Kazutaka KAWATSU Web Page

Welcome! This site introduces my research activities seeking the origin of ecological systems, the reason for their persistence and the way to engineer them for the future!

https://www.somany-frogs.com
  1. Kawatsu, K.* (2024). Local-manifold-distance-based regression: An estimation method for quantifying dynamic biological interactions with empirical time series. Royal Society Open Science, 11, 231795. DOI: 10.1098/rsos.231795.
  2. Kawatsu, K.* (2024). Unraveling emergent network indeterminacy in complex ecosystems: a random matrix approach. Proceedings of the National Academy of Sciences, 121, e2322939121. DOI: 10.1073/pnas.2322939121.
  3. Mori, N., Kawatsu, K., Noriyuki, S., Kosilov, A., Martemyanov, V., Yamashita, M. & Inoue, M.N.* (2024). Monitoring and prediction of spongy moth (Lymantria dispar) outbreaks in Mountain’s landscape using a combination of Sentinel-2 images and nonlinear time series model. Forest Ecology and Management, 563, 121975. DOI: 10.1016/j.foreco.2024.121975.
  4. Kawase, T., Kyogoku, D., Kawatsu, K., Katayama, N., Miki, T.* & Kondoh, M. (2023). Time series analysis showing how different environmental conditions affect the interspecific interactions of Callosobruchus maculatus and Callosobruchus chinensis. Population Ecology, 66, 6-21. DOI: 10.1002/1438-390X.12160.
  5. Otomo, Y.*, Masuda, R., Osada, Y., Kawatsu, K. & Kondoh, M. (2023). Dynamics-based characterization and classification of biodiversity indicators. Ecology and Evolution, 13, e10271. DOI: 10.1002/ece3.10271.
  6. Dailin, Y., Kato, H., Kawatsu, K., Osada, Y., Azuma, T., Nagata, Y. & Kondoh, M.* (2022). Reconstruction of a soil microbial network induced by stress temperature. Microbiology Spectrum, 10, e02748-22. DOI: 10.1128/spectrum.02748-22.
  7. Noriyuki, S.*, Kawatsu, K. & Kaneko, S. (2022). Nonlinear time series analysis of the predator-prey interaction between the citrus whitefly and the whitefly-specialist ladybird. Journal of Applied Entomology, 146, 903–910. DOI: 10.1111/jen.13021.
  8. Mukaimine, W.*, Kawatsu, K. & Toquenaga, Y. (2021). Digging out intersexual and meteorological effects on cicada emergence using 10-year citizen monitoring. Ecological Entomology, 47, 253–261. DOI: 10.1111/een.13109.
  9. Kawatsu, K., Ushio, M., Van Veen, F.J.K. & Kondoh, M.* (2021). Are networks of trophic interactions sufficient for understanding the dynamics of multi-trophic communities? Analysis of a tri-trophic insect food-web time-series. Ecology Letters, 24, 543–552. DOI: 10.1111/ele.13672.
  10. Kawatsu, K.*, (2020). Ecology and evolution of density-dependence. In: Diversity of Functional Traits and Interactions: Perspectives on Community Dynamics. (ed. Mougi, A.). Springer, Singapore, pp. 161–174.
  11. Ushio, M.* & Kawatsu, K., (2020). Forecasting ecological time series using empirical dynamic modelling: a tutorial for simplex projection and S-map. In: Diversity of Functional Traits and Interactions: Perspectives on Community Dynamics. (ed. Mougi, A.). Springer, Singapore, pp. 193–213.
  12. Kondoh, M.*, Kawatsu, K., Osada, Y. & Ushio, M. (2020). A data-driven approach to complex ecological systems. In: Theoretical Ecology, Concepts and Applications. (eds. McCann, K.S. & Gellner, G.) Oxford University Press, Oxford, UK, pp. 116-133.
  13. Kawatsu, K.*, Yamanaka, T. Patoèka, J. & Liebhold, A.M. (2020). Nonlinear time series analysis unravels the underlying mechanisms of interspecific synchrony among foliage-feeding forest Lepidoptera species. Population Ecology, 62, 5–14. DOI: 10.1002/1438-390X.12025.
  14. Satake, A.*, Kawatsu, K., Teshima, K., Kabeya, D. & Han. Q. (2019). Field transcriptome revealed a novel relationship between nitrate transport and flowering in Japanese beech. Scientific Reports, 9, No. 4325. DOI: 10.1038/s41598-019-39608-1.
  15. Satake, A.*, Kawatsu, K., Chiba, Y., Kitamura, K. & Han, Q. (2019). Synchronized expression of FLOWERING LOCUS T between branches underlies mass flowering in Fagus crenata. Population Ecology, 61, 5–13. DOI: 10.1002/1438-390X.1010.
  16. Kawatsu, K.* & Kondoh, M. (2018). Density-dependent interspecific interactions and the complexity-stability relationship. Proceedings of the Royal Society B, 285, 20180698. DOI: 10.1098/rspb.2018.0698.
  17. Kawatsu, K.* (2018). Ecological effects of sex differ with trophic positions in a simple food web. Ecology and Evolution, 8, 1239–1246. DOI: 10.1002/ece3.3740.
  18. Kawatsu, K.* & Kishi, S. (2018). Identifying critical interactions in complex dynamics between bean beetles. Oikos, 127, 553–560. DOI: 10.1111/oik.04103 (both authors are equally contributed).
  19. Kawatsu, K.* (2015). Red Queen dancing in the lek: effects of mating skew on host-parasite interactions. Ecology and Evolution, 4, 5432–5440. DOI: 10.1002/ece3.1809.
  20. Kawatsu, K.* (2015). Breaking the parthenogenesis fertilization barrier: direct and indirect selection pressures promote male fertilization of parthenogenetic females. Evolutionary Ecology, 23, 49–62. DOI: 10.1007/s10682-014-9749-0.
  21. Kobayashi, K.*, Hasegawa, E., Yamamoto, Y., Kawatsu, K., Vargo, E.L., Yoshimura, J. & Matsuura, K. (2013). Sex ratio biases in termites provide evidence for kin selection. Nature Communications, 4, No. 3048. DOI: 10.1038/ncomms3048.
  22. Kawatsu, K.* & Matsuura, K. (2013). Preadaptation for parthenogenetic reproduction in subterranean termites Reticulitermes spp. (Isoptera: Rhinotermitidae). Journal of Ethology, 31, 123–128. DOI: 10.1007/s10164-012-0356-7.
  23. Kawatsu, K.* (2013). Sexual conflict over the maintenance of sex: effects of sexually antagonistic coevolution for reproductive isolation of parthenogenesis. PLOS ONE, 8, e58141. DOI: 10.1371/journal.pone/0058141.
  24. Kawatsu, K.* (2013). Sexually antagonistic coevolution for sexual harassment can act as a barrier to further invasions of parthenogenesis. The American Naturalist, 181, 223–234. DOI: 10.1086/668832.
  25. Kawatsu, K.* (2013). Effects of nutritional conditions on larval food requisition behavior in subterranean termites Reticulitermes speratus (Isoptera: Rhinotermitidae). Journal of Ethology, 31, 17–22. DOI: 10.1007/s10164-012-0343-z.
  26. Noriyuki, S.*, Kawatsu, K. & Osawa, N. (2012). Maternal trophic egg provisioning in non-eusocial animals. Population Ecology, 54, 455–465. DOI: 10.1007/s10144-012-03176.
  27. Matsuura, K.*, Vargo, E.L., Kawatsu, K., Labadie, P., Nakano, H., Yashiro, T. & Tsuji, K. (2009). Queen succession through asexual reproduction in termites. Science, 323, 1687. DOI: 10.1126/science.1169702.

* Corresponding author

  1. Kawatsu, K. et al. (in prep).
  2. Kawatsu, K. (in prep).
  3. Kawatsu, K. et al. (in prep).
  4. Kawatsu, K. (in prep).
  5. Kawatsu, K. et al. (submitted).

Animal Behaviour; Applied Entomology and Zoology; Communications Biology; Ecological Informatics; Ecological Research; Ecology and Evolution; Ecology Letters (*3); Entomological Science; Evolution (*2); Evolutionary Ecology; Frontiers in Microbiology; Insect Sociaux; Integrative and Comparative Biology; Journal of Ethology (*2); Journal of Evolutionary Biology (*2); Journal of General and Applied Microbiology; Journal of Theoretical Biology;  Methods in Ecology & Evolution; Nature Ecology & Evolution (*2); Oikos (*2); PeerJ; PLOS Biology; Population Ecology; Proceedings of the National Academy of Sciences; Proceedings of the Royal Society B.