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Glossary definitions

The IPBES glossary terms definitions page provides definitions of terms used in IPBES assessments. Some definitions in this online glossary have been edited for consistency. Please refer to the specific assessment glossary for citations/authorities of definitions. 

We invite you to report any errors or omissions to [email protected].

Concept Definition Deliverable(s)
harmonization

The process of bringing something together, and comparing (e.g. models or scenarios) to facilitate compatibility or consistency.

Europe and Central Asia assessment
hazard

A process, phenomenon or human activity that may cause loss of life, injury or other health impacts, property damage, social and economic disruption or environmental degradation. Hazards that this assessment discusses are mostly environmental hazards (chemical, natural and biological hazards), while cognizant that many hazards are socio- natural, in that they are associated with a combination of natural and anthropogenic factors. Natural hazards are predominantly associated with natural processes and phenomena, including geological or geophysical hazards that originate from internal earth processes (earthquakes, volcanic activities, landslides, tsunamis), and hydrometeorological hazards, which are of atmospheric, hydrological or oceanographic origin (tropical cyclones, floods, drought; heatwaves, and storm surges). Biological hazards are of organic origin or conveyed by biological vectors, including pathogenic microorganisms, toxins and bioactive substances. Examples are bacteria, viruses or parasites, as well as venomous wildlife and insects, poisonous plants and mosquitoes carrying disease-causing agents.

Sustainable use assessment
heat island effect

Describes built up areas that are hotter than nearby rural areas. Heat islands can affect communities by increasing summertime peak energy demand, air conditioning costs, air pollution and greenhouse gas emissions, heat-related illness and mortality, and water quality.

Global assessment (1st work programme)
hedgerow

A row of shrubs or trees that forms the boundary of an area such as a garden, field, farm, road or right-of-way.

Americas assessment, Europe and Central Asia assessment
hedonic pricing

An economic valuation approach that utilizes information about the implicit demand for an environmental attribute of marketed commodities.

Europe and Central Asia assessment
herbicide

A substance that kills or inhibits the germination, growth and development of plants. Herbicides may be synthetic chemicals, natural chemicals, or biological agents.

Pollination assessment
holocene

The Holocene is the current geological epoch. It began after the Pleistocene, approximately 11,650 calendar years before present.

Global assessment (1st work programme)
homegarden

Yard areas surrounding a house for vegetable and fruit production and keeping of domestic animals. In many regions homegardens contain wild species utilized as medicinal plants, timber or other uses.

Sustainable use assessment, Global assessment (1st work programme)
homeotherm

Organisms (vertebrates) with a constant and high body temperature, with a high level of energy exchange.

Global assessment (1st work programme)
homogenisation

When used in the ecological sense homogenisation means a decrease in the extent to which communities differ in species composition.

Pollination assessment
homogenisation

When used in the ecological sense homogenisation means a decrease in the extent to which communities differ in species or functional composition.

Sustainable use assessment
homogenisation

When used in the ecological sense homogenization means a decrease in the extent to which communities differ in species composition.

Global assessment (1st work programme), Europe and Central Asia assessment, Land degradation and restoration assessment
honey bee

Any bee that is a member of the genus Apis. They are primarily distinguished by the production and storage of honey and the construction of perennial, colonial nests from wax. Currently, eight species of honey bee are recognized.

Pollination assessment
horticulture

High investment crop production using resources intensively for high value product.

Sustainable use assessment
hotspot of agrobiodiversity

Areas with significantly high levels of agrobiodiversity.

Global assessment (1st work programme)
hotspot of endemism

See 'Biodiversity hotspot'.

Global assessment (1st work programme)
human appropriation of net primary production

The aggregate impact of land use on biomass available each year in ecosystems.

Land degradation and restoration assessment, Europe and Central Asia assessment, Americas assessment
human capital

All the knowledge, talents, skills, abilities, experience, intelligence, training, judgment and wisdom possessed individually and collectively by individuals in a population.

IPBES-IPCC co-sponsored workshop on biodiversity and climate change, Land degradation and restoration assessment, Global assessment (1st work programme)
human history

A general term used to refer to pre-historical and historical periods describing the development of humanity. Different classifications of periods exist reflecting different interpretation of human history.

Global assessment (1st work programme), Sustainable use assessment
human rights

Rights inherent to all human beings, regardless of race, colour, sex, language, religion or other opinion, national or social origin, property, birth or any other status. These rights are interrelated, interdependent and indivisible.

Land degradation and restoration assessment
human rights instruments

Instruments for the protection and promotion of human rights, including general instruments, instruments concerning specific issues, and instruments relating to the protection of particular groups.

Land degradation and restoration assessment
human rights

The inalienable fundamental rights of each and every human being as acknowledged in the United Nations Declaration of Human Rights (United Nations, 1948). Arguments of intragenerational justice basically refer to human rights.

Values assessment
human values

See Values.

Asia-Pacific assessment
human well-being

A state of existence that fulfils various human needs, including material living conditions and quality of life, as well as the ability to pursue one's goals, to thrive, and feel satisfied with one's life (IPCC, 2020). The IPBES definition is consistent with this definition but notes that well-being also includes non-material living conditions and cultural identity. The phrase ‘Good quality of Life' as used in this report (see glossary entry) is intended to be inclusive of both the human well-being definitions given above.

human well-being

See Good Quality of Life.

Asia-Pacific assessment
human well-being

see well-being.

Scenarios and models assessment
human-nature relations

The ways in which people relate to and engage with the natural environment, which are diverse and linked to worldviews, values and attitudes embedded in daily life.

Values assessment
humanistic economics

Humanistic economics intend to show that humankind is perfectly capable of living without the profit motive, and has done so for most of its history. It goes again the tendency to consider the profit motive as self-evident, an idea that underlies many political decisions. See also Behavioural economics.

Land degradation and restoration assessment
humification

Decomposition of organic material followed by a synthesis of humic substances.

Land degradation and restoration assessment
hunting

The capture by humans of wild mammals, birds, and reptiles, whether dead or alive, irrespective of the techniques used to capture them or the reasons to do so.

Global assessment (1st work programme)
hybrid model

See models.

hybrid model

Models that combine correlative and process-based modelling approaches.

Scenarios and models assessment
hydraulic fracturing

An oil and gas well development process that typically involves injecting water, sand, and chemicals under high pressure into a bedrock formation via the well. This process is intended to create new fractures in the rock as well as increase the size, extent, and connectivity of existing fractures. Hydraulic fracturing is a well-stimulation technique used commonly in low-permeability rocks like tight sandstone, shale, and some coal beds to increase oil and/or gas flow to a well from petroleum-bearing rock formations.

Land degradation and restoration assessment
hydrothermal vent

A fissure on the floor of a sea out of which flows water that has been heated by underlying magma. The water can be as hot as 400°C (752°F) and usually contains dissolved minerals that precipitate out of it upon contact with the colder seawater, building a stack of minerals, or chimney. Hydrothermal vents form an ecosystem for microbes and animals, such as tube worms, giant clams, and blind shrimp, that can with stand the hostile environment. The hottest hydrothermal vents are called black smokers because they spew iron and sulfide which combine to form iron mono sulfide, a black compound.

Asia-Pacific assessment
hypoxia

Low dissolved oxygen levels in coastal and oceanic waters (<2mL per liter of water), either naturally occurring or as a result of a degradation (e.g. eutrophication).

Sustainable use assessment, Global assessment (1st work programme)
lag phase

the time between when an alien species arrives in a new area and the onset of the phase of rapid, or exponential, increase. Multiple factors are frequently implicated in the persistence or dissolution of the lag phase in biological invasions, including an initial shortage of suitable sites, the absence or shortage of essential mutualists, inadequate genetic diversity, and reduction in competition or predation (due to other alterations in the resident biota)

Invasive alien species assessment
land abandonment

Land abandonment occurs when a particular land use ceases, and there is no clearly- defined subsequent land use practice. It is often associated with poorly defined ownership and/or land use governance.

Land degradation and restoration assessment
land cover

The physical coverage of land, usually expressed in terms of vegetation cover or lack of it. Related to, but not synonymous with, land use.

Sustainable use assessment
land cover

The observed (bio)physical cover on the earth's surface.

Global assessment (1st work programme), Land degradation and restoration assessment
land cover

The physical coverage of land, usually expressed in terms of vegetation cover or lack of it. Related to, but not synonymous with, land use (Millenium Ecosystem Assessment, 2005).

land cover

The surface cover on the ground, whether vegetation, urban infrastructure, water, bare soil or other. Identifying, delineating and mapping land cover is important for global monitoring studies, resource management, and planning activities. Identification of land cover establishes the baseline from which monitoring activities (change detection) can be performed, and provides the ground cover information for baseline thematic maps.

Asia-Pacific assessment
land degradation

Refers to the many processes that drive the decline or loss in biodiversity, ecosystem functions or their benefits to people and includes the degradation of all terrestrial ecosystems.

Americas assessment, Sustainable use assessment, Africa assessment, Global assessment (1st work programme)
land degradation neutrality

A state whereby the amount of healthy and productive land resources, necessary to support ecosystem services, remains stable or increases within specified temporal and spatial scales.

Land degradation and restoration assessment
land degradation

Refers to the many processes that drive the decline or loss in biodiversity, ecosystem functions or services and includes the degradation of all terrestrial ecosystems.

Asia-Pacific assessment, Land degradation and restoration assessment, Europe and Central Asia assessment, Global assessment (1st work programme)
land grabbing

See ‘Grabbing (of wild species and space)’.

Sustainable use assessment
land grabbing

See ‘Large scale land acquisition'.

land grabbing

The large-scale acquisition of land (especially in developing countries), driven primarily by concerns about food and energy security of high-income countries and often executed by the private sector.

Land degradation and restoration assessment
land sharing and sparing

Concepts used to describe, in general terms, spatial-temporal arrangements of agricultural and non-agricultural areas. Land sharing is a situation where farming practices enable biodiversity to be maintained within agricultural landscapes. Land sparing, also called land separation involves restoring or creating non-farmland habitat in agricultural landscapes at the expense of field-level agricultural production - for example, woodland, natural grassland, wetland, and meadow on arable land. This approach does not necessarily imply high-yield farming of the non-restored, remaining agricultural land. See also 'Conservation agriculture'.

Global assessment (1st work programme)
land sharing

A situation where low-yield farming enables biodiversity to be maintained within agricultural landscapes.

Land degradation and restoration assessment, Americas assessment, Europe and Central Asia assessment
land sparing

Also called Land separation involves restoring or creating non-farmland habitat in agricultural landscapes at the expense of field-level agricultural production - for example, woodland, natural grassland, wetland, and meadow on arable land. This approach does not necessarily imply high- yield farming of the non restored, remaining agricultural land. (From Rey Benayas & Bullock, 2012). See also Conservation agriculture in this Glossary.

Americas assessment