Editing IPCC:AR6/WGII/Chapter-16 (section)

==== 16.1.4.2 Biodiversity and Ecosystems ====

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Rapidly accelerating trends in human impacts on global ecosystems and biodiversity, especially in the past five decades, have resulted in precipitous declines in the numbers of many wild species on land and in the ocean, transformation of the terrestrial land surface for agricultural production, and the pervasive spread of alien and invasive species ( [[#IPBES--2019|IPBES, 2019]] ). As a result, the capacity of ecosystems to support human society is thought to be coming under threat. For instance, the fraction of all primary production being appropriated for human use has doubled over the course of the 20th century (to about 25% in 2005), although it has grown at a slower rate than human population ( [[#Krausmann--2013|Krausmann et al., 2013]] ). Future projections significantly depend on bioenergy production, signalling one of the feedbacks between responses to climate change and climate risks.

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