Determining climatic and physiographic varia-bles in Mexico's major ecoregions that are limiting to biodi-versity and species of high conservation concern is essential for their conservation. Yet, at the national level to date, few studies have been performed with large data sets and cross-confirmation using multiple statistical analyses. Here, we used 25 endemic, rare and endangered species from 3610 sampling points throughout Mexico and 25 environmental attributes, including average precipitation for different sea-sons of the year, annual dryness index, slope of the terrain; and maximum, minimum and average temperatures to test our hypothesis that these species could be assessed with the same weight among all variables, showing similar indices of importance. Our results using principal component analy-sis, covariation analysis by permutations, and random forest regression showed that summer precipitation, length of the frost-free period, spring precipitation, winter precipitation and growing season precipitation all strongly influence the abundance of tropical species. In contrast, annual precipita-tion and the balance at different seasons (summer and grow-ing season) were the most relevant variables on the temper-ate region species. For dry areas, the minimum temperature of the coldest month and the maximum temperature of the warmest month were the most significant variables. Using these different associations in different climatic regions could support a more precise management and conservation plan for the preservation of plant species diversity in forests under different global warming scenarios.

Pablo Antúnez

División de Estudios de Posgrado,Universidad de la Sierra Juárez,68725 Oax.,México

林业研究（英文版）

[1]Pablo Antúnez-.Main environmental variables influencing the abundance of plant species under risk category)[J].林业研究（英文版）,2022(04):1209-1217

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