CLICK HERE - WWF - Living Planet Report 2018: Aiming Higher

"There cannot be a healthy, happy and prosperous future for people" without biodiversity, the report warns.

nbcnews.com - by Rachel Elbaum - October 30, 2018

The population of the planet's vertebrates has dropped an average of 60 percent since 1970, according to a report by the WWF conservation organization.

The most striking decline in vertebrate population was in the tropics in South and Central America, with an 89 percent loss compared to 1970. Freshwater species have also significantly fallen — down 83 percent in that period.

The Living Planet Index, provided by the Zoological Society of London (ZSL) and included in the WWF Living Planet 2018 report, tracked the population of mammals, birds, fish, reptiles and amphibians around the world between 1970 and 2014, the latest year for which data was available.

An aerial view shows a tract of Amazon rain forest that has been cleared by loggers and farmers for agriculture near the city of Santarem, Para State, April 20, 2013. (Nacho Doce/Reuters)

CLICK HERE - STUDY - Science - Has land use pushed terrestrial biodiversity beyond the planetary boundary? A global assessment

washingtonpost.com - by Chris Mooney - July 14, 2016

In an ambitious study that represents the latest merger between big data approaches and the quest to conserve the planet, scientists have found that across a majority of the Earth’s land surface — including some of its most important types of terrain and its most populous regions — the abundance or overall number of animals and plants of different species has fallen below a “safe” level identified by biologists.

The reason is not exactly a surprise — from grasslands to tropical forests, humans are using more and more land for agriculture, to live on, to build roads and infrastructure upon. When we take over, we clear the land or otherwise convert it for our purposes.

University of Cambridge - cam.ac.uk - March 4, 2015

One of the first studies to map the impact of deforestation on biodiversity across entire regions of the Amazon has found a clear ‘threshold’ for forest cover below which species loss becomes more rapid and widespread.    

By measuring the loss of a core tranche of dominant species of large and medium-sized mammals and birds, and using the results as a bellwether, the researchers found that for every 10% of forest loss, one to two major species are wiped out.