Dictionary > Biogeographic realm

Biogeographic realm

Definition
noun, plural: biological realms
Any of the large spatial regions of the Earth’s land surface with ecosystems sharing similar biological evolutionary history and distributional patterns of terrestrial organisms
Supplement
Biogeographic realms are large spatial regions of the Earth’s land surface. Based on the original proposal of Philip Sclater and Alfred Wallace, the Earth’s land surface is divided into six biogeographic regions: Nearctic region, Palaearctic region, Neotropical region, Ethiopian region, Oriental region, and Australian region. At present, there are about eight realms recognized by the World Wildlife Fund and they are divided according to their ecosystems sharing similar biological evolutionary history and distributional patterns of terrestrial organisms. These eight realms are as follows:

  • Nearctic realm – includes most of North America
  • Palaearctic realm – includes the bulk of Eurasian and North Africa
  • Neotropical realm – includes South America, Central America, and the Caribbean
  • Afrotropic realm – includes Trans-Saharan Africa and Arabia
  • Indomalayan realm – includes the Indian subcontinent, Southeast Asia, and southern China
  • Australasia realm – includes Australia, New Guinea, New Zealand, and neighbouring islands
  • Oceanian realm – includes Polynesia (except New Zealand), Micronesia, and the Fijian Islands
  • Antarctic realm – includes Antarctica

Variant(s):

  • biogeographical realm

Synonym(s):

  • ecozone

See also:


You will also like...

Golgi apparatus (3-D illustration)
Role of Golgi Apparatus & Endoplasmic Reticulum in Protein Synthesis

The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis a..

Birth Control and Contraception
Birth Control and Contraception

Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

A sperm cell fertilizing an ovum
Human Reproduction and Fertilization

For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..

Independent Assortment and Crossing Over
Independent Assortment and Crossing Over

This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..

A chart depicting Mendel's Law of Dominance
Mendel’s Law & Mendelian Genetics

One of Mendel’s law of inheritance is the “law of dominance”. Read this tutorial to know more about this form of i..

squirrel
Animal Water Regulation

Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

Related Articles...

No related articles found

See all Related Topics