Biodiversity connects life on land and in the sea, and the data show pressures that are becoming harder to ignore. Across species groups, the IUCN reports 41,415 threatened with extinction and WWF/ZSL finds monitored wild mammal abundance fell by 52% from 1990 to 2016. Explore key indicators, where impacts are concentrated, and how drivers like habitat loss, overfishing, and climate change shape outcomes—plus what governance and livelihoods depend on.
Key Takeaways
- Approximately 8 million species may exist on Earth, according to a widely cited estimate based on biodiversity modeling.
- IUCN reports 41,415 species are threatened with extinction (mammals, birds, reptiles, amphibians, etc.)—across taxonomic groups in the Red List statistics dashboard.
- Between 1990 and 2016, the global abundance of monitored wild mammal populations declined by 52% (WWF/ZSL analysis cited in Living Planet Report 2020).
- About 44% of terrestrial species monitored show declining trends (WWF/ZSL Living Planet Report synthesis).
- In 2019, 1/3 of global marine fish stocks were overfished or at biologically unsustainable levels (FAO).
- Approximately 15% of bird species are threatened with extinction (IUCN Red List summary statistics).
- Earth observation monitoring shows deforestation slowed in some years after 2015; the UN-FAO reports 10 million ha/year loss during 2015–2020 (baseline for conservation need).
- As of 2024, 20.7% of important sites for biodiversity are protected in some regions (IUCN/UNEP-WCMC reporting via Protected Planet & Key Biodiversity Areas synthesis).
- By 2021, 196 parties to CBD include 195 UN member states plus the Holy See (CBD official parties page).
- Target 18 of the Global Biodiversity Framework aims for incentives, subsidies and policies to be aligned to biodiversity outcomes, with elimination/reform of harmful incentives and increasing positive incentives by 2030 (CBD).
- The global cost of biodiversity loss and ecosystem services degradation has been estimated in the trillions of dollars annually (The Economics of Ecosystems and Biodiversity, TEEB).
- Approximately 1.2–1.4 billion people depend on forests for livelihoods, implying large economic stakes tied to biodiversity (World Bank).
- Since 1950, the Earth has warmed by about 1.0°C, affecting climate-sensitive ecosystems (IPCC AR6).
- CO2 concentration reached 419.3 ppm in 2022 (NOAA).
- Arctic sea ice extent averaged about 4.69 million square kilometers in September 2022, far below earlier decades (NOAA Arctic report).
Biodiversity is declining fast as habitat loss and overuse threaten millions of species and the ecosystems people rely on.
Related reading
01 · Category
Global Trends16 stats
01
Since 1950, the Earth has warmed by about 1.0°C, affecting climate-sensitive ecosystems (IPCC AR6).
02
CO2 concentration reached 419.3 ppm in 2022 (NOAA).
03
Arctic sea ice extent averaged about 4.69 million square kilometers in September 2022, far below earlier decades (NOAA Arctic report).
04
Global mean sea level rose by about 0.12–0.13 meters between 1993 and 2021 (satellite record summarized by NOAA).
05
Coral reef bleaching events have increased in frequency; 2016, 2017, and 2020 involved severe bleaching globally (IPCC/WMO summaries).
06
Global forest area declined by 178 million hectares between 1990 and 2015 (FAO Global Forest Resources Assessment summary).
07
In 2022, the UNEP Emissions Gap Report assessed that current policy is insufficient to limit warming to 1.5°C (climate impacts on biodiversity).
08
Global primary energy consumption is rising; biodiversity impacts occur through land use and emissions (IEA).
09
The global methane concentration reached about 1,915 ppb in 2022 (NOAA).
10
Global N2O concentration reached about 335.1 ppb in 2022 (NOAA).
11
+1.04°C global average temperature change relative to 1850–1900 in 2023
12
+1.02°C global average temperature change relative to 1850–1900 in 2022
13
+0.98°C global average temperature change relative to 1850–1900 in 2020
14
+0.92°C global average temperature change relative to 1850–1900 in 2015
15
+0.82°C global average temperature change relative to 1850–1900 in 2005
16
+0.60°C global average temperature change relative to 1850–1900 in 1970
Interpretation
Global Trends Interpretation
Under the Global Trends lens, the planet’s biodiversity pressures are intensifying as Earth warms by about 1.0°C since 1950, while CO2 rises to 419.3 ppm in 2022 and coral bleaching turns more frequent, with the most severe global events occurring in 2016, 2017, and 2020.
report visual · Projection
Global warming has accelerated since the mid-2000s
Global surface temperature anomaly increased over time, with the latest value highest in 2023 at a +1.04°C leader, widening the gap versus earlier reference points like 1970 (+0.60
0.6 °C relative to 1850–1900
Start
+1.04%
CAGR · 53y
1 °C relative to 1850–1900
Projected
19702023
source-verifiedmetoffice.gov.uk2023
02 · Category
Ecosystem & Species8 stats
01
5,000+ plant species are used in agriculture worldwide, but only 9 crops account for 66% of global crop production — indicates narrowing of crop genetic biodiversity.
02
Over 2,000 freshwater species have been reported as at risk of extinction — reflecting freshwater ecosystem biodiversity vulnerability.
03
About 76% of the world’s land is used in some way by humans — influencing habitat availability and species survival.
04
Marine heatwaves increased in frequency and intensity over recent decades — affecting marine species and ecosystems.
05
Tropical forests still cover about 40% of the world’s land area — key biodiversity reservoirs.
06
A 2020 meta-analysis finds that pollination services can be reduced by 15–30% under scenarios of land-use and habitat loss — supporting a measurable biodiversity-to-economy link.
07
Seagrass meadows are estimated to have declined by 29% worldwide since 1879 — habitat-loss magnitude affecting coastal biodiversity.
08
World wetlands have declined by 35% since 1970 — reflecting habitat loss for water-dependent species.
Interpretation
Ecosystem & Species Interpretation
Across ecosystems and species, human pressures are narrowing biodiversity, with just 9 crops driving 66% of global production and about 2,000 freshwater species reported at risk of extinction, while land use already affects 76% of the world’s area and marine heatwaves intensify impacts on marine life.
03 · Category
Threat Drivers7 stats
01
About 44% of terrestrial species monitored show declining trends (WWF/ZSL Living Planet Report synthesis).
02
In 2019, 1/3 of global marine fish stocks were overfished or at biologically unsustainable levels (FAO).
03
Approximately 15% of bird species are threatened with extinction (IUCN Red List summary statistics).
04
About 1.5 million km² of tropical forest were cleared between 2001 and 2019 (Global Forest Watch/peer-reviewed).
05
Biodiversity in tropical ecosystems is highly sensitive to deforestation; a large fraction of biodiversity resides in forests (peer-reviewed estimates).
06
17% of greenhouse gas emissions are linked to land-use change and forestry (IPCC).
07
The ocean acidification measured by pH has decreased by about 0.1 since the pre-industrial era (NOAA/Ocean Acidification).
Interpretation
Threat Drivers Interpretation
Threat drivers are accelerating biodiversity loss as declining trends affect 44% of monitored terrestrial species and 1/3 of marine fish stocks are already overfished or unsustainable, while deforestation removes about 1.5 million km² of tropical forest from 2001 to 2019 and land use and forestry account for 17% of greenhouse gas emissions.
More related reading
04 · Category
Economic Valuation7 stats
01
Target 18 of the Global Biodiversity Framework aims for incentives, subsidies and policies to be aligned to biodiversity outcomes, with elimination/reform of harmful incentives and increasing positive incentives by 2030 (CBD).
02
The global cost of biodiversity loss and ecosystem services degradation has been estimated in the trillions of dollars annually (The Economics of Ecosystems and Biodiversity, TEEB).
03
Approximately 1.2–1.4 billion people depend on forests for livelihoods, implying large economic stakes tied to biodiversity (World Bank).
04
About 75% of the world’s poor rely directly on natural resources, linking biodiversity to poverty alleviation economics (World Bank).
05
About 30% of global fish stocks are overexploited (FAO).
06
Forestry provides employment to around 13.2 million people globally (FAO).
07
The cost of invasive alien species to the global economy has been estimated at around US$423 billion annually (2019 review commonly cited; Nature/GBF sources).
Interpretation
Economic Valuation Interpretation
Economic valuation of biodiversity is increasingly urgent because biodiversity loss and ecosystem degradation are estimated to cost trillions of dollars each year and with 75% of the world’s poor relying directly on natural resources, aligning incentives and subsidies under Target 18 is critical for both financial risk and poverty reduction.
05 · Category
Species & Populations5 stats
01
Approximately 8 million species may exist on Earth, according to a widely cited estimate based on biodiversity modeling.
02
IUCN reports 41,415 species are threatened with extinction (mammals, birds, reptiles, amphibians, etc.)—across taxonomic groups in the Red List statistics dashboard.
03
Between 1990 and 2016, the global abundance of monitored wild mammal populations declined by 52% (WWF/ZSL analysis cited in Living Planet Report 2020).
04
The median extinction risk of birds and mammals increased in recent decades as habitat quality declined, with global biodiversity impacts reflected in IUCN assessments.
05
WWF/ZSL reported that 58% of monitored vertebrate populations declined between 1970 and 2016 (Living Planet Report 2018).
Interpretation
Species & Populations Interpretation
Under the Species and Populations lens, the crisis is measurable and worsening, with 52% fewer monitored wild mammal individuals since 1990 and 58% of monitored vertebrate populations declining from 1970 to 2016, while 41,415 species are already recorded as threatened with extinction.
06 · Category
Industry Overview12 stats
01
Earth observation monitoring shows deforestation slowed in some years after 2015; the UN-FAO reports 10 million ha/year loss during 2015–2020 (baseline for conservation need).
02
As of 2024, 20.7% of important sites for biodiversity are protected in some regions (IUCN/UNEP-WCMC reporting via Protected Planet & Key Biodiversity Areas synthesis).
03
By 2021, 196 parties to CBD include 195 UN member states plus the Holy See (CBD official parties page).
04
CITES includes 5,600 species of fauna and 33,000 species of flora listed (CITES species page).
05
The IUCN Green List aims to recognize well-managed protected and conserved areas; 10,000+ sites are covered in the Green List scope over time (IUCN Green List statistics).
06
US$44 billion of environmentally related spending is lost annually due to lack of or ineffective biodiversity policies — fiscal leakage estimate.
07
US$5.7 trillion per year in economic value is moderately or highly dependent on nature — economic reliance assessment.
08
US$124–US$242 billion per year is the estimated global funding gap for biodiversity conservation and restoration — financing shortfall range.
09
A 2018 study estimates that invasive alien species cause about US$1.4 trillion in economic damage annually worldwide — global quantification of an invasive-species impact.
10
189 countries have ratified the Convention on International Trade in Endangered Species (CITES) — governance coverage relevant to biodiversity trade regulation.
11
197 parties have ratified the Convention on Biological Diversity (CBD) — policy participation enabling implementation of biodiversity commitments.
12
33% of assessed marine fish stocks are overexploited (i.e., at biologically unsustainable levels) — reflects pressure on aquatic biodiversity.
Interpretation
Industry Overview Interpretation
Under an Industry Overview lens, despite global action such as 196 CBD parties and 10,000-plus sites in the IUCN Green List scope, biodiversity progress remains uneven since deforestation still averaged 10 million hectares per year from 2015 to 2020 and US$44 billion is lost annually from ineffective biodiversity policies.
Reference
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
APA
Felix Zimmermann. (2026, February 13). Biodiversity Statistics. Gitnux. https://gitnux.org/biodiversity-statistics
MLA
Felix Zimmermann. "Biodiversity Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/biodiversity-statistics.
Chicago
Felix Zimmermann. 2026. "Biodiversity Statistics." Gitnux. https://gitnux.org/biodiversity-statistics.
Sources & references
50 datasets cited across this report · attribution is report-level
+26 additional datasets cited (not shown individually)