Biocrust cover and successional stages influence soil bacterial composition and diversity in semiarid ecosystems
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Miralles Mellado, Isabel; Lázaro Suau, Roberto; Sánchez Marañón, Manuel; Soriano Rodríguez, Miguel; Ortega Pérez, RaúlFecha
2020-03-20Resumen
Biocrusts are an important drylands landscape component, which enriches the upper millimeters of the soil with organic matter and initiates biogeochemical cycles. However, little is known about the influence of biocrusts on soil bacterial community structure and diversity. Different biocrust types representing a successional gradient were studied. This gradient, from the earliest to the latest successional stages, consisted of an incipient cyanobacterial biocrust < mature cyanobacterial biocrusts < biocrust dominated by the Squamarina lentigera and Diploschistes diacapsis lichens < Biocrust characterized by the Lepraria isidiata lichen. Moreover, in each biocrust type, four different percentages of biocrust cover were also selected. Soil diversity gradually increased with biocrust successional stage and percentage of biocrust cover. The biocrust cover had an important role in the total abundance of bacteria, generally increasing in soils colonized by the highest percentages of cover. B...
Palabra/s clave
Microbial communities
Lichen
Cyanobacteria
Illumina MiSeq
Chemical soil properties
Drylands