Question

Why do you have the development of zonation of species? How can lakes lose their zones? What effects might this loss of zones generate in the populations living in those lakes?

Answer 1

Zonation of species occurs due to changes in altitude/depth/ soil or water conditions(salinity, flow etc). Due to these parameters environment change occurs which can cater to specific species in specific zones. Donation occurs commonly in marine environment and places where there is difference in tidal waves.

Human infiltration /human poaching and killing/ human waste disposal can lead to loss of zonation ,say in case of India s lagoons( Chilka lake, where shrimp aqualculture has tremendously impacted the diversity of shrimps and affected the life of zonal species ).

The excessive human infiltration has led to changes in terms of soil bed that in turn affects the growth of many species. Biodiversity of that zone declines in such cases due to human encroachment, human predation and pollution .