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群落谱系结构包含群落发育的历史信息,能从新的角度反映群落形成的生态过程。作者在浙江古田山自然保护区亚热带常绿阔叶林中选择了人为干扰强度不同的4种群落类型,以20m×20m为研究尺度探讨了不同干扰程度对群落谱系结构的影响。结果表明,人工林(类型I)谱系结构发散;但间伐林(类型II)、自然恢复林(类型III)以及自然老龄林(类型IV)谱系结构聚集,且以类型II和IV聚集度最高。进一步分析不同径级谱系结构发现,在中小径级(DBH≤5cm和5cm10cm时,除了类型IV,其他3种群落都是谱系结构发散,这反映了在恢复早期种子扩散对这些林型群落构建影响较大;而皆伐后的演替和间伐增加了群落生境异质性,生境过滤作用增强,使类型II、III群落中小径级谱系结构表现为聚集;类型IV群落不同径级谱系结构均表现为聚集,可能与其稳定的生境过滤作用有关。
The community pedigree structure contains the historical information of community development and can reflect the ecological process of community formation from a new perspective. The authors selected four community types with different disturbance intensities in the subtropical evergreen broad-leaved forest in Gutian Mountain Nature Reserve, Zhejiang Province, China. The impacts of different disturbance levels on the phylogenetic structure of the community were discussed based on the 20 m × 20 m scale. The results showed that the plantation (type I) phylogenetic structure diverged; however, the thinning forest (type II), the natural recovery forest (type III) and the natural aged forest (type IV) had aggregations of phylogenetic structures with the highest concentration of type II and IV. Further analysis of lineage structures of different diameter classes found that the phylogenetic structures of type II, III and IV communities clustered at the middle and small diameter classes (DBH ≤ 5 cm and 5 cm 10 cm, In addition to Type IV, the other three communities diverged from the pedigree, reflecting the greater impact of seed dispersal on the establishment of these forest communities in the early restoration stage. Succession and thinning after clear cutting increased the community heterogeneity, The filtering effect was enhanced, which led to the clustering of path-size lineages in type II and III communities. The aggregates of different diameter-scale lineages in type IV communities may be related to their stable habitat filtration.