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Takehisa YAMAKITA ^{Ph.D.(Science)}

• Marine Environmental Impact Assessment Research Group (M-EIA),Marine Biodiversity and Environmental Assessment Research Center (BioEnv) ,Research Institute for Global Change (RIGC),
  Japan Agency for Marine-Earth Science and Technology(JAMSTEC)
• Position: Scientist
• Address: 2-15, Natsushima-cho, Yokosuka-city, Kanagawa, 237-0061
• Email: yamakitat[at]jamstec.go.jp* please change [at] as atmark

Contents

• Selected Publications
  • Application of deep learning techniques for determining the aerial extent and classification of seagrass beds, Trang, Thailand [publisher],[draft]
  • Image dataset of ophiuroid and other deep sea benthic organisms in 2015 extracted from the survey off Sanriku, Japan [Formatted Text],[Link]
  • Impact of the 2011 tohoku earthquake on the use of tidal flats: a case study in inner Tokyo Bay [Researchgate]
  • Identification of important marine areas using EBSAs criteria in the East to Southeast Asia region [Link],[draft,suppli]
  • Identification of important marine areas around the Japanese Archipelago: using EBSA's criteria [Open Access]
  • Landscape mosaicness in the ocean: its significance for biodiversity patterns in benthic organisms and fish
    [ In Nakano et al. (eds.) The biodiversity observation network in the Asia-Pacific Region. Springer][Slide Share]
  • Asynchronous local dynamics contributes to stability of a seagrass bed in Tokyo Bay [Link] [draft]
  • Scale dependency in seagrass dynamics: how does the neighboring effect vary with grain of observation? [Link] [draft]
  • Importance of considering grain and extent for the analysis on spatial dynamics of seagrass[Open Access]
• Publication list・the List with reports and miscs
• My Research Gate(please send e-mail for request of copy)
• My Tweets
• Japanese Home "日本語のサイトはこちら"
• 

My research interests

I originally interested in "How basic science can be applied to a complex system. And at that time how science can facilitate its position as human culture". Especially, I fascinated in wetland ecosystem and its human relationships, because of its biodiversity, productivity (also as foods), traditional use and emergency by recent anthropogenic impacts. I also have a great interest in dealing with landscape issue include GIS, simulation and statistics (I love "R").

In my PhD. thesis I studied long-term seagrass dynamics using remote sensing and field experiment. At that moment, I tried to capture the scale dependency of the spatial-temporal patterns using spatial statistics. I also tried to simulate dynamics beyond one single spatial scale caused by a feedback mechanism between sand and seagrass patches as spatial self-organization. In my master course, I joined in a cooperative research program ("Geomar" in Kiel) which subjected to reveal diversity-stability relationships on marine fouling organisms.

As a post-doc, I worked about nationwide and Asian wide biodiversity estimation present and future. I also worked to evaluate terrestrial effects on the coastal area on a nationwide scale. Some of these results are cited in an IPBES regional assessment and reports in the project of the Ministry of the Environments.

When I was PosDoc I started to evaluate integrated human-nature interaction. This was what I expected to work on since I heavily worked as citizen activist during undergrad days such as a member of any conservation committees (e.g. "Sanbanze"), tentative worker as an interpreter in the national park "Oze", NGO's and conducted start-up of nature watching club (e.g UNExP).

Recently, I started the use of image recognition to extract organisms or vegetation in the broad scale of the area, including the application of deep-learning for remote sensing. In the future, I would like to integrate machine eye network and human-nature interaction and outreach of the researches.

Former affiliations and major activities

• 2016-2019:Environmental Impact Assessment Research Group,R&D Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology
• 2012-2020:PJ for Analyses of Changes in East Japan Marine Ecosystems (Research Unit for Habitat Mapping), Japan Agency for Marine-Earth Science and Technology
  　 (superviser: Hiroshi Kitasato and Katsunori Fujikura)
• 2017-:Part-time lecturer, Graduate School of Global Environmental Studies (GENV), Sophia University
  　 (class:"Basic Oceanography and Global Environmental Science (Omnibus)" (English))
• 2016-2019:Visiting Associate Professor, Assessment of Environmental Dynamics Division, Graduate School of Biosphere Science, Hiroshima University
  　 (class:"Theories and practices in marine ecosystem analysis" (English and Japanease))
• 2012-2013:Marine Biodiversity Res. Program, Inst. of Biogeosciences, Japan Agency for Marine-Earth Science and Technology
  　 (superviser: Hiroshi Kitasato and Katsunori Fujikura)
• 2011-2012: Laboratory of Biodiversity Science,Graduate School of Agriculture, The Univeristy of Tokyo
  (superviser: Tadashi Miyashita)
• 2011-2011:Coastal Productivity and Environment Division,National Research Institute of Fisheries and Environment of Inland Sea, Fisheries Research Agency
  (superviser: Masakazu Hori and Masami Hamaguchi)
• 2010-2011:Entomology lab., Department of Forest Entomology, Forestry and Forest Products Research Institute
  (superviser: Kimiko Okabe)
• 2004-2010: Community Ecology Labratory, Graduate School of Science, Chiba University
  (superviser: Masahiro Nakaoka and Takayoshi Tsuchiya)
  Keywords: Zostera Marina, Remote sensing, Tokyo bay, emergence, non linear process, spatial dynamics,
• 2006-2007: Global Approach by Moduler Experiment
  (superviser: Martin Whale and Mark Lenz)
• 2001-2004: Sanbanze Restolation planning board, a member of Land and seawall sub comettee
  (chairman: Masahiko Isobe(sub comettee) and Takashi Onishi (main comettee))

Other interests

• Global - local connection
• Hidden perception (Multiband image, Acoustic survey and stable isotopes)
• Spatial temporal measurement (D-GPS, Data logging, Kite photo,image recognition ,interval camera with web-server)
• Statistics and simulation (R, cygwin, win-Bugs, GRASS, Q-GIS, Python etc...)
• Scuba Diving, boat and field research in shallow area
• Human behavior and conservation planning
• Database and evolution

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