Effects of ecosystem connectivity on biodiversity and restoration planning

2014 Fiscal Year Final Research Report

• Project/Area Number: 23248021
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Forest science
• Research Institution: Hokkaido University
• Principal Investigator: NAKAMURA Futoshi 北海道大学, (連合)農学研究科(研究院), 教授 (90172436)
• Co-Investigator(Kenkyū-buntansha): SUZUKI Toru 酪農学園大学, 農学生命科学部, 准教授 (20515861) ; YAMAURA Yuichi 独立行政法人森林総合研究所, 群落動態研究室, 研究員 (20580947) ; MORIMOTO Junko 北海道大学, 農学研究科, 准教授 (50338208) ; NAGAYAMA Shigeya 独立行政法人土木研究所, 自然共生研究センター, 研究員 (70540558) ; NEGISHI Junjiro 北海道大学, 地球環境科学研究科, 准教授 (90423029)
• Co-Investigator(Renkei-kenkyūsha): AKASAKA Takumi 帯広畜産大学, 畜産学部, 助教 (40748357)
• Research Collaborator: 石山 信雄 ; 末吉 正尚 ; 曽我 昌史 ; 松林 順 ; 藪原 佑樹 ; 山中 聡 ; 先崎 理之
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 連結性 / 森林生態系 / 河川生態系 / 氾濫原 / 鳥類 / 水生動物 / ヒグマ / 攪乱

Outline of Final Research Achievements

This project focused on connectivity between various ecosystems, and examined the effects of restoration project. Among fish and aquatic insects, only high mobility groups could enhance species richness as spatial and hydrologic connectivity increased. Pond connectivity significantly affected the spatial variation of both population abundance and genetic diversity of the ninespine stickleback. We revealed millennium-scale dietary shifts of brown bears on the Hokkaido islands, Japan, using carbon, nitrogen, and sulfur stable isotope analysis, and found that human activities have caused an alteration in the trophic structure of brown bears. The meander and floodplains restoration project successfully increased the frequency of flooding over the floodplains and raised the water table, resulting in an increase of abundance and species richness of fish and invertebrate species and wetland vegetation areas.

Free Research Field

生態系管理学