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生态学杂志 ›› 2010, Vol. 29 ›› Issue (06): 1087-1093.

• 研究报告 • 上一篇    下一篇

雌雄异株树种黄连木种群性比及空间分布

赵亚洲1,2;辛雅芬2;马钦彦1**;张春雨1   

  1. 1北京林业大学,北京 100083;2上海农林职业技术学院,上海 201600
  • 出版日期:2010-06-10 发布日期:2010-06-10

Population sex ratio and spatial distribution of dioecious tree species Pistacia chinensis.

ZHAO Ya-zhou1,2, XIN Ya-fen2, MA Qin-yan1, ZHANG Chun-yu1   

  1. 1Beijing Forestry University, Beijing 100083, China;2Shanghai Vocational Technical College of Agricultural and Forestry, Shanghai 201600, China
  • Online:2010-06-10 Published:2010-06-10

摘要: 研究了100 m × 140 m固定样地内黄连木种群的性比格局和空间分布。结果表明,调查样地中dbh≥4 cm的黄连木植株共有2116株,其中包括526株雌树,1200株雄树,性别未确定植株390株。黄连木性比(雄/雌=2.28)显著偏雄(P<0.001)。雌树和雄树平均胸径分别为7.34和7.81 cm,雄树胸径显著大于雌树胸径(P<0.05)。黄连木幼树、雌树和雄树均呈显著聚集性分布。黄连木幼树与雌树、幼树与雄树均在较小尺度上表现为相互吸引;雌树与雄树则在空间上相互排斥,即雌树与雄树存在空间分离现象;黄连木不同大小以及不同性别植株之间主要表现为相互排斥。

关键词: 兽药, 生态毒理, 环境影响

Abstract: An investigation was made on the population sex ratio and spatial distribution of dioecious tree species Pistacia chinensis within a 100 m × 140 m plot. In the plot, there were 2116 P. chinensis individuals with diameter at breast height (dbh) ≥4 cm, among which, 526 were females, 1200 were males, and 390 were undetermined. The sex ratio (males/females) was 2.28, indicating a significant male-biased sex ratio (P<0.001). The average dbh of the females and males was 7.34 cm and 7.81 cm, respectively, and the difference was significant (P<0.05). The saplings, females, and males all showed a significant clumped distribution. The saplings showed significant attraction to the females and males at small scales, while the females showed significant repulsion against the males at 0-50 m scales, i.e., the females and males exhibited spatial segregation. A significant repulsion also exhibited between different size and different sex individuals.

Key words: Veterinary medicines, Ecotoxicology, Environmental impact