生物多样性 ›› 2015, Vol. 23 ›› Issue (6): 767-774.DOI: 10.17520/biods.2015123

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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*()   

  1. 东北林业大学生态研究中心, 哈尔滨 150040
  • 收稿日期:2015-05-08 接受日期:2015-09-21 出版日期:2015-11-20 发布日期:2015-12-02
  • 通讯作者: 金光泽
  • 基金资助:
    国家自然科学基金(31270473)和长江学者和创新团队发展计划(IRT_15R09)

Effect of topography on shrub regeneration in a mixed broadleaved-Korean pine forest in the Xiaoxing’an Mountains

Xue Zhao, Lina Xu, Guangze Jin*()   

  1. Center for Ecological Research, Northeast Forestry University, Harbin 150040
  • Received:2015-05-08 Accepted:2015-09-21 Online:2015-11-20 Published:2015-12-02
  • Contact: Jin Guangze

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

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, 2008, and 2010, respectively. Topography significantly affected the distribution, mortality and recruitment of the 10 major shrub species (P < 0.05). Most shrub species preferred terrain characterized by slope degree > 6º. Aspect had less effects on the distribution of most strong shade-tolerant shrub species, but the density of the shade-intolerant species Corylus mandshurica on sunny and semi-sunny slopes was significantly higher than other aspects. For Acanthopanax senticosus, Philadelphus schrenkii, Deutzia gladata, Lonicera chrysantha, Euonymus pauciflorus, Corylus mandshurica and Lonicera praeflorens, the distribution, mortality and recruitment of shrubs with DBH < 1 cm were consistent with that of the shrubs with DBH ≥ 1 cm.

Key words: mixed broadleaved-Korean pine forest, topography, mortality, recruitment, niche separation