Biodiversity Crisis: Extinction & Conservation
The planet faces a rapid loss of species and ecosystems, driven by human actions, with severe impacts. Conservation efforts aim to protect remaining natural diversity.
Topics: environment, science, politics, individual and values
Example
On 6 May 2019, the UN-backed Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) published its global assessment, written by about 145 experts. It estimated that around 1 million animal and plant species are threatened with extinction, many within decades. It named five main direct causes: changes in land and sea use, direct exploitation of organisms, climate change, pollution and invasive species.
Key facts
- The 2019 IPBES global assessment estimated that around 1 million animal and plant species are threatened with extinction, many within decades.
- IPBES named five main direct drivers: land and sea use change, direct exploitation, climate change, pollution and invasive species.
Limitations
- The 1 million figure is an estimate extrapolated from groups of species that are well studied; it is a scale of risk, not a count of species that will vanish.
Evaluations
environment evaluation
Support
The assessment shows that biodiversity loss is driven mainly by how land and sea are used, not only by climate change, so protecting habitats matters as much as cutting emissions.
Counterargument
Some species have recovered where protected, such as several whale populations after the end of commercial whaling, so decline is not inevitable.
Rebuttal
Local recoveries prove conservation works but are too few to offset losses across ecosystems, which is why the assessment calls for system-wide change.
Additional support
In 2022 countries agreed the Kunming-Montreal framework to protect 30% of land and sea by 2030, a direct policy response to this kind of evidence.
science evaluation
Support
Drawing on about 15,000 sources and around 145 experts, the assessment is the most complete review of nature's condition, giving policymakers a shared evidence base.
Counterargument
Most species have never been assessed, so the global estimate relies on extrapolation from better-known groups such as mammals and amphibians.
Rebuttal
Extrapolation adds uncertainty about the exact number, but every well-studied group points the same way, so the direction of the trend is robust.
Additional support
The report also drew on indigenous and local knowledge, an unusual step that widens what counts as evidence about nature.
politics evaluation
Support
Because the summary was approved by representatives of over 130 governments, it carries political weight that a single study would not.
Counterargument
Earlier global biodiversity targets for 2020 were almost all missed, showing that agreed science does not guarantee action.
Rebuttal
That record argues for binding national plans and finance rather than voluntary goals, which later agreements tried to add.
Additional support
Governments can act on the named drivers directly through land-use planning, fishing limits and trade rules, which makes the assessment useful for policy.
individual and values evaluation
Support
The report frames nature as the basis of food, water and medicine, an argument that biodiversity has value to every person, not only to scientists.
Counterargument
For many families, clearing land or fishing harder is a matter of income now, so asking them to value distant extinction risk can seem unfair.
Rebuttal
This is why conservation works best when it pays local people, through jobs or land rights, rather than only restricting them.
Additional support
Consumer choices such as eating less beef or buying certified timber link individual behaviour to the land-use driver the report names first.
Sources
- UN Environment Programme (2019-05-06): Nature's Dangerous Decline 'Unprecedented'; Species Extinction Rates 'Accelerating'