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Microbial Community and Enzyme Activity of Forest Plantation, Natural Forests, and Agricultural Land in Chilean Coastal Cordillera Soils

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Despite the global expansion of forest plantations in Chile, their effect on biology properties of soil has still been only scarcely studied. Land use change in the Chilean Coastal Cordillera… Click to show full abstract

Despite the global expansion of forest plantations in Chile, their effect on biology properties of soil has still been only scarcely studied. Land use change in the Chilean Coastal Cordillera (36° to 40° S) is mainly attributed to the conversion of native forest to agriculture and forest plantations (Eucalyptus globulus and Pinus radiata de Don). The aim of this paper was to evaluate the changes in microbial composition (PCR-DGGE) and enzyme activity after the substitution of a native forest (e.g., Nothofagus spp.) by i) fast-growing exotic species or ii) agricultural crops. The most important factors that influence the abundance and diversity of bacteria and the fungi community were the soil organic matter (SOM) content, phosphorous (P-Olsen), calcium (Ca), boron (B), and water-holding capacity. These variables can better predict the microbial community composition and its enzymatic activity in the surface Ah horizon. Land use change also affected chemical soil properties for biogeochemical cycles. However, a detailed understanding of this link is still lacking. On the other hand, the expansion of forest plantations in Chile should be subject to legislation aimed at protecting the biological legacy as a strategy for forest productivity as well as the conservation of native forests and their microbiota.

Keywords: coastal cordillera; land; enzyme activity; community; activity; chilean coastal

Journal Title: Forests
Year Published: 2023

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