Coevolution in an Amazonian hummingbird-plant community
Coevolution in an Amazonian hummingbird-plant community
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DOI：
10.1111/j.1474-919x.1998.tb04709.x
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发表时间：
1998-10-01
期刊：
影响因子：
2.1
通讯作者：
Cotton, PA
中科院分区：
文献类型：
--
作者：
Cotton, PA
蜂鸟和它们的食物植物之间的关系通常被认为是通过共同进化产生的。然而，虽然蜂鸟和植物确实是共同进化的，但共同进化在多大程度上塑造了群落结构和鸟类和植物的形态并不总是很清楚。在这里，我研究了哥伦比亚东南部亚马逊低地雨林的蜂鸟-植物群落，并测试了有关共同进化和群落结构的假设。为了确定相互关系的强度和性状位移发生的程度，采用随机零模型对3个花性状（开花物候、花蜜产量和花冠长度）和2个蜂鸟性状（茎长和觅食生态）的分布进行了统计检验。尽管马塔玛塔的蜂鸟-植物群落是多样的，很可能有一个长期的共同进化历史，但很少有证据表明它们是两两共同进化的。相反，这个群落似乎是通过扩散的共同进化进化而来的，产生了蜂鸟和植物的公会。
Relationships between hummingbirds and their food plants are often considered to have arisen through coevolution, However, while it is certainly the case that hummingbirds and plants are coevolved, it is not always clear to what extent coevolution has shaped community structure and the morphology of the birds and plants. Here I examine the hummingbird-plant community of a lowland Amazonian rainforest in southeastern Colombia and test hypotheses concerning coevolution and community structure. To determine the strength of interrelationships and the degree to which character displacement has occurred, the distributions of three floral traits (flowering phenology, nectar production and corolla length) and two hummingbird traits (culmen length and foraging ecology) have been statistically tested against random null models. Although the hummingbird-plant community at Matamata is diverse and is highly likely to have a long shared evolutionary history, there is little evidence for pairwise coevolution. Instead, the community appears to have evolved through diffuse coevolution, resulting in guilds of hummingbirds and plants.