...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Resonance-induced multimodal body-size distributions in ecosystems
【24h】

Resonance-induced multimodal body-size distributions in ecosystems

机译：共振引起的生态系统多式联体的体型分布

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The size of an organism reflects its metabolic rate, growth rate, mortality, and other important characteristics; therefore, the distribution of body size is a major determinant of ecosystem structure and function. Body-size distributions often are multimodal, with several peaks of abundant sizes, and previous studies suggest that this is the outcome of niche separation: species from distinct peaks avoid competition by consuming different resources, which results in selection of different sizes in each niche. However, this cannot explain many ecosystems with several peaks competing over the same niche. Here, we suggest an alternative, generic mechanism underlying multimodal size distributions, by showing that the size-dependent tradeoff between reproduction and resource utilization entails an inherent resonance that may induce multiple peaks, all competing over the same niche. Our theory is well fitted to empirical data in various ecosystems, in which both model and measurements show a multimodal, periodically peaked distribution at larger sizes, followed by a "smooth fail at smaller sizes. Moreover, we show a universal pattern of size distributions, manifested in the collapse of data from ecosystems of different scales: phytoplankton in a lake, metazoans in a stream, and arthropods in forests. The demonstrated resonance mechanism is generic, suggesting that multi-modal distributions of numerous ecological characters emerge from the interplay between local competition and global migration.
机译：生物体的大小反映了其代谢率，生长率，死亡率和其他重要特征。因此，体型的分布是生态系统结构和功能的主要决定因素。体型分布通常是多峰的，有几个峰的大小都很大，以前的研究表明这是生态位分离的结果：来自不同峰的物种通过消耗不同的资源避免竞争，从而导致每个生态位选择不同的大小。但是，这不能解释许多生态系统中有几个峰在同一生态位上竞争。在这里，我们通过显示复制和资源利用之间的尺寸相关权衡需要固有的共振，这可能引发多个峰，所有峰都竞争同一个利基，从而提出了一种多峰尺寸分布基础的另一种通用机制。我们的理论非常适合各种生态系统中的经验数据，其中模型和度量均显示出多峰的，周期性的峰值分布（在较大的尺寸下），然后出现“在较小尺寸的情况下平滑失效。此外，我们显示了尺寸分布的通用模式，表现为不同规模的生态系统的数据崩溃：湖泊中的浮游植物，溪流中的后生动物和森林中的节肢动物，已证实的共振机制是通用的，表明许多生态特征的多峰分布是由当地之间的相互作用形成的竞争和全球移民。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号