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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)
timber line

The altitude (in mountains) and latitude above which trees are unable to grow - also called tree line (Lawrence, 2005).

Global assessment (1st work programme)
tipping point

A set of conditions of an ecological or social system where further perturbation will cause rapid change and prevent the system from returning to its former state.

Africa assessment, Asia-Pacific assessment, Land degradation and restoration assessment, Americas assessment, Global assessment (1st work programme), Europe and Central Asia assessment, Sustainable use assessment
tipping point

A level of change in system properties beyond which a system reorganizes, often abruptly, and does not return to the initial state even if the drivers of the change are abated.

IPBES-IPCC co-sponsored workshop on biodiversity and climate change
top down

Systems driven by top level or higher- order processes.

Asia-Pacific assessment
topsoil

The upper part of a natural soil that is generally dark coloured and has a higher content of organic matter and nutrients when compared to the (mineral) horizons below. It excludes the litter layer.

Land degradation and restoration assessment
total allowable catch

The total catch allowed to be taken from a resource within a specified time period (usually a year) by all operators; designated by the regulatory authority. Usually allocated in the form of quotas (IUCN, 2012a).

Global assessment (1st work programme)
total allowable catch

The total catch allowed to be taken from a resource within a specified time period (usually a year) by all operators; designated by the regulatory authority. Usually allocated in the form of quotas.

Sustainable use assessment
total economic value

A concept in cost-benefit analysis that refers to the value derived by people from a natural resource, a man-made heritage resource or an infrastructure system, compared to not having it.

Asia-Pacific assessment
totemism

A principle or an ontology found within societies that differentiate different sections of the society, according to the attachment of these sections to animal or plant tutelar spirits. In other words, totemism defines discontinuities in social order according to each group's attachment to a specific animal or plant spirit that is perceived as having similar features to this section (or clan) and an innerself that also ressembles people in this section (and reciprocally).

Global assessment (1st work programme)
totemism

A principle or an ontology found within societies that differentiate different sections of the society, according to the attachment of these sections to animal or plant tutelar spirits. In other words, totemism defines discontinuities in social order according to each group's attachment to a specific animal or plant spirit that is perceived as having similar features to this section (or clan) and an inner-self that also resembles people in this section (and reciprocally).

Sustainable use assessment
trade (formal or informal)

Trade is defined in formal markets as the exchanges in which records are kept and statistics generated. It is expected that currency is the medium of exchange in formal markets. Trade in informal markets encompasses exchanges in which neither records nor statistics are generated; the medium of exchange may be currency or goods and/or services.

Sustainable use assessment
trade-off

A trade-off is a situation where an improvement in the status of one aspect of the environment or of human well-being is necessarily associated with a decline in or loss of a different aspect. Trade-offs characterize most complex systems, and are important to consider when making decisions that aim to improve environmental and/or socio-economic outcomes. Trade-offs are distinct from synergies (the latter are also referred to as “win-win” scenarios): synergies arise when the enhancement of one desirable outcome leads to enhancement of another.

Sustainable use assessment
trade-off

A situation where an improvement in the status of one aspect of the environment or of human well-being is necessarily associated with a decline in or loss of a different aspect. Trade-offs characterize most complex systems, and are important to consider when making decisions that aim to improve environmental and/or socio-economic outcomes. Trade-offs are distinct from synergies (the latter are also referred to as win-win scenarios): synergies arise when the enhancement of one desirable outcome leads to enhancement of another.

Land degradation and restoration assessment, Americas assessment, Asia-Pacific assessment, Africa assessment, Europe and Central Asia assessment
trade-off

A balance achieved between two desirable but incompatible features; a compromise.

Pollination assessment
trade-off

A trade-off is a situation where an improvement in the status of one aspect of the environment or of human well-being is necessarily associated with a decline in or loss of a different aspect. Trade-offs characterize most complex systems and are important to consider when making decisions that aim to improve environmental and/or socio-economic outcomes. Trade-offs are distinct from synergies (the latter are also referred to as “win-win” scenarios): synergies arise when the enhancement of one desirable outcome leads to enhancement of another.

Values assessment
traditional agriculture

Any type of farming that uses techniques developed over decades or centuries to ensure good, sustainable yields in a specific area or region. Traditional farms are based around mixed crops that complement one another.

Pollination assessment
traditional and community-based management system

Resource management strategies and practices based on accumulated indigenous and local knowledge acquired through community-based learning processes and transmitted between successive generations.

Sustainable use assessment, Global assessment (1st work programme)
traditional and local knowledge

see indigenous and local knowledge.

Scenarios and models assessment, Scenarios and models assessment
traditional ecological knowledge

Traditional Ecological Knowledge (TEK) is a cumulative body of knowledge and beliefs, handed down through generations by cultural transmission, about the relationship of living beings (including humans) with one another and with their environment. Further, TEK is an attribute of societies with historical continuity in resource use practices; by and large, there are non-industrial or less technologically advanced societies, many of them indigenous or tribal.

Sustainable use assessment
traditional ecosystem healing principle

Restoration and ecosystem management activities based on indigenous and local knowledge and often executed by IPLC to restore and maintain the healthy functioning of ecosystems.

Global assessment (1st work programme)
traditional farming

A term used to refer to complex, diverse and locally adapted agricultural systems, managed with time-tested through multi-generational experimentation, as well as diffusion of knowledge and practices. While the term ‘traditional’ is used to refer to a persisting long-term farming system, it does not intend to imply that such systems are static.

Global assessment (1st work programme)
traditional knowledge

See Indigenous and local knowledge.

Land degradation and restoration assessment
traditional knowledge

The concept of Traditional Knowledge (TK) in CBD has two characteristics. Firstly, CBD defines TK as one kind of knowledge, innovations and practices which is helpful to conservation and sustainable use of biodiversity. Secondly, CBD limits the TK to link with Indigenous and Local Communities (ILCs) embodying traditional lifestyles, i.e. these TK were created and preserved by ILCs and they are accumulated, developed and inherited generation by generation.

Asia-Pacific assessment
traditional knowledge

The concept of Traditional Knowledge (TK) in the Convention for Biological Diversity (CBD) has two characteristics. Firstly, CBD defines TK as one kind of knowledge, innovations and practices which is helpful to conservation and sustainable use of biodiversity. Secondly, CBD limits the TK to link with indigenous peoples and local communities (IPLCs) embodying traditional lifestyles, i.e. these TK were created and preserved by IPLCs and they are accumulated, developed and inherited generation by generation.

Sustainable use assessment
traditional medicinal practice

Traditional medicine is the sum total of the knowledge, skill, and practices based on the theories, beliefs, and experiences indigenous to different cultures, whether explicable or not, used in the maintenance of health as well as in the prevention, diagnosis, improvement or treatment of physical and mental illness.

Sustainable use assessment
tragedy of the commons

Title of an influential 1968 essay by biologist Garrett Hardin, which argued that overuse of common resources is a leading cause of environmental degradation. This was interpreted by some, especially economists and free-market libertarians, to mean that private ownership is preferable to the commons for the stewardship of land, water, minerals, etc. Yet in recent years many have challenged this view on both empirical and philosophical grounds. Professor Elinor Ostrom of Indiana University has been a leading figure in demonstrating the practical utility and sustainability of commons governance regimes, particularly in developing countries. This suggests that the vision of human behaviour implicit in the tragedy of the commons metaphor is not as immutable as many economists assert, and that collective management is an eminently practical governance strategy in many circumstances. The tragedy of the anti-commons is now frequently invoked to describe the problems associated with excessive privatization and fragmentation of property rights, such that collective action for the common good is thwarted. See also Commons” and Common pool resources”.

Land degradation and restoration assessment
tragedy of the commons

a situation in which individuals with access to a public resource (also called a common) act in their own interest and, in doing so, ultimately deplete the resource

Invasive alien species assessment
transboundary

Flows, interactions, relationships across boundary, in reference to jurisdictions, political units, physical nature features.

Sustainable use assessment, Asia-Pacific assessment
transboundary pollution

Pollution that originates in one country but, by crossing the border through pathways of water or air, can cause damage to the environment in another country.

Land degradation and restoration assessment
transformability (part of resilience)

The capacity to cross thresholds, enter new development trajectories, abandon unsustainable actions and chart better pathways to established targets (Folke et al. 2010).

Global assessment (1st work programme)
transformation

A change in the fundamental attributes of natural and human systems that reflect strengthened, altered, or aligned paradigms, goals, or values towards promoting adaptation that supports sustainable development, including poverty reduction.

Europe and Central Asia assessment
transformation

In an organizational context, it refers to profound and radical change that orients an organization in a new direction and takes it to an entirely different level of effectiveness.

Africa assessment
transformation

See land transformation.

Land degradation and restoration assessment
transformative change

Transformative change is defined in line with previous work of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services approved by its Plenary, as a fundamental, system-wide reorganization across technological, economic and social factors, including paradigms, goals and values, needed for the conservation and sustainable use of biodiversity, good quality of life and sustainable development.

Sustainable use assessment
transformative change

A fundamental, system-wide reorganization across technological, economic and social factors, including paradigms, goals and values (IPBES, 2018; IPCC, 2018).

Global assessment (1st work programme)
transformative change

A system wide change that requires more than technological change through consideration of social and economic factors that, with technology, can bring about rapid change at scale.

IPBES-IPCC co-sponsored workshop on biodiversity and climate change
transformative change

The IPBES Global Assessment defines transformative change as ‘a fundamental, system-wide reorganisation across technological, economic and social factors, including paradigms, goals and values. We build on this definition through reference to the depth, breadth and dynamics of system reorganisation. Depth refers to change that goes beyond addressing the symptoms of environmental change or their proximate drivers, such as new technologies, incentive systems or protected areas, to include changes to underlying drivers, including consumption preferences, beliefs, ideologies and social inequalities (IPBES, 2019; Patterson et al., 2017; Scoones et al., 2015). Breadth refers to change across multiple spheres, with emerging consensus that transformation requires co-evolutionary change across different spheres of society, including personal, economic, political, institutional and technological ones (Harvey, 2010; O’Brien & Sygna, 2013; Pelling et al., 2015; Temper et al., 2018; Westley et al., 2011). Dynamics and processes refer to the emergent patterns of change across ‘depths’, ‘breadths’ and time that unfold as non-linear pathways. These may be characterised by ‘punctuated equilibrium’ in which more stable periods of incremental change are punctuated by bursts of change in which underlying structures are reorganised into new states (Patterson et al., 2017; Westley et al., 2011).

Values assessment
transformative change

a fundamental, system-wide reorganization across technological, economic, and social factors making sustainability the norm

Invasive alien species assessment
transformative governance

the set of formal and informal (public and private) rules, rulemaking systems and actor networks at all levels of human society that enable transformative change

Invasive alien species assessment
transhumance

A Form of pastoralism or nomadism organized around the migration of livestock between mountain pastures in warm seasons and lower altitudes the rest of the year. The seasonal migration may also occur between lower and upper latitudes. A traditional farming practice based on indigenous and local knowledge.

Americas assessment
transhumance

Form of pastoralism or nomadism organized around the migration of livestock between mountain pastures in warm seasons and lower altitudes the rest of the year.

Land degradation and restoration assessment
transhumance

Form of pastoralism or nomadism organized around the migration of livestock between mountain pastures in warm seasons and lower altitudes the rest of the year. The seasonal migration may also occur between lower and upper latitudes. A traditional farming practice based on indigenous and local knowledge.

Europe and Central Asia assessment
transhumance

The action or practice of moving livestock from one grazing ground to another in a seasonal cycle, typically to lowlands in winter and highlands in summer.

Asia-Pacific assessment
transitional pathway

A course of actions and strategies that aim to achieve the vision. They are closely related to policy or target-seeking scenarios.

Europe and Central Asia assessment
translocation

The human-mediated movement of living organisms from one area, with release in another.

Asia-Pacific assessment
tree-covered area

A land cover class that includes any geographic area dominated by natural tree plants with a cover of 10 percent or more. Areas planted with trees for afforestation purposes and forest plantations are included in this class.

Land degradation and restoration assessment
trees outside forest

All trees excluded from the definition of forest and other wooded lands. Trees outside the forest are located on other lands, mostly on farmlands and built-up areas, both in rural and urban areas.

Asia-Pacific assessment
trend

The general direction in which the structure or dynamics of a system tends to change, even if individual observations vary.

Sustainable use assessment, Scenarios and models assessment
trend

A general development or change in a situation or in the way that people are behaving.

Land degradation and restoration assessment
trend

temporal trends are directional long-term changes (i.e., decades to centuries) in numbers of species, populations or individuals introduced, or the spatial extent of colonization (Buckland et al., 2017). In this assessment report, trends are presented as indicators of species numbers (species richness) and rates of accumulation of species (e.g., first records of a species in a given location) over time.

Invasive alien species assessment