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COSEWIC assessment and status report on the Boreal Felt Lichen in Canada

Technical Summary - Boreal population

Erioderma pedicellatum

Boreal Felt Lichen

Érioderme boreal

Range of Occurrence in Canada: Newfoundland


Extent and Area Information

Extent of occurrence (EO) (km2)<50 000
specify trend (decline, stable, increasing, unknown)decline
Are there extreme fluctuations in EO (> 1 order of magnitude)?no
Area of occupancy (AO) (km2)<100
specify trend (decline, stable, increasing, unknown) decline
are there extreme fluctuations in AO (> 1 order magnitude)?no
number of extant locations50?
specify trend in # locations (decline, stable, increasing, unknown)decline
are there extreme fluctuations in # locations (>1 order of magnitude)?no
habitat trend:  specify declining, stable, increasing or unknown trend in area, extent or quality of habitatdecline


Population Information

generation time (average age of parents in the population) (indicate years, months, days, etc.)30 years
number of mature individuals (capable of reproduction) in the Canadian population (or, specify a range of plausible values)<10 000?
total population trend:  specify declining, stable, increasing or unknown trend in number of mature individualsdecline
if decline, % decline over the last/next 10 years or 3 generations, whichever is greater (or specify if for shorter time period)?
are there extreme fluctuations in number of mature individuals (> 1 order of magnitude)?no
is the total population severely fragmented (most individuals found within small and relatively isolated (geographically or otherwise) populations between which there is little exchange, i.e., < 1 successful migrant / year)??
list each population and the number of mature individuals in eachtoo numerous; smallest pop. 1 thallus; largest pop. >1000 thalli; many extirpated in NL
specify trend in number of populations (decline, stable, increasing, unknown)decline
are there extreme fluctuations in number of populations (>1 order of magnitude)?no


Threats (actual or imminent threats to populations or habitats)

- air pollution; logging; moose browsing and other natural forest pest and fire impacts


Rescue Effect (immigration from an outside source): unlikely

does species exist elsewhere (in Canada or outside)?Nova Scotia
status of the outside population(s)?endangered
is immigration known or possible??
would immigrants be adapted to survive here??
is there sufficient habitat for immigrants here?likely


Quantitative Analysis

 

 


Technical Summary - Atlantic population

Erioderma pedicellatum

Boreal Felt Lichen

Érioderme boreal

Range of Occurrence in Canada: Nova Scotia, New Brunswick (extirpated)


Extent and Area Information

Extent of occurrence (EO) (km2)<5000
specify trend (decline, stable, increasing, unknown)Decline
Are there extreme fluctuations in EO (> 1 order of magnitude)?No
Area of occupancy (AO) (km2)<20?
specify trend (decline, stable, increasing, unknown) Decline
are there extreme fluctuations in AO (> 1 order magnitude)?No
number of extant locations3
specify trend in # locations (decline, stable, increasing, unknown)Decline
are there extreme fluctuations in # locations (>1 order of magnitude)?No
habitat trend:  specify declining, stable, increasing or unknown trend in area, extent or quality of habitatDecline


Population Information

generation time (average age of parents in the population) (indicate years, months, days, etc.)30 years
number of mature individuals (capable of reproduction) in the Canadian population (or, specify a range of plausible values)<15
total population trend:  specify declining, stable, increasing or unknown trend in number of mature individualsdecline
if decline, % decline over the last/next 10 years or 3 generations, whichever is greater (or specify if for shorter time period)?
are there extreme fluctuations in number of mature individuals (> 1 order of magnitude)?no
is the total population severely fragmented (most individuals found within small and relatively isolated (geographically or otherwise) populations between which there is little exchange, i.e., < 1 successful migrant / year)?yes
list each population and the number of mature individuals in eachNS-12, 1 thallus
NS-16, 1 thallus
NS-27, 11 thalli
specify trend in number of populations (decline, stable, increasing, unknown)decline
are there extreme fluctuations in number of populations (>1 order of magnitude)?no


Threats (actual or imminent threats to populations or habitats)

- air pollution; logging


Rescue Effect (immigration from an outside source): unlikely

does species exist elsewhere (in Canada or outside)?Newfoundland
status of the outside population(s)?special concern
is immigration known or possible??
would immigrants be adapted to survive here??
is there sufficient habitat for immigrants here?No


Quantitative Analysis