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常绿阔叶林是我国亚热带地区的地带性植被,其中最为典型而且分布最广泛的是中亚热带常绿阔叶林。为探讨2008年初我国南方发生的冰雪灾害对中亚热带常绿阔叶林的影响,以浙江省古田山国家级自然保护区24 ha森林动态监测样地内的中亚热带常绿阔叶林为例,研究了该森林在冰雪灾害前后(2005–2010年)的群落结构及物种组成动态。结果表明,群落径级结构变化较小,但群落整体补员不足且死亡率较高;多个粒度上的群落动态显示出一致的衰退特征,但不同生境间的群落动态存在差异;物种多度和胸高截面积多呈减小趋势,但频度和重要值变化不明显。同时,物种的多度、胸高截面积、频度和重要值等次序均无明显变化。这说明2008年发生的冰雪灾害对古田山中亚热带常绿阔叶林群落的短期动态产生了较大的负面影响,且其影响程度与植物胸径和地形等因素密切相关;同时也反映了古田山中亚热带常绿阔叶林群落结构对冰雪灾害干扰具有一定的抵抗力。
Evergreen broad-leaved forests are the zonal vegetation in the subtropical regions of China. Among them, the most typical and most widely distributed is the evergreen broad-leaved forest in the subtropics. In order to explore the impact of snow disasters on the subtropical evergreen broad-leaved forest in southern China in early 2008, a case study of the subtropical evergreen broad-leaved forest in 24 ha forest dynamic monitoring plots in Gutianshan National Nature Reserve, Zhejiang Province The community structure and species composition dynamics of the forest before and after the snow disaster (2005-2010). The results showed that the structure of community size and structure was relatively small, but the total community members were not enough and the mortality rate was high. The community dynamics on multiple granularities showed consistent decline characteristics, but there were differences in community dynamics among different habitats. Species abundance And chest height cross-sectional area showed a decreasing trend, but the frequency and importance changes are not obvious. At the same time, there was no significant change in the order of abundance, height and cross section, frequency and importance of species. This shows that the snow disaster in 2008 had a great negative impact on the short-term dynamics of the subtropical evergreen broad-leaved forest community in Gutian Mountain, and its influence degree was closely related to the plant diameter and topography. At the same time, it also reflected the Gutian Mountain subtropical The community structure of evergreen broad-leaved forest has a certain resistance to the disasters of snow disaster.