关于"植物多样性随着全球范围内负密度依赖的强度而增加"的评论
Ryan A Chisholm1,2, Tak Fung3
1Department of Biological Sciences, National University of Singapore, 117558 Singapore. ryan.chis@gmail.com.
Science (New York, N.Y.)
|May 26, 2018
概括
一项关于树木群落的研究没有发现支持度多样性梯度的证据. 之前的发现被证明是数据分析的工件,经过校正的方法显示没有度趋势.
科学领域:
- 生态学
- 生物多样性科学
- 森林生态
背景情况:
- 度多样性梯度,是一种随着度的下降而增加物种丰富性的模式,是生态学的基本概念.
- 之前的研究表明,树木群体的共同负密度依赖性解释了这种梯度,在较低度地区的影响更强烈.
研究的目的:
- 重新评估拉曼纳等人的研究结果. 关于同类型的负密度依赖及其与度多样性梯度的关系.
- 要确定所观察到的密度依赖的度趋势是真正的生态现象还是分析方法的产物.
主要方法:
- 通过LaManna等人提供的数据进行统计再分析.
- 选择性数据转换和模型拟合程序的纠正,特别是针对强制零截取.
主要成果:
- 拉曼纳等人最初的发现. 是由于特定的数据操纵和模型约束而产生的文物.
- 经过校正的统计分析显示,跨度的同种类负密度依赖性没有显著的趋势.
结论:
- 基于树密度依赖的度多样性梯度的拟议机制解释没有得到纠正的分析的支持.
- 这项研究强调了严格的数据分析和模型验证在生态研究中的重要性,以避免虚假的结论.
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