Why does the biota of the Madagascar region have such a strong Asiatic flavour?
Why does the biota of the Madagascar region have such a strong Asiatic flavour?
复制标题
DOI：
10.1111/j.1096-0031.2009.00300.x
复制
发表时间：
2010-10
期刊：
影响因子：
3.6
通讯作者：
B. Warren;D. Strasberg;J. Bruggemann;R. Prŷs-Jones;C. Thébaud
中科院分区：
文献类型：
--
作者：
B. Warren;D. Strasberg;J. Bruggemann;R. Prŷs-Jones;C. Thébaud
岛屿地理学理论的一个推论是，岛屿主要是从最近的大陆来源殖民的。尽管马达加斯加与印度极端隔绝，靠近非洲，但马达加斯加地区的生物群中有很大一部分与亚洲有亲缘关系。这种模式很少被认为是令人惊讶的，因为它与冈瓦纳的间接作用是一致的。分子系统发育数据为这种亚洲亲缘关系提供了强有力的支持，但通常不是他们的替代起源;亚洲和马达加斯加地区的血统之间的大多数分歧都发生在印度和马达加斯加分离之后相当长的时间（高达8700万年），这意味着高频率的传播反映了夏威夷群岛的殖民化。印度洋水深测量和近期海平面低水位的大小支持西印度洋上重复存在的大型岛屿，大大减少了马达加斯加与亚洲的隔离。我们提出了预测，以测试的作用，这一历史因素的组装区域生物群。
A corollary of island biogeographical theory is that islands are largely colonized from their nearest mainland source. Despite Madagascar’s extreme isolation from India and proximity to Africa, a high proportion of the biota of the Madagascar region has Asian affinities. This pattern has rarely been viewed as surprising, as it is consistent with Gondwanan vicariance. Molecular phylogenetic data provide strong support for such Asian affinities, but often not for their vicariant origin; most divergences between lineages in Asia and the Madagascar region post‐date the separation of India and Madagascar considerably (up to 87 Myr), implying a high frequency of dispersal that mirrors colonization of the Hawaiian archipelago in distance. Indian Ocean bathymetry and the magnitude of recent sea‐level lowstands support the repeated existence of sizeable islands across the western Indian Ocean, greatly reducing the isolation of Madagascar from Asia. We put forward predictions to test the role of this historical factor in the assembly of the regional biota.