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首页> 外文期刊>Ecological research >Ecological aspects of arbuscular mycorrhizal fungal communities in different habitat types of a Brazilian mountainous area
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Ecological aspects of arbuscular mycorrhizal fungal communities in different habitat types of a Brazilian mountainous area

机译：巴西山区不同生境类型的丛枝菌根真菌群落的生态方面

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摘要

Increasing elevation affects many abiotic factors, such as a temperature decrease and an increase in radiation, as well as multiple biotic characteristics such as richness and composition of plant communities, both of which contribute to the formation of different habitats in mountainous landscapes. Both biotic and abiotic factors also affect belowground arbuscular mycorrhizal fungi (AMF) communities, but there is scarce information available from tropical mountain ecosystems. The objective of this study was to determine the diversity and distribution of AM fungi in different mountainous habitat types in the Chapada Diamantina mountain range in Bahia (NE Brazil). Soil samples were collected in five habitats types: high-altitude cerrado savannas (HAC), natural grasslands (GRA), gallery forests (GAF), in natural rocky rupestrian fields (shrublands; CAR) and in rocky, rupestrian field in the regeneration stage (CRR). A total of 49 AMF species were identified, of which Glomeraceae and Acaulosporaceae species were the most representative families. The AMF communities did not follow the shifts in plant communities. The composition of the AMF communities differed only between CAR and HAC and between CRR and GAF, while the other habitats had similar AMF communities. Our conclusion is that the AMF community assemblages in tropical mountains are related to the heterogeneity of habitats of these ecosystems. In our study, silt and coarse sand contents were the main factors related to the community composition of AMF in the different habitats.
机译：海拔升高会影响许多非生物因素，例如温度降低和辐射增加，以及多种生物特征，例如植物群落的丰富度和组成，这两者都有助于山区景观中不同栖息地的形成。生物和非生物因素也都影响地下丛枝菌根真菌（AMF）社区，但是热带山区生态系统缺乏可用的信息。本研究的目的是确定巴伊亚州（巴西巴西）查帕达·迪亚曼蒂纳山脉不同山区生境类型中AM真菌的多样性和分布。在五个生境类型中收集了土壤样本：高海拔的塞拉多大草原（HAC），天然草地（GRA），长廊森林（GAF），天然石质耕地（灌木丛； CAR）以及再生阶段的石质耕地。 （CRR）。总共鉴定出49种AMF物种，其中最具代表性的科是Glomeraceae和Acaulosporaceae。 AMF社区没有跟随工厂社区的转变。 AMF群落的组成仅在CAR和HAC之间以及CRR和GAF之间有所不同，而其他生境具有相似的AMF群落。我们的结论是，热带山区的AMF群落集合与这些生态系统的栖息地的异质性有关。在我们的研究中，淤泥和粗砂含量是影响不同生境中AMF群落组成的主要因素。

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