Mexico ranks fourth worldwide for its number of species of vascular plants; however, insufficient area has been marked for conservation as Protected Natural Areas (PNAs); 176 PNAs represent 12% of the total surface and encompass only a small portion of the Mexican endemic species. Strategies for setting up conservation zones are often based on identifying biodiversity hotspots to preserve the maximum number of species with the most efficient use of funds. Here we used the richness analysis by grid method based on herbarium specimens to locate zones with a high richness of Cosmos taxa (species and their varieties). Because this approach can lead to omission error, we also obtained an Ecological Niche Model (ENM) for each Cosmos taxon to perform a richness analysis by grid and locate sites with suitable conditions for supporting the most Cosmos taxa. We conducted a panbiogeographic analysis to locate biogeographical nodes, sites of great geobiotic complexity. Western Mexico was thus identified as the highest priority for Cosmos conservation; it has the greatest richness and most suitable conditions for Cosmos and has great biotic complexity. Although one of the largest Mexican PNAs is located in this region, some species with restricted distribution do not occur within this Protected Natural Area (PNA); therefore, a southwest extension of this PNA is proposed.

中文翻译：

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根据丰富程度和航迹分析，西墨西哥州是保护波斯菊（金鸡菊科，菊科）的优先区域

墨西哥因其维管植物种类的数量而排名世界第四；但是，没有足够的区域被标记为自然保护区（PNA）；176个PNA占总面积的12％，仅占墨西哥特有物种的一小部分。建立保护区的策略通常基于确定生物多样性热点，以最有效地利用资金来保护最大数量的物种。在这里，我们使用基于植物标本室标本的网格方法进行的丰富度分析来定位波斯菊类群（物种及其变种）高度丰富的区域。因为这种方法会导致遗漏错误，所以我们还为每个宇宙获得了生态位模型（ENM）分类单元通过网格执行丰富度分析，并找到具有支持大多数Cosmos分类单元的合适条件的站点。我们进行了生物地理学分析，以找到生物地理学节点，这是地球生物极为复杂的地点。因此，西墨西哥被确定为波斯菊保护的最高优先事项；它对宇宙具有最大的丰富性和最合适的条件，并且具有极大的生物复杂性。尽管该地区是墨西哥最大的PNA之一，但在该自然保护区（PNA）内并未出现一些分布受限的物种；因此，提出了该PNA的西南扩展。