Reducing greenhouse gas emissions via harvest residue management in eucalyptus afforestation on Brazilian sandy soils.

Introduction: The greenhouse gas balance is a central theme in discussions related to forest ecosystems. In this context, the present study evaluated the impact of five eucalyptus harvest residue management systems on atmospheric C-CO retention in soil, greenhouse gas (GHG) emissions, and the global warming potential (GWP) in plantations.

Methods: The management systems examined were: AR - all harvest residues retained on soil; NB - harvest residues kept on soil, except bark; NBr - harvest residues kept on soil, except branches; NR - all harvest residues (bark, branches, leaves) removed; NRs - all residues from the previous rotation and new plantation litter removed using shade cloth.

Diversity of rhizobia, symbiotic effectiveness, and potential of inoculation in Acacia mearnsii seedling production.

Black wattle (Acacia mearnsii) is a forest species of significant economic importance in southern Brazil; as a legume, it forms symbiotic associations with rhizobia, fixing atmospheric nitrogen. Nonetheless, little is known about native rhizobia in soils where the species is cultivated. Therefore, this study aimed to evaluate the diversity and symbiotic efficiency of rhizobia nodulating A.

Genomic Metrics Applied to (): Species Reclassification, Identification of Unauthentic Genomes and False Type Strains.

Taxonomic decisions within the order have relied heavily on the interpretations of highly conserved 16S rRNA sequences and DNA-DNA hybridizations (DDH). Currently, bacterial species are defined as including strains that present 95-96% of average nucleotide identity (ANI) and 70% of digital DDH (dDDH). Thus, ANI values from 520 genome sequences of type strains from species of order were computed.