Programa de Pós-Graduação em Biologia de Fungos, Universidade Federal de Pernambuco, Av. da Engenharia, s/n, Cidade Universitária, CEP 50740-600, Recife, PE, Brazil.
Embrapa Milho e Sorgo, Núcleo de Biologia Aplicada, Rod. MG 424 KM 45, Bairro Esmeraldas, s/n, Caixa Postal 285, CEP 35701-970, Sete Lagoas, MG, Brazil.
Microb Ecol. 2017 Oct;74(3):654-669. doi: 10.1007/s00248-017-0979-x. Epub 2017 Apr 11.
Although sandy coastal plains are important buffer zones to protect the coast line and maintain biological diversity and ecosystem services, these ecosystems have been endangered by anthropogenic activities. Thus, information on coastal biodiversity and forces shaping coastal biological diversity are extremely important for effective conservation strategies. In this study, we aimed to compare arbuscular mycorrhizal (AM) fungal communities from soil samples collected on the mainland and nearby islands located in Brazilian sandy coastal plain ecosystems (Restingas) to get information about AM fungal biogeography and identify factors shaping these communities. Soil samples were collected in 2013 and 2014 on the beachfront of the tropical sandy coastal plain at six sites (three island and three mainland locations) across the northeast, southeast, and south regions of Brazil. Overall, we recorded 53 AM fungal species from field and trap culture samples. The richness and diversity of AM fungal species did not differ between mainland and island locations, but AM fungal community assemblages were different between mainland and island environments and among most sites sampled. Glomeromycota communities registered from island samples showed higher heterogeneity than communities from mainland samples. Sandy coastal plains harbor diverse AM fungal communities structured by climatic, edaphic, and spatial factors, while the distance from the colonizing source (mainland environments) does not strongly affect the AM fungal communities in Brazilian coastal environments.
尽管沙质沿海平原是保护海岸线和维持生物多样性和生态系统服务的重要缓冲区，但这些生态系统已受到人为活动的威胁。因此，有关沿海生物多样性和塑造沿海生物多样性的力量的信息对于有效的保护策略极为重要。在这项研究中，我们旨在比较从巴西沙质沿海平原生态系统（Restingas）的大陆和附近岛屿上采集的土壤样本中的丛枝菌根（AM）真菌群落，以获取有关 AM 真菌生物地理学的信息，并确定塑造这些群落的因素。土壤样本于 2013 年和 2014 年在巴西东北部，东南部和南部六个地点（三个岛屿和三个大陆地点）的热带沙质沿海平原的海滨采集。总体而言，我们从实地和诱捕培养样本中记录了 53 种 AM 真菌。AM 真菌物种的丰富度和多样性在大陆和岛屿位置之间没有差异，但 AM 真菌群落组合在大陆和岛屿环境之间以及大多数采样地点之间存在差异。从岛屿样本中记录的Glomeromycota 群落比从大陆样本中记录的群落具有更高的异质性。沙质沿海平原拥有由气候，土壤和空间因素构成的多样化 AM 真菌群落，而与殖民源（大陆环境）的距离并不强烈影响巴西沿海环境中的 AM 真菌群落。
