Simultaneous examination of foliage partitioning theory and transmissibity differentiationtheory on tree species coexistence

2015 Fiscal Year Final Research Report

• Project/Area Number: 24247003
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Ecology/Environment
• Research Institution: Hokkaido University
• Principal Investigator: Kohyama Takashi 北海道大学, 地球環境科学研究科(研究院), 教授 (60178233)
• Co-Investigator(Kenkyū-buntansha): SUZUKI Maki 東京大学, 大学院新領域創成科学研究科, 准教授 (40396817) ; SUMIDA Akihiro 北海道大学, 低温科学研究所, 准教授 (50293551) ; TAKADA Takenori 北海道大学, 大学院地球環境科学研究科(研究院), 教授 (80206755) ; KUBO Takuya 北海道大学, 大学院地球環境科学研究科(研究院), 助教 (80344498)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 共存 / 理論 / 平衡 / 光資源 / 競争

Outline of Final Research Achievements

Coexistence of tree species in natural forest ecosystems has been examined in relation to differential response of species with varied degree of shade tolerance along the process of recovery from disturbance, horizontal resource heterogeneity and stochastic species turnover.
We developed an analytically tractable model of multi-layered competition equations, and examined the conditions of stable, as well as unstable, conditions for equilibrium coexistence among species without shade-tolerance differentiation.
Using field-census data of forest tree inventories from tropical to cool-temperate subalpine forests, we examined inter-specific trade-offs in demographic properties and architectural traits and tested how and to which extent the detected inter-specific trade-offs contributed to each hypothesis. We also developed the procedure of distinguishing inter-specific trade-offs and intra-specific plastic differentiation in demographic and architectural trait analysis.

Free Research Field

植物生態学・群集生態学