GLOBAL SYSTEMS INSTITUTE

Publications

A keystone microbial enzyme for nitrogen control of soil carbon storage

Publication ID: pub.1106288502

Publication date: 22/08/2018

Keywords: Bacteria; Bacterial Proteins; Carbon; Ecosystem; Enzymes; Global; Nitrogen; Soil; Soil Microbiology

Agricultural and industrial activities have increased atmospheric nitrogen (N) deposition to ecosystems worldwide. N deposition can stimulate plant growth and soil carbon (C) input, enhancing soil C storage. Changes in microbial decomposition could also influence soil C storage, yet this influence has been difficult to discern, partly because of the variable effects of added N […]

Enhanced global primary production by biogenic aerosol via diffuse radiation fertilization

Publication ID: pub.1106187452

Publication date: 20/08/2018

Keywords: Biogenic Aerosol; Diffuse Radiation Fertilization; Ecosystem Feedback; Enhancement; Global; Models; Plant Photosynthesis; Plant Productivity; Simulations; Volatile Organic Compound Emissions

Terrestrial vegetation releases large quantities of plant volatiles into the atmosphere that can then oxidize to form secondary organic aerosol. These particles affect plant productivity through the diffuse radiation fertilization effect by altering the balance between direct and diffuse radiation reaching the Earth’s surface. Here, using a suite of models describing relevant coupled components of […]

Novel Insights into Selection for Antibiotic Resistance in Complex Microbial Communities

Publication ID: pub.1105777121

Publication date: 24/07/2018

Keywords: Anti-Bacterial Agents; Cefotaxime; Cephalosporin Resistance; Cephalosporinase; Cluster Analysis; DNA, Ribosomal; Global; Metagenomics; Microbiota; Phylogeny; RNA, Ribosomal, 16S; Selection, Genetic; Sequence Analysis, DNA; Sewage

Recent research has demonstrated that selection for antibiotic resistance occurs at very low antibiotic concentrations in single-species experiments, but the relevance of these findings when species are embedded in complex microbial communities is unclear. We show that the strength of selection for naturally occurring resistance alleles in a complex community remains constant from low subinhibitory […]

The legacy of 4,500 years of polyculture agroforestry in the eastern Amazon

Publication ID: pub.1105743411

Publication date: 23/07/2018

Keywords: Agriculture; Brazil; Eastern Amazon; Forestry; Forests; Fossils; History, Ancient; Plants

The legacy of pre-Columbian land use in the Amazonian rainforest is one of the most controversial topics in the social1–10 and natural sciences11,12. Until now, the debate has been limited to discipline-specific studies, based purely on archaeological data8, modern vegetation13, modern ethnographic data3 or a limited integration of archaeological and palaeoecological data12. The lack of integrated studies to connect past […]

Surrogate regression modelling for fast seismogram generation and detection of microseismic events in heterogeneous velocity models

Publication ID: pub.1105685593

Publication date: 19/07/2018

Keywords: Computational Seismology; Joint Inversion; Seismic Noise; Statistical Methods; Statistical Seismology; Time-series Analysis

Simulating the cloudy atmospheres of HD 209458 b and HD 189733 b with the 3D Met Office Unified Model

Publication ID: pub.1101680815

Publication date: 19/07/2018

Keywords: Atmospheres; Gaseous Planets; HD 189733 b; HD 209458 b; Hydrodynamics; Numerical; Planets; Radiative Transfer; Scattering

Aims. To understand and compare the 3D atmospheric structure of HD 209458 b and HD 189733 b, focusing on the formation and distribution of cloud particles, as well as their feedback on the dynamics and thermal profile. Methods. We coupled the 3D Met Office Unified Model (UM), including detailed treatments of atmospheric radiative transfer and […]