Glossary
Definitions & Key Concepts
Biodiversity
Biodiversity refers to the variety and variability of life forms within a given ecosystem, biome, or the entire Earth. It encompasses the diversity of species, genetic variation within species, and the range of ecosystems that house these organisms. The variability among living organisms from all sources including terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are a part. This includes variation in genetic, phenotypic, phylogenetic, and functional attributes, as well as changes in abundance and distribution over time and space within and among species, biological communities and ecosystems.
Biodiversity Hotspots
A generic term for an area high in such biodiversity attributes as species richness or endemism. It may also be used in assessments as a precise term applied to geographic areas defined according to two criteria (Myers et al., 2000): (i) containing at least 1,500 species of the world’s 300,000 vascular plant species as endemics, and (ii) being under threat, in having lost 70 % of its primary vegetation.
Biosphere Integrity
“Biosphere Integrity refers to the capacity of ecosystems across the planet to support life and maintain the overall health and stability of the Earth system, [which] depends on the health, diversity, and interactions of the organisms that make up these ecosystems.” (Potsdam Institute for Climate Impact Research, 2025) Biosphere integrity includes the “diversity, extent, and health of living organisms and ecosystems [affecting] the state of the planet [which] co-regulates the energy balance and chemical cycles on Earth. Disrupting biodiversity threatens this co-regulation and dynamic stability.” (Stockholm Resilience Centre, 2025)
Ecosystem
A dynamic complex of plant, animal and micro-organism communities and their non-living environment interacting as a functional unit (Convention on Biological Diversity, 1992).
Ecosystem Integrity
The ability of an ecosystem to support and maintain ecological processes and a diverse community of organisms. It is measured as the degree to which a diverse community of native organisms is maintained, and is used as a proxy for ecological resilience, intended as the capacity of an ecosystem to adapt in the face of stressors, while maintaining the functions of interest (Ocean Health Index, 2018).
Ecosystem Services
The benefits people obtain from ecosystems. According to the original formulation of the Millennium Ecosystem Assessment, ecosystem services were divided into supporting, regulating, provisioning and cultural.
Extinction
A population, species or more inclusive taxonomic group has gone extinct when all its individuals have died. A species may go extinct locally (population extinction), regionally (e.g., extinction of all populations in a country, continent or ocean) or globally. Populations or species reduced to such low numbers that they are no longer of economic or functional importance may be said to have gone economically or functionally extinct, respectively. Species extinctions are typically not documented immediately: for example, the IUCN Red List categories and criteria require there to be no reasonable doubt that all individuals have died, before a species is formally listed as Extinct (see IUCN Red List, 2012b).
Natural Capital
Resources (e.g., plants, animals, air, water, soils, minerals) that combine to yield a flow of benefits to people (UNDP, 2016b). Within the IPBES conceptual framework, it is part of the “nature” category, representing an economic-utilitarian perspective on nature, specifically those aspects of nature that people use (or anticipate to use) as source of NCP.
Nature-based Solutions (NbS)
Nature-based Solutions (NbS) is an umbrella concept for integrated landscape interventions that aim to achieve sustainable outcomes with benefits for both society and biodiversity (Cohen-Shacham et al. 2016; IUCN, 2020 a, b). Also defined as: “Actions to protect, sustainably manage, and restore natural or modified ecosystems, that address societal challenges effectively and adaptively, simultaneously providing human well-being and biodiversity benefits (Cohen-Shacham et al., 2016).
Nature-based Solutions Definition (EU Commission)
The European Commission defines Nature-based solutions (NbS) as: “Solutions that are inspired and supported by nature, which are cost-effective, simultaneously provide environmental, social and economic benefits and help build resilience. Such solutions bring more, and more diverse, nature and natural features and processes into cities, landscapes and seascapes, through locally adapted, resource-efficient and systemic interventions”. Nature-based solutions must therefore benefit biodiversity and support the delivery of a range of ecosystem services. (EU Nature-based Solutions: 2022)
Nature-based Solutions Definition (UNEA)
UNEA resolution 5/5 defines nature-based solutions as “actions to protect, conserve, restore, sustainably use and manage natural or modified terrestrial, freshwater, coastal and marine ecosystems which address social, economic and environmental challenges effectively and adaptively, while simultaneously providing human well-being, ecosystem services, resilience and biodiversity benefits”. The definition goes further to highlight a number of criteria and considerations for the application of NbS, including social and environmental safeguards. (EU Nature-based Solutions: 2022)
Transformative change
Patterns [of biodiversity degradation]are entrenched in societal values and behaviours, and can only be tackled via transformative change: i.e., fundamental, system-wide reorganisation across technological, economic and social factors, including paradigms, goals and values. (EU policies addressing indirect drivers of biodiversity loss.)
Wildlife / Biodiversity Conservation
The management of human interactions with genes, species, and ecosystems so as to provide the maximum benefit to the present generation while maintaining their potential to meet the needs and aspirations of future generations; encompasses elements of saving, studying, and using biodiversity (WRI et al., 1992).
Current State & Trends
6th Mass Extinction / Holocene Extinction
The Holocene is the current geological epoch. It began after the Pleistocene, approximately 11,650 calendar years before present. The Holocene extinction, from 15,000 to 10,000 years ago, is considered the sixth mass extinction event, and the magnitude of species extinction is comparable to that of established prehistoric events such as the Quaternary extinction. The size of living organisms declined dramatically during this event.
Biodiversity Intactness Index (BII)
An indicator of the average abundance of a large and diverse set of organisms in a given geographical area, relative to their reference populations (Scholes & Biggs, 2005). Among the biodiversity metrics, Biodiversity Intactness Index (BII) stands out as a global leader in biodiversity indicators, enabling the quantification of biodiversity loss which informs our understanding of biosphere planetary boundaries. Global biodiversity is rapidly declining, primarily due to agricultural production driven by both domestic and transboundary consumption (Nguyen, C.T., Vačkářová, D. & Weinzettel, J. Consistent global dataset on biodiversity intactness footprint of agricultural production from 2000 to 2020. Sci Data 12, 1613 (2025). https://doi.org/10.1038/s41597-025-05901-0). Global mean magnitude of BII was estimated to be 76 ± 16 % between 2000 and 2020, accompanied by the highly diverse BII variations across geographic regions. (Naiyi Liu, Yunhe Wu, Zihan Liu,Decline in global biodiversity intactness over the past two decades, Science of The Total Environment, Volume 964,2025,178550, https://doi.org/10.1016/j.scitotenv.2025.178550.)
Extinction rate
The rate is a calculation of the number of extinctions per million species per year. In Earth’s geological and biological history (excluding major extinction events like the dinosaurs), the normal extinction rate—what is called the “background extinction rate”—is estimated to be about one species per million per year. The planetary boundary for extinctions set by the Stockholm Resilience Center <10 E/MSY. Many estimates of the current extinction rate vary between 10 and 100+ times greater than the pre-human background rate, while others (the IUCN Red List) affirm the rate is between 1000 and 10,000.
Planetary Boundaries
The planetary boundaries framework highlights the rising risks from human pressure on nine critical global processes that regulate the stability and resilience of the Earth, which includes “biosphere integrity”. Planetary boundaries are quantitative assessments of the safe limits for human pressure on these nine critical processes.
The seven breached planetary boundaries are: Climate Change, Biosphere Integrity, Land System Change, Freshwater Use, Biogeochemical Flows, Novel Entities, and Ocean Acidification (new in 2025). All of these seven boundaries show worsening trends. Only Ozone Depletion and Aerosol Loading remain in the safe zone. (Planetary Health Check, 2025)
Interconnections and implications
Anthropocentric Value
Humanity viewed as the dominant influence. The value that something has for human beings and human purposes (Pascual et al., 2017). The opposite of a non-anthropocentric value, where value is centred on something other than human beings. These values can be non-instrumental or instrumental to non-human ends (IPBES/4/INF/13). https://zenodo.org/records/5657079#.ZEfhZc5ByUm
Biodiversity actions affecting climate
Functioning ecosystems on land and in the oceans absorb a large proportion of man-made CO₂ emissions. Forests, for example, store a significant amount of carbon. However, if forested areas are destroyed through deforestation or succumb to fires, this releases the captured carbon as CO₂, which contributes to an increase in the concentration of greenhouse gases in the atmosphere. Another example is moors and mangrove forests, which normally are carbon sinks. However, if they are degraded or destroyed altogether, they can no longer fulfil this function. This means the integrity and functionality of ecosystems are crucial when it comes to stabilizing the climate.
Climate actions affecting biodiversity
Climate change itself is having a profound negative effect on biodiversity. Rising temperatures, changing precipitation patterns, habitat loss, water scarcity, crop losses, desertification, ocean acidification or an increase in extreme weather events: all these developments are putting pressure on local ecosystems, including the plants and animals that live there. This means that many species are being forced to leave their habitats just to survive or are already on the brink of extinction. ( From myclimate.org)
Direct drivers of biodiversity loss
The direct drivers of biodiversity loss are changes in land- and sea-use, overexploitation, climate change, pollution and invasive alien species. Many activities, such as agriculture, fisheries, urban expansion and trade, contribute to multiple drivers. Addressing the impact of these drivers on biodiversity requires cooperation between different EU policy domains, as well as strong international cooperation because climate change and trade are global issues, and invasive species cross borders.
Examples include:
- Pesticide pollution, which has short-term effects on directly exposed organisms as well as long-term effects on biodiversity from changes in habitat and food chains
- Excessive fertilizer use, which affects biodiversity through eutrophication of water bodies and soil acidification due to nutrient runoff (mainly nitrogen and phosphorus).
- The fisheries industry, which contributes to changes in sea-use and to overexploitation and pollution of marine resources.
See also EU policies address direct drivers of biodiversity loss
Impact of biodiversity loss – on economy
It is estimated that over half of the world’s GDP is dependent on nature. As such, economic stability is closely tied to ecosystem health. The “biodiversity economy” shifts the focus to conserving, restoring and sustainably using biodiversity as a core component of economic development.Unlike traditional approaches that often view nature as an endless resource, the biodiversity economy acknowledges the critical role of Earth’s diverse life forms in supporting human survival and economic prosperity. The approach aims to protect and restore ecosystems while creating economic opportunities that benefit both people and the planet. (UNEP, 2025) Biodiversity enables Nature to be productive, resilient and adaptable. Just as diversity within a portfolio of financial assets reduces risk and uncertainty, so diversity within a portfolio of natural assets increases Nature’s resilience to shocks, reducing the risks to Nature’s services. Reduce biodiversity, and Nature and humanity suffer (The Economics of Biodiversity, The Dasgupta Review, 2021). Biodiversity loss also has profound economic consequences, particularly in sectors like agriculture, fisheries and healthcare. It is estimated that the global economic impact of biodiversity loss amounts to US$ 10 trillion annually, including healthcare costs from increased disease transmission and agricultural losses from pollinator declines. For example, the decline in bee populations, which are responsible for pollinating crops worth over US$ 235 billion annually, threatens global food security and nutrition. (WHO, 2025)
See also Biodiversity and trade 2021 and Biodiversity and finance 2022
Impact of biodiversity loss – on health
People depend on biodiversity in many ways. Human health relies on ecosystem resources, products and services (such as fresh water, food and fuel sources; the regulation of crop pests and diseases; and the regulation of air, water and soil quality) which are needed for good health and productive livelihoods. Biodiversity loss can have significant direct health impacts if ecosystem services no longer meet societal needs. (WHO, 2025)
See also: Biodiversity and health 2023
Indirect drivers of biodiversity loss
The main indirect drivers of biodiversity loss are the unsustainable patterns of production, consumption, resource use and trade underlying the direct drivers [of biodiversity loss]. These patterns are entrenched in societal values and behaviors and can only be tackled via transformative change: i.e., fundamental, system-wide reorganization across technological, economic and social factors, including paradigms, goals and values.
See also EU policies address direct drivers of biodiversity loss
Material NCPs
Material NCPs include, for example, energy provision (e.g., firewood), food and feed, building materials (e.g., wood, stone), labor (e.g., draft animals), companionship (e.g. pets and farm animals). (IPBES, n.d., op.cit.)
Nature’s contributions to people (NCP)
NCPs are all the contributions, both positive and negative, of living nature to people’s quality of life. (Díaz et al., 2018). As such, NCPs refer to “all contributions – beneficial and detrimental – that people, individually or collectively at various scales, derive or endure from nature. (IPBES, Secretariat, Note by Multidisciplinary Expert Panel, n.d., but post-2021)
NbS and sustainability
As interventions that promise to simultaneously address multiple goals and to provide a wide range of environmental, economic and social benefits, nature-based solutions offer significant promise as responses to sustainability challenges that resonate at a local level whilst also addressing global issues. They are also seen to have the potential to offer a transformative approach for meeting sustainability challenges, through delivering processes such that sustainable communities are designed, strategies formulated and initiatives implemented which are inclusive and where their outcomes are transformative not only in environmental terms but also account for issues of social justice. (EU Nature-based Solutions: 2022)
NbS and the EU Biodiversity Strategy for 2030
The EU Biodiversity Strategy for 2030 aims to secure healthy, resilient, biodiversity-rich ecosystems that deliver the range of services essential to the prosperity and well-being of citizens. Nature-based solutions – with healthy and biodiverse ecosystems at their core – are central to achieving the objectives of this strategy and sustainably tackling wider societal, economic and environmental challenges. (EU Nature-based Solutions: 2022)
NbS and Urban Resilience
Nature-based solutions can be a powerful tool for cities dealing with the contemporary sustainability challenges including degradation of natural capital and ecosystem services, vulnerability to climate change and natural disasters, as well as corresponding health and wellbeing issues. NbS have the potential to boost local economies and create business opportunities. (EU Nature-based Solutions: 2022)
NCP regulating services
There are many examples of NCP regulating services such as: air quality, climate, ocean acidification, freshwater coastal water quality and quantity, habitat creation and maintenance, pollination and seed dispersal, soil and sediment formation / protection / decontamination, mitigation of hazards and extreme weather, mitigation of detrimental organisms and biological processes. (IPBES, n.d., op.cit.)
Non-material NCPs
Non-material NCPs include, for example, learning and inspiration, physical and psychological experiences, and supporting identity formation. (IPBES, n.d., op.cit.)
Regulatory Initiatives
The landscape of regulatory and treaty-based initiatives designed to address tensions at the interface of biodiversity and market economics is complex and constantly evolving. Efforts to protect biodiversity began in the environmental movement of the 1960s, expanded in the wake of 1990s globalization, and grew in both ambition and urgency following the 2015 Paris Climate Accord. The 2022 Kunming-Montreal Global Biodiversity Framework constitutes the most significant effort to address global biodiversity loss. With a focus on global and European efforts, this chronological list of key regulatory initiatives provides the legal basis for the protection of nature and biodiversity.
- 1964 IUCN Red List of Threatened Species
- 1973 Convention on International Trade in Endangered Species of Wild Fauna & Flora (CITES)
- 1992 UN Convention on Biological Diversity (CBD)
- 2012 International Panel on Biodiversity and Ecosystem Services (IPBES)
- 2019 European Green Deal
- 2020 EU Biodiversity Strategy 2030
- 2021 EU Strategy on Adaptation to Climate Change
- 2022 Kunming-Montreal Global Biodiversity Framework (GBF)
- 2024 EU Nature Restoration Law (NLR)
- 2024 IPBES Nexus Assessment
Key Sources
The following reports and publications offer reliable, evidence-based information on biodiversity and can support both personal learning and the development of educational materials.
- Planetary Boundaries Framework
- IPBES 2024 Report (IPBES-2024)
- IPBES Global Report-Annex I, Glossary
- IPCC
- EC Knowledge Centre for Biodiversity (EC-2025)
- Asking Better Questions on Nature (TNFD-PRI-Ceres-IIGCC-AIGCC-2025)
- IUCN Global Standard for Nature-based Solutions
- Evaluating the Impact of Nature-Based Solution: A Handbook for Practitioners (EC, 2021) (D2.1, p.8)