As human populations and consumption increase, we place greater demands on ecosystems that are essential for the survival of not only humanity but wildlife species as well.
The threats facing the rich array of plant and animal life on the planet seem greater than at any time in modern history. Problems such as climate change, water shortages, overharvesting, invasive species, pollution, and habitat disruption—symptoms of human pressure on the planet’s finite resources—are driving down wildlife populations worldwide.
In 2002, under the auspices of the Convention on Biological Diversity (CBD) the leaders of the world’s governments committed to significantly halting the rate of biodiversity loss by 2010. They adopted a suite of indicators, brought together as the Biodiversity Indicators Partnership (BIP), to provide information on biodiversity trends and assess progress toward their target. Global Footprint Network is a Biodiversity Indicators Partnership Key Indicator Partner, and the Ecological Footprint has been officially adopted by the CBD to be included among its biodiversity indicators. It is also a core indicator of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES). The Dasgupta Review (2021) also heavily relied on the Ecological Footprint metric.
What can the Footprint tell us about biodiversity?
Our Ecological Footprint accounts show that humanity currently demands 56% more from our planet than its ecosystems can regenerate (2020). But to secure 85% of the world’s biodiversity, requires humanity not to use more than half of the Earth, according to Harvard biologist E.O. Wilson. In other words, human demand now exceeds 3-fold a rate that is compatible with lasting conservation, including stabilizing our climate.
The gap between human demand and what our planet can regenerate (biocapacity) is known as ecological overshoot. It results in the depletion of the natural capital that all species (including our own) depend on for their livelihood. It also results in the accumulation of greenhouse gases in the atmosphere that leads to climate change, with profound implications for ecosystems and the species they support as well as for our societies well being and economic stability.
Compared to what our planet can regenerate, humanity’s Ecological Footprint has grown 140 percent since 1961. The growing ecological deficit, leading to a burgeoning ecological debt, puts ever more pressure on the resources wild species need to thrive. Therefore, it should not come as a surprise that the average population size of vertebrate species has declined by 68 percent from 1970-2016.
Looking at the various consumption sectors that go into the Ecological Footprint can provide us with a glimpse of the human activities that are drivers of biodiversity loss. (Click here for a chart illustrating how various consumption sectors contribute to habitat loss, overexploitation, pollution, climate change and other key biodiversity threats.)
Meeting the Biodiversity Challenge
A 2010 report in the journal Scienceto which Global Footprint Network was a contributor provided a stark assessment that the world’s governments had not met the target set by the Convention on Biological Diversity, and had instead presided over enormous declines.
In October 2010, the parties to the CBD met in Nagoya, Japan to decide whether to adopt a new biodiversity target and new indicators for the post-2010 era. At the conference, the Biodiversity Indicators Partnership presented a list of strategic goals, including means, milestones and indicators, for achieving the goals set forth in the CBD. Click here to download the full list of BIP recommendations.
Ultimately halting species loss and enabling biodiversity to thrive will require bringing human demand for ecological services into balance with what nature can renewably supply.
By advocating for decision-making that takes the biosphere’s limited resource budget into account, Global Footprint Network is promoting a world where all, including other species, can thrive within the means of our planet. The Network makes accessible to decision-makers, of households, companies, cities and countries, the risks that resource limitation and declining biodiversity pose to them as well as to our societies’ well-being and economic stability.
IPBES adopts Ecological Footprint as a Core Indicator
The Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), an independent intergovernmental body established in 2012, has added Ecological Footprint and biocapacity metrics to its list of Core Indicators. Using Footprint data, IPBES recognizes as a scientifically “well established” trend that countries with an ecological deficit put tremendous pressure on resource security and biodiversity outside of their borders.
Every two years, Global Footprint Network, WWF, and the Zoological Society of London publish the Living Planet Report, the world’s leading science-based analysis on the health of our planet and wildlife populations and the impact of human activity. Global Footprint Network has collaborated with WWF on the biennial Living Planet Report since 2000.