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( Naw M L Thant ),( Jasson R M John ),( Woo Shin Lee ),( Victor Kteplyakov ),( Zar Chi Hlaing ) 한국임학회 2012 한국임학회 학술발표논문집 Vol.2012 No.-
Species composition, diversity and stand structure generally vary along elevational gradient, although this may differ from one region to another depending on aspects and physical characteristics on a particular mountain. Understanding these variations may be essential in design of conservation strategies, for example, restoration. Between July and August 2010, we carried out vegetation study in Popa Mountain Park to investigate the variation of forest stand characteristics along elevational gradient. We established a total of 46 vegetation sample plots (30 x 30 m) at three elevation ranges (low; 301-600 m, mid; 601-900 m and high; > 900 m). A total of 93 tree species of 41 families were recorded. Overall tree density varied from 220 to 517 trees ha-1and basal area, consequently, from 5.0 to 20.8m2 ha-1. The higher the elevation, the higher tree density and basal area, whereas the highest species diversity and richness were observed in mid elevation stands. Sapling and seedling densities were recorded low in high elevation. Mid and low elevation were more similar in terms of species composition (62 %) while high and low elevation had the lowest similarity (19 %). Stand structures of all elevation ranges showed reverse J -shaped curves indicating that the stands had a growing and healthy population structure. Only few species were dominant in the high elevation stands in comparison to other elevation stands. Apart from topographic influences and varying microclimates along the elevation, there is little doubt that human disturbance is also influencing forest stand characteristics in Popa Mountain Park.