Nitrogen-fixing trees in mixed forest systems regulate the ecology of fungal community and phosphorus cycling

The Science of the Total Environment
Arthur Prudêncio de A PereiraElke J B N Cardoso

Abstract

The fungal community plays an important role in forest ecosystems via the provision of resources to plant nutrition and productivity. However, the ecology of the fungal network and its relationship with phosphorus (P) dynamics remain poorly understood in mixed forest plantations. Here, we analyzed the fungal community using the amplicon sequencing in plantations of pure Eucalyptus grandis, with (E + N) and without N fertilization (E), besides pure Acacia mangium (A), and in a consortium of E. grandis and A. mangium (E + A), at 27 and 39 months after planting. We analyzed chemical, physical and biochemical soil and litter attributes related to P cycling, and the fungal community structure to find out if mixed plantations can increase fungal connections and to identify their role in the P dynamics in the soil-litter system. Soil organic fraction (OF), phosphorus in OF, total-P and acid phosphatase activity were significantly higher in E + A and A treatments regardless of the sampling period. Total N and P, richness, and Shannon diversity of the fungi in the litter was significantly higher in the treatments E + A and A. The fungal community structure in litter differed between treatments and sampling periods, and E + A showed an i...Continue Reading

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