Post by Surroundx on Jan 26, 2018 11:11:55 GMT 1
Scientific Name: Delissea takeuchii Lammers
Synonym(s):
Delissea subcordata H.St.John
Taxonomic Source(s): Wagner, W.L., Herbst, D.R. and Lorence, D.H. 2005 onwards. Flora of the Hawaiian Islands website. Available at: botany.si.edu/pacificislandbiodiversity/hawaiianflora/index.htm.
Assessment Information [top]
Red List Category & Criteria: Critically Endangered (Possibly Extinct) D ver 3.1
Year Published: 2015
Date Assessed: 2015-08-13
Assessor(s): Keir, M., Portner, T., Caraway, V.L. & Kwon, J.
Reviewer(s): Chau, M. & Bruegmann, M.
Justification:
Delissea takeuchii is assessed as Critically Endangered (Possibly Extinct). The taxon is endemic to the island of Oʻahu in the Wai‘anae Mountains. The last known wild plants were observed in 1987, but there is still a possibility that it could be found in remaining habitat. This qualifies the taxon to a ranking of Critically Endangered (Possibly Extinct) under criterion D.
Date last seen: 1987
Geographic Range [top]
Range Description:
This species was endemic to the Hawaiian islands, found between 550 and 640 m asl in the Waiʻanae Mountains on the island of Oʻahu.
Countries occurrence:
Possibly extinct:
United States (Hawaiian Is.)
Additional data:
♦ Estimated area of occupancy (AOO) - km2: 0 ♦ Continuing decline in area of occupancy (AOO): Unknown
♦ Extreme fluctuations in area of occupancy (AOO): No ♦ Estimated extent of occurrence (EOO) - km2: 0
♦ Continuing decline in extent of occurrence (EOO): Unknown ♦ Extreme fluctuations in extent of occurrence (EOO): No
♦ Continuing decline in number of locations: Unknown
♦ Extreme fluctuations in the number of locations: Unknown ♦ Lower elevation limit (metres): 550
♦ Upper elevation limit (metres): 640
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population:
There are no remaining wild plants known.
Current Population Trend: Unknown
Additional data:
♦ Number of mature individuals: 0
♦ No. of subpopulations: 0 ♦ Continuing decline in subpopulations: Unknown
♦ Extreme fluctuations in subpopulations: Unknown
Habitat and Ecology [top]
Habitat and Ecology:
The taxon is a perennial shrub found in lowland mesic forest.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes
Use and Trade [top]
Use and Trade: There are no known uses for this species.
Threats [top]
Major Threat(s):
The major threats to this taxon include direct competition by invasive non-native plant species, especially Psidium cattleianum and Clidemia hirta, and predation and trampling by non-native animals, particularly pigs. It is ranked as vulnerable to climate change (index 0.692 in Fortini et al. 2013), due to loss of habitat.
Conservation Actions [top]
Conservation Actions:
The taxon is on the US Endangered Species List, and the State of Hawaiʻi Endangered Species List, but no plants are currently known.
Source: www.iucnredlist.org/details/79863661/0
Synonym(s):
Delissea subcordata H.St.John
Taxonomic Source(s): Wagner, W.L., Herbst, D.R. and Lorence, D.H. 2005 onwards. Flora of the Hawaiian Islands website. Available at: botany.si.edu/pacificislandbiodiversity/hawaiianflora/index.htm.
Assessment Information [top]
Red List Category & Criteria: Critically Endangered (Possibly Extinct) D ver 3.1
Year Published: 2015
Date Assessed: 2015-08-13
Assessor(s): Keir, M., Portner, T., Caraway, V.L. & Kwon, J.
Reviewer(s): Chau, M. & Bruegmann, M.
Justification:
Delissea takeuchii is assessed as Critically Endangered (Possibly Extinct). The taxon is endemic to the island of Oʻahu in the Wai‘anae Mountains. The last known wild plants were observed in 1987, but there is still a possibility that it could be found in remaining habitat. This qualifies the taxon to a ranking of Critically Endangered (Possibly Extinct) under criterion D.
Date last seen: 1987
Geographic Range [top]
Range Description:
This species was endemic to the Hawaiian islands, found between 550 and 640 m asl in the Waiʻanae Mountains on the island of Oʻahu.
Countries occurrence:
Possibly extinct:
United States (Hawaiian Is.)
Additional data:
♦ Estimated area of occupancy (AOO) - km2: 0 ♦ Continuing decline in area of occupancy (AOO): Unknown
♦ Extreme fluctuations in area of occupancy (AOO): No ♦ Estimated extent of occurrence (EOO) - km2: 0
♦ Continuing decline in extent of occurrence (EOO): Unknown ♦ Extreme fluctuations in extent of occurrence (EOO): No
♦ Continuing decline in number of locations: Unknown
♦ Extreme fluctuations in the number of locations: Unknown ♦ Lower elevation limit (metres): 550
♦ Upper elevation limit (metres): 640
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population:
There are no remaining wild plants known.
Current Population Trend: Unknown
Additional data:
♦ Number of mature individuals: 0
♦ No. of subpopulations: 0 ♦ Continuing decline in subpopulations: Unknown
♦ Extreme fluctuations in subpopulations: Unknown
Habitat and Ecology [top]
Habitat and Ecology:
The taxon is a perennial shrub found in lowland mesic forest.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes
Use and Trade [top]
Use and Trade: There are no known uses for this species.
Threats [top]
Major Threat(s):
The major threats to this taxon include direct competition by invasive non-native plant species, especially Psidium cattleianum and Clidemia hirta, and predation and trampling by non-native animals, particularly pigs. It is ranked as vulnerable to climate change (index 0.692 in Fortini et al. 2013), due to loss of habitat.
Conservation Actions [top]
Conservation Actions:
The taxon is on the US Endangered Species List, and the State of Hawaiʻi Endangered Species List, but no plants are currently known.
Source: www.iucnredlist.org/details/79863661/0
