Major trends in Biodiversity change.

The biosphere has been transformed because of human actions 
      
Blogs-on-nature

      All ecosystems have been drastically modified. changes in biological diversity have been more Rapid in the past 50 years, then that any times in human history.
   More Land was converted to crop lands in the year 30 years ,after 1950 then in the 150 years between 1700 and 1850. 

  Between 1960 and 2000, Reservoir storage capacity Quadrupled and as a result the amount of water stored behind large dams is estimated to be 3 to 6 times the amount of water flowing through rivers at any one time. 

  some 35% of mangroves have been lost in the last two decades in some of the countries. already 20% of know coral reefs have been destroyed and another 20% degraded in the last several decades. 
 
Blogs-on-nature

   At present, the the fastest changes in in ecosystems are taking place in the developing countries however industrial countries to to experience similar rates of change in the early phases of their industrialisation. according to the Millennium Ecosystem Assessment , most of the Biomes studied, have experienced 20% to 50% conversion to human use. 

temperature and mediterranean forest and temperate grasslands  are the most affected with almost three quarters of these biomes native habitat being converted to cultivated lands.

   In the last 50 years rates of conversion have been highest in tropical and subtropical dry forest. projection by scientist indicate that these rates will continue or accelerate in the future.

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