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

Russula albolutescens McNabb

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Scientific name
Russula albolutescens
Author
McNabb
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Russulales
Family
Russulaceae
Assessment status
Preliminary Assessed
Preliminary Category
VU B2a,biii
Proposed by
Jerry Cooper
Assessors
Jerry Cooper
Editors
Jerry Cooper
Contributors
Jerry Cooper

Assessment Notes

Justification

Area of occupancy estimated at 60 km2, with 7 known locations and concern over the extent and quality of habitat.


Taxonomic notes

Russula albolutescens is one of the more recognisable but uncommon Russula species associated with tea-tree (myrtaceae) with a thin pale cap and pectinate cap edge.

The genus has been extensively surveyed and studied in New Zealand over a period of 60 years. This species, and most other New Zealand Russula species are sequence barcoded.


Why suggested for a Global Red List Assessment?

A distinct pale species of Russula associated with tea-tree in areas under-going land-use change and impacted by invasive species.

Preliminary category: B2 Vulnerable


Geographic range


Population and Trends

Of the 7 known locations 4 are in unprotected areas with < 30% indigenous cover (indicating past clearance) adjacent to pasture grassland. The type locality, and centre of most records, is west of Auckland, where the original location from 1967 is now a built-up area and another has been cleared of tea-tree.  Populations will have decreased in the last 50 years.

We infer the presence 23 genotypes, x 10 to account for undetected colonies, x 5 to convert to an estimate of 1,150 mature individuals. Extent of Occurrence 80,000 km2, Area of Occupancy 60 km2

Population Trend:


Habitat and Ecology

The species is ectomycorrhizal and associated with tea-tree (myrtaceae)


Threats

The known populations west of Auckland in the Waitakai ranges are in areas with popular walking tracks and the area with significant Kauri die-back disease. Management of the disease may impact on the populations.
In many areas of New Zealand tea-tree has been, and continues to be, cleared for farming, with scrub remnants especially prone to clearing to support the deployment of large-scale automated irrigation equipment.


Conservation Actions


Research needed


Use and Trade


Bibliography


Known distribution - countries

Regional Population and Trends

Country Trend Redlisted