地形对典型阔叶红松林灌木更新的影响-生物多样性.PDF

生物多样性 2015, 23 (6): 767–774 doi: 10.17520/biods.2015123 Biodiversity Science http: // ·研究报告· 地形对典型阔叶红松林灌木更新的影响 赵 雪 徐丽娜 金光泽* (东北林业大学生态研究中心, 哈尔滨 150040) 摘要: 依托黑龙江凉水国家级自然保护区9 ha典型阔叶红松林动态监测样地的900个2 m × 2 m样方, 对灌木(H ≥ 30 cm, DBH 1 cm)进行了调查, 基于2006年、2008年和2010年3次调查数据, 分析了地形对灌木分布、死亡及新 增的影响。结果表明: 样地内共有灌木18种, 2006、2008和2010年的灌木总数分别为18,253株/ha 、27,383株/ha和 23,300株/ha 。地形对10种主要灌木的分布、死亡和新增均有显著的影响(P 0.05), 多数灌木种偏好坡中和山脊, 且 坡度6° 的地形; 坡向对大部分耐阴性较强的灌木的分布影响较小, 而喜光的毛榛子(Corylus mandshurica)在阳坡和 半阳坡的密度显著高于其他坡向。刺五加(Acanthopanax senticosus)、东北山梅花(Philadelphus schrenkii)、光萼溲疏 (Deutzia gladata) 、黄花忍冬(Lonicera chrysantha) 、瘤枝卫矛(Euonymus pauciflorus) 、毛榛子和早花忍冬(Lonicera praeflorens )7种灌木DBH 1 cm 的个体的分布、死亡和新增与其DBH ≥ 1 cm 的个体的分布表现基本一致。 关键词: 阔叶红松林, 地形, 死亡, 新增, 生态位分化 Effect of topography on shrub regeneration in a mixed broadleaved-Korean pine forest in the Xiaoxing’an Mountains Xue Zhao, Lina Xu, Guangze Jin* Center for Ecological Research, Northeast Forestry University, Harbin 150040 Abstract: To explore the response of shrubs to topographic heterogeneity, 900 perennial shrub (height (H) ≥ 30 cm, diameter at breast height (DBH) 1 cm) quadrats of 4 m2 (2 m × 2 m) were set up in a 9 ha plot in a typical mixed broadleaved-Korean pine forest in the Xiaoxing’an Mountains. All shrubs in the quadrats were tagged, measured for H and DBH, and identified to the species level. Based on census data collected in 2006, 2008, and 2010, we found that a total of 18 shrub species existed in these quadrats. Approximately 18,253, 27,383 and 23,300 individuals per hectare were found in 2006