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Effect of Seed Caching by Parus varius on Germination in Styrax japonica.
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- Murakami T.
- Faculty of Agriculture, Yamagata University
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- Hayashida M.
- Faculty of Agriculture, Yamagata University
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- Ogiyama K.
- Faculty of Agriculture, Yamagata University
Bibliographic Information
- Other Title
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- ヤマガラによる貯蔵散布がエゴノキ種子の発芽に及ぼす影響
- ヤマガラ ニ ヨル チョゾウ サンプ ガ エゴノキ シュシ ノ ハツガ ニ オヨボス エイキョウ
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Description
We examined the seed dispersal and germination of Styrax japonica to determine the effects of the fruit pulp involving saponin and its removal by the varied tit (Parus varius) on the seed germination in a broad-leaved forest of northern Japan. All mature fruits disappeared from the trees by September. Only varied tits visited the trees, and 80% of their visits were spent on transporting mature fruits in four days. As 83.0 to 87.2% of the fruit that disappeared from trees was taken by varied tits, most of the fruit was probably transported from the trees by these birds. The remaining fruits naturally fell to the ground, and their pulp remained until mid November. In a germination experiment in the field, the seeds deliberately extracted from the fruit pulp had a significantly higher rate of germination (mean 36%) than the intact fruits (mean 4%). Since the level of saponin in the fruit pulp decreased after the fruit fell to the ground, it is unlikely that saponin in the fruit pulp prevents seed germination. The caching behavior of varied tits probably contributes not only to seed dispersal but also to seed germination because it accompanies the extraction of fruit pulp, which prevents seed germination.
Journal
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- Journal of the Japanese Forest Society
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Journal of the Japanese Forest Society 88 (3), 174-180, 2006
The Japanese Forest Society
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Details 詳細情報について
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- CRID
- 1390001205227757440
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- NII Article ID
- 110006882799
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- NII Book ID
- AA12003078
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- ISSN
- 1882398X
- 13498509
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- NDL BIB ID
- 8033276
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- Text Lang
- ja
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- Article Type
- journal article
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- Data Source
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- JaLC
- NDL Search
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed