Wildlife Decline

 Biodiversity expert John Mwangi Gicheha says the decline in species population abundance has now been validated by the newly-released Living Planet Report 2022.

“The health of planet earth is well and truly on a sharp decline, and we are not only seeing a decrease in the global population of species but a decline in their genetic diversity and a loss of species climatically determined habitats.”

This is the first ever most comprehensive report on the state of global vertebrate wildlife populations, and it makes a startling revelation: the world’s wildlife populations have declined by 69 percent since 1970.

As a measure of the state of the world’s biological diversity among population trends of vertebrate species from terrestrial, freshwater, and marine habitats, the 2022 Living Planet Index analyzed approximately 32,000 populations of 5,230 species across the world.

By tracking trends in the abundance of mammals, fish, reptiles, birds, and amphibians worldwide since 1970, a disturbing image emerged: one million plants and animals are threatened with extinction.

Worse still, 1-2.5 percent of birds, mammals, amphibians, reptiles, and fish have gone extinct.

Key findings include revelations that monitored freshwater populations are hardest hit as there is an alarming decline of 83 percent in the last 50 years, more than any other species groups.

The decline in freshwater population is mainly caused by habitat loss and barriers to migration routes which account for an estimated half the threat to these populations. Further, only 37 percent of rivers over 1,000 kilometres remain free-flowing in their natural state.

Against this backdrop, the report stresses that the global community is living the consequences of double crises and shows how “interlinked emergencies of human-induced climate change and the loss of biodiversity are threatening the well-being of current and future generations.”

The greatest regional decline in wildlife population is in Latin America and the Caribbean region, whose average population abundance decline is 94 percent.

Africa comes second with a 66 percent fall in its wildlife populations over the past 52 years, and across the board, the poor and marginalized remain highly vulnerable and most affected by the decline.

There was an 18 percent decline in Europe and Central Asia and a 55 percent decline in wildlife populations in the Asia Pacific.

More findings show despite mangroves being unique forests of the sea; they remain at great risk as they continue to be lost to aquaculture, agriculture and coastal development at current rates of 0.13 percent per year.

Mangrove loss is not only a loss of habitat for biodiversity, the report emphasizes, but the loss of ecosystem services for coastal communities.

Further, approximately 50 percent of warm water corals have already been lost. Even worse, a warming of 5 degrees Celsius will lead to a loss of 70 to 90 percent of warm water corals.

Overall, the global abundance of 18 of 31 oceanic sharks and rays declined by 71 percent since 1970. By 2020, three-quarters of sharks and rays were threatened with an elevated risk of extinction. 

Judy Ouya, a government official in Kenya's Ministry of Environment and Forestry said that said consequences could no longer be ignored as they are too severe and frequent. They include loss of lives and economic assets from extreme weather conditions, deepening poverty and, severe food and water insecurity from droughts.

WWF: Global Vertebrate Wildlife Population Has Plummeted | Inter Press Service (ipsnews.net)