An updated plant checklist of the Brazilian Caatinga seasonally dry forests and woodlands reveals high species richness and endemism
An updated plant checklist of the Brazilian Caatinga seasonally dry forests and woodlands reveals high species richness and endemism
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DOI：
10.1016/j.jaridenv.2019.104079
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发表时间：
2020-03-01
影响因子：
2.7
通讯作者：
de Queiroz, Luciano P.
中科院分区：
文献类型：
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作者：
Fernandes, Moabe F.;Cardoso, Domingos;de Queiroz, Luciano P.
植物清单构成了关于生态、进化和生物多样性保护的进一步假设的基础知识。在这里，我们编制了一份全面的、经过分类验证的卡丁加开花植物种类清单。我们将Caatinga限定为仅包括巴西东北部的干燥落叶植被，对应于南美洲季节性干燥热带森林和林地生物群(SDTFW)最大的连续核心。共记录到鸟类153科962属3347种，其中特有种29属526种，其中非木本成分对物种多样性的贡献较大。这些数字表明，卡廷加的植物区系多样性非常高，与亚马逊雨林(2.5x10(-3)种/公里(2))相比，物种/面积比(4.0x10(-3)种/公里(2))几乎高出两倍。大多数生活在卡丁加的物种与其他非SDTFW热带生物群共享，可能反映了与周围稀树草原和热带雨林的过渡地带。这份新汇编的分类清单预计不仅将作为对卡丁加植物多样性的身份和计数的最新观察，而且还将为更好地了解这种物种丰富但高度濒危的南美洲植被的起源、进化和生态功能提供帮助。
Plant checklists constitute the fundamental knowledge on which further hypotheses of ecology, evolution, and biodiversity conservation are built. Here, we compiled a comprehensive and taxonomically verified checklist of the flowering plant species occurring in the Caatinga. We circumscribe Caatinga to include only the dry deciduous vegetation in Northeast Brazil, corresponding to the largest continuous nucleus of the seasonally dry tropical forest and woodland biome (SDTFW) in South America. We recorded 3347 species, 962 genera, and 153 families, of which 526 species and 29 genera are endemic, and the large contribution of its non-woody component to overall diversity. These numbers reveal a remarkably high floristic diversity in the Caatinga, representing almost two fold higher species/area ratio (4.0 x 10(-3) species/km(2)) as compared to the Amazon rainforests (2.5 x 10(-3) species/km(2)). Most Caatinga-inhabiting species are shared with other non-SDTFW tropical biomes, probably reflecting transition zones with surrounding savannas and rain forests. This newly assembled taxonomic checklist is expected to serve not only as an updated look at the identity and counting of the Caatinga plant diversity, but will also provide aids for better understanding the origin, evolution, and ecological function of this species-rich, but highly threatened South American vegetation.