Disease spread in age structured populations with maternal age effects.

Disease spread in age structured populations with maternal age effects.
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DOI:
10.1111/ele.12745
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发表时间:
2017-04
期刊:
影响因子:
8.8
通讯作者:
Little TJ
Little TJ
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Clark J;Garbutt JS;McNally L;Little TJ

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基本的生态过程,例如外在死亡率,决定了人口年龄结构。当不同年龄的个体易感性不同或当母亲年龄决定后代易感性时,这会影响疾病传播。我们发现,年轻母亲所生的大型水蚤后代比年长母亲所生的后代更容易受到影响,并将这一点与之前的观察结果一起考虑,即在该系统中,易感性随着年龄的增长而下降。我们使用易感感染区室模型来研究年龄特异性易感性和母亲年龄对后代易感性的影响如何与影响疾病传播的人口因素相互作用。我们的结果表明,外在死亡率的增加会导致传播潜力的增加。因此,我们确定了年龄效应和母亲效应产生有利于疾病传播的条件的现实背景。
Fundamental ecological processes, such as extrinsic mortality, determine population age structure. This influences disease spread when individuals of different ages differ in susceptibility or when maternal age determines offspring susceptibility. We show that Daphnia magna offspring born to young mothers are more susceptible than those born to older mothers, and consider this alongside previous observations that susceptibility declines with age in this system. We used a susceptible‐infected compartmental model to investigate how age‐specific susceptibility and maternal age effects on offspring susceptibility interact with demographic factors affecting disease spread. Our results show a scenario where an increase in extrinsic mortality drives an increase in transmission potential. Thus, we identify a realistic context in which age effects and maternal effects produce conditions favouring disease transmission.
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