Habitats of North Carolina
Habitat Group:
Habitat Type:
Members of General Shrublands:
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General Shrublands
St. John's-wort Thickets
No image for this habitat.
General Description
Abiotic Factors
Biotic Structure
Co-evolved Species Groups
Determining Species
Agonopterix lythrellaS2S40.00407
Caloptilia hypericellaa leaf blotch miner mothS3S40.00132
Iodopepla u-albumA noctuid mothG5S4S40.00041
Nedra ramosulaGray Half-SpotG5S4S40.00041
Agonopterix hyperellaSH
Nr = Number of Ranked Species = 5
Ner = Number of Extant, Ranked Species = 4
Nv = Number of Historic and Extirpated Species = 1
Nar = Number of Species at Risk of Extirpation (State rank > S5) = 4
Nss = Number of Secure Species (State Rank = S5) = 0
Pss = Proportion of Secure Species (Nss/Ner) = 0.00000
ENE = Expected Number of Extirpations (Sum of PE) = 0.00621
Average PE (ENE/Ner) = 0.00155
Habitat Risk Index = (Nar+Nv) x Average PE = 5 x 0.00155 = 0.00775

Estimated Risk to the Determining Species
Estimated Risk to the Co-evolved Species Groups
Estimated Security of the Habitat
Index of Habitat Imperilment
Identified Risks
Observed Trends
Distribution Map
Major Conservation Reserves
Priority Areas for Surveys and Conservation Protection
Stewardship and Management Recommendations
Updated on 0000-00-00 00:00:00