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COSEWIC Assessment and Status Report on the Banded Cord-moss in Canada

Technical Summary

Entosthodon fascicularis

Banded Cord-moss
entosthodon fasciculé

Area of Occurrence in Canada: BC


Extent and Area Information

Extent of occurrence (EO)(km2)

< 800 km2


specify trend (decline, stable, increasing, unknown)

unknown


are there extreme fluctuations in EO (>1 order of magnitude)?

No


area of occupancy (AO)(km2)

<1 km2


specify trend (decline, stable, increasing, unknown)

unknown


are there extreme fluctuations in AO (>1 order magnitude)?

unknown


number of extant locations

15 recent sites (since 1969)


specify trend in # locations (decline, stable, increasing, unknown)

Not known


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 habitat

Stable to declining (e.g., Garry oak habitats)



Population Information

generation time (average age of parents in the population) (indicate years, months, days, etc.)

unknown, but species may be a short-lived annual/biennual most visible for short periods in spring and early summer when capsules are present.


number of mature individuals (capable of reproduction) in the Canadian population (or, specify a range of plausible values)

unknown


total population trend:  specify declining, stable, increasing or unknown trend in number of mature individuals

unknown


if decline, % decline over the last/next 10 years or 3 generations, whichever is greater (or specify if for shorter time period)

unknown


are there extreme fluctuations in number of mature individuals (>1 order of magnitude)?

unknown


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)?

No


list each population and the number of mature individuals in each

unknown


specify trend in number of populations (decline, stable, increasing, unknown)

unknown


are there extreme fluctuations in number of populations (>1 order of magnitude)?

unknown



Threats (actual or imminent threats to populations or habitats)

  • Disturbance from recreational activities
  • Urban development
  • Climate change


Rescue Effect (immigration from an outside source)

does species exist elsewhere (in Canada or outside)?

yes - USA


status of the outside population(s)?

globally secure, but listed S1 in Oregon


is immigration known or possible?

unknown


would immigrants be adapted to survive here?

evidently


is there sufficient habitat for immigrants here?

evidently



Status and Reasons for Designation

Status: Special Concern

Alpha-numeric code: Not applicable

Reasons for Designation: This rare species is endemic to western North America. Almost all Canadian populations of this moss occur in the threatened Garry Oak habitat of southwestern British Columbia. Should habitat destruction continue at the present rate, the species will become increasingly vulnerable.


Applicability of Criteria

Criterion A (Declining Total Population):
Data are not available.

Criterion B (Small Distribution, and Decline or Fluctuation):
Area of occupancy is less than 500 km2; however, the species exists at 15 sites and is not severely fragmented.

Criterion C (Small Total Population Size and Decline):
Data are not available on number of individuals.

Criterion D (Very Small Population or Restricted Distribution):
Data are not available on number of individuals.

Criterion E (Quantitative Analysis):
Not applicable.