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Entoloma eugenei Noordel. & O.V. Morozova

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Scientific name
Entoloma eugenei
Author
Noordel. & O.V. Morozova
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Agaricales
Family
Entolomataceae
Assessment status
Published
Assessment date
2019-03-29
IUCN Red List Category
EN
IUCN Red List Criteria
C2a(i)
Assessors
Morozova, O. & Svetasheva, T.
Reviewers
Brandrud, T.-E. & Krisai-Greilhuber, I.

Assessment Notes

The content on this page is fetched from The IUCN Red List of Threatened Species: https://www.iucnredlist.org/species/148209013/148254863

Justification

Entoloma eugenei is a recently described, very rare saprothropic fungus growing on soil and litter in temperate broadleaved forests in Eastern Asia. It forms large and easy recognizable fruit bodies due to beautiful intensive blue colour of a cap and stem contrasting with white lamellae, therefore it could be hardly overlooked during mycological forays. However, it has only been found in seven small localities of three countries: Russia, Japan and South Korea. The current situation with timber harvesting in Asian countries is quite dramatic, so the suitable habitats for this species are declining.

From the available suitable habitat, the species is thought to be possibly present at a maximum of 100 localities, which correlate with 2,000 mature individuals. The number of mature individuals in each subpopulation is assumed to be below 250. With a continuing decline on its habitat quality and extension caused by the severe deforestation currently taking place, the species is assessed as EN C2a(i).

Geographic range

Entoloma eugenei is an East Asian species, known from the region of the Russian Far East - Primorsky Krai, “Kedrovaya Pad” Nature Reserve. It is also found in Japan (confirmed by sequence; under the name Entoloma aff. kujuense, Morozova et al. 2014) and South Korea (Kim et al. 2015).

Population and Trends

In the Russian Far East it was found several times during the period 2005-2011 in five localities (partly identified as E. nitidum) situated in the floodplain forests along the Kedrovaya river and the Ananievka river. The area of occurrence in Russia is about 80-120 km2. Only one locality is known in Japan and one in Korea (Kim et al. 2015).

This species could be present in the other close areas in the southern part of the Russian Far East. Inside the Kedrovaya Pad Nature Reserve the population can be considered quite stable. However, in the Russian Far East forest sector there is a massive timber harvesting (Teplyakov 2011, Smimov et al. 2013, Feditchkina and Lankin 2016, Flintoff 2013, Spivak 2018, Eremenko 2014, Conner 2013). Also in South Korea there are evidence of deforestation in montane deciduous forest (Allison 2016).

Therefore the current trends of species population in general is considered to be declining, but this needs to be assessed more precisely. It is possible to assume that we have a small and declining population with a total number of localities including unknown possible habitats about 70-100, and number of mature individuals 1,400-2,000 (70х2х10) (Dahlberg and Mueller 2011).

Population Trend: decreasing


Habitat and Ecology

Entoloma eugenei is a saprothropic species growing on soil and litter in broadleaved forests.  

In the Russian Far East Entoloma eugenei was collected in floodplain forests along the Kedrovka river and the Ananievka river. Usually these forests are poly-dominant communities containing many tree species: Quercus mongolica, Tilia amurensis, T. mandshurica, Fraxinus rhynchophylla, Acer mono, Betula dahurica, B. lutea, Ulmus laciniata, U. japonica, Alnus hirsuta, Populus maximowiczii, Salix schwerinii and S. gracilistyla

In South Korea it was found in mountain woodland at 1,242 m elevation (Kim et al. 2015). The habitat was poorly described as “Humus in woodland”. There are no any data on ecology of finds from Japan.

All the records from Russia are from a nature reserve; in Korea also apparently from little disturbed forest from mountain area. The habitat is thus likely to be a well-developed woodland little disturbed by man.

Threats

Threats to this species are the loss of suitable habitats, destruction, and disturbance of known localities and nearby areas which could be potential habitat. The main threats are logging and deforestation (Teplyakov 2011, Smimov et al. 2013, Feditchkina and Lankin 2016, Flintoff 2013, Spivak 2018, Eremenko 2014, Conner 2013, Allison 2016), removal of forest litter, and destruction of litter and upper soil layer by forest management. In addition, wild boars (where their population is large or quickly increasing) pose some threat due to disturbing the litter and humus layer.

Conservation Actions

The key conservation action for this species is the protection of all known localities, in addition to perform wild boar population regulation. Further research is required to search for new localities in the suitable habitat. This could be a flag fungi species for other less known and threatened species in this habitat.

Use and Trade

The species is not known to be used.

Source and Citation

Morozova, O. & Svetasheva, T. 2019. Entoloma eugenei. The IUCN Red List of Threatened Species 2019: e.T148209013A148254863. https://dx.doi.org/10.2305/IUCN.UK.2019-2.RLTS.T148209013A148254863.en .Downloaded on 31 January 2021

Country occurrence