Reference Document 3-1
Appendix 3
What is the estimated short-term population trend for the species in North Carolina?
(a) Decline of >90% (b) Decline of 80 - 90% (c) Decline of 70 - 80% (d) Decline of 50 - 70% (e) Decline of 30 - 50% (f) Decline of 10 - 30% (g) Relatively Stable (≤ 10% increase or decrease) (h) Increasing (≥ 10% increase)
Metric 8. Population Concentration. Some species tend to concentrate or aggregate at one or a few locations, especially during breeding seasons or migratory periods. These species may be at greater risk of extinction due to factors or events that can impact an entire population (Millsap et al. 1990) . This is most recently evident from the extensive loss of bat populations affected by white-nosed syndrome. A species may congregate or aggregate seasonally or daily at specific locations in North Carolina (e.g., hibernacula, breeding sites, migration focal points, communal roosting, etc.) or may use the habitat year-round. Aquatic species concentrations may be based on occurrence within a single watershed or because the species tends to congregate during spawning. Populations that are so rare they are restricted to small areas can be considered aggregations. Migratory waterfowl that use Coastal Plain communities for stop-over or wintering habitat and amphibians that breed in isolated pools are examples of populations with life histories that require they concentrate in specific areas. Wood Storks that breed in a few locations and have eggs or young on the nest could be at considerable risk from catastrophic events such as storms or fire. The reproductive success of a Gopher Frog population breeding in one location would be at risk if drought caused the pond or wetland to dry up before young matured. Another example would be the Bog Turtle, which uses discrete wetlands that are often small, concentrated patches within a larger landscape.
Is the species known or suspected to concentrate (or aggregate) in North Carolina?
(a) majority concentrates at single location or stream reach in NC (b) majority concentrates at 2 – 10 terrestrial locations or stream reaches in NC (c) majority concentrates at 11 – 25 terrestrial locations or stream reaches in NC (d) majority concentrates at > 25 terrestrial locations or stream reaches in NC (e) the species does not congregate or aggregate in NC
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2025 NC Wildlife Action Plan
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