Phenology and Seasonal Variability of Understory Herbs in Broad-leaved Korean Pine Forest in Changbai Mountain
|School||Beijing Forestry University|
|Keywords||Herbaceous layer Temperate forests Phenology Environmental factors Seasonal dynamics Seedling|
Broadleaved Korean pine forest herb layer diversity pattern in order to understand their phenology and environmental factors in positioning observations in 2009 and 2010 , 18 species of herbaceous understory phenological characteristics , and in 2006 , 2009 1.0 hm2 plot monthly survey and 2010 growing season ( May-September ) under different successional stages of forest stands ( secondary mixed conifer , secondary Yang birch and broad ) uniformly arranged 100 a 1 m2 herb plots , herb quadrats environmental factors in the 2006 survey data . The results show that : the investigation into a total of 114 kinds of herbs , belonging to 41 families and 92 genera . Ephemeral Plants 12 species, 38 kinds of plants early summer , late summer 52 kinds of plants , 12 kinds of ferns . The broad secondary forest herbs there are significant seasonal differences , different years , not the same species diversity of each month uneven . Early spring dominant of black mercury Lotus and northeast Corydalis early spring plants , other season Hill eggplant , white flowers Cardamine , nettle leaf leading grass early summer plants late summer plant - based . Early spring stage , broadleaved Korean pine species richness highest , while the other seasons of secondary the Birch forest species richness is higher . Continuous low temperature in the winter and spring of 2010 led to the observed 18 species of herbaceous plants leaf expansion in 2010 than 2009, an average of 12.9 days later , the beginning of flowering an average of 10.8 days later , flowering duration reduced by an average of 1.7 days . Phenology of herbaceous species diversity pattern time factor , environmental factors affecting the herbaceous species diversity pattern space factor . Closely related to environmental factors and tree layer, shrub layer , herbaceous layer and seedlings , on trees, shrubs , seedlings , herbs , indirect interactions between them directly , or through the influence of the conditions of their environment , and this effect both spatial scales , time scales , which constitutes a complex forest ecosystem plays an integral role in the herbaceous layer in which .