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  Indian J Med Microbiol
 

Figure 1: Summary of IUCN species recovery assessment process and outputs using a hypothetical species as an example. This is a simplified explanation that does not take into account all potential cases; for a full account, see IUCN 2021. The recovery assessment is based on the calculation of Green Scores, representing a species' current level of recovery (0-100%) compared to a historical baseline. Calculation is based on based on the state (Absent, Present, Viable, or Functional) in subdivisions of the species' range (spatial units). Note that ‘species range’ refers to its indigenous (pre-impact) and expected additional range (IUCN 2021). Note also that while the range has been divided into four spatial units in this example, more or fewer spatial units, or only one spatial unit, can be used, as appropriate for the species. In phase 1, range and spatial units are delineated, and the species' current Green Score is calculated based on the observed, estimated, or inferred condition of the species in each spatial unit. In phase 2, the expected score under different hypothetical scenarios with and without conservation is estimated in order to evaluate conservation impact. The differences between the Green Scores in these scenarios and the current Green Score represent four conservation impact metrics (IUCN 2021): the benefit of past conservation (Conservation Legacy), the expected cost of halting conservation today (Conservation Dependence), the expected short-term gains if conservation continues (Conservation Gain), and the maximum realistic recovery achievable for the species (Recovery Potential)

Figure 1: Summary of IUCN species recovery assessment process and outputs using a hypothetical species as an example. This is a simplified explanation that does not take into account all potential cases; for a full account, see IUCN 2021. The recovery assessment is based on the calculation of Green Scores, representing a species' current level of recovery (0-100%) compared to a historical baseline. Calculation is based on based on the state (Absent, Present, Viable, or Functional) in subdivisions of the species' range (spatial units). Note that ‘species range’ refers to its indigenous (pre-impact) and expected additional range (IUCN 2021). Note also that while the range has been divided into four spatial units in this example, more or fewer spatial units, or only one spatial unit, can be used, as appropriate for the species. In phase 1, range and spatial units are delineated, and the species' current Green Score is calculated based on the observed, estimated, or inferred condition of the species in each spatial unit. In phase 2, the expected score under different hypothetical scenarios with and without conservation is estimated in order to evaluate conservation impact. The differences between the Green Scores in these scenarios and the current Green Score represent four conservation impact metrics (IUCN 2021): the benefit of past conservation (Conservation Legacy), the expected cost of halting conservation today (Conservation Dependence), the expected short-term gains if conservation continues (Conservation Gain), and the maximum realistic recovery achievable for the species (Recovery Potential)