Geography

Genetic Diversity Biodiversity is a system in constant evolution, from a viewpoint of species, as well as from viewpoint of an individual organism. Genes are…

Species Diversity Biodiversity is a system in constant evolution, from a viewpoint of species, as well as from the viewpoint of an individual organism. Species…

Ecosystem Diversity Biodiversity is a system in constant evolution, from a viewpoint of species, as well as from viewpoint of an individual organism. The broad…

Ecological balance is a state of dynamic equilibrium within a community of organisms in a habitat or ecosystem. It can happen when the diversity of…

Mineral Cycles on Earth The mineral cycle is a biogeochemical and ecological process that regulates the flow, distribution, and migration of mineral nutrients across the…

Nitrogen Cycle Nitrogen is a major constituent of the atmosphere comprising about seventy-nine percent of the atmospheric gases. It is also an essential constituent of…

Oxygen Cycle Oxygen is the main by-product of photosynthesis. It is involved in the oxidation of carbohydrates with the release of energy, carbon dioxide, and…

Biogeochemical Cycles The sun is the basic source of energy on which all life depends. This energy initiates life processes in the biosphere through photosynthesis,…

Carbon Cycle Carbon is one of the basic elements of all living organisms. All living things are made of carbon. Carbon is also a part…

Water Cycle All living organisms, the atmosphere, and the lithosphere maintain between them a circulation of water in the solid, liquid, or gaseous form referred…