intensive earthquake disturbance （ Community E1 ） was characterized by the lack of tree layer, and the shrub and herb layers were dominated by heliophilous and pioneer species. The species composition of tree layer in the slightly disturbed forest community （ Community E2 ） was similar to that of the primary forest （ Community F）, except that pioneer species were observed in Community E2. The community E2 and F had no significant differences in species composition for shrub and herb layers. The numbers of family, genera and species in Community E1 were significant lower than that of Community E2 and F, and there were no significant difference between Community E2 and Community F. The differences in species composition and diversity among these communities were caused by different disturbance intensity of the earthquake.
出处
《生态学报》
CAS
CSCD
北大核心
2008年第12期5848-5855,共8页
Acta Ecologica Sinica
基金
国家林业局保护司资助项目(AT0410)
"十一五"科技支撑资助项目(2008BADB0B04)~~
关键词
地震
干扰
恢复群落
物种多样性
earthquake
disturbance
restoration community
species diversity
