Highly mobile seed predators contribute to interisland seed dispersal within an oceanic archipelago
Highly mobile seed predators contribute to interisland seed dispersal within an oceanic archipelago
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高度机动的种子捕食者有助于海洋群岛内的岛间种子传播
DOI：
10.1111/oik.08068
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发表时间：
2021
期刊：
影响因子：
3.4
通讯作者：
Sato Nozomu J.
中科院分区：
文献类型：
--
作者：
Ando Haruko;Mori Yuka;Nishihiro Miho;Mizukoshi Kanon;Akaike Masaki;Kitamura Wataru;Sato Nozomu J.
远距离扩散(LDD)是海洋岛屿生态系统中物种定居和扩张的重要事件。鸟类的内生作用是促进植物种子LDD的重要因素，但其在岛间种子传播中的作用尚不清楚。在这里，我们展示了一种可能的种子捕食性鸽子，日本林鸽，在日本伊豆群岛的海洋岛屿之间传播种子。虽然之前的一些研究表明，这种鸽子吞下的大部分种子都是被碾碎的，但在44.5%的鸽子粪便中发现了完整的种子，这表明这些鸟类对种子传播做出了贡献。季节种群波动和鸽子在相距4公里的邻近岛屿之间的迁徙可以促进岛间种子的传播。我们发现了不在收集鸽子粪便的岛屿上的果树种子，这些种子可能是从另一个岛屿运来的。尽管许多树种的结果物候与鸽子在岛间的迁徙重叠，但只有6种树种的种子被鸽子传播，而且大部分散布的种子来自直径小于1.5 mm的小种子。日本木鸽对果实的消耗和频繁的岛间移动可能会使种子较小的植物在邻近岛屿之间的分布更加均匀。相比之下，它们密集的种子消耗可能会扰乱对拥有大种子的植物的招募，并使它们难以扩展到其他岛屿。与高度移动的种子捕食者的互惠(分散)和对抗(捕食)相互作用的这种影响可能会改变海洋群岛中的植物分布和基因流动。
Long‐distance dispersal (LDD) is an essential event for species colonization and expansion in oceanic island ecosystems. Endozoochory by birds is an important factor promoting the LDD of plant seeds, but its contribution to interisland seed dispersal is still unclear. Here, we show possible seed dispersal by a seed predator pigeon, the Japanese wood pigeonColumba janthina, among oceanic islands in the Izu archipelago, Japan. Although some previous studies showed that most seeds swallowed by this pigeon are crushed, intact seeds were found in 44.5% of pigeon feces, indicating the contribution of these birds to seed dispersal. Seasonal population fluctuations and movements by pigeons between neighbouring islands which are 4 km apart by pigeons can promote interisland seed dispersal. We found seeds from fruiting trees not located on the islands where the pigeon feces were collected, which could have been transported from another island. Although many tree species overlap their fruiting phenology with pigeon movement between islands, the seeds of only six species were dispersed by pigeons, and most of the dispersed seeds were from species with small seeds less than 1.5 mm in diameter. Fruit consumption and frequent interisland movement of Japanese wood pigeons might homogenize the distribution of plants with small seeds among neighboring islands. In contrast, their intensive seed consumption might disturb the recruitment of plants with large seeds and make their expansion to other islands difficult. Such effects of mutualistic (dispersal) and antagonistic (predation) interactions with highly mobile seed predators may modify plant distributions and gene flow in oceanic archipelagos.
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影响因子：
1.7
作者：
G. Hanya
通讯作者：
G. Hanya
2,3,5-三烯基氯化四唑作为桑树种子发芽率测定方法的应用
DOI：
10.11416/kontyushigen1930.33.55
发表时间：
1964
期刊：
The journal of sericultural science of Japan
影响因子：
--
作者：
Katsuo Oyama;Shigeyoshi Hamada
通讯作者：
Shigeyoshi Hamada
被忽视的种子远距离传播到海洋岛屿和海洋岛屿之间的机制的证据。
影响因子：
9.4
作者：
M. Nogales;Ruben H. Heleno;A. Traveset;P. Vargas
通讯作者：
P. Vargas
影响因子：
2.9
作者：
McConkey, Kim R.;Drake, Donald R.
通讯作者：
Drake, Donald R.
夏威夷和加尔帕戈斯海洋群岛的比较保护生物学
影响因子：
10.1
作者：
L. Loope;O. Hamann;C. P. Stone
通讯作者：
C. P. Stone