Taxonomy
Scientific name
Authority
Synonyms
Common names
Taxonomic sources
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Identification Information
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Taxonomic notes
Assessment Information
- IUCN Red List Category and Criteria
- Endangered B2ab(iii,v) ver 3.1
- Assessment language
- English
- Year published
- 2016
- Date assessed
- 2015-10-22 00:00:00 UTC
Previously published Red List assessments
Regional assessments
Reviewer(s)
Contributor(s)
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Assessor(s)
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Facilitator(s) / Compiler(s)
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Partner(s) / Institution(s)
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Authority / Authorities
Geographic Range
Native
Extant (resident)
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Extant
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Population
Since 2009, the Korean National Arboretum has surveyed the population of I. odaesanensis. Based on these survey, there are 17 subpopulations in South Korea holding ca. 56,000 individuals, with subpopulation size ranging from 10-50,000 individuals (average subpopulation size is 5,600). Beoncheon-ri, Hajang-myeon, Samcheok-si, holds the largest subpopulation with 50,000 individuals (25,000 flowering adults). Based on census estimates, the total population size in South Korea cannot exceed 100,000 individuals.
Habitat and Ecology
Terrestrial
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This species prefers slightly well drained, acid, and rich soils (Cheon et al. 2010). It flowers in April and May like spring ephemerals before the forest crown closes over. It tends to be abundant where it occurs, growing in dense patches and can colonize disturbed sites. It is usually found in forests dominated by Quercus monglica, Prunus sargentii, Pinus densiflora, and Salix koreensis (Cheon et al. 2010). In this deciduous mixed forest community, a group of correlated species may be recognized: Lespedeza maximowiczii, Lindera obtusiloba, Rhododendron schlippenbachii, Carex siderosticta, Meehania urticifolia, Spodiopodigon cotulifer, Aconitum pseudolaeve, Carex bostrychostigma and Disporum smilacinum (Cheon et al. 2010).
Chung et al. (2015) tried to compare genetic diversity and clonal diversities between I. odaesanensis and its temperate congener, I. rossii. It was clear that there was lower clonal diversity in I. odaesanensis compared to I. rossii. According to the results of I. odaesanensis, the skewed distribution of ramet numbers per genet suggests repeated seedling recruitment is the main strategy operating within the multiclonal populations (Chung et al. 2015). Based on the allozyme diversity analysis, a outcrossing breeding system is predominant for this species (Chung et al. 2015).
Chung et al. (2015) tried to compare genetic diversity and clonal diversities between I. odaesanensis and its temperate congener, I. rossii. It was clear that there was lower clonal diversity in I. odaesanensis compared to I. rossii. According to the results of I. odaesanensis, the skewed distribution of ramet numbers per genet suggests repeated seedling recruitment is the main strategy operating within the multiclonal populations (Chung et al. 2015). Based on the allozyme diversity analysis, a outcrossing breeding system is predominant for this species (Chung et al. 2015).
Classification scheme
| Habitats | Suitability | Major importance |
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Threats
The attractive flower produced by I. odaesanensis has resulted in the species being collected for a long time. It had been protected as a rare plant by law, however, this species was delisted from Korean national Endangered species list. Individuals in private botanical gardens are often collected illegally or/and without collection and monitoring data.
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The main threat to this species is the loss of mature individuals by collection for ornamental use (Korea Ministry of Environment 2012). Most of these plants are found along mountain trails, so its habitats are vulnerable to degredation by hikers. Habitat loss and degradation could be major threats to this species as a result of expanding agriculture and deforestation (Chang and Seok 1997, Kim and Park 2001, Bae 2009).
Classification scheme
Threats
| title | scope | timing | score | severity |
|---|---|---|---|---|
Use trade
The attractive flower produced by I. odaesanensis has resulted in the species being collected for a long time. It had been protected as a rare plant by law, however, this species was delisted from Korean national Endangered species list. Individuals in private botanical gardens are often collected illegally or/and without collection and monitoring data.
Text summary
Chang et al. (2005) assessed Iris odaesanensis as Endangered (EN B2ab) for eight subpopulations in South Korea. Lee (2009) also assessed this species as Vulnerable (VU B1a(ii,iv,v)+2a(ii,iv,v);C1+2(i,ii)) in Korea, but without providing justification or data. The Korean Ministry of Environment (2012) assessed this species as Least Concern (LC), again without providing scientific data or justification. Iris odaesanensis had been listed as priority species on the national Endangered species list by the Korean Ministry of Environment since 2005. In 2012, the Ministry of Environment delisted this species from the national Endangered species (Kim et al. 2011).
There are no conservation measures in place for I. koreana. Although the threats are of low to medium impact, the following actions are recommended to keep the population trend stable:
There are no conservation measures in place for I. koreana. Although the threats are of low to medium impact, the following actions are recommended to keep the population trend stable:
- Protection of the species sites from habitat loss and fragmentation, deforestation, ruthless collection, and overgrazing.
- Extensive taxonomic study with possible relative species.
- Monitoring and surveillance of the existing declining populations and vulnerable sites.
- Estimation of population sizes and study of their dynamics, trends, biology and ecology.
- Protection of living individuals of the species through legislation and legal protection which ban the species being picked or dug up.