Abstract in English:

Abstract The aimed of this study was to assess the biological resistance of Combretum leprosum and Erythroxylum pungens wood to termites and xylophagous fungi. Five trees per species were collected. For bioassays, the sampling was carried out in two positions in pith-bark direction. In the termite choice feeding bioassay, E. pungens wood showed the lowest mass losses (1.03%). The positions on the trunk did not influence deterioration by soft rot fungi. In the soil bed test, the E. pungens species was the most resistant in both positions evaluated. In general, E. pungens wood was the most resistant in all the tests carried out, with wood from the transition region being the most susceptible.

Abstract in English:

Abstract Understanding the trajectory of microbial biotechnology research is essential for identifying novel processes, techniques, and applications to enhance the efficiency and sustainability of bioeconomic activities. This paper provides a comprehensive overview of global research on microbial applications in forestry-related industries to elucidate key research themes and trends within this domain. Through topic modeling of publications on microbial applications in wood and wood-based products, we identified 14 distinct topics from a dataset of 805 abstracts containing 152,265 terms. A continuing surge of research was found, particularly on microbial enzymes employed primarily in pulp and paper production. There was also a rising publication trend related to microbe applications in bioenergy and agarwood, reflecting an increasing interest in diversifying forest-based bioeconomy. Most scientific publications originated from major producers and traders of forest-based products. To advance bioeconomic objectives, it is critical to foster increased collaborative research on microbe-based technologies within the forestry industry.

Abstract in English:

Abstract This study aimed to determine the resistance of Eucalyptus wood clones after exposure to the soil in a decay field. Samples taken from the heartwood of 3 Eucalyptus camaldulensis x Eucalyptus grandis hybrid trees were used for the pyroligneous liquor, chromated copper borat, and untreated treatments, where physical, chemical, and mechanical tests were used for evaluation. Chemical and mechanical analysis demonstrated that there was interaction between factors and significant differences between and within treatments. Wood treated with pyroligneous liquor showed lower solubility in cold water when compared to CCB and, therefore, lower leaching. Both treatments were statistically equal in terms of MOR resistance and mass loss. It was concluded that treating Eucalyptus wood with pyroligneous acid, compared to treatment with CCB and untreated wood, was equally efficient mainly for the property of resistance to static bending, showing potential as a preservative product.

Abstract in English:

Abstract Riparian zones are important areas for biodiversity and preservation, where springtails and fungi contribute to nutrient cycling and organic matter decomposition. This study aimed to report a mycophagy interaction involving a colony of Anurida granaria with Peziza arvernensis. In the riparian zone, the use of apothecia as a nutritional source for springtail colonies was investigated. The collected data were analyzed, considering the fungal structures and the number of springtails. A colony of 515 springtails found in the apothecium was observed over a period of 5 weeks. Feeding events, courtship behavior, molting, and oviposition were recorded. The survival and mortality rates of the colony fluctuated during the observation period but remained stable between weeks 4 and 5. This study presents the first report involving P. arvernensis and A. granaria in a mycophagic association, highlighting the significance of this dynamic in benefiting the life cycle and fungal dispersion in riparian zones.

Abstract in English:

Abstract Human activities in the tropics, particularly large-scale deforestation, significantly contribute to rising greenhouse gas emissions. The carbon storage capacity of the Atlantic Forest, specifically in seasonal forests, needs to be better understood. Therefore, we analyzed the aboveground carbon stock (AGC) in a semideciduous seasonal forest (SSF) remnant in southeastern Minas Gerais through comprehensive vegetation inventory and wood density sampling. The 20 species that counted for half of the total basal area corresponded to a surprising AGC of 58.05 Mg.ha-1. The AGC found is similar to other studies in second-growth SSF, especially the ones with no recent record of human disturbance. However, besides the natural process of increasing AGC in forests over the years, long-term decreasing trends in other forest ecosystems in Brazil have already been reported. Future long-term studies are crucial to understanding how the forest carbon stock will respond to the ongoing environmental and climate change scenario.