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Geographical variation in the population dynamics of Thecodiplosis japonensis: causes and effects on spatial synchrony

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Population Ecology

Abstract

Geographical variation in population dynamics of a species offers an opportunity to understand the factors determining observed patterns of spatial dynamics. We evaluated the spatial variation in the population dynamics of the pine needle gall midge (PNGM), Thecodiplosis japonensis, which is a severe insect pest in pine forests in Korea, and studied the influences of weather factors that could affect its population dynamics. Results revealed that PNGM population dynamics were classified into five clusters based on the analysis of autocorrelation function and self-organizing map, which is an artificial neural network. We also quantified spatial synchrony in the population dynamics of PNGM using the nonparametric covariance function. Variation in spatial synchrony was strongly related to differences in maximum temperature and precipitation in Random Forest analysis, suggesting that the synchrony in PNGM population dynamics is largely the result of the Moran effect. In addition, spatial differences in population dynamics could be influenced by transient process of synchronization following invasion. Finally, the present results indicate that differences in population dynamics can be induced by interactions among several factors such as maximum temperature, precipitation, and invasion history of species.

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Acknowledgments

We would like to thank Dr. Andrew Liebhold, the editor, for his reviews, comments, and edits to improve the manuscript. We also thank two anonymous reviewers for their valuable comments on an earlier version of this manuscript.

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Authors and Affiliations

  1. Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Dongdaemun, Seoul, 130-712, Korea

    Won Il Choi & Yeong-Jin Chung

  2. Division of Environmental Science and Ecological Engineering, Korea University, Seongbuk, Seoul, 136-713, Korea

    Mun Il Ryoo

  3. Department of Biology, Kyung Hee University, Dongdaemun, Seoul, 130-701, Korea

    Young-Seuk Park

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  1. Won Il Choi
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  2. Mun Il Ryoo
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Correspondence to Young-Seuk Park.

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Choi, W.I., Ryoo, M.I., Chung, YJ. et al. Geographical variation in the population dynamics of Thecodiplosis japonensis: causes and effects on spatial synchrony. Popul Ecol 53, 429–439 (2011). https://doi.org/10.1007/s10144-011-0263-8

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