The New Zealand Threat Classification System is used by the Department of Conservation to assess conservation priorities of species in New Zealand. [1]
The system was developed because the IUCN Red List, a similar conservation status system, had some shortcomings for the unique requirements of conservation ranking in New Zealand. As of 2011, [update] plants, animals, and fungi are evaluated, though the lattermost has yet to be published. [2] Algae were assessed in 2005 but not reassessed since. [2] Other protists have not been evaluated. [2]
Species that are ranked are assigned categories: [3]
A series of qualifiers are used to give additional information on the threat classification: [1] [3]
Qualifier | Definition | |
---|---|---|
CD | Conservation Dependent | Likely to move to a higher threat category if current management ceases |
DP | Data Poor | Confidence in the listing is low due to the poor data available for assessment |
De | Designated | The criteria does not completely apply to the taxa |
EW | Extinct in the Wild | Exists only in cultivation or in captivity |
EF | Extreme Fluctuations | Extreme unnatural population fluctuations, or natural fluctuations overlaying human-induced declines, that increase the threat of extinction |
Inc | Increasing | Population thought to increase 10% over 3 generations or 10 years |
IE | Island Endemic | Endemic only to a single archipelago and not the main islands |
OL | One Location | Found at one location (geographically or ecologically distinct area) in which a single event (such as a predator irruption) could soon affect all individuals of the taxon |
PD | Partial Decline | Taxa has one or more secure populations but otherwise is declining |
RR | Range Restricted | taxa confined to less than 1,000 km2 (390 sq mi) |
RF | Recruitment Failure | Current population may appear stable but the age structure is such that catastrophic declines are likely in the future |
SO | Secure Overseas | Secure in other parts of its natural range outside New Zealand |
Sp | Sparse | Taxa in small, scattered populations |
ST | Stable | Total population stable |
TO | Threatened Overseas | Threatened in those parts of its natural range outside New Zealand |
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological species. A series of Regional Red Lists, which assess the risk of extinction to species within a political management unit, are also produced by countries and organizations.
Conservation status is a measure used in conservation biology to assess an ecoregion's degree of habitat alteration and habitat conservation. It is used to set priorities for conservation.
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