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A model using marginal efficiency of investment to analyze carbon and nitrogen interactions in terrestrial ecosystems (ACONITE Version 1)
marginal effi ciency investment to analyze carbon
2014/12/19
Carbon (C) and nitrogen (N) cycles are coupled
in terrestrial ecosystems through multiple processes including photosynthesis, tissue allocation, respiration, N fixation,
N uptake, and decompos...
Using multi-model averaging to improve the reliability of catchment scale nitrogen predictions
multi-model averaging catchment scale nitrogen predictions
2014/12/17
Hydro-biogeochemical models are used to foresee the impact of mitigation measures on water quality. Usually, scenario-based studies rely on single model applications. This is done in spite of the wide...
A semi-analytical solution to accelerate spin-up of a coupled carbon and nitrogen land model to steady state
The spin model The steady state coupling Ecosystems Carbon transfer
2014/12/10
The spin-up of land models to steady state of coupled carbon–nitrogen processes is computationally so costly that it becomes a bottleneck issue for global analysis. In this study, we introduced a semi...
Carbon-nitrogen feedbacks in the UVic ESCM
Climate model of the terrestrial nitrogen cycle the earth system terrestrial carbon pool and soil rubbish leaf stem root ammonium and nitrate nitrogen
2014/12/10
A representation of the terrestrial nitrogen cycle is introduced into the UVic Earth System Climate Model (UVic ESCM). The UVic ESCM now contains five terrestrial carbon pools and seven terrestrial ni...
Chronic nitrogen addition causes a reduction in soil carbon dioxide efflux during the high stem-growth period in a tropical montane forest but no response from a tropical lowland forest on a decadal time scale
Chronic nitrogen addition soil carbon dioxide efflux the high stem-growth period a tropical montane forest a tropical lowland forest
2010/1/21
Atmospheric nitrogen (N) deposition is rapidly increasing in tropical regions. We studied the response of soil carbon dioxide (CO2) efflux to long-term experimental N addition (125 kg N ha−1 yr&...
Unusually negative nitrogen isotopic compositions (δ15N) of mangroves and lichens in an oligotrophic,microbially-influenced ecosystem
negative nitrogen isotopic compositions mangroves lichens microbially-influenced ecosystem
2010/1/18
Extremes in δ15N values in mangrove tissues and lichens (range =+4 to −22‰) were measured from a mangrove forest ecosystem located on Twin Cays, offshore islands in Belize, Central America. The ...
Organic matter sedimentation in the western Barents Sea region:Terrestrial and marine contribution based on isotopic composition and organic nitrogen content
Organic matter sedimentation western Barents Sea region Terrestrial and marine contribution
2009/12/2
Here, we present bulk organic geochemical data from a spatial grid of surface samples from the western Barents Sea region. The results show that the distribution of organic carbon in surface sediments...
Patterns of dissolved organic carbon and nitrogen fluxes in deciduous and coniferous forests under historic high nitrogen deposition
dissolved organic carbon nitrogen fluxes deciduous and coniferous forests historic high nitrogen deposition
2010/1/21
Numerous recent studies have indicated that dissolved organic carbon (DOC) and nitrogen (DON) play an important role in C and N cycling in natural ecosystems, and have shown that N deposition alters t...
Nitrogen uptake and regeneration pathways in the equatorial Pacific:a basin scale modeling study
Nitrogen uptake regeneration pathways equatorial Pacific basin scale modeling
2010/1/21
It is well known that most primary production is fueled by regenerated nitrogen in the open ocean. Therefore, studying the nitrogen cycle by focusing on uptake and regeneration pathways would advance ...
Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks:results from an atmosphere-ocean general circulation model
Carbon-nitrogen interactions climate-carbon cycle feedbacks atmosphere-ocean general circulation model
2010/1/21
Inclusion of fundamental ecological interactions between carbon and nitrogen cycles in the land component of an atmosphere-ocean general circulation model (AOGCM) leads to decreased carbon uptake asso...
Influence of elevated CO2 concentrations on cell division and nitrogen fixation rates in the bloom-forming cyanobacterium Nodularia spumigena
elevated CO2 concentrations cell division nitrogen fixation rates bloom-forming cyanobacterium
2010/1/21
The surface ocean absorbs large quantities of the CO2 emitted to the atmosphere from human activities. As this CO2 dissolves in seawater, it reacts to form carbonic acid. While this phenomenon, called...
Interactions among vegetation and ozone,water and nitrogen fluxes in a coastal Mediterranean maquis ecosystem
Interactions vegetation ozone water nitrogen fluxes maquis ecosystem
2010/1/20
Ozone, water and energy fluxes were measured over a Mediterranean maquis ecosystem from 5 May until 31 July 2007 by means of the eddy covariance technique. Additional measurements of NOx fluxes were p...
Mercury concentrations and pools in four Sierra Nevada forest sites,and relationships to organic carbon and nitrogen
Mercury concentrations pools Sierra Nevada forest sites organic carbon nitrogen
2010/1/20
This study presents data on mercury (Hg) concentrations, stochiometric relations to carbon (C) and nitrogen (N), and Hg pool sizes in four Sierra Nevada forest sites of similar exposure and precipitat...
Temporal variability in bioassays of the stomatal ammonia compensation point in relation to plant and soil nitrogen parameters in intensively managed grassland
Temporal variability stomatal ammonia compensation point plant and soil nitrogen parameters
2010/1/19
The exchange of ammonia between crop canopies and the atmosphere depends on a range of plant parameters and climatic conditions. However, little is known about effects of management factors. We have h...
Spatial and temporal variations in dissolved and particulate organic nitrogen in the equatorial Pacific:biological and physical influences
Spatial and temporal variations organic nitrogen equatorial Pacific
2010/1/18
To quote Libby and Wheeler (1997), "we have only a cursory knowledge of the distributions of dissolved and particulate organic nitrogen" in the equatorial Pacific. A decade later, we are still in need...