List name
Lichen habitat index - Metalliferous Habitats Index (MHI)
Owner
davidgenney@gmail.com
List type
Conservation list
Description
The lichen flora of heavy metal mines has been reviewed and an index developed (Simkin, in press). The index is applicable to British sites contaminated by heavy metals (particularly lead, zinc, cadmium and copper) as a result of mining activity and may include disused mines, smeltmills, hushes, opencuts, and also the alluvial gravels downstream of these. Such habitats can support a very high lichen diversity: a collective total of 626 taxa (excluding species that primarily grow on trees) has been recorded, including eight Threatened and 18 Near Threatened species. Saxicolous and terricolous species are the main interest, principally in areas sparse of vegetation. The index comprises 49 taxa that are preferentially found in metal-rich habitats, of which 27 are saxicolous and 22 terricolous (Table 6) and applies to individual mine sites or mine complexes that are ecologically coherent. Sites are assessed on the total number of recorded species in Table 6 (saxicolous and terricolous taxa combined). A site supporting 10 or more should be considered for notification. There is considerable variation between orefields but a single selection threshold applies. Where no sites within an orefield qualify, the richest site within the AoS should be considered.
Date submitted
2018-03-26
Date updated
2018-03-26
Is private
No
Included in species pages
No
Authoritative
No
Invasive
No
Threatened
No
Part of the sensitive data service
No
Region
Not provided
Metadata link
https://registry.nbnatlas.org/public/show/dr1780

6 Number of Taxa

6 Distinct Species

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Lecidea endomelaena
Lecidea endomelaena Leight.
 
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Lecidea inops
Lecidea inops Th. Fr.
Copper Lecidea
 
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Porpidia flavicunda
Porpidia flavicunda (Ach.) Gowan
 
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Porpidia flavocruenta
Porpidia flavocruenta Fryday & Buschbom
 
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Porpidia melinodes
Porpidia melinodes (Körb.) Gowan & Ahti
 
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Steinia geophana
Steinia geophana (Nyl.) Stein
 
Action Supplied Name Scientific Name (matched) Image Author (matched) Common Name (matched)
Lecidea endomelaena Lecidea endomelaena Leight.
Lecidea inops Lecidea inops Th. Fr. Copper Lecidea
Porpidia flavicunda Porpidia flavicunda (Ach.) Gowan
Porpidia flavocruenta Porpidia flavocruenta Fryday & Buschbom
Porpidia melinodes Porpidia melinodes (Körb.) Gowan & Ahti
Steinia geophana Steinia geophana (Nyl.) Stein
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