• Proposed
  • Under Assessment
  • ENPreliminary Assessed
  • 4Assessed
  • 5Published

Cantharellus decolorans Eyssart. & Buyck

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Scientific name
Cantharellus decolorans
Author
Eyssart. & Buyck
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Cantharellales
Family
Cantharellaceae
Assessment status
Preliminary Assessed
Preliminary Category
EN A4c
Proposed by
James Westrip
Assessors
James Westrip

Assessment Notes

Justification

Cantharellus decolorans is endemic to Madagascar. Ongoing deforestation is thought to be driving rapid declines in forest cover, and concomitantly driving rapid population declines in this species. An ongoing decline of at least 50% is suspected over three generations (50 years), and so C. decolorans is assessed as Endangered.


Taxonomic notes


Why suggested for a Global Red List Assessment?

Chanterelle project


Geographic range

This species is known from Uapaca-dominated montane regions of the Central Highlands and eastern Madagascar, with records from east of Antananarivo south to Ranomafana National Park (see Buyck et al. 2015).


Population and Trends

There is no quantitative information regarding the population size of this species. Ongoing threats to the species’ habitat, however, are likely to be driving rapid declines. Within the mapped range of this species there has been extensive loss of forest cover in the past two decades. Since 2000 (up to 2019) the amount of forest cover at 30% canopy cover had declined by 30% (World Resources Institute 2021). Assuming that such forest loss may continue in the future, and extrapolating forward so that rates are looked at over the appropriate three generation time period (50 years; see Dahlberg and Mueller 2011), this would give a reduction of 75%. Translating such declines into population declines is difficult, may it would be precautionary to suspect that the species may be undergoing an ongoing decline of at least 50% over three generations.

Population Trend: Decreasing


Habitat and Ecology

It has been recorded from montane forest, dominated by Uapaca trees, with one record found growing inside a rotten Pandanus (Buyck et al. 2015).

Subtropical/Tropical Moist Montane Forest

Threats

Ongoing forest loss is likely to be having a significant impact on this species’ habitat. The major drivers of this are land conversion for agriculture and logging.

Shifting agricultureSmall-holder farmingUnintentional effects: subsistence/small scale (species being assessed is not the target) [harvest]

Conservation Actions

This species has been recorded from the border of Ranomafana National Park, and near to Andasibe National Park, and so it is likely to occur in both. Identifying further areas that would be suitable for protection would be beneficial, not just for this species, but for the wider ecological community too.

Site/area protectionResource & habitat protection

Research needed

Research to see if the species may be more widespread would be beneficial, including confirming how may protected areas the species may occur in.

Population size, distribution & trends

Use and Trade


Bibliography


Country occurrence

Regional Population and Trends

Country Trend Redlisted