觅食-感染风险权衡对集团内捕食系统的影响  

Impacts of Foraging-infection Risk Tradeoff on Intra-guild Predation System

作　　者：周帅 张荣 岳芹 Zhou Shuai;Zhang Rong;Yue Qin(Basic Teaching Department,Anhui Vocational College of Defense Technology,Lu’an 237005,China;School of Finance and Mathematics,West Anhui University,Lu’an 237012,China)

机构地区：[1]安徽国防科技职业学院公共课教学部,安徽六安237005 [2]皖西学院金融与数学学院,安徽六安237012

出　　处：《洛阳师范学院学报》2025年第2期1-4,共4页Journal of Luoyang Normal University

基　　金：安徽省高校自然科学研究重点项目(2023AH052740);安徽省优秀青年教师培育项目(YQZD2024088)。

摘　　要：从种群的活动强度出发,研究觅食-感染风险权衡对种群动态产生的影响,建立对称型集团内捕食系统模型,通过Matlab软件模拟种群动态变化研究中三种情形下觅食-感染风险权衡对系统的影响.结果表明,仅在食饵中加入觅食-感染风险权衡时,食饵和捕食者能够共存,甚至当强度足够大时,食饵能够占据优势,促使捕食者灭绝;仅在捕食者中加入觅食-感染风险权衡时,捕食者的优势更加明显,食饵无法存续,加速灭绝;在捕食者和食饵中均加入觅食-感染风险权衡时,食饵能够和捕食者共存,随着权衡强度的增加,捕食者和食饵种群的密度也增加,这说明觅食-感染风险权衡能够促进物种的存续,此外,密度调节能够在种群活动较少时促进食饵的存续.This research aims to explore the impacts of foraging-infection risk tradeoff on population dynamics based on the intensity of population activity,and analyze the impacts of foraging-infection risk tradeoff on the symmetrical intra-guild predation system in three cases by simulating population dynamics with Matlab software.The results show that when the foraging-infection risk tradeoff is introduced only in the prey,coexistence between prey and predators is possible.Even when the tradeoff intensity is sufficiently high,the prey can dominate and drive the predators to extinction.When the foraging-infection risk tradeoff is introduced only in the predators,the predators’advantage becomes more pronounced,leading to the inability of the prey to survive and accelerating their extinction.When the foraging-infection risk tradeoff is introduced in both predators and prey,coexistence between the two is possible.As the tradeoff intensity increases,the population densities of both predators and prey also increase.This indicates that the foraging-infection risk tradeoff can promote species persistence.Additionally,density regulation can enhance the persistence of prey when population activity is low.

关 键 词：集团内捕食系统 权衡 种群 共存 

分 类 号：Q141[生物学—生态学]