生产力是植物物种丰富性的一个糟糕的预测指标
Peter B Adler1, Eric W Seabloom, Elizabeth T Borer
1Department of Wildland Resources and the Ecology Center, Utah State University, 5230 Old Main, Logan, UT 84322, USA. peter.adler@usu.edu
Science (New York, N.Y.)
|September 24, 2011
概括
长期争论的净初级生产率与物种丰富度之间的形关系并没有得到普遍的支持. 新的研究表明没有明确的全球模式,敦促转向机械生态研究.
科学领域:
- 生态生态学 生态生态学
- 植物共同体生态学 植物共同体生态学
- 生物多样性研究 生物多样性研究
背景情况:
- 净初级生产率 (NPP) 与物种丰富度之间的关系是生态学中一个核心话题,影响了多样性调节理论.
- 主流假设表明一个形曲线:物种丰富度随着NPP增加到一个点,然后下降.
- 最近的元分析已经挑战了这种形模式的普遍性,但在方法上的不一致性方面面临批评.
研究的目的:
- 调查净初级生产率与细度物种丰富度之间的全球关系.
- 通过采用标准化抽样协议,解决对先前的元分析进行的方法论批评.
- 为了确定一个形模式是否存在于全球多样化的草本植物群落.
主要方法:
- 在48个草本植物占主导地位的植物群落中进行了标准化的现场采样.
- 从五大洲的地点收集数据,以确保广泛的地理代表性.
- 进行了统计分析,以评估生产力指标和物种丰富性在多个空间尺度 (现场内,区域内,全球) 之间的关系.
主要成果:
- 在净初级生产率和细度物种丰富度之间没有发现一致或明确的关系.
- 这种缺乏明确的模式在地方 (现场内),区域和全球范围内都被观察到.
- 这些发现挑战了普遍认为的普遍形生产率与财富关系的假设.
结论:
- 传统的生产力与财富关系的形模型可能不是一个一般的生态原则.
- 生态研究应优先考虑机械和多变量方法,以了解生产率和生物多样性之间的复杂联系.
- 未来的研究应该专注于新的方法,以解开当地物种多样性的驱动因素.
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