Ecological study on the conservation of biodiversity and the spreading of alien plant species in the lucidophyllus forest under the long term sika deer pressure

2014 Fiscal Year Final Research Report

• Project/Area Number: 23510300
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Resource conservation science
• Research Institution: Osaka Sangyo University
• Principal Investigator: MAESAKO Yuri 大阪産業大学, 人間環境学部, 教授 (90208546)
• Co-Investigator(Kenkyū-buntansha): KANZAKI Mamoru 京都大学, (連合)農学研究科, 教授 (70183291) ; SUZUKI Tohru 筑波大学, 生命環境科学研究科, 助教 (90418781)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: 植生動態 / 照葉樹林 / ニホンジカ / シカ柵実験区 / 外来種拡散 / 可塑性 / 光環境

Outline of Final Research Achievements

The invasive alien woody species Pococarpus nagi(an domestic alien species, an evergreen conifer) and sapium sebiferum (a deciduous broad-leaved species)has expanded its range and become dominant in the Kasugayama Forest Reserve: World Cultural Heritage, situated in the western Japan. We surveyed the relationship between sika deer pressure and biodiversity in the lucidophyllus forest, by the method of setting deer enclosures and analysis of forest canopy structure (the openness) in the period of 2011-2015. Biodiversity in the forest including Podocarpus nagi did not increase, however, in sika deer enclosure sites of gap canopy of openness 10.0% the biodiversity showed clear changes on the understory forest vegetation. We found the biodiversity of native hervaceous and woody plants would increase under the more 5 % openness, not closed canopy (1-3% openness).

Free Research Field

生態学