Glossary
Natural vegetation
 
   A plant community that has
 
 
  grown naturally without human aid
 
 
  is called natural vegetation. 
  
  
 
Virgin vegetation
 
  Natural vegetation that has been
 
 
  left undisturbed by humans for a long time
 
 
  is called virgin  vegetation. 
  
  
 
Biodiversity
 
  It is typically referred to as
 
 
  its flora and fauna. 
  
  
 
Flora
 
  Flora refers to the
 
 
  plants of a particular region or period.   
  
  
 
Fauna
 
  Fauna is the collective term for the
 
 
  species of animals in a particular region or period.
  
  
 
Biosphere Reserves
 
  It is a forest area where all types of
 
 
  flora and fauna are preserved in their natural environment, 
 
 
  e.g., Nanda Devi.  
  
   
 
National Parks
 
  They are
 
 
  relatively large areas where one or several ecosystems exist
 
 
  and where plants and animal species, geomorphological sites, and habitats are of special educative and recreative interests, e.g., Jim  Corbett Park.   
  
  
 
Wildlife Sanctuary
 
  It is similar to a national park but is
 
 
  dedicated to protecting wildlife and conserving species,
 
 
  e.g., Gir  Lion
  
  
 
Mangroove forests
 
  The mangrove tidal forests are found in the
 
 
  areas of coasts influenced by tides. Mud and silt get accumulated
 
 
  on such coasts.
  
  
 
Tropical Evergreen Forest
 
  Tropical Evergreen forests are
 
 
  restricted to heavy rainfall areas
 
 
  of the Western Ghats and the island groups of Lakshadweep, Andaman and Nicobar, upper parts of Assam and Tamil Nadu coast. They do best where there is a
 
 
  short dry season and more than 200 cm of rainfall each year.
  
  
 
Tropical Deciduos Forest
 
  They are also
 
 
  called monsoon forests
 
 
  and spread over the region receiving rainfall between 200 cm and 70 cm.Trees of this forest type
 
 
  shed their leaves for about six to eight weeks in dry summer.
 
 
  These forests are further
 
 
  divided into moist and dry deciduous.
  
  
 
Montane Forest
In mountainous areas, the decrease in temperature with increasing altitud e leads to the corresponding change in natural vegetation. The wet temperate type of forests is found between a height of 1000 and 2000 meters.