Optimal management of invasive populations under uncertainties on connectivity between local populations

• Project/Area Number: 22770027
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Ecology/Environment
• Research Institution: National Institute for Environmental Studies
• Principal Investigator: YOKOMIZO Hiroyuki 独立行政法人国立環境研究所, 環境リスク研究センター, 研究員 (30550074)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: メタ個体群 / 情報ギャップ理論 / 外来種管理 / 最適化 / 不確実性 / 接続性 / 外来種 / 最適駆除努力 / Information-Gap / ダイナミックプログラミング / 空間構造 / 数理モデル

Research Abstract

Spread of invasive species to new areas and re-invasion of previously invaded patches contribute substantially to management and damage costs across a landscape. In order to slow spread or minimize management or damage costs at a landscape scale it is crucial to understand how populations of the invasive are connected via dispersal. I developed mathematical models to derive optimal allocation of management efforts in a meta-population with uncertain connectivity

Research Products

• [Journal Article] The behavior of multiple independent managers and ecological traits interact to determine prevalence of weeds (2013)
  • Author(s): Coutts S, Yokomizo H
  • Journal Title: Ecological Applications Volume: 23 Pages: 523-536
  • Peer Reviewed
• [Journal Article] Cost-benefit analysis for intentional plant introductions under uncertainty (2012)
  • Author(s): Yokomizo H
  • Journal Title: Biological Invasions Volume: 14 Pages: 839-849
  • Peer Reviewed
• [Journal Article] What are the key drivers of spread in invasive plants: dispersal, demography or landscape: and how can we use this knowledge to aid management? (2011)
  • Author(s): Coutts S, van Klinken RD, Yokomizo H
  • Journal Title: Biological Invasions Volume: 13 Pages: 1649-1661
  • Peer Reviewed
• [Presentation] Coupled socio-economic and ecological dynamics for management of agricultural landscapes in Sado Island (2013)
  • Author(s): Yokomizo H, Tsuge T, Nakamura S, Ujiie K, Usio N
  • Organizer: 第60回日本生態学会
  • Place of Presentation: 静岡: 静岡県コンベンションアーツセンター
  • Year and Date: 2013-03-05
• [Presentation] Making most robust ecological risk management of zinc in Japanese surface waters under severe uncertainty (2012)
  • Author(s): Yokomizo H, Naito W, Tanaka Y, Kamo M
  • Organizer: 第28回個体群生態学会
  • Place of Presentation: 習志野:東邦大学
  • Year and Date: 2012-10-21
• [Presentation] Making Most Robust Ecological Risk Management of zinc in Japanese surface waters under Sever Uncertainty (2012)
  • Author(s): Yokomizo H, Naito W, Tanaka Y, Kamo M
  • Organizer: SETAC Asia Pacific
  • Place of Presentation: Kumamoto Japan
  • Year and Date: 2012-09-26
• [Presentation] Setting most robust effluent level against severe uncertainty: application of information-gap decision theory to chemical management (2012)
  • Author(s): Yokomizo H, Naito W, Kamo M
  • Organizer: SETAC Europe 22nd Annual Meeting
  • Place of Presentation: Berlin Germany
  • Year and Date: 2012-05-24
• [Presentation] Making most robust decisions in ecological risk management of chemicals under severe uncertainty (2012)
  • Author(s): Yokomizo H
  • Organizer: 第59回日本生態学会
  • Place of Presentation: 大津: 龍谷大学
  • Year and Date: 2012-03-21
• [Presentation] 景観構造を考慮したアライグマによる農作物被害モデルの構築と被害予測 (2012)
  • Author(s): 栗山武夫、長田穣、横溝裕行、立田晴記、宮下直
  • Organizer: 第59回日本生態学会
  • Place of Presentation: 大津: 龍谷大学
  • Year and Date: 2012-03-19
• [Presentation] A novel stochastic simulation model for predicting the spread of large wildlife (2012)
  • Author(s): Osada Y, Asada M, Kuriyama T, Tatsuta H, Yokomizo H, Miyashita T
  • Organizer: 第59回日本生態学会
  • Place of Presentation: 大津: 龍谷大学
  • Year and Date: 2012-03-18
• [Presentation] 絶滅危惧植物の個体数と減少率の不確実性を考慮した保全努力の最適な空間配分 (2012)
  • Author(s): 横溝裕行
  • Organizer: 第59回日本生態学会
  • Place of Presentation: 大津: 龍谷大学
  • Year and Date: 2012-03-17
• [Presentation] Buckley Cost-benefit analysis for intentional plant introductions under uncertainty (2011)
  • Author(s): Yokomizo H. H. Possingham, P. Hulme, A. Grice, Y
  • Organizer: 25th International Congress for Conservation Biology
  • Place of Presentation: Auckland New Zealand
  • Year and Date: 2011-12-08
• [Presentation] Cost-benefit analysis for international plant introductions under uncertainty (2011)
  • Author(s): Yokomizo H
  • Organizer: International Congress for Conservation Biology
  • Place of Presentation: The SkyCity Hotel (Auckland)
  • Year and Date: 2011-12-08
• [Presentation] 在来植物の分布パターンと局所プロセスが外来植物(Cortaderia jubata)の分布拡大に与える影響 (2011)
  • Author(s): 横溝裕行
  • Organizer: 第21回数理生物学会
  • Place of Presentation: 明治大学(東京都)
  • Year and Date: 2011-09-13
• [Presentation] 在来植物の分布パターンと局所プロセスが外来植物(Cortaderia jubata)の分布拡大に与える影響 (2011)
  • Author(s): 横溝裕行
  • Organizer: 第21回数理生物学会
  • Place of Presentation: 東京:明治大学
  • Year and Date: 2011-09-03
• [Presentation] 外来植物の最適管理戦略:駆除にどれだけ投資すれば良いのか? (2011)
  • Author(s): 横溝裕行
  • Organizer: 第59回日本生態学会
  • Place of Presentation: 札幌:札幌コンベンションセンター
  • Year and Date: 2011-03-11
• [Presentation] 外来植物の最適管理戦略:駆除にどれだけ投資すれば良いのか? (2011)
  • Author(s): 横溝裕行
  • Organizer: 日本生態学会
  • Place of Presentation: 札幌コンベンションセンター(北海道)
  • Year and Date: 2011-03-11
• [Presentation] 在来植物の分布パターンと局所プロセスが外来植物の分布拡大に与える影響:パンパスグラス(Cortaderia jubata)を例としたシミュレーションモデルによる解析 (2011)
  • Author(s): 横溝裕行
  • Organizer: 第59回日本生態学会
  • Place of Presentation: 札幌:札幌コンベンションセンター
  • Year and Date: 2011-03-09
• [Presentation] 在来植物の分布パターンと局所プロセスが外来植物の分布拡大に与える影響:パンパスグラスCortaderia jubataを例としたシミュレーションモデルによる解析 (2011)
  • Author(s): 横溝裕行
  • Organizer: 日本生態学会
  • Place of Presentation: 札幌コンベンションセンター(北海道)
  • Year and Date: 2011-03-09
• [Presentation] 分布推定モデルは保護区選択の役に立つか?
  • Author(s): 石濱史子、竹中明夫、横溝裕行、角谷拓
  • Organizer: 第60回日本生態学会
  • Place of Presentation: 静岡: 静岡県コンベンションアーツセンター
• [Presentation] Making most robust ecological risk management of zinc in Japanese surface waters under severe uncertainty.
  • Author(s): Yokomizo H
  • Organizer: the Society of Population Ecology
  • Place of Presentation: 東邦大学（千葉県）
  • Invited
• [Presentation] データが十分にない状況で、どのような対策をとるべきか？情報ギャップ理論を用いた意思決定
  • Author(s): 横溝裕行
  • Organizer: 情報ギャップ理論セミナー
  • Place of Presentation: 西海区水産研究所（長崎県）
  • Invited
• [Remarks]
  • URL: http://www.nies.go.jp/risk/members/yokomizo/hyokomizo/hyokomizo.html