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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)
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
trophic cascades

The chain of knock-on extinctions observed or predicted to occur following the loss of one or a few species that play a critical role (e.g. as a pollinator) in ecosystem functioning.

Europe and Central Asia assessment, Asia-Pacific assessment, Sustainable use assessment
trophic level

The level in the food chain in which one group of organisms serves as a source of nutrition for another group of organisms (e.g. primary producers, primary or secondary consumers, decomposers).

Europe and Central Asia assessment, Americas assessment, Sustainable use assessment
trophic level

The level in the food chain in which one group of organisms serves as a source of nutrition for another group of organisms.

Global assessment (1st work programme), Land degradation and restoration assessment
trophic transfer

The transport of contaminants between two trophic levels (Suedel et al., 1994).

Global assessment (1st work programme)
trophy hunting

Trophy hunting is defined as the hunting for one or more individuals of a particular species with specific desired characteristics (such as large size or antlers) with the payment of a fee by a hunter for a hunting experience and trophy. The most common trophy is the mounted head with horns or antlers, although other parts of animal body ( skins, tails, teeth, heads) or even the whole bodies can be also appreciated as a trophy.

Sustainable use assessment
turbidity

Turbidity describes the cloudiness of water caused by suspended particles such as clay and silts, chemical precipitates such as manganese and iron, and organic particles such as plant debris and organisms.

Americas assessment