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Regulation of nitrogen fixation from free-living organisms in soil and leaf litter of two tropical forests of the Guiana shield

Background and aimsBiological fixation of atmospheric nitrogen (N2) is the main pathway for introducing N into unmanaged ecosystems. While recent estimates suggest that free-living N fixation (FLNF) accounts for the majority of N fixed in mature tropical forests, the controls governing this process are not completely understood. The aim of this study was to quantify FLNF rates...

Landscape-scale assessments of stable carbon isotopes in soil under diverse vegetation classes in East Africa: application of near-infrared spectroscopy

Aims Stable carbon isotopes are important tracers used to understand ecological food web processes and vegetation shifts over time. However, gaps exist in understanding soil and plant processes that influence δ13C values, particularly across smallholder farming systems in sub-Saharan Africa. This study aimed to develop predictive models for δ13C values in soil using near infrared...

Short-term carbon input increases microbial nitrogen demand, but not microbial nitrogen mining, in a set of boreal forest soils

Rising carbon dioxide (CO2) concentrations and temperatures are expected to stimulate plant productivity and ecosystem C sequestration, but these effects require a concurrent increase in N availability for plants. Plants might indirectly promote N availability as they release organic C into the soil (e.g., by root exudation) that can increase microbial soil organic matter (SOM...

A deconvolutional Bayesian mixing model approach for river basin sediment source apportionment

Systems, Sustainable Agriculture Sciences, Rothamsted Research, North Wyke, Okehampton, UK William H. Blake and Pascal Boeckx contributed equally. AffiliationsSchool of Geography, Earth and Environmental ... Scholar Search for Pascal Boeckx in:Nature Research journals • PubMed • Google Scholar Search for Brian C. Stock in:Nature Research journals • PubMed • Google Scholar Search for Hugh G. Smith in:Nature

The electron donating capacity of biochar is dramatically underestimated

University, Coupure Links 653, 9000 Ghent, BelgiumFrederik Ronsse & Inés CidLaboratory of Applied Physical Chemistry, Ghent University, Coupure Links 653, 9000 Ghent, BelgiumInés Cid & Pascal Boeckx ... journals • PubMed • Google ScholarSearch for Pascal Boeckx in:Nature Research journals • PubMed • Google ScholarSearch for Korneel Rabaey in:Nature Research journals • PubMed • Google Scholar Contributions

Spatial Distribution of Carbon Stored in Forests of the Democratic Republic of Congo

National forest inventories in tropical regions are sparse and have large uncertainty in capturing the physiographical variations of forest carbon across landscapes. Here, we produce for the first time the spatial patterns of carbon stored in forests of Democratic Republic of Congo (DRC) by using airborne LiDAR inventory of more than 432,000 ha of forests based on a designed...

Correction: Aboveground vs. Belowground Carbon Stocks in African Tropical Lowland Rainforest: Drivers and Implications

Janvier Lisingo Geert Baert Hans Verbeeck Pascal Boeckx In multiple instances, the unit g kg-1 appears incorrectly. The correct unit in these instances should be mg kg-1. Please see the corrected text and

Aboveground vs. Belowground Carbon Stocks in African Tropical Lowland Rainforest: Drivers and Implications

Background African tropical rainforests are one of the most important hotspots to look for changes in the upcoming decades when it comes to C storage and release. The focus of studying C dynamics in these systems lies traditionally on living aboveground biomass. Belowground soil organic carbon stocks have received little attention and estimates of the size, controls and...

Stratified Community Responses to Methane and Sulfate Supplies in Mud Volcano Deposits: Insights from an In Vitro Experiment

Numerous studies on marine prokaryotic communities have postulated that a process of anaerobic oxidation of methane (AOM) coupled with sulfate reduction (SR) is the main methane sink in the world's oceans. AOM has also been reported in the deep biosphere. But the responses of the primary microbial players in eliciting changes in geochemical environments, specifically in methane...

A robust nitrifying community in a bioreactor at 50 °C opens up the path for thermophilic nitrogen removal

The increasing production of nitrogen-containing fertilizers is crucial to meet the global food demand, yet high losses of reactive nitrogen associated with the food production/consumption chain progressively deteriorate the natural environment. Currently, mesophilic nitrogen-removing microbes eliminate nitrogen from wastewaters. Although thermophilic nitrifiers have been...

Above-ground biomass and structure of 260 African tropical forests

We report above-ground biomass (AGB), basal area, stem density and wood mass density estimates from 260 sample plots (mean size: 1.2 ha) in intact closed-canopy tropical forests across 12 African countries. Mean AGB is 395.7 Mg dry mass ha−1 (95% CI: 14.3), substantially higher than Amazonian values, with the Congo Basin and contiguous forest region attaining AGB values (429 Mg...