WHAT IS BIOLOGICAL DESERT????
These are regions in ocean that contain low phytoplankton biomass or chlorophyl concentration
They are like oceanic desert characterised by nutriant starved saltwater and having least productive ecosystem
THE MAJOR LOCATIONS of BIOLOGICAL DESERT ????
Located on 5 Gyres of major oceans
NOTE : Gyre – These are earth’s system of rotating ocean currents..Centre of this gyre is further away from any continent and productive ocean…This is why this region is called as oceanic desert
Eg:1. South Pacific gyre -( bounded by; North – Equator, West – Autralia, South – Antarctic Circum Polar Current and East – South America)
2.North Atlantic Gyre
3.South Atlantic Gyre
4.Indian ocean Gyre
5.North pacific Gyre
“BIOLOGICAL DESERT CONSTITUTE AROUND 40% OF EARTH’S SURFACE”
IS BIOLOGICAL DESERT A DANGEROUS SIGHN ??????
Recent studies indicate that oceans biological desert have been expanding ..
They are growing much faster than global warming models predict…..
Sea-viewing Wide Field of view Sensors(SeaWiFS) – a satellite that maps ocean colour arounsd the globe provides images of expansion of biological desert ..
Note : All the biological oceans have grown except South Indian Ocean Gyre
-Artificial Fertilisation –
Its the process by which biological deserts can be used to overcome climate change..
Phytoplanktons are made use as they facilitate “Carbon Sequestration”
Damodar river is refered to as manmade biological desert as it is severely polluted….