梅西奇稀树草原的空间格局：局部易化极限和人口统计随机性的作用
Spatial patterns in mesic savannas: the local facilitation limit and the role of demographic stochasticity
摘要：
我们提出了一个模型方程的树木密度的动态在梅西奇稀树草原。它考虑了树木之间的长期竞争和火灾作为当地促进机制的影响。尽管短程便利化采取的本地范围的限制，恢复在一般植被模型中获得的空间结构的标准全谱。因此，长期竞争是发展模式的关键因素。研究了树木与草的长期共存，以及火灾对树木生存和格局维持的影响。分析了人口统计噪声的影响。随机系统，在参数约束下的典型的梅西奇稀树草原，显示出不规则的模式特征的现实情况。在合理的噪音强度下，树木和草地仍然共存。
英文摘要：
We propose a model equation for the dynamics of tree density in mesic savannas. It considers long-range competition among trees and the effect of fire acting as a local facilitation mechanism. Despite short-range facilitation is taken to the local-range limit, the standard full spectrum of spatial structures obtained in general vegetation models is recovered. Long-range competition is thus the key ingredient for the development of patterns. The long time coexistence between trees and grass, and how fires affect the survival of trees as well as the maintenance of the patterns is studied. The influence of demographic noise is analyzed. The stochastic system, under the parameter constraints typical of mesic savannas, shows irregular patterns characteristics of realistic situations. The coexistence of trees and grass still remains at reasonable noise intensities.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
