Soil physicochemical and biological profiles as indicators for Araucaria forest disturbance levels

Autor(es)

Braga Bertini, Simone Cristina ^{[1, 2]} ; Stromberger, Mary ^[3] ; Basilio Azevedo, Lucas Carvalho ^[1] ; Bran Nogueira Cardoso, Elke Jurandy ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Uberlandia, Inst Ciencias Agr, BR-38410337 Uberlandia, MG - Brazil

^[2] Escola Super Agr Luiz de Queiroz ESALQ USP, Dept Ciencia Solo, BR-13418900 Piracicaba - Brazil

^[3] Colorado State Univ, Dept Soil & Crop Sci, Ft Collins, CO 80523 - USA

• Tipo de documento: Artigo Científico
• Fonte: APPLIED SOIL ECOLOGY; v. 158, FEB 2021.
• Citações Web of Science: 0

Resumo

The Araucaria forest is a sub-type of Atlantic Forest and it is critically endangered because of deforestation. Despite significant researchers' attention, little is known about the microbial and functional soil diversity of this ecosystem. Our aim was to assess structural diversity (phospholipid fatty acid; PLFA), functional diversity (Biolog ecoplates) and physicochemical soil properties to identify which indicators are the most sensitive to alterations in the Araucaria ecosystems. Soils of three different areas (disturbed, reforested, and native Araucaria forest soils), in two parks of Southeast Brazil, were collected in contrasting seasons (dry and rainy). Principal components analysis (PCA) showed that fatty acid profiles, Biolog and physicochemical properties in Araucaria forest soils were more dissimilar between the different park geographic locations than by forest disturbance levels. However, discriminant analysis identified several variables with greater power to discriminate among forest disturbance levels (native, disturbed, and reforested) within each season. Reforested soils were lower in pH, Al+3, and base cation content compared to disturbed and native soils. Soils disturbed by recreational and understory deforestation were sandier in texture and elevated in P compared to native and deforested soils. Native soil microbial communities utilized certain Biolog substrates to a greater extent, depending on season, compared to communities of disturbed and reforested soils. The best discriminating variable among native, disturbed, and reforested soils for both seasons was gamma-hydroxybutyric acid consumption, which was positively related to native, and negatively correlated to disturbed and reforested soils. Thus, gamma-hydroxybutyric acid consumption may be a useful indicator to monitor the recovery of reforested and disturbed Araucaria soils in reference to its native state. (AU)

• Processo FAPESP: 01/05146-6 - Biodiversidade vegetal e de organismos edáficos em ecossistemas de Araucaria angustifolia naturais e impactados no estado de São Paulo
• Beneficiário: Elke Jurandy Bran Nogueira Cardoso
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 07/06943-3 - Indicadores de qualidade do solo em florestas de araucária no estado de São Paulo
• Beneficiário: Simone Cristina Braga Bertini
• Modalidade de apoio: Bolsas no Brasil - Doutorado