First type of biogeochemical cycle is nitrogen cycle. Nitrogen is abundant and chemically inert gases, constitutes of about 78% of the atmosphere. According to Stevenson and Cole (1999), accumulation in soil happens through microbial fixation of nitrogen in the presence of ammonia, nitrate and nitrite; depletion exists in the process of crop removal, leaching and volatilization. In term of that, the process of releasing compound during decomposition is called mineralization. Mineralization process is carried out by the microorganisms in which it releases carbon, and also ammonium (Sprent, 1987). As a result, many kinds of organic reduce nitrogen present, like urea, organic bases, such as purines and pyrimidines, and amino compounds. Animals have nitrogenous wastes and will eventually produce lots of nitrogen (Sprent, 1987). Several pathways are illustrated throughout the nitrogen cycle, such as nitrogen fixation, ammonification, nitrification and denitrification. Gates (1921) stated that the process of converted gaseous nitrogen into ammonia or ammonium is nitrogen fixation, while ammonium can also be produced through the decaying of nitrogenous organic substance, which is called ammonification. Afte...
Most of the Earth’s atmosphere is nitrogen (78%). When humans and all living things take a deep breath, most of what they just inhaled is nitrogen. All life needs nitrogen compounds, for examples are proteins and nucleic acids. For the plants, chlorophyll molecules use most of the nitrogen which are important for photosynthesis and further development. The quantity of nitrogen gas being permanently at any given time by natural processes produces only a small increase by fixed nitrogen that rotates among the living and non-living components of the Earth’s ecosystem (Peter et al., 1997). Nitrogen cycle is the process where nitrogen is switched between its various chemical forms. The vital processes of nitrogen cycle are nitrogen fixation, nitrification, ammonification, assimilation and denitrification (Steven & Steven, 2004).
There 's lot of nitrogen in air – about 78% of the air is nitrogen. Because nitrogen is so unreactive, it cannot be used directly by plants to make protein. Only nitrates are useful to plants, so we are dependent on other processes to convert nitrogen to nitrates in the
Eutrophication is “the process by which a body of water acquires a high concentration of nutrients, especially phosphates and nitrates. These typically promote excessive growth of algae. As the algae die and decompose, high levels of organic matter and the decomposing organisms deplete the water available oxygen, cause the death of other organisms, such as fish. Eutrophication is a natu...
In life we heard a lot about Nitrogen Gas. It is chemical element with seven of atomic number and it is makes up about 78% of the earth's atmosphere. It included an estimated about 4,000 trillion tons of the gas. In 1772, Nitrogen had discovered by Doctor Daniel Rutherford. He called this gas "fixed air". He started his research on carbon dioxide. In 1786, Antoine Laurent de Lavoisier who was isolated nitrogen. He pointed out that this gas did not combine with any other chemical element. Also, Carl Wilhelm Scheele and Joseph Priestley were studied this gas. The last one was the chemist Jean-Antoine Chaptal in 1832 who Was suggested Latin term nitrogenium from the Greek nitro. It was appointed the N later in 19th century. Plants produce proteins composite nitrogenous easy dissolved in the soil. Some nitrogen dissolved in the soil comes from the atmosphere to form nitric acid, reacts nitrogen with oxygen in the event of lightning component of numerous compounds known as oxides of nitrogen, which in turn react with water consisting of nitric acid, which endured rain to the soil. In that case, nitrogen gas is one of important element for the organisms. It is approximately 4/5 of the earth's atmosphere.
Pollution comes in various forms. Whether it’s toxic waste, CFC’s, or sewage, they are all hazardous, to the earth. These can deplete the earth and it’s inhabitants of resources, causing a harmful change. A product of pollution is acid rain. We shall see that acidification is harmful to all forms of life.
Because of farm fertilizer, an excess quantity of nitrogen and phosphorus can be wash down becoming runoff into rivers. From this, marine algal blooms cause the water to turn green from the chlorophyll (Reed, 2011). Eutrophication then becomes a dilemma in the system causing either an increase of primary production or an expansion of algae. An enormous expansion of phytoplankton on the water’s surface is then established. At the same time the water column is also stratified, meaning things such as the temperature and salinity are not sync from top to bottom. The seasonal warm surface water has a low density forming a saltier layer above while the cooler and more dense water masses near the bottom layer is isolated from the top cutting off oxygen supply from the atmosphere (Overview, 2008).
Water: Water is the most important aspect of life on Earth, whether it be for us humans or microbes. Alcamo’s Microbes and Society states that the “microbial cytoplasm is water based”. From this we can see that water absolutely must be present for the microbe to continue its life. Microbes also depend on water to dissolve essential substances that they need to survive.