[根据物种与面积的关系,研究岩石荒漠化地区的植被组成和多样性]
Han-Hua Feng1, Wen-Jie Yan2, Xu Wang3,4
1Guangdong Forestry Survey and Planning Institute, Guangzhou 510520, China.
概括
确定植被调查的最小平方面积是中国生态恢复的关键.
科学领域:
- 生态恢复 生态恢复
- 植物科学 植物科学
- 卡斯特地质形态的地质形态.
背景情况:
- 岩石荒漠化是中国的石地区面临的重大生态挑战.
- 准确的植被调查对于评估生态恢复工作至关重要.
研究的目的:
- 确定在岩石沙漠化地区进行植被调查所需的最小平方面积.
- 分析采样面积与物种组成和多样性的关系.
主要方法:
- 在典型的岩石荒漠化地区建立了宽叶和灌木林地块 (100米×100米).
- 利用嵌套采样和构造物种面积曲线.
- 比较功率函数,对数函数,以及用于数据拟合的后勤模型.
主要成果:
- 功率函数模型最好地描述了物种-面积关系 (R2 > 0.996).
- 含有50%-90%物种的最低地块面积在2105-7511平方米 (宽叶森林) 和2417-7886平方米 (灌木林) 之间.
- 灌木社区对占主导地位的物种丰度和多样性指数对地块大小变化的敏感度更大.
结论:
- 建议根据社区类型和研究目标设置采样地块大小,以提高代表性和准确性.
- 在异质的岩石荒漠化景观中的植被调查中强调了地块大小的重要性.
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