Ecosystem Articles

• Exotic Species
  Invasive Species
  Nature
  New Species
  Endangered Animals
  Wild Animals
   
  

  Introduced species

  An introduced species (also known as an exotic species) is an organism that is not native to the place or area where it is considered introduced and instead has been accidentally or deliberately ... > more
• Tundra
  Global Warming
  Climate
  Geography
  Forest
  Rainforests
   
  

  Tundra

  In physical geography, tundra is an area where the tree growth is hindered by low temperatures and short growing seasons. There are three types of tundra: Arctic tundra, Antarctic tundra, and alpine ... > more
• Petroleum
  Fossil Fuels
  Energy and Resources
  Energy and the Environment
  Rainforests
  Air Quality
   
  

  Natural gas

  Natural gas, commonly referred to as gas, is a gaseous fossil fuel consisting primarily of methane. It is found in oil fields and natural gas fields, as well as—in smaller quantities—in ... > more
• Water
  Oceanography
  Marine Biology
  Ecosystems
  Fish
  Geography
   
  

  Seawater

  Seawater is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of approximately 3.5%, or 35 parts per thousand. This means that for every 1 litre (1000 mL) of ... > more
• Forest
  Rainforests
  Trees
  Ecology Research
  Nature
  Ecology
   
  

  Forest

  A forest is an area with a high density of trees (or, historically, a wooded area set aside for hunting). These plant communities cover large areas of the globe and function as animal habitats, ... > more
• Geography
  Earth Science
  Earthquakes
  Geology
  Oceanography
  Natural Disasters
   
  

  Mountain

  A mountain is a landform that extends above the surrounding terrain in a limited area. A mountain is generally higher and steeper than a hill, but there is considerable overlap, and usage often ... > more
• Extinction
  Endangered Animals
  Endangered Plants
  New Species
  Nature
  Exotic Species
   
  

  Extinction

  In biology and ecology, extinction is the cessation of existence of a species or group of taxa, reducing biodiversity. The moment of extinction is generally considered to be the death of the last ... > more
• Botany
  Ecology
  Ecology Research
  Marine Biology
  Sea Life
  Nature
   
  

  Phytoplankton

  Phytoplankton refers to the autotrophic component of the plankton that drifts in the water column. Most phytoplankton are too small to be individually seen with the unaided eye. Phytoplankton, like ... > more
• Water
  Ecosystems
  Drought Research
  Floods
  Pollution
  Ecology
   

  Brackish water

  Brackish water is water that is saltier than fresh water, but not as salty as sea water. It may result from mixing of seawater with fresh water, as in estuaries, or it may occur as in brackish fossil ... > more
• Water
  Oceanography
  Landslides
  Global Warming
  Floods
  Environmental Issues
   
  

  Erosion

  Erosion is the displacement of solids (soil, mud, rock and other particles) by the agents of wind, water or ice, by downward or down-slope movement in response to gravity or by living organisms (in ... > more

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