I am a theoretical ecologist largely interested in conservation biology and motivated by the need to understand the interplay between ecological and socioeconomic dynamics. My research also incorporates general topics in ecology, such as macroecology, population dynamics, and ecological sampling theory. My current projects include 1) determining an effective implementation of protected areas, 2) exploring human-nature dynamics in ecosystem management/conservation, and 3) developing an ecosystem model that describes macroecological patterns across spatial scales.

Professional Experience

2020 Sep - Present Assistant Professor, Department of International Studies, The University of Tokyo (Lab website)

2019 May - 2020 Sep Postdoctoral Researcher, Japan-Norway Researcher Mobility Programme,

Department of Biological Sciences, University of Bergen

2017 Apr - 2020 Aug JSPS Postdoctoral Fellow (PD),

Biodiversity and Biocomplexity Unit, Okinawa Institute of Science and Technology Graduate University

2015 Mar - 2017 Mar Postdoctoral Researcher Tropical Biosphere Research Center, University of the Ryukyus

Visiting academic in Possingham Lab at the University of Queensland

2012 Apr - 2015 Mar JSPS Predoctoral Fellow (DC1)


2012 Apr - 2015 Mar Ph.D., Theoretical Ecology, Kyushu University, Japan (Adviser: Yoh Iwasa)

2010 Apr - 2012 Mar M.S., Theoretical Ecology, Kyushu University, Japan (Adviser: Yoh Iwasa)

2006 Apr - 2010 Mar B.S., Rissho University, Japan (Adviser: Michinori Yamashita)

Publications My Google Scolar Profile is available here

Peer-reviewed Articles

  1. Takashina, N. & B. Kusumoto, A perspective on biodiversity data and applications for spatio-temporally robust spatial planning for area-based conservation, Discover Sustainability, 4:1 (2023) [PDF]

  2. Takashina, N., H. Cheung & M. Miyazawa, Spread the word: Sharing information on social media can stabilize conservation funding and improves ecological outcomes, Conservation Science and Practice, In press. [PDF]

  3. Tanaka, T., O. Tiku & N. Takashina, Empowering voluntary approaches for environmental sustainability and resilient communities: a case study from Okinawa, Japan, Discover Sustainability, 3:27 (2022) [PDF]

  4. Takashina, N. & T. Tanaka, Spillover-mediated harvesting competition: effects of fishing ground configuration on fisheries targeting transboundary species, Journal of Environmental Management, 317:115360 (2022) [PDF]

  5. Takashina, N., Linking multi-level population dynamics: state, role, and population, PeerJ, 10:e13315 (2022) [PDF]

  6. Takashina, N. & T. Tanaka, Immediate and cumulative stresses associated with the multiscale impacts of ecotourism on ecological status and resilience, Sustainability Science, 17:2133–2142 (2022)

  7. Kass, J.M., N. Takashina, N. Friedman, B. Kusumoto & M.E. Blair, Idea Paper: improving forecasts of community composition with lightweight biodiversity monitoring across ecological and anthropogenic disturbance gradients, Ecological Research, 37:466-470 (2022)

  8. Takashina, N., M.J. Plank, C.N. Jenkins & E.P. Economo, Species-range size distributions: integrating the effects of speciation, transformation, and extinction, Ecology and Evolution, 12:e8341 (2022) [PDF]

  9. Takashina, N., Long-term conservation effects of protected areas in stochastic population dynamics, Frontiers in Ecology and Evolution, 9:672608 (2021) [PDF]

  10. Takashina, N. & E.P. Economo, Developing generalized sampling schemes with known error properties: the case of a moving observer, Ecography, 44:293-306 (2021) [PDF]

  11. Takashina, N., On the spillover effect and optimal size of marine reserves for sustainable fishing yields, PeerJ, 8:e9798 (2020) [PDF]

  12. Takashina, N. & Ø. Fiksen, Optimal reproductive phenology under size-dependent cannibalism, Ecology and Evolution, 10:4241-4250 (2020) [PDF]

  13. Takashina, N., B. Kusumoto, Y. Kubota & E.P. Economo, A geometric approach to scaling individual distributions to macroecological patterns, Journal of Theoretical Biology, 461:170-188 (2019) (Abstract) [PDF]

  14. Takashina, N., B. Kusumoto, M. Beger, S. Rathnayake & H.P. Possingham, Spatially explicit approach to population abundance estimation in field surveys, Journal of Theoretical Biology, 453:88-95 (2018) [PDF]

  15. Braczkowski, A., M.H. Holden, C. O'Bryan, C.Y. Choi, X. Gan, N. Beesley, Y. Gao, J. Allan, P. Tyrrell, D. Stiles, P. Brehony, R. Meney, H. Brink, N. Takashina, M.C. Lin, H.Y. Lin, N. Rust, S.G. Salmo III, J.E.M. Watson, P. Kahumbu, M. Maron, H.P. Possingham & D. Biggs, Reach and messages of the world's largest ivory burn, Conservation Biology, (2018) (Abstract)

  16. Takashina, N., M. Beger, B. Kusumoto, S. Rathnayake & H.P. Possingham, A theory for ecological survey methods to map individual distributions, Theoretical Ecology, 11:213-223 (2018) [PDF]

  17. Takashina, N., J.H. Lee & H.P. Possingham, Effect of marine reserve establishment on non-cooperative fisheries management, Ecological Modelling, 360:336-342, (2017) [PDF]

  18. Takashina, N., Simple rules for establishment of effective marine protected areas in an age-structured metapopulation dynamics, Journal of Theoretical Biology, 391:88-94, (2016) (Abstract) [PDF]

  19. Takashina, N. & M.L. Baskett, Exploring the effect of the spatial scale of fishery management, Journal of Theoretical Biology, 390:14-22, (2016) (Abstract) [PDF]

  20. Takashina, N. & A. Mougi, Maximum sustainable yields from a spatially-explicit harvest model, Journal of Theoretical Biology, 383:87-92, (2015) (Abstract) [PDF]

  21. Takashina, N. & A. Mougi, Effects of marine protected areas on overfished fishing stocks with multiple stable states, Journal of Theoretical Biology, 341:64-70, (2014) (Abstract) [PDF]

  22. Takashina, N., A. Mougi & Y. Iwasa, Paradox of marine protected area: suppression of fishery may cause species loss, Population Ecology, 54:475-485 (2012) (Abstract) [PDF]

  23. Takashina, N., M. Yamashita, & H. Matsuda, Mathematical analysis for fisheries ecosystem management, Bulletin of Geo-Environmental Science, 12:115-119 (2010)

In Review

  1. Tanaka, T. and N. Takashina, on conservation governance.

  2. Takashina, N., on adaptive capacity in ecosystem management.

Other Articles

Takashina, N., A. Asao, N. Nakamura, Mathematical analysis of smoking population dynamics : an epidemiological model. RIMS Kôkyûroku, 1706:35-40, 2010

Referee Activities

African Journal of Marine Science, Applied Mathematical Modelling, BioSystems, Bulletin of Mathematical Biology, Conservation Biology, Conservation Letters, Ecological Informatics, Ecological Modelling, Ecology and Evolution, Ecology Letters, Ecosphere, Frontiers in Marine Science, Global Ecology and Biogeography, Japanese Journal of Ecology, Journal of Theoretical Biology, Land, Marine Policy, Mathematical Biosciences, Molecular Ecology Resources, Natural Resource Modeling, Norwegian Journal of Geography, PLOS ONE, Population Ecology, Theoretical Ecology, Theoretical Population Biology