Evaluation of the fitness increased by seed dispersal

种子传播增加的适应性评价

• 批准号: 08454250
• 负责人: ASANO Toru
• 金额: $ 4.54万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08454250/
• 关键词: Seed dispersal; zoochory; wind dispersal; fitness; セーフサイト; 高等植物; 適応価; 逃避仮説; 指向性散布

The fitness increased by seed dispersal was evaluated for several tree species with two typical dispersal modes.1) Wind dispersalDispersal patterns of several wind dispersed species were analyzed in a mathematical model, and the adaptation to increase the dispersal distance was discussed. Also, the dispersal distance and the width of the safe site are correlated for these species.2) Animal dispersalA tree species, Kalopanax pictus, was analyzed for its dispersal mode and dormant characteristics of seed. The seed dispersed by birds germinated without time lag, though the seed not dispersed by birds tended to have dormancy. Another species, Corn us controversa, also has dormant seeds, whose germination rate is related to the distance dispersed.3) Theoretical analyses on seed dispersalThe evolutionarily stable resource allocation for wind dispersed seeds were theoretically analyzed.

通过两种典型的种子扩散方式，对几种树种的适合度进行了评价。1）风扩散通过数学模型分析了几种风扩散树种的扩散模式，并讨论了其对扩散距离增加的适应性。2）动物扩散分析了红刺楸种子的扩散方式和休眠特性。鸟类散布的种子萌发没有时滞，而非鸟类散布的种子则趋于休眠。另一种植物玉米（Corn us controversa）也有休眠种子，其萌发率与散布距离有关。3）种子散布的理论分析对风散布种子的进化稳定资源分配进行了理论分析。

项目成果

Shibata, M., Tanaka, H & Nakashizaka, T.: "Causes and conpequences ob mast seed production ob four co-occurring Carpinus species in Japan" Ecology. 79. 54-64 (1998)

柴田 M.、田中 H

H.Tanaka., M.Shibata and T.Nakashizuka: "A mechanistic approach for evaluating the role of wind dispersal in free population dynamics" J.Sustainable Forestry. 6. 155-174 (1998)

H.Tanaka.、M.Shibata 和 T.Nakashizuka：“评估风扩散在自由种群动态中的作用的机械方法”J.可持续林业。

Masaki,T., Tanaka,H., Shibata,M. & Nakashizuka,T.: "The seed bank dynamics of Cornus controversa and their role in regeneration." Seed Science Research. (in press). (1998)

Masaki，T.，田中，H.，柴田，M.

Nakashizuka (Asano),T.(分担): ""Biodiversity and the Dynamics of Ecosystems."" DIWPA,Kyoto, 383 (1996)

Nakashizuka (Asano), T.：“生物多样性和生态系统动态。”DIWPA，京都，383 (1996)

Sakai, S., Kikuzawa, K. & Umeki, K.: "Evolutioranily stable resource allocation for reproduction of wind dispersad seeds" Evolutionary Ecology. 12. 477-485 (1998)

酒井，S.，菊泽，K.