Results 131 to 140 of about 13,726 (266)

Evolution and phylogeny of eukaryotic autotrophs: Evolutionary process to generate plants.

open access: yesBiological Sciences in Space, 2005
Eukaryotic autotrophs, generally assembled as plants, are polyphyletic and they appear across at least five super groups of eukaryotes, which indicate that photosynthesis has been horizontally transferred between different lineages of eukaryotes. This situation is explained by secondary endosymbioses that should have occurred between heterotrophic ...
openaire   +2 more sources

Surface‐Atmosphere Carbon Dioxide Exchange and Ecosystem Water Use Efficiency in a Multi‐Functional Perennial Polyculture Agroecosystem

open access: yesJournal of Sustainable Agriculture and Environment, Volume 5, Issue 2, June 2026.
ABSTRACT Perennial polycultures, with a combination of perenniality and vegetation diversity, have carbon mitigation potential and water conservation benefits, via increased plant carbon uptake and improved ecosystem water use efficiency (EWUE). Few studies have assessed the coupled carbon and water balance in perennial polyculture agroecosystems that ...
Ojaswee Shrestha   +4 more
wiley   +1 more source

The effect of nitrate concentration on sulfide-driven autotrophic denitrification in marine sediment

open access: yes, 2011
The effect of nitrate concentration on denitrification rate, microbial community and byproduct accumulation in sulfide-driven autotrophic denitrification, one of the dominant processes during anoxic marine sediment remediation, was investigated in this ...
Shao, MF   +7 more
core   +1 more source

Decoupling Dissolution and Biological Kinetics in Polycaprolactone‐Based Denitrification: Direct Determination of Yield and Maximum Specific Growth Rate

open access: yesWater Environment Research, Volume 98, Issue 6, June 2026.
The graphical abstract compares methanol and presolubilized PCL as external carbon sources in anoxic batch denitrification tests. Although both substrates showed comparable biomass yields, presolubilized PCL supported a higher maximum growth rate than methanol.
Dorsa Barkhordari   +6 more
wiley   +1 more source

Quantification of greenhouse gas emissions in biological wastewater treatment [PDF]

open access: yes, 2014
There is an increasing need to reduce greenhouse gas (GHG) emissions and to identify influencing factors from wastewater treatment plants (WWTPs), particularly process emissions consisting of nitrous oxide (N2O), and methane (CH4) GHG, with global ...
Aboobakar, Amina
core  

Comparison of hydrogen production in microalgae under autotrophic and mixotrophic media

open access: yes, 2017
Hydrogen is an alternative source of energy of considerable interest, because it is environmentally friendly. Biological hydrogen production processes involving green microalgae are of significant interest.
Watsamon Nakkhunthod   +3 more
core   +1 more source

CO2 Release During Soil Rewetting Shapes the Seasonal Carbon Dynamics in South American Temperate Region

open access: yesGeophysical Research Letters
Processes driving the terrestrial carbon fluxes in the South American Temperate (SAT) region are not well understood due to limited availability of in situ and flux tower measurements.
Sanam N. Vardag   +4 more
doaj   +1 more source

Organic Matter Stoichiometry Regulates the Continental Shelf Carbon Pump Efficiency of the Northwest European Shelf Seas

open access: yesGlobal Biogeochemical Cycles, Volume 40, Issue 6, June 2026.
Abstract Variations in the elemental C:N:P ratios of organic matter (OM) influence the coupling of carbon and nutrient cycles in the ocean. In this study, we assess the relevance of OM C:N:P stoichiometry for regional carbon cycling in the northwest European shelf seas (NWES).
K. T. Demir   +7 more
wiley   +1 more source

East‐West Variability in Nitrogen Sources Sustaining Pelagic Food Webs in the Subtropical North Pacific Ocean Revealed by Stable Isotopic Analyses

open access: yesGlobal Biogeochemical Cycles, Volume 40, Issue 6, June 2026.
Abstract Biological N2 fixation sustains pelagic ecosystems in subtropical oligotrophic waters. However, its impact on food webs as a nitrogen source remains poorly understood. Here, we quantified the contribution of diazotroph‐derived nitrogen to grazing food chains in the subtropical North Pacific in summer, where N2 fixation activity varies markedly
Sachiko Horii   +6 more
wiley   +1 more source

Drought alters respired δ13CO2 from autotrophic, but not heterotrophic soil respiration

open access: yes, 2012
Many researchers are interested in the variability of root-respired δ13CO2 as an indication of linkages between belowground plant respiration and canopy processes.
Nickerson, N (15650435)   +4 more
core  

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