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

Gelatinodiscus flavidus Kanouse & A.H. Sm.

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Scientific name
Gelatinodiscus flavidus
Author
Kanouse & A.H. Sm.
Common names
 
IUCN Specialist Group
Cup-fungi, Truffles and Allies
Kingdom
Fungi
Phylum
Ascomycota
Class
Leotiomycetes
Order
Helotiales
Family
Helotiaceae
Assessment status
Preliminary Assessed
Preliminary Category
NT A3c+4c
Proposed by
Noah Siegel
Assessors
Noah Siegel
Reviewers
Anders Dahlberg

Assessment Status Notes

May be to common to be assessed as NT under C2ai.  Also - as it is a litter forming fungus - it is assessed with 20 year corresponding to three generations, e.g. the decline of habitat needs to be projected to exceed 20% during 20yrs. Is that feasible?

Justification

A rare ? saprobic fungus with small, brightly colored fruitbodies produced on Incense Cedar and Yellow Cedar needles near melting snowbanks in spring and early summer. Easily recognizable by the habitat, in combination with the gelatinous texture, and convex to round ‘heads’ and short to nearly indistinct stipe. Distributed in California, Oregon, Washington in USA and British Columbia in Canada. Decline in winter snow-pack has resulted in loss of habit for this species. Climate change is causing warmer and drier winters with elevated and lessened average snowfall and is projected to cause a gradual loss and deterioration of appropriate habitat for this species.

The habitat loss is estimated to exceed 20% in the coming 20 years check), corresponding to estimate for three generations for litter fungi It is listed as Near Threatened due to ongoing and projected reduction in population size due to habitat change caused by climate change.

OR

The populations size is estimated not to exceed 15 000 mature individuals. It is listed as Near Threathened due its small population and ongoing reduction in population size caused by climate change.


Taxonomic notes

The current name is Chloroscypha flavida (Kanouse & A.H. Sm.) Baral.

Originally described as Gelatinodiscus flavidus by Kanouse & Smith in 1940; genetic research has shown close affiliation to Chloroscypha, and this species was transferred to that genus by Baral in 2013.


Why suggested for a Global Red List Assessment?

Noah - check revised and extended version.


Geographic range

Gelatinodiscus flavidus is only known from high elevations in Western North America; from California, Oregon Washington in USA and from British Columbia in Canada.


Population and Trends

Known from twenty-six locations (2018) from the Mount Shasta area in California, continuing north in the Cascades and Olympic ranges into British Columbia, Canada (four locations in the southern Cascades in California, six in Oregon, seven in Washington, and nine sites in British Columbia, Canada).
COULD THE TENATIVE STATUS BE DESCRIBES AS BELOW (PLEASE REVISE AND EDIT)
It is confined to high elevation ??? forests. These forests are affected by changing climate; with warmer and drier winters that have elevated and lessened the average snowfall (ANY REFERENCES). Climate change cause and is projected to cause a continued loss and decline of appropriate habitat for G. flavidus. A SENTENCE ABOUT THE PROJECTED FUTURE IF POSSIBLE WITH REFERENCE? This snowpack fungus has only been recorded a few times and is considered as a rare fungus albeit certainly over-looked within its habitat restricted geographic distribution. The total number of locations is conservatively not considered to exceed 500 (750?) corresponding to less than 15000 mature individuals.

Population Trend: Deteriorating


Habitat and Ecology

It is a saprotrophic fungus growing on Incense Cedar (Calocedrus decurrens) and Yellow Cedar (Cupressus nootkatensis) needles near melting snowbanks in spring and early summer. Appears to need suffencint winter snowpack to fruit.

Temperate Forest

Threats

This species is dependent on thick winter snowpacks to fruit. Snowbank fungi, unique to the western North American mountains, occur/fruit in areas with ample snowpack. They fruit in the spring and summer, as the snow melts and recedes. As the climate changes, warmer and drier winters have elevated and lessened the average snowfall. Climate change, continued loss of habitat, decline in area of old growth forests, and hotter, stand replacing fires are likely detrimental to this species. 

LOSS OF Cupressus nootkatensis???
WOULD BE GOOD WITH A REFERENCE THAT PROJECT EFFECTS OF CLIMATE CHANGE IN THE MOUNTAINS OF W NAM.


Conservation Actions


Research needed


Use and Trade


Bibliography

Kanouse, B.B. & A.H. Smith. 1940. Two new genera of Discomycetes from the Olympic National Forest. Mycologia 32: 756–759

Castellano, M., J.E. Smith, T. O’Dell, E. Cázares &S. Nugent. 1999. Handbook to Strategy 1 Fungal Species in the Northwest Forest Plan. General Technical Report PNW-GTR-476. United States Department of Agriculture

Baral, H.O.; Galán, R.; Platas, G.; Tena, R. 2013. Phaeohelotium undulatum comb. nov. and P. succineoguttulatum sp. nov., two segregates of the Discinella terrestris aggregate found under Eucalyptus in Spain: taxonomy, molecular biology, ecology and distribution. Mycosystema 32(3): 386–428

Siegel, N. 2017. United States Forest Service R5 rare species assessment. USFS internal document.

MyCoPortal. Mycology Collections Portal. Available at: http://mycoportal.org

 


Known distribution - countries

Regional Population and Trends

Country Trend Redlisted