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Tree Population Dynamics of Three Altitudinal Vegetation Communities on Mount Cameroon(1989-2004)

Journal of Mountain Science 2011年第4期8卷 495-504页

作者： Philip F.FORBOSEH Terry C.H.SUNDERLAND James A.COMISKEY michael balinga Plan Cameroon P O Box 25236 MessaYaoundéCameroon Centre for International Forestry Research(CIFOR) Inventory and Monitoring Program National Park Service120 Chatham Lane Smithsonian Institution S.Dillon Ripley Center1100 JeffersonDrive SW Washington DC 20560USA Center for International Forestry Research(CIFOR)

Changes in permanent sample plots in the lowland,submontane and montane forests on Mount Cameroon(4,095 m above sea level),an active volcano,are described for 15 years from 1989 to *** the study period,the stocking level of trees with a diameter at breast height(DBH) ≥ 10 cm in the three forests were lower than in pan-tropical stands suggesting a significant impact of volcanic and human-related activities on the vegetation communities on the *** mortality rates in the submontane and montane forests were consistent with those reported for comparable altitudinal ranges in the Blue Mountains of *** annual mortality rate was higher in the lowland forest than other lowland sites *** between recruitment and mortality rates was large suggesting that the three vegetation communities have not reached their *** seven-year difference in half-life of large trees(with a DBH ≥ 50 cm) in the submontane and montane forests suggests an altitudinal effect on turnover of larger trees that in turn contributes to the frequent small stature of high altitude *** was little evidence of an altitudinal effect on species turnover and growth *** finding supports generalizations about the zero effect of growth on the stature of high altitude *** forest dynamics is crucially important in the management of tropical montane environmentsand in this instance particularly so given the recent creation of the Mount Cameroon National Park.

关键词：植被群落高海拔喀麦隆活火山种群动态山地森林树木胸径热带山地

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