Aagesen Lone, Szumik Claudia A, Zuloaga Fernando O, Morrone Osvaldo
Instituto de Botánica Darwinion, Labardén 200, CC 22, San Isidro B1642HYD, Argentina.
Instituto Superior de Entomología, Instituto Miguel Lillo, Miguel Lillo 205, 4000 San Miguel de Tucumán, Argentina.
Cladistics. 2009 Jun;25(3):295-310. doi: 10.1111/j.1096-0031.2009.00248.x. Epub 2009 Feb 24.
The distribution data of 340 grass species sampled in a region of 53.219 km in the northwestern corner of Argentina (between ∼21°S and ∼24°S) were analyzed to search for concordance in species distributions by using the program NDM/VNDM. Here, the traditional biogeographic hypothesis proposed for the region is evaluated for the first time by using a quantitative method and an optimal criterion specifically developed within the context of areas of endemism. Three different grid sizes (0.5° × 0.5°, 0.35° × 0.35 ° and 0.2° × 0.2°) were used to analyze three nested data sets: species found in the Andes of Argentina, Bolivia and/or Chile; Andean distributed species; and all grass species found in the study region. The main areas supported by the analyses correspond generally to the traditional biogeographic hypothesis proposed for the region. Local distribution patterns defined by species restricted to the study region were best supported under the small grid sizes, while the bigger grid sizes recovered areas defined by species with a broader distribution. The local distribution patterns emerged in all the analyses even when widespread species were added to the data set. © The Willi Hennig Society 2009.
对在阿根廷西北角一个面积为53219平方千米的区域（南纬约21°至24°之间）采集的340种草种的分布数据进行了分析，以使用NDM/VNDM程序寻找物种分布的一致性。在此，首次通过使用一种定量方法以及在特有地区背景下专门开发的最优标准，对该区域提出的传统生物地理学假说进行评估。使用三种不同的网格大小（0.5°×0.5°、0.35°×0.35°和0.2°×0.2°）来分析三个嵌套数据集：在阿根廷、玻利维亚和/或智利安第斯山脉发现的物种；安第斯山脉分布的物种；以及在研究区域发现的所有草种。分析支持的主要区域总体上与该区域提出的传统生物地理学假说相符。在小网格大小下，由仅限于研究区域的物种定义的局域分布模式得到了最佳支持，而较大的网格大小则恢复了由分布更广的物种定义的区域。即使将广泛分布的物种添加到数据集中，所有分析中都出现了局域分布模式。© 威利·亨尼希学会2009年。
