new Zealand Threat Classification System
{{short description|System to assess the conservation priorities of New Zealand species}}
{{Use New Zealand English|date=October 2024}}
{{Use dmy dates|date=April 2025}}
The New Zealand Threat Classification System is used by the Department of Conservation to assess conservation priorities of species in New Zealand.{{cite web |last=Molloy |first=Janice |last2=Bell |first2=B. |last3=Clout |first3=M. |last4=de Lange |first4=P. |last5=Gibbs |first5=G. |last6=Given |first6=D. |last7=Norton |first7=D. |last8=Smith |first8=N. |last9=Stephens |first9=T. |title=Classifying species according to threat of extinction. A system for New Zealand. |publisher=Department of Conservation (New Zealand) |year=2002 |url=http://www.doc.govt.nz/upload/documents/science-and-technical/TSOP22.pdf |access-date=2008-02-29 }}
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|post=,}} plants, animals, and fungi are evaluated, though the lattermost has yet to be published.{{cite book |last1=Hitchmough |first1=Rod |url=http://www.doc.govt.nz/Documents/science-and-technical/nztcs1entire.pdf |title=Summary of changes to the conservation status of taxa in the 2008–11 New Zealand Threat Classification System listing cycle|date=June 2013 |publisher=Publishing Team, Department of Conservation |isbn=9780478149869 |location=Wellington, NZ |language=en |issn=2324-1713 |access-date=2 February 2018 }} Algae were assessed in 2005 but not reassessed since. Other protists have not been evaluated.
Categories
File:NZTCS_2007_classifications.png
;Threatened
:This category has three major divisions:
:*Nationally Critical - equivalent to the IUCN category of Critically endangered
:*Nationally Endangered - equivalent to the IUCN category of Endangered
:*Nationally Vulnerable - equivalent to the IUCN category of Vulnerable
;At Risk
:This has four categories:
:*Declining
:*Recovering
:*Relict
:*Naturally Uncommon
= Other categories =
; Introduced and Naturalised
: These are any species that are deliberately or accidentally introduced into New Zealand.
; Migrant
: Migrant species are those that visit New Zealand as part of their life cycle.
; Vagrant
: Vagrants are taxa that are rare in New Zealand that have made their own way and do not breed successfully.
; Coloniser
: These taxa have arrived in New Zealand without human help and reproduce successfully.
; Data Deficient
: This category lists taxa for which insufficient information is available to make as assessment on conservation status.
; Extinct
: Taxa for which there is no reasonable doubt that no individuals exist are ranked as extinct. For these lists only species that have become extinct since 1840 are listed.
; Not Threatened
: If taxa fit into none of the other categories they are listed in the Not Threatened category.
Qualifiers
A series of qualifiers are used to give additional information on the threat classification:
| class="wikitable"
! colspan=2 scope="col" | Qualifier ! scope="col" | 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 {{convert|1000|km2|abbr=on}} |
| 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 |
See also
References
{{Reflist|30em}}
External links
- Department of Conservation's [https://www.doc.govt.nz/about-us/science-publications/conservation-publications/nz-threat-classification-system/ New Zealand Threat Classification System website]
- [https://nztcs.org.nz NZTCS Database]
- [http://www.doc.govt.nz/publications/conservation/nz-threat-classification-system New Zealand Threat Classification System past conservation status lists and manuals]