Victorin’s gentian COSEWIC assessment and status report: chapter 11
Technical Summary
Gentianopsis procera ssp. macounii var. victorinii
Victorin’s gentian: Gentiane de Victorin
Extent and Area Information
(Based on GIS calculation of a polygon in which all points at outer limits of range are included):
(approximate total areas of shoreline habitat):
Population Information
list populations with number of mature individuals in each:
- Beaumont, Vincennes cove: 11-50
- Berthier-sur-Mer, Anse de Berthier: 55-110
- Berthier-sur-Mer, Road 561: 1
- Deschambault: 100-1000
- Grosse-Île: 200-400
- Ile aux Grues, wharf: 11-50
- Ile aux Grues, Rivière à Anguilles: 13-60
- L'Ange-Gardien, Casgrain Street: 51-100
- L'Ange-Gardien, du Fleuve Street: 51-100
- Lévis, Pointe Martinière: 15
- Montmagny: 1
- Neuville, Provancher marsh: 10-30
- Pointe-aux-Trembles-Ouest: 3-11
- Saint-Antoine-de-Tilly, Les Fonds: 11-50
- Saint-Augustin-de-Desmaures: 300-500
- Sainte-Croix, Pointe Platon: 111-1050
- Sainte-Pétronille: 32
- Sainte-Pétronille, Anse chez Porteous: 200-500
- Saint-François, pointe d'Argentenay: 100-1000
- Saint-Jean-de-Boischatel: 11-59
- Saint-Jean-Port-Joli, the two sides of the wharf: 30-120
- Saint-Jean-Port-Joli, Pointe à Menin: 50-100
- Saint-Roch-des Aulnaies, Pointe à Chouinard:70-100
- Saint-Laurent-d'Orléans : 32
- Saint-Laurent-d'Orléans, Village-des-Anglais: 25-100
- Saint-Nicolas, Anse Ross: 2-10
- Saint-Vallier, Pointe de Saint-Vallier: 200-400
Threats (actual or imminent threats to populations or habitats)
Actual threats
- human trampling: high risk
- mowing of grass beds: moderate
- shoreline filling: moderate
- flower picking: low
- insect predation of fruit: low
- ? ice scouring: low
- water quality and level: low
Potential threats
- limited habitat: low level of risk
- oil spills: moderate
Rescue Effect (immigration from an outside source)
Quantitative Analysis
Not Applicable
Other Status
- COSEWIC: Special Concern (1987)
- Quebec: Menacée
Status and Reasons for Designation
Status:
Alpha-numeric code: Threatened D2
Reasons for Designation: A geographically highly restricted and short-lived annual or biennial that is endemic to the freshwater or slightly brackish shoreline areas of the St. Lawrence River estuary in Quebec. It is present at 28 extant sites but in very small localized habitats where it is at risk from a wide range of impacts. These include habitat disruption by ATVs, shoreline in-filling, mowing of vegetation, picking of flowers and potentially from oil spills.
Applicability of Criteria
Criterion A (Declining Total Population): N/A. No overall declines documented but a significant increase in number of localities due to increased search effort.
Criterion B (Small Distribution, and Decline or Fluctuation): N/A. Extent of occurrence and area of occupancy are small but the taxon is not fragmented, population sizes do not fluctuate and the taxon occurs at 28 sites; habitat quality, however, has decreased and potential habitat for colonization has been greatly reduced.
Criterion C (Small Total Population Size and Decline): N/A. Total population estimate <10,000 but future decline of population size cannot reasonably be inferred in spite of some existing threats; some populations may contain >1000 plants and no extreme fluctuations are known.
Criterion D (Very Small Population or Restricted Distribution): Threatened under D2 with an area of occupancy <<20 km².
Criterion E (Quantitative Analysis): N/A
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