景观异质种群空间重构模型设计与仿真  

Design and Simulation of Spatial Reconstruction Model of Landscape Heterogeneous Population

作　　者：王玉虎 张楠 WANG Yu-hu;ZHANG Nan(School of Food and Environment,Jinzhong College of Information,Jinzhong Shanxi 030800,China;School of Mechanical and Electrical Engineering,Shanxi Datong University,Datong Shanxi 037003,China)

机构地区：[1]晋中信息学院食品与环境学院,山西晋中030800 [2]山西大同大学机电工程学院,山西大同037003

出　　处：《计算机仿真》2022年第7期310-313,341,共5页Computer Simulation

基　　金：山西省教育厅哲学社会科学研究项目(2018233041)。

摘　　要：为分析人类社会发展严重破坏自然环境所造成的景观破碎化程度,研究基于二阶优化的景观异质种群空间重构模型,实现科学治理和生态环境恢复。建立空间现实异质种群模型,利用含有破碎化景观的几何特征及异质种群全部信息,直接模拟真实景观,反映景观破碎化的趋势及程度。为避免模型的参数估计受生境斑块的独立性、局域种群的平衡条件等因素影响,建立参数的二阶泰勒级数展开,通过差分法近似求得一阶和二阶偏导数,完成模型参数优化。实验结果显示:二阶泰勒级数展开优化后的参数误差和响应计算值误差均低于优化前和一阶优化;上述模型可分析获取研究区近10年的景观破碎化程度呈现出逐渐稳定和降低态势,验证了当地居民环境保护意识的提高和生态治理的有效性。In order to analyze the degree of landscape fragmentation caused by the serious destruction of natural environment,a spatial reconstruction model of landscape metapopulation based on second-order optimization was studied to achieve the scientific governance and ecological environment restoration.Firstly,we built a spatially realistic metapopulation model.Then we used the geometric features containing the fragmented landscape and all the information of metapopulation to directly simulate the real landscape,thus to reflect the trend and degree of landscape fragmentation.In order to avoid the influence of factors such as the independence of habitat patches and the equilibrium condition of local population on the parameter estimation of model,we set up the second-order Taylor series expansion of parameter.Finally,we approximately calculated the first-order and second-order partial derivatives by the difference method,and thus to complete the parameter optimization.Experimental results show that the parameter error and response calculation error after the optimization of second-order Taylor series expansion are lower than those before optimization and of first-order optimization.In addition,the designed model can analyze and obtain the degree of landscape fragmentation of the study area in recent ten years,and this degree trends to be gradually stable and downward.Moreover,the improvement of residents’ environmental awareness and the effectiveness of ecological governance are also proved.

关 键 词：景观破碎化 异质种群 空间重构模型 泰勒级数展开 斑块数量 分离度指数 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]