An overview of the self-organizing map algorithm, on which the papers in this issue are based, is presented in this article.

The Self-Organizing Map

Responses of enzymatic activity and microbial communities to biochar/compost amendment in sulfamethoxazole polluted wetland soil

A systematic review of antibiotics and antibiotic resistance genes in estuarine and coastal environments

Antibiotic Resistance Genes in the Human-Impacted Environment:A One Health Perspective

Heavy metal copper accelerates the conjugative transfer of antibiotic resistance genes in freshwater microcosms.

Different fertilization and cropping systems may influence short- and long-term residues of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) in soil. Soils from dryland (peanut) and paddy (rice) fields, which originated from the same nonagricultural land (forested), were treated with either chemical fertilizer, composted manure, or no fertilizer for 26 years before sampling, which occurred one year after the last applications. ARGs and MGEs were investigated using highly parallel qPCR and high-throughput sequencing. Six of the 11 antibiotics measured by LC–MS/MS were detected in the manure applied soil, but not in the nonmanured soils, indicating their source was from previous manure applications. Compared to the unfertilized control, manure application did not show a large accumulation of ARGs in either cropping system but there were some minor effects of soil management on indigenous ARGs. Paddy soil showed higher accumulation of these ARGs, which corresponded to higher microbial bi...

James M. Tiedje

Papers

Long-Term Effect of Different Fertilization and Cropping Systems on the Soil Antibiotic Resistome.

Section 7 update: Multivariate statistical methods and artificial neural networks for analysis of microbial community molecular fingerprints