Species abundance patterns and their origin in large-scale communities

2015 Fiscal Year Final Research Report

• Project/Area Number: 24570099
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Nagoya University (2013-2015); Osaka University (2012)
• Principal Investigator: Kei Tokita 名古屋大学, 情報科学研究科, 教授 (00263195)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 群集生態 / 相互作用 / 多様性 / 種の豊富さのパターン / 国際研究者交流（米国他） / 国際情報交換（米国他）

Outline of Final Research Achievements

An ecological model with multiple species and the dependency of the species abundance patterns on various community parameters were theoretically analyzed. It has been clarified that the ratio of the intraspecifc/interspecies interactions, the symmetry of the interaction matrix, sparceness of the interaction matrix and the density ratio of mutualistic/competitive interactions respectively, respectively, plays an important role for the species abundance patterns. In special, for a community with sparse interaction matrix, a solution of all species coexistence and a multiple peaked species abundance distribution has been newly discovered. In the research period 2013-2015, four peer-reviewed journal papers were published and eight (incl. two invited and two symposium chair) international conference talk were given. In addition, two peer-reviewed journal papers will be published during this fiscal year.

Free Research Field

Statistical physics and mathematical biology