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  3. > Recovery Strategy for the Eastern Sand Darter (Ammocrypta pellucida) in Canada, Quebec populations: Table 3

Table 3. Assessment of threats to the recovery of the eastern sand darter, Quebec populations, based on different criteria. The first column lists the threats and the following columns describe them in terms of extent, occurrence, frequency, causal certainty, severity and level of concern. A table footnote specifies that the threat “Increased sediment input and siltation” combines the threats identified in other documents "shoreline modifications," "turbidity and sediment loading" and "wave action from passing boats", since the threats in this recovery strategy are identified in terms of their impact on individuals and their habitats

Table 3.  Classification of threats to the recovery of the eastern sand darter, Quebec populations.
Threats Extent Occurrence Frequency Causal Certainty Severity Level of Concern
Habitat Loss or Degradation and Pollution
Increased Sediment Input and Siltation (Combines the threats "shoreline modifications," "turbidity and excessive siltation" and "wave action from passing boats" set out in Boucher and Garceau, 2010, and DFO, 2011, since the threats in this recovery strategy are identified in terms of their impact on individuals or their habitats.) Widespread Current Continuous High High High
Alteration of Flow Regimes and Fluctuation in Water Levels Widespread Current Continuous High High High
Presence of Contaminants Widespread Current Continuous Moderate High High
Nutrient Loading Widespread Current Continuous Moderate High High
Barriers to Movement Localized Current Continuous Moderate Moderate Moderate
Exotic Species, Invasive or Introduced
Exotic Species and Diseases Localized Current Continuous High Moderate Moderate
Change in the Ecological Dynamics
Reduced Prey Availability Localized Anticipated Seasonal Low Unknown Low
Incidental Mortality
Incidental Harvest Localized Current Seasonal Low Low Low

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Date Modified:
2014-04-29