This study reviews and synthesizes information regarding swamps exposed to permanent waterlogging throughout the two Brazilian biodiversity hotspots: the Cerrado and the Atlantic Forest. Our aims were to answer the following questions related to tree composition in these swamps: i) how do climatic and geographical variation influence the similarity and diversity of the swamps? ii) which are the most common species and how do they differ between the hotspots? iii) what is the floristic similarity between the swamps? and iv) what are the threats to which the forests are exposed? Diversity is related to variations in rainfall and temperature that are influenced both by distance from the Atlantic Ocean and altitude. Although sharing key species, the species composition of the swamps shows greater similarity with their surrounding biome than with each other. Swamps are mainly threatened by logging and fragile conservation policies. At least 11 species occurring in this plant community are endangered, reinforcing the need for stricter conservation measures. We offer an updated list of species occurrence and identify species that are the most characteristic of swamp vegetation.

这项研究回顾并综合了关于在巴西的两个生物多样性热点（塞拉多和大西洋森林）永久浸水的沼泽的信息。我们的目的是回答以下与这些沼泽中树木组成有关的问题：i）气候和地理变化如何影响沼泽的相似性和多样性？ii）哪些是最常见的物种？热点之间的区别是什么？iii）沼泽之间的植物相似性是什么？iv）森林所面临的威胁是什么？多样性与降雨和温度的变化有关，该变化受距大西洋的距离和海拔高度的影响。虽然共享关键物种，沼泽的物种组成与其周围的生物群落比彼此具有更大的相似性。沼泽主要受到伐木和脆弱的保护政策的威胁。该植物群落中至少有11种物种处于濒危状态，因此需要采取更严格的保护措施。我们提供了物种发生的更新列表，并确定了沼泽植被最具特征的物种。