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List of Chromista by conservation status

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From Wikipedia, the free encyclopedia

Species in Chromista (IUCN, 2025-2)

18 extant species have been evaluated
6 of those are fully assessed^[a]
0 are not threatened at present^[b]
6 to 18 are threatened^[c]
0 to 4 are extinct or extinct in the wild:
- 0 extinct(EX) species
- 0 extinct in the wild(EW)
- 4 possibly extinct[CR(PE)]
- 0 possibly extinct in the wild[CR(PEW)]

^excludesdata deficient evaluations.
^NT and LC.
^Threatened comprises CR, EN and VU. Upper estimate additionally includes DD.

As of September 2021^[update], theInternational Union for Conservation of Nature (IUCN) has evaluated the conservation status of 15 species withinChromista.^[1] The IUCN has not evaluated anyprotist species other than those in Phaeophyceae. No Chromista subspecies or subpopulations have been evaluated. No evaluated Chromista species are confirmed to beextinct, but four are tagged as possibly extinct.

As of 2005^[update] theNew Zealand Threat Classification System has evaluated 38 species ofmacroalgae as Threatened and 23 as Data Deficient.^[2] Some of these species are only of concern nationally.^[2]

IUCN evaluations

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Critically Endangered (possibly extinct)

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Bifurcaria galapagensis - Galapagos stringweed
Desmarestia tropica - tropical acidweed
Dictyota galapagensis
Spatoglossum schmittii

Endangered

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Sargassum setifolium - string sargassum

Vulnerable

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Eisenia galapagensis - Galapagos kelp

Data Deficient

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All are brown algae (Phaeophyceae):

Of theDictyotaceae,
Of theChordariaceae,
- Zosterocarpus abyssicola
Of theSargassaceae,
Of theSporochnaceae,
- Sporochnus rostratus

NZTCS evaluations

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Species of Algae (NZTCS, 2005)

61 extant species have been assessed
0 are Introduced and Naturalised
61 are Native (not Introduced and Naturalised)
- 22 are Not Evaluated or Data Deficient
- 38 are Evaluated
  - 0 of those Evaluated are Not Threatened
  - 37 of those Evaluated are At Risk
    - 37 of those At Risk are Range Restricted
  - 1 of those Evaluated are Threatened
    - 1 of those Threatened are Nationally Critical
  - 0 of those Evaluated are Extinct

Nationally Critical

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Dione arcuata - One Location

Range Restricted

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Caulerpa racemosa - Secure Overseas
Caulerpa sertulariodes - Secure Overseas, One Location
Caulerpa webbiana - Secure Overseas, One Location
Chlidophyllon kaspar - One Location
Chordariopsis capensis - Data Poor, Secure Overseas
Chrysymenia? polydactyla - Data Poor, One Location
Codium geppiorum - Secure Overseas, One Location
Curdiea balthazar - One Location
Dichotomaria marginata - Secure Overseas, One Location
Durvillaea sp. Antipodes WELT A17080 - One Location
Durvillaea chathamensis - One Location
Galaxaura cohaerens - One Location
Galaxaura filamentosa - One Location
Galaxaura rugosa - One Location
Ganonema farinosa - One Location
Gelidium allanii - Threatened Overseas
“Gelidium” ceramoides
Gelidium longipes - One Location
Gigartina sp. Bounty Is. - One Location
Gigartina dilatata -
Gigartina grandifida - One Location
Gigartina sp. Three Kings - One Location
Landsburgia ilicifolia - Data Poor, One Location
Landsburgia myricifolia - One Location
Lessonia adamsiae - One Location
Lessonia brevifolia -
Lessonia tholiformis - One Location
Marginariella parsonsii
Palmophyllum umbracola
Perisporochnus regalis - One Location
Predaea sp. - One Location
Psilosiphon scoparium - Threatened Overseas
Pterocladia lindaueri - One Location
Pyrophyllon cameronii - One Location
Sargassum johnsonii - One Location
Sonderopelta coriacea - Secure Overseas, One Location
Tricleocarpa cylindrica - Secure Overseas, One Location

Data Deficient

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Acrochaete endostraca
Acrochaetium leptonemioides - One Location
Acrochaetium neozeelandicum - One Location
Bangia spp.
Caulerpa fastigiata
Cephalocystis furcellata
Champiocolax sp.
Codium perriniae
Codium platyclados - Threatened? Overseas
Cutleria mollis
Entocladia spp.
Epicladia testarum
Erythrotrichia bangioides - One Location
Erythrotrichia hunterae - One Location
Giraudyopsis stellifera - Secure Overseas
Nemacystus novae-zelandiae
Ochlochaete hystrix
Ovillaria catenata
Porphyra spp.
Porphyridium purpuream - Secure Overseas
Pseudobryopsis planktonica - One Location
Sebdenia lindaueri - One Location
Syncoryne reinkei

References

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^"IUCN Red List version 2021-2".The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN).ISSN 2307-8235.Archived from the original on 8 September 2021. Retrieved8 September 2019.
^^a ^bHitchmough, Rod; Bull, Leigh; Cromarty, Pam (January 2007).New Zealand Threat Classification System lists 2005(PDF). Wellington, NZ: Science & Technical Publishing Department of Conservation.ISBN 978-0478141283.Archived(PDF) from the original on 31 January 2018. Retrieved2 February 2018.

Threatened species

Template: Threatened species by region

IUCN Red List

Categories¹

Extinct	Extinct (EX) Extinct in the Wild (EW)
Threatened	Critically Endangered (CR) Endangered (EN) Vulnerable (VU)
Lower risk	Near Threatened (NT) Least Concern (LC) Lower Risk (LR) Conservation Dependent (LR/cd)
Not fully assessed	Data Deficient (DD) Not Evaluated (NE)

Species

Lists	Extinct Extinct in the Wild Critically Endangered Endangered Vulnerable Near Threatened Least Concern Data Deficient
WP categories	Extinct Extinct in the Wild Critically Endangered Endangered Vulnerable Near Threatened Least Concern Data Deficient
CITES	Appendix I Appendix II Appendix III