SEED-DISPERSAL OF VOUACAPOUA-AMERICANA (CAESALPINIACEAE) BY CAVIOMORPH RODENTS IN FRENCH-GUIANA
SEED-DISPERSAL OF VOUACAPOUA-AMERICANA (CAESALPINIACEAE) BY CAVIOMORPH RODENTS IN FRENCH-GUIANA
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DOI：
10.1017/s0266467400004867
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发表时间：
1990-11-01
影响因子：
1.4
通讯作者：
FORGET, PM
中科院分区：
文献类型：
--
作者：
FORGET, PM
一个可能的互惠传播系统之间的大种子树的法属圭亚那，美洲树（Caesalpiniaceae），和caviomorph啮齿动物，Myoprocta exilis和Dasyprocta leporina，被描述。在雨季开始的时候，Mast fruiting的Escheracapoua正好与分散囤积的种子传播相吻合。在雨季，三个地点几乎100%的标记种子被移走：近70%被掩埋，其余的被哺乳动物吃掉。未埋的种子受到昆虫的攻击和/或失去发芽的能力。啮齿动物更喜欢未发芽的种子，对发芽的种子没有兴趣。种子被单独埋在棕榈树、树枝、原木、藤本植物、树根和树木等自然物体附近。啮齿动物捕食后，幼苗分布没有不同的种子分布。大多数种子被运送到距离饲养区不到5米的地方，但有些种子被运送到22.4米的地方。在接下来的一个月里，40%到85%的分散的种子被啮齿动物取回并吃掉。由于胚乳储备的快速耗尽，腔形啮齿动物对发芽的种子不感兴趣，在资源稀缺的漫长旱季，阻止了囤积的的进食。从被遗忘或被遗弃的缓存种子出现的幼苗似乎增加了美洲的补充。
A possible mutualistic dispersal system between a large-seeded tree of French Guiana, Vouacapoua americana (Caesalpiniaceae), and caviomorph rodents, Myoprocta exilis and Dasyprocta leporina, is described. Mast fruiting of Vouacapoua at the beginning of the wet season coincides with scatter-hoarding seed dispersal. During the wet season, almost 100% of marked seeds on three sites were removed: nearly 70% were buried and the rest were eaten by mammals. Unburied seeds were attacked by insects and/or lost their ability to germinate. Rodents preferred ungerminated seeds, and had no interest in germinated seeds. Seeds were buried individually near natural objects such as palms, branches, logs, lianas, roots and trees. After predation by rodents, seedling distribution did not differ from seed distribution. Most seeds were transported less than 5 m from the feeding plots but some were carried as far as 22.4 m. Between 40 and 85% of dispersed seeds were retrieved during the following month by rodents and eaten. The disinterest of caviomorph rodents in germinated seeds, because of rapid exhaustion of endosperm reserves, prevents feeding from hoarded Vouacapoua during the long dry season when resources are scarce. Seedlings emerging from forgotten or abandoned cached seeds appear to increase the recruitment of Vouacapoua americana.