Effects of hoarding activity of Apodemus mice on the regeneration and spreading of acorn-producing tree species.

黑线姬鼠的囤积活动对橡实树种再生和扩散的影响。

• 批准号: 18580149
• 负责人: SONE Kouichi
• 金额: $ 2.09万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18580149/
• 关键词: 森林性野ネズミ; 貯食活動; マテバシイ; 更新; 分布拡大; 生命表解析; ラジオテレメトリー; ドングリ; 生命表; 行動圏; 広葉樹; マイクロサテライトマーカー; 常緑広葉樹

To clarify the effects of the hoarding activity of Apodemus mice on the regeneration and spreading of acorn-producing tree species, I studied the population dynamics and hoarding behavior of Apodemus mice, the acorn production of Pasania edulis, and its mortalities from acorn-production to seedling-establishment. A.speciosus and A.argenteus showed the same seasonal changes in their numbers every year ; the population was largest in spring, decreased during summer and fall, and then increased from late fall. The annual changes in the number of resident mice during winter and the acorn production of P.edulis did not always correspond. The masting of P.edulis acorns was recorded every 3-4 years, and in the mast years, the percentage of empty acorns was low. Apodemus mice transported dropped acorns 10-50m, on average, and hoarded them in the soil. The percentage of the transported acorns varied with the intensity of predation by middle- and large-sized mammals such as wild bores. About 60% of cached acorns were recovered by their hoarders and about 40% of them were stolen by mice other than the hoarders. In both cases, the recovered acorns were transported farther from their mother trees. I made the life tables of the acorns produced from 1995 to 2008, and conducted a key-factor analysis. The annual changes in the total mortality of acorns during the period from acorn-production on the trees to seedling-establishment (Total K) was determined by the intensity of the predation of dropped acorn by Apodemus mice (k21). The density relationships of Total K and k21 were inversely-density dependent. Out of the 14 years, Apodemus mice could act as seed-dispersers and contribute to the regeneration and spreading of acorn-producing tree species only in three mast years with a low mice population ; 1999, 2003, and 2007, and in the other 11 years, mice seemed to act as seed-predators.

为了阐明姬鼠的囤积行为对产橡子树种再生和扩散的影响，我研究了姬鼠的种群动态和囤积行为、黑姬鼠的橡子生产情况以及从橡子生产到生产过程中的死亡率。幼苗建立。 A.speciosus和A.argenteus每年的数量季节变化相同；春季人口最多，夏季和秋季减少，从秋末开始增加。冬季居住小鼠数量的年度变化与 P.edulis 橡子产量并不总是一致。松果橡子每3-4年记录一次肥大，在肥大年份，空橡子的比例较低。黑线姬鼠平均将掉落的橡子运输10-50m，并将其储藏在土壤中。被运输的橡子的百分比随着野蛀虫等中大型哺乳动物的捕食强度而变化。大约 60% 的储藏橡子被囤积者回收，其中约 40% 被除了囤积者之外的老鼠偷走。在这两种情况下，回收的橡子都被运输到距离母树更远的地方。我对1995年至2008年生产的橡子做了生命表，并进行了关键因素分析。从树上生产橡子到成苗期间橡子总死亡率（总K）的年度变化由黑线鼠（k21）捕食掉落橡子的强度决定。总 K 和 k21 的密度关系与密度成反比。在这 14 年中，黑线姬鼠仅在老鼠数量较少的三年丰年里才能够充当种子传播者，并有助于生产橡子的树种的再生和传播； 1999年、2003年和2007年，以及另外11年，老鼠似乎充当了种子掠食者。

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• 发表时间: 2008
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• 发表时间: 2010
• 期刊: 九州森林研究 63(印刷中(3月発行))
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• 发表时间: 2009
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• 作者: Nakamura;M.;S.Kaneko;Y.Isagi;K.Hta;K.Sone
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アカネズミによるスギ人工林へのマテバシイの堅果の二次散布.

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• 发表时间: 2007
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