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Demographic histories of three predatory lady beetles reveal complex patterns of diversity and population size change in the United States

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Insect Science 2018年第6期25卷 1065-1079页

作者： Arun Sethuraman Fredric J.Janzen Michael A.Rubio Yumary Vasquez John J.Obrycki Department of Biological Sciences Cafifomia State University San MarcosSan MarcosCaliforniaUSA Department of Ecology Evolution and Organismal BiologyIowa State UniversityAmesIowaUSA Department of Entomology University of KentuckyLexingtonKentuckyUSA

Predatory lady beetles (Coccinellidae)contribute to biological control of agri- cultural pests,however,multiple species frequently compete for similar resources in the same *** studies have examined ecological interactions among the native North American convergent lady beetle (Hippodamia convergens)and two intro- duced species,the seven-spotted lady beetle (Coccinella septempunctata)and the Asian lady beetle (Harmonia axyridis),in agricultural fields and described multiyear population ***,the evolutionary dynamics of these interacting species of predatory beetles are *** utilize publicly available multilocus genotype data from geographically disjunct populations of these three species to estimate demography across North American *** analyses reveal (1)a recent (4-5years)decline (>12 fold)in microsatellite effective population size ***,while expanding (mutation scaled growth rate in 1/u generations =2910,SD =362)over evolutionary time scales,(2)a massive (>150 fold),and very recent,effective population size decline in Ha. axyridis,and (3)population size growth (mutation scaled growth rate =997,SD =60)over recent and evolutionary time scales in *** these estimates are based on genetic data with different mutation rates and patterns of inheritance (mitochondrial versus nuclear),these dynamic and differing population size histories are striking. Further studies of the interactions of these predatory lady beetles in the field are thus warranted to explore the consequences of population size change and biological control activities for evolutionary trajectories in North America.

关键词： biological control bottleneck demography effective population size inva- siveness predatory lady beetles

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