• Resistant to invasions by alien species is a feature of a stable community.
• It is a group of people who share the same place or live within the same area.
• A group of populations is known as a community.

International Union for Conservation of Nature (IUCN) is working in the field of conservation of nature and sustainable use of natural resources.

• George David Tilman is an American ecologist.
• He performed long-term ecosystem experiments using outdoor plots.
• Through his plots, he provided some tentative answers such as increased diversity contributed to higher productivity.

The materials or substances occurring in nature that exist without the actions of humankind are known as natural resources. The conservation of natural resources is important for the preservation of natural, biological diversity.

The materials or substances (biotic and abiotic) occurring naturally and without the actions of humankind are known as natural resources. The conservation of natural resources is important for the preservation of biological diversity and maintaining ecological processes.

The materials or substances occurring in nature that exist without the actions of humankind are known as natural resources. These resources can be conserved by using them wisely.

International Union for Conservation of Nature (IUCN) was founded on 5 October 1948 in France by Julian Huxley. It is working in the field of conservation of nature and sustainable use of natural resources.

Those species whose number of individuals is greatly reduced to a critical level and are at a high risk of extinction in the wild are known as endangered species. Some examples of endangered species are Brown spider monkey, Bengal tiger, Ganga river dolphin, Indian Rhino, Black buck, etc.

Both domesticated crops and agricultural weeds have arisen from wild plants, but domesticated crops are different, as they are mostly human inventions selected for certain traits through thousands of years. We will first describe the crop domestication process and the evolution of agricultural weeds in general, contrasting “domestication ”with “weediness ”traits acquired during the dedomestication or ferality process, including a review of their genetic basis. Then for a select group of crop plants we will examine the degree of inferred domestication (ratio of domestic acquired to retained weediness traits).

Brazil has the highest biodiversity because it is located near equator.