Sentences with phrase «nitrogen cycling using»

The new study, by researchers at the University of Vienna and the International Institute of Applied System Analysis explores the role of microbial cheaters for soil carbon and nitrogen cycling using a computer model.

Not exact matches

Specifically, Blomqvist and his colleagues argue that six of the 10 boundaries — land use, biodiversity, nitrogen cycle, freshwater use, aerosol and chemical pollution — do not have a hard limit at planet - scale physical thresholds that, if transgressed, would tip them into functioning differently.

They identified 10 environmental limits we might not want to transgress in the Anthropocene: aerosol pollution; biodiversity loss; chemical pollution; climate change; freshwater use; changes in land use (forests to fields, for example); nitrogen and phosphorus cycles; ocean acidity; and the ozone hole.

Using sediment gathered from the ocean floor in different areas of the world, the researchers were able to confirm that as the ice sheets started melting and the climate warmed up at the end of the last ice age, 18,000 years ago, the marine nitrogen cycle started to accelerate.

By using a combination of crop growth, hydrological, carbon and nitrogen cycle models, researchers found that the estimated land suitable for bioenergy grasses — particularly Miscanthus, the most productive bioenergy crop — is limited, despite its relatively high biomass productivity and low water consumption per unit of ethanol.

«A teacher might ask me if I can send some student - friendly lessons about the nitrogen cycle in the next packet, and I use the resources I have here to make that happen,» Fonte says.

These words are: ECOLOGY, BIOSPHERE, BIOTIC FATORS, ABIOTIC FACTORS, POPULATION, BIOLOGICAL COMMUNITY, BIOME, ORGANISM, HABITAT, NICHE, SYMBIOSIS, PREDATION, MUTUALISM, COMMENSALISM, PARASITISM, AUTOTROPH, HETEROTROPH, HERBIVORE, CARNIVORE, OMNIVORE, DETRITIVORES, TROPHIC LEVEL, FOOD CHAIN, FOOD WEB, BIOMASS, MATTER, NUTRIENT BIOCHEMICAL CYCLE, NITROGEN FIXATION, DENITRIFICATION, COMMUNITY, LIMITING FACTOR, TOLERANCE, ECOLOGICAL SUCCESSION, PRIMARY SUCCESSION, CLIMAX COMMUNITY, SECONDARY SUCCESSION, TUNDRA, CLIMATE, LATITUDE, WEATHER, BOREAL FOREST, TEMPERATE FOREST, WOODLANDS, GRASSLAND, DESERT, TROPICAL SAVANNA, TROPICAL SEASONAL FOREST, TROPICAL RAIN FOREST, SEDIMENT, LITTORAL ZONE, PROFUNDAL ZONE, PLANKTON, WETLANDS, ESTUARY, NTERTIDAL ZONE, PHOTIC ZONE, APHOTIC ZONE, BENTHIC ZONE, ABYSSAL ZONE, POPULATION DENSITY, DISPERSION, DENSITY - INDEPENDENT FACTOR, DENSITY - DEPENDENTLY FACTOR, POPULATION GROWTH RATE, EMIGRATION, IMMIGRATION, CARRYING CAPACITY, DEMOGRAPHIC TRANSISTIONS, ZERO POPULATION GROWTH, AGE STRUTURE, EXTINCTION, BIODIVERSITY, GENETIC DIVERSITY, SPECIES DIVERSITY, ECOSYSTEM DIVERSITY, BACKGROUND EXTINCTION, MASS EXTINCTION, NATURAL RESOURCES, OVER EXPLOITATION, HABITAT FRAGMENTATION, BIOLOGICAL MAGNIFICATION, EUTROPHICATION, INTRODUCED SPECIES, RENEWABLE RESOURCES, NONRENEWABLE RESOURCES, NONRENEWABLE RESOURCES, SUSTAINABLE USE, ENDEMIC, BIOLOGICAL AUGMENTATION, BIOREMEDIATION, PRODUCER, CONSUMER, FUNDAMENTAL NICHE, PIONEER SPECIES, REALIZED NICHE, LIMITING FACTOR, PREY, ENERGY PHYRAMIND, PRIMARY CONSUMER, SECONDARY CONSUMER, HOST, GREEN HOUSE EFFECT, POLAR ZONE, TROPICAL ZONE, CANOPY, DECIDUOU, CONIFEROUS, HUMUS

One should also pay attention to other greenhouse gases, particularly methane (from rice paddies, ruminant animal digestive processes, industrial processes, and distributed natural sources, some of which could be triggered to large releases by warming) and nitrous oxide (from the nitrogen cycle linking the atmosphere, plants, and bacteria, now exacerbated by extremely heavy use of nitrogenous fertilizers in agriculture; note, as does Vaclav Smil from the University of Manitoba, that fertilizer use is required to feed half the world's current population.

It is rapidly expanding energy use, mainly driven by fossil fuels, that explains why humanity is on the verge of breaching planetary sustainability boundaries through global warming, biodiversity loss, and disturbance of the nitrogen - cycle balance and other measures of the sustainability of the earth's ecosystem.

In 2014, researchers at the National Oceanic and Atmospheric Administration found that the increased use of natural gas combined cycles in power generation has led to 40 percent less nitrogen oxide emissions and 44 percent less sulfur oxides emissions since 1997.

You'll see that the limits that most concern the biogeochemists are not the limits of drilling and mining (what we used to call «non-renewable resources») but rather the limits that are tied to overall system dynamics — the carbon and nitrogen cycles, biodiversity loss, and so on.

This represents the first estimation of EPP - NOx contributions to the stratospheric odd nitrogen budget using observations over an entire solar cycle.

But the precise effect of pine bark beetle plagues on the nitrogen cycle and carbon cycle is highly variable, says a research group led by the University of Idaho, who have used an ecosystem model to simulate outbreaks.

But pollution also covers hundreds of chemicals which are fine or even beneficial at low levels but which if released in large quantities or in problematic circumstances cause «harm» — like phosphorus (grows your veges but also leads to toxic cyanobacterial blooms which kill cattle), nitrogen (grows crops kills many native species of plants and promotes weed growth costing farmers), copper (used as an oxygen carrier by gastropods but in high concentrations kills the life in sediments which feed fish), hormones like oestrogen (essential for regulating bodies but in high concentrations confuse reproductive cycles especially with marine life) or maybe molasses from a sugar mill (good for rum but when dumped into east coast estuaries used to cause oxygen sag in estuaries leading to massive fish kills).

Dr Lenton (who is also one of the creators of the planetary - boundaries concept) and Dr Watson suggest that energy might be used to change the hydrologic cycle with massive desalination equipment, or to speed up the carbon cycle by drawing down atmospheric carbon dioxide, or to drive new recycling systems devoted to tin and copper and the many other metals as vital to industrial life as carbon and nitrogen are to living tissue.

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Smith says that the observed increase in nitrogen emissions from fertilizer is nearly double the value used in biofuel life - cycle assessments.

Human use of biomass for food, feed, fiber, fuel, and materials has become a primary component of global biogeochemical cycles of carbon, nitrogen, phosphorous, and other nutrients.

Lamarque, J. - F., J.T. Kiehl, G.P. Brasseur, T. Butler, P. Cameron - Smith, W.D. Collins, W.J. Collins, C. Granier, D. Hauglustaine, P.G. Hess, E.A. Holland, L. Horowitz, M.G. Lawrence, D. McKenna, P. Merilees, M.J. Prather, P.J. Rasch, D. Rotman, D. Shindell, and P. Thornton, 2005: Assessing future nitrogen deposition and carbon cycle feedback using a multimodel approach: Analysis of nitrogen deposition.

«Then the bug pulls nitrogen from the air and uses the bioplastic, which is basically stored hydrogen, to drive the fixation cycle to make ammonia for fertilizing crops.»