Daily Current Affairs – 2020Topic: For Prelims and Mains
Wildlife populations have fallen by more than two-thirds over the last 50 years, according to a Living Planet Report 2020 of the World Wildlife Fund.
There has been a reduction of 68% in the global wildlife population between 1970 and 2016.
The highest biodiversity loss due to land use change:
(1) Europe and Central Asia at 57.9 %;
(2) North America at 52.5 %;
(3) Latin America and Caribbean at 51.2 %;
(4) Africa at 45.9 %;
(5) Asia at 43%.
The sharpest declines have occurred throughout the world’s rivers and lakes, where freshwater wildlife has plummeted by 84% since 1970 — about 4% per year.
75% of the Earth’s ice-free land surface has already been significantly altered.
More than 85% of the area of wetlands has been lost during 1970-2016.
India has 2.4% global land share, about 8% global biodiversity and around 16% global population
However, it has lost 12% of its wild mammals, 19% amphibians and 3% birds over the last five decades.
India’s ecological footprint per person is less than 1.6 global hectares (gha)/person (smaller than that of many large countries). But, its high population size has made the gross footprint significantly high.
Ecological Footprint: It is the amount of the environment necessary to produce the goods and services necessary to support a particular lifestyle.
Changes in how land is used – from pristine forest to cropland or pasture – rank among the greatest threats to biodiversity on land worldwide.
It refers to all the varieties of life that can be found on Earth (plants, animals, fungi and microorganisms) as well as to the communities that they form and the habitats in which they live.
As per the Convention on Biological Diversity (Article 2): Biological Diversity means the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species, between species and of ecosystems.
It can be understood at three levels:
Species diversity refers to the variety of different species (plants, animals, fungi and microorganisms) such as palm trees, elephants or bacteria.
Genetic diversity corresponds to the variety of genes contained in plants, animals, fungi and microorganisms. It occurs within a species as well as between species.
Ecosystem diversity refers to all the different habitats – or places – that exist, like tropical or temperate forests, hot and cold deserts, wetlands, rivers, mountains, coral reefs, etc.
Dark Fiber: Dark Fiber also known as unlit Fiber is an unused optical fiber that has been laid but is not currently being used in fiber-optic communications.