• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecosystems >Dynamics of Reciprocal Pulsed Subsidies in Local and Meta-Ecosystems
【24h】

Dynamics of Reciprocal Pulsed Subsidies in Local and Meta-Ecosystems

机译：本地和元生态系统中互惠脉冲补贴的动态

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

Temporally variable and reciprocal subsidies between ecosystems are ubiquitous. These spatial flows can generate a suite of direct and indirect effects in local and meta-ecosystems. The focus of most subsidy research, however, has been on the response of consumers in recipient ecosystems to constant subsidies over very short or very long time scales. We derive a meta-ecosystem model to explicitly consider the dynamic feedbacks between local ecosystems coupled through reciprocal pulsed subsidies. We predict oscillating reinforcing and dampening effects of reciprocal pulsed herbivore flows. Maximum reinforcing effects between reciprocal pulsed herbivore flows occur when these flows are in phase with the dynamics of neighboring predators. This prediction is robust to a range of pulse quantities and frequencies. Reciprocal pulsed herbivore subsidies lead to spatial and temporal variability in the strength of trophic cascades in local and meta-ecosystems but these cascading effects are the strongest when reciprocal pulsed subsidies are temporally concentrated. When predators demonstrate a behavioral response to prey abundance, reciprocal pulsed subsidies dampen the strength of local trophic cascades but lead to strong trophic cascades across local ecosystems. The timing of reciprocal pulsed subsidies is a critical component that determines the cascading effects of spatial flows. We show that spatial and temporal variabilities in resources and consumers can have a significant influence on the strength of cascading trophic interactions; therefore, our ability to detect and understand trophic cascades may depend on the scale of inquiry of ecological studies.
机译：生态系统之间的临时性和互惠性补贴无处不在。这些空间流可以在局部和元生态系统中产生一系列直接和间接的影响。但是，大多数补贴研究的重点一直是受赠者生态系统中的消费者在很短或很长的时间范围内对持续补贴的反应。我们推导出一个元生态系统模型，以明确考虑通过互惠的脉冲补贴耦合的本地生态系统之间的动态反馈。我们预测往复脉冲食草动物流的振荡增强和阻尼作用。当这些脉冲食草动物流与相邻掠食者的动力学同相时，它们之间会产生最大的增强效果。该预测对于一定范围的脉冲数量和频率具有鲁棒性。反向脉冲食草动物补贴导致局部和元生态系统中营养级联强度的时空变化，但是当反向脉冲补贴在时间上集中时，这些级联效应最强。当捕食者表现出对猎物丰富度的行为反应时，相互的脉冲补贴会削弱本地营养级联的强度，但会导致整个本地生态系统出现强营养级联。相互脉冲补贴的时机是决定空间流的级联效应的关键组成部分。我们表明，资源和消费者的时空变化可以对级联营养相互作用的强度产生重大影响。因此，我们检测和理解营养级联的能力可能取决于生态学研究的规模。

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