Habitats of North Carolina
Habitat Group:
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Members of General Hardwood Forests:
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General Hardwood Forests
Nutmeg Hickory Forests
General Description This habitat is based primarily on a symbiotic complex composed of just two species: Nutmeg Hickory and its obligate herbivore, the Nutmeg Underwing Moth. The Widow Sedge is also included since it appears to share the same habitat requirements as Nutmeg Hickory, occurring at the same site as that species although also at one other site in North Carolina with very similar habitat features but where the hickory and the underwing are absent.

Nutmeg Hickory is a strong calciphile, growing along rivers or mesic uplands where some form of calcareous geological formation located at or close to the surface. In North Carolina, the sole population of this species grows in a non-riverine wet flat where marl has outcrops right at the surface. Populations of this species are typically widely disjunct, with some -- as in the North Carolina population -- separated by hundred of miles from the next nearest occurrence. Surprisingly, many of the highly isolated stands of the tree are occupied by the Nutmeg Underwing -- patterns of dual disjunction this extreme are quite rare.

Abiotic Factors
Biotic Structure
Co-evolved Species Groups Phagic and Competitory Symbioses:
Carya myristiciformis // Catocala myristica

Determining Species
Carex basianthaWidow SedgeG5S1S10.33330
Carya myristiciformisNutmeg HickoryG4S1S10.33330
Catocala myristicaNutmeg UnderwingG3G4S1S10.33330
Nr = Number of Ranked Species = 3
Ner = Number of Extant, Ranked Species = 3
Nv = Number of Historic and Extirpated Species = 0
Nar = Number of Species at Risk of Extirpation (State rank > S5) = 3
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) = 0.99990
Average PE (ENE/Ner) = 0.33330
Habitat Risk Index = (Nar+Nv) x Average PE = 3 x 0.3333 = 0.9999

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
References Maisenhelder, L.C. and Francis, J.K., 1990. Carya myristiciformis (Michx. f.) Nutt. Nutmeg Hickory. Silvics of North America: Hardwoods, (654), p.215. Accessible online at: https://books.google.com/books?hl=en&lr=&id=bMnRqCA3uzwC&oi=fnd&pg=PA215&dq=%22nutmeg+hickory%22&ots=JhhprXjbrq&sig=4_MUkaF_PF6zZ2Ydafmwr4htUfs#v=onepage&q=%22nutmeg%20hickory%22&f=false
Updated on 2022-01-01 00:29:54