Biogeographic Barriers in the Andes: Is the Amotape—Huancabamba Zone a Dispersal Barrier for Dry Forest Plants?1
Biogeographic Barriers in the Andes: Is the Amotape—Huancabamba Zone a Dispersal Barrier for Dry Forest Plants?1
复制标题
安第斯山脉的生物地理障碍：阿莫塔佩—万卡班巴区是干燥森林植物的扩散障碍吗？1
DOI：
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发表时间：
2017
影响因子：
1.9
通讯作者：
H. Balslev
中科院分区：
文献类型：
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作者：
Catalina Quintana;Catalina Quintana;R. Pennington;C. Ulloa;H. Balslev
摘要
我们调查了安第斯山脉的阿莫塔佩-万卡班巴地区是否充当植物物种迁徙的屏障或走廊。我们根据在厄瓜多尔干燥的安第斯山脉间山谷 (DIAV) 收集的树木、灌木和草本植物的数据来检验这一假设。我们发现，72%的物种沿南北方向穿越阿莫塔佩-万卡班巴地区，13%的物种沿东西方向穿越安第斯山脉。南部 DIAV 集中了最多数量的特有物种。在区域层面，我们发现 43% 的物种仅分布在安第斯山脉，而其余 57% 则分布在太平洋低地、加勒比海和中美洲。这些结果显示，许多物种以南北方向穿越阿莫塔佩-万卡班巴地区，并且在邻近的低地和高地生态系统中也经常发现，这表明阿莫塔佩-万卡班巴地区是安第斯山脉间干燥植物群物种迁移的走廊。
Abstract
We investigate whether the Amotape—Huancabamba zone in the Andes acts as a barrier or corridor for plant species migration. We test this hypothesis based on data on trees, shrubs, and herbs collected in dry inter-Andean valleys (DIAVs) of Ecuador. We found that 72% of the species cross the Amotape—Huancabamba zone in a north—south direction and 13% of the species cross the Andes in an east—west direction. Southern DIAVs concentrate the highest numbers of endemic species. At the regional level we found that 43% of the species are exclusively Andean, while the remaining 57% are found in the Pacific lowlands, the Caribbean, and Mesoamerica. These results showing many species crossing the Amotape—Huancabamba zone in a north—south direction and also frequently found in neighboring lowland and highland ecosystems suggest that the Amotape—Huancabamba zone acts as a corridor for species migration of dry inter-Andean flora.