基于植被格局形成的森林生长指数模拟

P. Nyarko, C. Nyarko
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引用次数: 0

摘要

森林动力学主要涉及森林结构和组成随时间的变化,包括其对人为和自然破坏的响应行为,这是森林变化的主要证据之一。考虑光、水、温、养分肥力等相互作用指标,研究了植被格局形成的动态过程。采用Michaelis-Menten动力学和连续时间马尔可夫(CTM)方法来确定植物对所有输入的代谢响应。然后利用连续时间马尔可夫(CTM)技术,综合四种测量指标或资源(光、水、营养和温度),得到一个简单的植物生长组分。对公式模型进行了稳定性分析,以确定与各种稳定状态相关的可能相区,以便足够精确地表示模型的基本特征。得到的空间格局β值表明不同水分条件下不同土壤肥力水平之间存在关联或相互作用。例如,β值为0.05605代表干旱条件下的控制肥力,表明与其他肥力水平所表现的模式相比,这种植被模式具有更多更宽的裸地或几乎裸地斑块。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modelling Forest Growth Indices on Vegetation Pattern Formation
Forest dynamics is mostly concerned with the changes in forest structure and composition over time, including its behavior in response to anthropogenic and natural destructions which is one of the primary evidence of forest change. This study presents the dynamics of vegetation pattern formation taken into account all the interaction measure indices such as light, water, temperature and nutrients fertility. Michaelis-Menten Kinetics and a Continuous-Time Markov (CTM) method were employed to determine plant metabolism responses to all the inputs. The Continuous-Time Markov (CTM) technique was then used to obtain a simple plant growth component by synthesizing the four - measure indices or resources (light, water and nutrients and temperature). Stability analysis of the formulated model was carried out to determine the possible phase regions associated with the various stability states for a sufficiently precise representation of the essential features of the model. Results of the β values for the spatial patterns obtained indicate association or interaction among the various soil fertility levels under different water conditions. For instance, a β value of 0.05605 represents control fertility under arid conditions, indicates a vegetation pattern with numerous and wider patches of bare or almost bare land compared to patterns exhibited by the other fertility levels.
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