with daigram write short note on BIO - GEO - CHEMICAL CYCLE
Answers
Answer:
A biogeochemical cycle is one of several natural cycles, in which conserved matter moves through the biotic and abiotic parts of an ecosystem.
Explanation:
In biology, conserved matter refers to the finite amount of matter, in the form of atoms, that is present within the Earth. Since, according to the Law of Conservation of Mass, matter cannot be created or destroyed, all atoms of matter are cycled through Earth’s systems albeit in various forms.
In other words, the Earth only receives energy from the sun, which is given off as heat, whilst all other chemical elements remain within a closed system.
The main chemical elements that are cycled are: carbon (C), hydrogen (H), nitrogen (N), oxygen (O), phosphorous (P) and sulfur (S). These are the building blocks of life, and are used for essential processes, such as metabolism, the formation of amino acids, cell respiration and the building of tissues.
These fundamental elements can be easily remembered with the acronym CHNOPS.
Each of these elements is circulated through the biotic components, which are the living parts of an ecosystem, and the abiotic components, which are the non-living parts.
The abiotic components can be subdivided into three categories: thehydrosphere (water), the atmosphere (air) and the lithosphere(rock).
The biosphere is a term which can be used to describe the system that contains all living organisms, including plants, animals and bacteria, as well as their interactions among and between each other, and their interactions with the Earth’s abiotic systems. The biosphere is sometimes called the ecosphere, and can be defined as the sum of all ecosystems.
Biosphere system
With this knowledge, the words “biogeochemical cycle” can be easily broken down. “Bio-” is the biotic system, “geo-” is the geological component, and “chemical” is the elements which are moved through a “cycle”.
At particular stages of their cycling, any of the elements may be stored and accumulated within a particular place for a long period time (e.g. within a rocky substrate, or in the atmosphere). These places are called “sinks” or “reservoirs”.
A “source” is anything from which an element is output, for example volcanoes give off large amounts of carbon in the form of CO2, while human waste is a source for nitrogen, sulfur and phosphorous.
Examples of Biogeochemical Cycle
The Water Cycle
The biogeochemical cycle of water, or the hydrological cycle describes the way that water (Hydrogen Dioxide or H2O) is circulated and recycled throughout Earth’s systems.
All living organisms, without exception, need water to survive and grow, making it one of the most important substances on Earth. In complex organisms it is used to dissolve vitamins and mineral nutrients. It is then used to transport these substances, as well as hormones, antibodies, oxygen and other substances around and out of the body. It also aids in the enzymatic and chemical reactions required for metabolism, and it is used for temperature regulation.
On a geographical level, the biogeochemical cycle of water is responsible for weather patterns. The temperature, the amount, and the movement of water, have an effect all weather systems. As water in its various forms (vapor, liquid and ice) interacts with its surroundings, it alters the temperature and pressure of the atmosphere, creating wind, rain and currents, and is responsible for changing the structure of earth and rock through weathering.
Although there is no real beginning to the water cycle, 97% of the world’s water is stored within the oceans, so here is a logical place to start.
Water cycle
Of the ocean water, a very small proportion becomes frozen at it reaches the poles, and is stored as ice within glaciers.
Some of the surface water is heated by the sun, and evaporation takes place. In this process, the liquid water is converted into water vapor and is taken up in to the atmosphere. As the water rises, it cools and condensation occurs. This results in the water being stored within the atmosphere in the form of clouds.
As the clouds are moved around the earth’s atmosphere they collide and gr
Answer:
(1)The cyclical flow of nutrients within an ecosystem is called the biogeochemical cycle.
(2) Nutrients, necessary for the growth of organisms are continuously transferred from abiotic to biotic factors and biotic to abiotic factors within an ecosystem.
(3)This cycle operates continuously through the medium of the biosphere formed by the lithosphere, atmosphere and hydrosphere.
(4) The recycling of biological, geological and chemical sources of nutrients in this process is a complex process and depends upon the level of energy transfer in the ecosystem.
