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Monitoring the performance and decline of heritage trees in urban Hong Kong

机译：监察香港市区文物古迹的表现和衰退

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摘要

Urban trees in Hong Kong exist in stressful and harsh habitat conditions due mainly to the exceptionally high-density development mode. This study focuses on the cream of the urban tree stock, the heritage trees, which were selected according to five sets of stringent criteria: species, dimension, structure, condition, location, and special considerations. The study area covers the main urban core of the city. The loss of trees in two periods, 1993-1998 and 1999-2003, was monitored, with the predisposing and direct causes of damages ascertained as far as possible. Of the 380 heritage specimens, 54 trees were lost in the survey period. The main predisposing causes were injuries sustained in roadwork and construction activities, both related to root damage and soil disturbance. The principal direct causes were recent gradual decline and abrupt demise due to typhoon breakage. Three pairs of contributing variables registered statistically significant associations (chi(2) test), namely predisposing cause versus direct cause, tree growth form versus direct cause, and survey period versus direct cause. Principal component analysis identified three factors that explained 70% of the variance, namely tree form, tree stature, and growth environment. The main reasons for the high mortality were explored. The possible applications of the findings to improve tree protection and management were discussed in relation to the overall planning for meritorious greenery and green space especially in compact cities.
机译：香港的城市树木存在于压力和恶劣的生境条件下，这主要是由于其异常高密度的开发模式。这项研究的重点是根据五种严格的标准（即物种，尺寸，结构，条件，位置和特殊考虑因素）选择的城市树木，传统树木的霜。研究区域涵盖了城市的主要城市核心。监测了1993-1998年和1999-2003年两个时期的树木损失，并尽可能确定了破坏的诱因和直接原因。在调查的380个遗产标本中，有54棵树木丢失。主要的诱因是在道路施工和建筑活动中受伤，这与根部损害和土壤扰动有关。主要的直接原因是最近由于台风破坏而逐渐下降和突然灭绝。三对贡献变量具有统计学显着性关联（chi（2）检验），即诱发原因与直接原因，树木生长形式与直接原因，调查时期与直接原因。主成分分析确定了解释70％差异的三个因素，即树形，树形和生长环境。探索了高死亡率的主要原因。结合有功绿化和绿地的总体规划，特别是在紧凑型城市中，讨论了研究结果在改善树木保护和管理方面的可能应用。

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  • 来源
    《Journal of Environmental Management》 |2005年第2期|p.161-172|共12页
  • 作者

    Jim CY;

  • 作者单位

    Department of Geography, The University of Hong Kong, Pokfulam Road, Hong Kong, China. hragjcy@hkucc.hku.hk;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境规划与环境管理;
  • 关键词

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