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

Cortinarius dalecarlicus Brandrud

Go to another Suggested Species...

Scientific name
Cortinarius dalecarlicus
Author
Brandrud
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Agaricales
Family
Cortinariaceae
Assessment status
Preliminary Assessed
Preliminary Category
VU C2 a(i)
Proposed by
Tor Erik Brandrud
Assessors
Tor Erik Brandrud
Comments etc.
Anders Dahlberg, Irja Saar

Assessment Notes

Justification

The estimated European and global population thus adds up to approx 400 localities, which corresponds to 8 000 individuals according to IUCN standards.
Cortinarius dalecarlicus is, like its habitat, calcareous spruce forests, assumed to have had a decline of 15-20% in the evaluation period.
Based on this, the species becomes red-listed as NT according to the A-criterion (A2c + 3c + 4c) (species/habitat decline >15%). According to the C criterion (C2 a(i)), the species becomes red-listed as VU, based on a continuous decline, population size <10 000 individuals and very small/isolated subpopulations.


Taxonomic notes

Cortinarius dalecarlicus is well-circumscribed and rather easy identifiable, although it might resemble a few, sometimes co-occurring species such as C. piceae, C. corrosus and C. kristinae.


Why suggested for a Global Red List Assessment?

Cortinarius dalecarlicus is a mycorrhizal species associated mainly with Picea abies, probably also with Abies alba and Pinus sylvestis. The species is strictly calciphilous, and its major habitat is boreal calcareous spruce forests. The species is rare, known only from calcareous districts of S-C Scandinavia, and a few sites in the Prealps (C Europe).
Cortinarius dalecarlicus is suffering from decline of calcareous coniferous forest types, due to e.g. areal loss in more heavy populated areas and loss/fragmentation of older coniferous forest stands due to modern (clear-cut) forestry. Its major habitat, mature calcareous Picea abies forests, are now being regarded as threatened in Scandinavia.


Geographic range

Cortinarius dalecarlicus belongs to a bicentric boreal-montane coniferous forest element in (western) Europe. It has its main distribution in SE-C Norway (Oslo-Mjøsa region, Trondheimsfjord and SE-C Sweden (Gotland-Uppland-Dalarne-Jämtland), as well as Estonia. In Central/Western Europe the species is known only from a very few sites in The French Jura, Prealps, the Austrian Prealps and the Italian Prealps of S Tyrol. It is probable that the species occur also in other parts of the Prealps, possibly also further east in the Carphatians. It should be noted that investigations so far indicate that this species and some other more or less strictly calcareous Picea abies forest associated taxa (such as C. caesiocinctus and C. piceae) lacks in Siberia and North America, and this seems to be a strictly European element.


Population and Trends

The species is known from approx 15 localities of Norway (mainly the Tyrifjord-Randsfjord-Mjøsa district of SE Norway, and the lake Snåsavatn district of inner Trondheimsfjord of C Norway), and approx 15 localities from SE-C Sweden (Gotland, Uppland/Gävle, Dalarne and Jämtland). The real, total number of localities in Scandinavia is estimated to approx 300. So far, the species is found in 5 sites in Central Europe in Jura-Prealp region. Here we assume that the species might bee more overlooked, and estimate the real, total number of localities to be approx 100. The estimated European and global population thus adds up to approx 400 localities, which corresponds to 8 000 individuals according to IUCN standards.
Cortinarius dalecarlicus is, like its habitat, calcareous spruce forests, assumed to have had a decline of 15-20% in the evaluation period.
Based on this, the species becomes red-listed as NT according to the A-criterion (A2c + 3c + 4c) (species/habitat decline >15%). According to the C criterion (C2 a(i)), the species becomes red-listed as VU, based on a continuous decline, population size <10 000 individuals and very small/isolated subpopulations.

Population Trend: Decreasing


Habitat and Ecology

Cortinarius dalecarlicus is a mycorrhizal species associated mainly with Picea abies, probably also with Abies alba and Pinus sylvestis. The species is strictly calciphilous, and its major habitat is boreal calcareous spruce forests.

Boreal Forest

Threats

Cortinarius dalecarlicus is suffering from decline of calcareous coniferous forest types, due to e.g. areal loss in more heavy populated areas and loss/fragmentation of older coniferous forest stands due to modern (clear-cut) forestry. Its major habitat, mature calcareous Picea abies forests, are now being regarded as threatened in Scandinavia.

Housing & urban areasUnintentional effects: large scale (species being assessed is not the target) [harvest]

Conservation Actions

To prevent decline and further fragmentation of calcareous Picea abies(-Abies alba) forests with good habitat quality, it is important to set aside reserves on calcareous hotspots, housing many rare/redlisted, habitat-specific species such as C. caesiocinctus, C. meinhardii andC. piceae. It is furthermore important to establish also sites with a less strict conservation regime, such as woodland key biotopes, where some non-destructive human activities are accepted (such as non-intensive, closed cutting).

Site/area protection

Research needed

More mapping/surveying and monitoring of C. dalecarlicus are needed. More data on occurrences in calcareous Picea abies forests of E Europe are especially needed (little investigated regions). Finally, more documentation on the degree of decline of the habitat itself is needed.

Population size, distribution & trendsLife history & ecologyThreats

Use and Trade


Bibliography


Known distribution - countries

Regional Population and Trends

Country Trend Redlisted