Impact of volcanic activity on a plant-pollinator module in an island ecosystem:: the example of the association of Camellia japonica and Zosterops japonica
Impact of volcanic activity on a plant-pollinator module in an island ecosystem:: the example of the association of Camellia japonica and Zosterops japonica
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DOI：
10.1007/s11284-007-0345-4
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发表时间：
2008-01-01
影响因子：
2
通讯作者：
Hasegawa, Masami
中科院分区：
文献类型：
--
作者：
Abe, Harue;Hasegawa, Masami
火山活动为研究生物对环境破坏的生态反应提供了一个不可或缺的机会。我们研究了山茶树的繁殖成功，以确定火山活动如何影响叶存活，开花活动，果实和种子生产，传粉者丰度，传粉者访问频率，授粉率，果实和种子成熟的过程中，在不同的损害地点三宅岛，经历了爆发在2000年夏天。火山气体对树叶的存活产生负面影响，并减少严重受损地区的开花活动。花粉转移是足够的，以确保较高的授粉率（83%）发生在严重受损的地区比在受损较轻的地区（26-45%），但授粉密度较低，在响应减少花卉资源。果实败育率在严重受损的网站（78%）比在受损较轻的网站（53-63%）。因此，坐果率（16-29%）没有显着差异网站之间。随着火山破坏的增加，结实率趋于增加。结实率和种子质量之间的负相关性表明，种子质量下降，在严重受损的网站是由于观察到有更好的授粉率。这些结果表明，补偿机制确保更好的繁殖成功的网站，更强烈地受到火山活动的影响。
Volcanic activity provides an indispensable opportunity to study the ecological responses of organisms to environmental devastation. We examined the reproductive success of Camellia trees to identify how volcanic activity affects the processes of leaf survival, flowering activity, fruit and seed production, pollinator abundance, pollinator visitation frequency, pollination rate, and fruit and seed maturation at different damage sites on Miyake-jima, which experienced an eruption in the summer of 2000. Volcanic gases negatively affect leaf survival and reduce flowering activity in heavily damaged areas. Pollen transfer was sufficient to ensure that higher pollination rates (83%) occurred in heavily damaged areas than in less damaged areas (26-45%), but pollinator densities were lower in response to reduced flower resources. Fruit abortion rates were greater in heavily damaged sites (78%) than in less-damaged sites (53-63%). Consequently, fruit-set rates (16-29%) did not differ significantly among sites. Seed set rates tended to increase with increasing volcanic damage. The negative correlation between seed-set rates and seed mass suggests that the decreased seed mass in severely damaged sites was attributable to the better pollination rates observed there. These results indicate that compensation mechanisms ensure better reproductive success at sites that are more strongly affected by volcanic activity.