Abstract

Despite the huge biodiversity of the Cerrado biome, a synthesis on the distribution of genetic diversity across the biome is still wanting. We describe patterns of plant genetic variation across the Cerrado biome, highlighting areas of high diversity and priority areas for conservation. We also analyze the relative importance of environmental characteristics and human footprints on patterns of genetic variation. Raw genetic data comes primarily from central and southeastern Brazil, outside conservation units (CUs). Standardized estimated genetic richness (G_est) decreases in a north–south gradient. Populations with high genetic diversity (He) and allelic richness (AR) are widespread across the biome, but both increase with distance from the center of Cerrado. Environmental variables related to energy, temperature and precipitation are associated with G_est and AR, but not He. G_est is higher in northern Cerrado, in regions with low human development index (HDI). Conversely, southern Cerrado shows higher HDI and lower genetic richness, most likely due to both high habitat fragmentation and loss. CUs in northern Cerrado tend to have higher G_est, whereas those in southeast and central Cerrado have higher He and AR. The high genetic diversity and richness in the few populations studied in northern Cerrado, coupled with the low data availability, reveal the importance of encouraging genetic studies in this region. Moreover, very limited information about population genetic diversity is available from CUs, which may constrain the access of species conservation status and decision-make on management of populations inside CUs.

中文翻译：

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空间明确分析揭示了塞拉多生物群落的遗传多样性分布和植物保护状况

摘要

尽管塞拉多生物群落具有巨大的生物多样性，但仍需要对整个生物群落的遗传多样性分布进行综合分析。我们描述了整个塞拉多生物群落的植物遗传变异模式，重点介绍了高度多样性的地区和需要保护的重点地区。我们还分析了环境特征和人类足迹对遗传变异模式的相对重要性。原始遗传数据主要来自巴西中部和东南部，保护单位（CU）之外。标准化估计的遗传丰富度（G _est）以南北梯度递减。遗传多样性高（He）和等位基因丰富（AR）的人群）遍及整个生物群落，但两者都随着距Cerrado中心的距离而增加。与能量，温度和降水有关的环境变量与_Gest和AR相关，而与He不相关。ģ _EST是在塞拉多北部更高，在具有低人类发展指数（HDI）的区域。相反，南部的塞拉多地区显示出更高的人类发展指数和更低的遗传丰富度，这很可能是由于高栖息地破碎化和丧失造成的。在的CU塞拉多北部往往有较高的摹_EST，而那些在东南部和中部塞拉多有较高的他和AR。在塞拉多北部进行的少数研究中，高遗传多样性和丰富性，加上数据可用性低，揭示了鼓励对该地区进行遗传研究的重要性。此外，CUs提供的关于种群遗传多样性的信息非常有限，这可能会限制物种保护状态的获取和CUS内部种群管理的决策。