种群密度模型

种群密度模型

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contributed at 2018-12-04

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Affiliation:  
岳天祥编著
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yue@lreis.ac.cn
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Geography SubjectPhysical GeographyEcosystem

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种群密度模型

    1)产卵密度与成虫期末密度的关系经验模型:

2)种群密度模型:

式中,Ne为每公顷产卵数,G为每公顷鹰嘴豆在成虫期末时gypsy moths的生物量密度,设m=106Wd-12500Ws/2F为植物生物量密度;P为捕食者生物量密度;Ns为种群密度稀疏时每对成虫的产卵数(eggs/egg mass in a sparse population);Nd为种群密度稠密时对每对成虫的产卵数(eggs/egg mass in a sparse population);Ws为种群密度稀疏时每对成虫的质量(mass(g) of a pair of large larve in a sparse population);Wd为种群密度稠密时每对成虫的质量(mass(g) of a pair of large larve in a sparse population);cpmax为栖息地最大承载能力(maximum carrying capacity of stand (ghectare-1));f0为植物生物量的初始值(initialvalue for foliage biomass (ghectare-1);fii小种群每年增长因子(factor by which amall populations increase per year);n为由于严重的密度过载导致的成虫衰减率(decay rate oflarvae due to severe overpopulation);nd为导致Pd的落叶年数(number of years of defoliation resulting in pd

);nr为栖息地恢复所需年数(number of years required for recovery of stand);sd为成虫在分散中的生存率(percentof larvae surviving dispersal);sw为成虫越冬的生存率(percent of larvae surviving the winter);wL为新孵出幼虫的质量(mass(g)of a newly hatched larva);c1=n/[Tlifelg(e)]c2为每克捕食者一定天数捕食的成虫克数;c3=α-1[c1+ln(Ws/2wL)/Tlife]c4=PTlife-1ln(swsdNs/2fi)c5为成虫采食率(searchrate of larvae for foliage);c6为植物相对生长率(relative growth rate of foilage);α为成虫的消化效率(assimilation efficiency of larvae)。

 

 

参考文献

    Wilder JW:初始条件的敏感依赖性和瞬时混沌对gypsy moths暴发预测的影响。EcologicalModelling2001136

How to cite

《资源环境数学模型手册》 (2018). 种群密度模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/be18628d-92a8-404d-93c4-db73dc1200b0
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Contributor

contributed at 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
Is authorship not correct? Feed back

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