Cerrado是全球最多样化的热带稀树草原,也是南美洲第二大生物群落。这项研究的目的是了解不同类型的天然Cerrado植被和向干燥稀树草原或热带雨林过渡的地区中丛枝菌根真菌(AMF)的异质性和动态,并阐明造成这些差异的驱动因素。生态系统。调查了21个自然地点,包括典型的Cerrado森林,典型的Caatinga,大西洋雨林,Cerrado和Caatinga之间的转换,Cerrado地区靠近Caatinga或雨林,和卡拉斯科网站。从土壤中提取孢子,计数,并进行了形态学分析。总的来说,检测到82种AMF。AMF物种丰富度在36到51之间变化,在Cerrado和Caatinga之间过渡的地区发现的丰富度最高,其次是靠近Caatinga的Cerrado地区和典型的Cerrado森林。Cerrado植被的类型和过渡到Caatinga的地区共享的AMF物种数量最多(32-38)。植被,以及化学和物理土壤参数,影响了AMF社区,这也可能是季节性降雨模式的结果。Cerrado拥有丰富的AMF多样性,因此,AMF的天然避难所。植物和微生物群落以及栖息地的多样性需要Cerrado内的紧急保护,因为它代表一个关键的AMF热点。
The Cerrado is the most diverse tropical savanna worldwide and the second-largest biome in South America. The objective of this study was to understand the heterogeneity and dynamics of arbuscular mycorrhizal fungi (AMF) in different types of natural Cerrado vegetation and areas that are transitioning to dryer savannas or tropical rainforests and to elucidate the driving factors responsible for the differences between these ecosystems. Twenty-one natural sites were investigated, including typical Cerrado forest, typical Caatinga, Atlantic Rainforest, transitions between Cerrado and Caatinga, Cerrado areas near Caatinga or rainforest, and Carrasco sites. Spores were extracted from the soils, counted, and morphologically analyzed. In total, 82 AMF species were detected. AMF species richness varied between 36 and 51, with the highest richness found in the area transitioning between Cerrado and Caatinga, followed by areas of Cerrado close to Caatinga and typical Cerrado forest. The types of Cerrado vegetation and the areas transitioning to the Caatinga shared the highest numbers of AMF species (32-38). Vegetation, along with chemical and physical soil parameters, affected the AMF communities, which may also result from seasonal rainfall patterns. The Cerrado has a great AMF diversity and is, consequently, a natural
refuge for AMF. The plant and microbial communities as well as the diversity of habitats require urgent protection within the Cerrado, as it represents a key AMF hotspot.