Understanding the relationship between masting and stored carbohydrate resources in trees by a radioactive carbon analysis method

通过放射性碳分析方法了解树木中的肥大和储存的碳水化合物资源之间的关系

• 批准号: 23657022
• 负责人: ICHIE Tomoaki
• 金额: $ 2.5万
• 依托单位: Kochi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23657022/
• 关键词: 結実豊凶; 一斉開花; 種子生産; ブナ科; フタバガキ科; 熱帯雨林; 落葉広葉樹林; 豊凶現象; 繁殖システム; マスティング; 樹木; 優占種; 国際交流者交流; マレーシア; 炭水化物; 放射性炭素; メカニズム; 資源収支モデル

Many tree species undergo a large fluctuation from year to year in seed production, a phenomenon known as masting. The resource budget model, based on the assumption that abundant seeding in a masting year depends on abundant resources stored over several years, is a key hypothesis in explaining the mechanism of masting. But do masting species really need such a long-term storage in order to produce a large seed crop? To test this hypothesis, we studied relation between carbon accumulation periods for seed production, estimated by radiocarbon (^<14>C) analyses, and reproductive intervals in 10 canopy-tree species in a temperate deciduous forest and 17 dipterocarp species in a tropical rain forest. These species differ widely in their reproductive intervals. In all the species studied, the accumulation period toward seed maturation was less than 1.4 years. Moreover, regardless of species or reproductive intervals, there was no significant correlation between the carbon accumulation period and the fluctuation of annual seed production. Our results suggest that temperate and tropical canopy trees used the photosynthates produced in the current and/or the previous year for seed production regardless of reproductive intervals. It might therefore be necessary to reconsider the importance of stored carbohydrate resources for masting.

许多树种每年的种子产量都有很大的波动，这种现象被称为桅杆。资源收支模型是解释主伐机制的一个关键假设，它基于主伐年的大量播种取决于多年储存的大量资源这一假设。但是，桅杆物种真的需要这样一个长期的存储，以产生一个大的种子作物？为了验证这一假设，我们研究了碳积累期的种子生产，估计放射性碳（^<14>C）分析，和繁殖间隔之间的关系，在10个冠层树种在温带落叶林和17个龙脑香属物种在热带雨林。这些物种的生殖间隔差异很大。在所研究的所有物种中，种子成熟的积累期小于1.4年。此外，无论是物种还是繁殖间隔，碳积累期与年种子产量波动之间均无显著相关性。我们的研究结果表明，温带和热带树冠树木使用的光合产物在当前和/或前一年的种子生产，无论生殖间隔。因此，可能有必要重新考虑储存碳水化合物资源对桅杆的重要性。

项目成果

森林伐採からの回復過程における低木層クモ群集の変化

森林砍伐恢复过程中灌木层蜘蛛群落的变化

• 发表时间: 2012
• 作者: 原口岳;陀安一郎;原口岳・陀安一郎
• 通讯作者: 原口岳・陀安一郎

樹木の種子生産に貯蔵炭素は必要か?-放射性炭素分析法を用いた検証研究-

树木种子生产是否需要储存碳？ - 使用放射性碳分析方法进行验证研究 -

• 发表时间: 2011
• 作者: Liu;B.;A. Kanazawa;H. Matsuura;R. Takahashi;K. Harada;J. Abe;市栄智明
• 通讯作者: 市栄智明

Food web analyses using C and N stable isotopes : spiders shift their prey from aboveground to belowground origin through secondary succession

使用 C 和 N 稳定同位素进行食物网分析：蜘蛛通过二次演替将猎物从地上转移到地下

• 发表时间: 2012
• 作者: 原口岳;陀安一郎;原口岳・陀安一郎;原口岳・陀安一郎
• 通讯作者: 原口岳・陀安一郎

Are stored carbohydrates necessary for seed production in temperate deciduous trees?

• DOI: 10.1111/1365-2745.12038
• 发表时间: 2013-03-01
• 期刊: JOURNAL OF ECOLOGY
• 影响因子: 5.5
• 作者: Ichie, Tomoaki;Igarashi, Shuichi;Tayasu, Ichiro
• 通讯作者: Tayasu, Ichiro

Contributions of detrital subsidies to aboveground spiders during secondary succession, revealed by radiocarbon and stable isotope signatures

• DOI: 10.1007/s00442-012-2446-1
• 发表时间: 2013-04-01
• 期刊: OECOLOGIA
• 影响因子: 2.7
• 作者: Haraguchi, Takashi F.;Uchida, Masao;Tayasu, Ichiro
• 通讯作者: Tayasu, Ichiro