The WWF and the Zoological Society of London have released a new analysis that shows the earth has lost 50% of its vertebrate wildlife in the last 40 years.
This steep decline of vertebrates was calculated by analysing 10,000 populations of more than 3,000 species. The data was then used to create a ‘Living Planet Index’ (LPI), to reflect the state of all 45,000 known species of vertebrates. And the result is this - in the last 40 years, we have managed to kill 50% of all earth’s known vertebrates. And remember, this analysis didn’t include invertebrates, so the total overall loss could be much, much higher.
The fastest declines are in freshwater ecosystems, where numbers have dropped 75% since 1970. Freshwater rivers often represent the end of a system, where effluent often ends up.
The graph above shows the causes of vertebrate decline based on analysis of 3,430 species’ populations. As it stands, we are cutting down trees for soy, timber, and beef faster than they can grow. We are hunting animals faster than they can reproduce. We are pumping water out of rivers faster than rainfall can replenish them. And we are pumping out carbon faster than can be absorbed (and even then, the absorption of carbon dioxide by oceans is another issue).
David Nussbaum, chief executive of WWF-UK said: “The scale of the destruction highlighted in this report should be a wake-up call for us all. But 2015 – when the countries of the world are due to come together to agree on a new global climate agreement, as well as a set of sustainable development goals – presents us with a unique opportunity to reverse the trends.
“We all – politicians, businesses and people – have an interest, and a responsibility, to act to ensure we protect what we all value: a healthy future for both people and nature.”
Chiunque potrà portare dei fiori di campo, i preferiti da Carla, in ogni parte del fiume.
by James Joyce