中文摘要：

依托黑龙江凉水国家级自然保护区9hm2典型阔叶红松林动态监测样地的900个2m×2m多年生幼苗（H≥30cm，DBH〈1cm）样方，基于2006、2008和2010年3次调查数据，分析了地形对幼苗建立的影响．结果表明：样地内共有乔木幼苗26种，2006、2008和2010年的乔木幼苗总数分别为4514、6464和5611株·hm-2．其中个体数前10位树种的幼苗数量占幼苗总数的90％以上．地形对8个主要乔木幼苗的分布有显著的影响，其中暴马丁香、冷杉、色木槭、春榆、花楷槭、紫椴和青楷槭幼苗与其成树分布基本一致，而红松幼苗的空间分布与成树分布有所不同．暴马丁香、冷杉、裂叶榆、青楷槭和紫椴幼苗的死亡与地形显著相关．暴马丁香、春榆、红松、冷杉、水曲柳、色木槭和紫椴新增幼苗与地形显著相关．

英文摘要：

To explore the responses of forest seedlings to topographic heterogeneity, nine hundreds of 4 m2 （2m×2 m） quadrats with perennial seedlings （H≥30 cm, DBH〈1cm） were installed in a 9 hm2 plot in a typical mixed broadleaved-Korean pine forest in Xiaoxing＇ an Mountains. Based on the investigation data in 2006, 2008, and 2010, the effects of topography on the seedling estab- lishment were studied. There were a total of 26 tree species in these quadrats. In 2006, 2008, and 2010, the total number of the tree seedlings was 4514, 6464, and 5611 individuals . hm-2, respec- tively, among which, the seedlings of the top 10 species occupied 〉90% of the total. Topography had significant effects on the seedling distribution of the 8 major tree species. For Syringa reticulate var. mandshurica, Abies nephrolepis, Acer mono, Ulmus japonica, A. ukurunduense, Tilia amuren- sis, and A. tegmentosum, the spatial distribution of the seedlings was consistent with that of grown trees ; but for Pinus koraiensis, the spatial distribution of seedlings was inconsistent with that of the grown trees. The mortality of S. reticulate var. mandshurica, A. nephrolepis, U. laciniata, A. teg- mentosum , and T. amurensis seedlings was significantly correlated with the topography. The recruit- ment of S. reticulate var. mandshurica, U. japonica, P. koraiensis, A. nephrolepis, Fraxinus mandshurica, A. mono, and T. amurensis seedlings was also significantly correlated with the topog- raphy.