Impacts of pesticides/chemicals on biodiversity, a developing country's view

Expansion of industrialism and occurrence of two World wars in 20th century was the main motivation for man to examine his/ her greed for better killing agents which resulted in unbelieving numbers and types of chemical agents to destroy the mankind, nature and biodiversity. Some dangerous properties of organochlorine compounds including Persistent Organic Pollutants and their metabolites like long persistency, bioaccumulation, sequestration, biomagnifications and in general talking their incompatibility with nature and life resulted in extinction of some important top carnivore species due to their inability to hold an offspring cohort, even in protected areas. Many of protected wetlands in developing World, mainly in Asian countries are closely connected to rice paddy waters. Rice paddy waters have been under most pesticide and chemical fertilizers pressure for many years and most of these insecticides and fertilizers and their metabolites finally go to wetlands due to high level of ground waters in these areas and also because of stream connections. This situation resulted in fast disappearing of different fish species, beneficial predatory insect species, frogs, snakes and many other vital parts of these ecosystems. Now pesticides/ chemicals residues and their metabolites are found in all corners of this planet in all habitats and niches and some top carnivore species like eagles, sea birds and sea mammals are already extinct due to these pesticides/ chemicals pollution. Entering of pesticides and chemical fertilizers in natural ponds and wetlands now created a disastrous eutrophication load in most of Asian countries changing the wetlands to lagoons.