学科分类
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4 个结果
  • 简介:统计生态学与分析技术和方法的前进很快发展。这份报纸在后面的方面在中国关于统计生态学做了评论:数据收集,空间并且时间模式分析,种类丰富和种类区域关系,人口动态,种类亲密关系,社区类似和社区簇分析,和社区分类。

  • 标签: STATISTICS ECOLOGY MATHEMATICAL STATISTICS
  • 简介:Avegetationevolutionmodelinfluencedbyadegenerationofsoilecologicalfunctionswassetup.Threeidealcommunitiesofa)trees,b)shrubs,andc)herbagepopulationswerefirstsimulated.Thennumericalsimulationsoftheevolutionaryanddevelopmentalprocessesofanaturalforestcommunity,whichiscomposedofover100species,wereconducted.Resultsofthestudyshowedthata)inallcommunities,soildegenerationnotonlydrovesomeweakerspeciestoextinction,butalsoafewdominantones;b)thereweredifferentresponsescaleswithspeciesinanidealtreemetapopulationthatcouldpersistaslongasathousandyears,withshrubsinanidealshrubmetapopulationthatcouldpersevereforseveralhundredyears,andwithspeciesinanidealherbagemetapopulationthatcouldbecomeextinctwithin10years;andc)eachmetapopulationexperiencedthreeevolutionarystagesduringadaptationtotheenvironment:a)thestageofcompelledadaptationorresistance,b)theadjustedstage,andc)thestabilizedstage.

  • 标签: 植被进化 土壤生态学 数字仿真模型 荒漠化
  • 简介:Behaviorsofsikadeerinspringwerestudiedbyscansampling,adlibitumsampling,andall-occurrencerecordingmethodsduring1998.Theresultsshowedthatbehaviorsofsikadeerinspringcanbeclassifiedbysevencategories:grazing,ruminating,bedding,moving,standing,drinking,alert,agonisticandotherbehaviors.Variousbehavioralmodelsweremoreregular.Grazingbehaviorwasakindofmainlybehavioralmodel.

  • 标签: 半天赋 sika 鹿 行为 生态学
  • 简介:该文在认真分析昕水河流域自然、生态和社会经济状况的基础上,论述了生态经济型防护林体系建设的必要性和可行性;应用多目标规划和ES技术,对流域内三个不同类型的区域进行了优化规划模型的设计,并预测其发展趋势,寻求合理的土地利用结构和林种结构,以期在生态经济型防护林体系建设调控中提高各类用地的经济效益,促进整个昕水河流域生态经济系统向良性循环的机制发展.

  • 标签: 生态经济型防护林 多目标规划 林种结构 最优规划