4Th Approximation Guide February 2012
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GUIDE TO THE NATURAL COMMUNITIES OF NORTH CAROLINA FOURTH APPROXIMATION March 2012 Michael P. Schafale North Carolina Natural Heritage Program Department of Environment and Natural Resources Table of Contents INTRODUCTION ...................................................................................................................................... 1 DEFINITION OF NATURAL COMMUNITIES .................................................................................. 1 NEED FOR A NEW APPROXIMATION ............................................................................................. 1 STRUCTURE OF THE 4 TH APPROXIMATION CLASSIFICATION ................................................ 2 CLASSIFICATION APPROACH .......................................................................................................... 2 4TH APPROXIMATION COMPONENTS AND TIMETABLE ........................................................... 4 Spruce-Fir Forests ....................................................................................................................................... 6 FRASER FIR FOREST (HERB SUBTYPE) ......................................................................................... 6 FRASER FIR FOREST (RHODODENDRON SUBTYPE) .................................................................. 6 RED SPRUCE–FRASER FIR FOREST (HERB SUBTYPE) ............................................................... 7 RED SPRUCE–FRASER FIR FOREST (RHODODENDRON SUBTYPE) ........................................ 8 RED SPRUCE–FRASER FIR FOREST (BOULDERFIELD SUBTYPE)............................................ 8 RED SPRUCE–FRASER FIR FOREST (BIRCH TRANSITION HERB SUBTYPE) ......................... 8 RED SPRUCE–FRASER FIR FOREST (BIRCH TRANSITION SHRUB SUBTYPE) ...................... 9 RED SPRUCE–FRASER FIR FOREST (LOW RHODODENDRON SUBTYPE) .............................. 9 Grass and Heath Balds .............................................................................................................................. 10 GRASSY BALD (GRASS SUBTYPE)................................................................................................ 10 GRASSY BALD (SEDGE SUBTYPE ................................................................................................. 10 GRASSY BALD (ALDER SUBTYPE) ............................................................................................... 11 HEATH BALD (CATAWBA RHODODENDRON SUBTYPE) ........................................................ 11 HEATH BALD (CAROLINA RHODODENDRON SUBTYPE) ....................................................... 12 HEATH BALD (SOUTHERN MIXED SUBTYPE) ........................................................................... 12 HEATH BALD (SLATE SUBTYPE) .................................................................................................. 13 HEATH BALD (SAND MYRTLE SUBTYPE) .................................................................................. 13 HEATH BALD (LOW ELEVATION SUBTYPE) .............................................................................. 13 Northern Hardwood Forests ...................................................................................................................... 14 NORTHERN HARDWOOD FOREST (TYPIC SUBTYPE) .............................................................. 14 NORTHERN HARDWOOD FOREST (RICH SUBTYPE) ................................................................ 14 NORTHERN HARDWOOD FOREST (BEECH GAP SUBTYPE).................................................... 15 HIGH ELEVATION BIRCH BOULDERFIELD FOREST................................................................. 15 Mountain Cove Forests ............................................................................................................................. 16 RICH COVE FOREST (MONTANE INTERMEDIATE SUBTYPE) ................................................ 16 RICH COVE FOREST (MONTANE RICH SUBTYPE) .................................................................... 17 RICH COVE FOREST (FOOTHILLS INTERMEDIATE SUBTYPE) .............................................. 18 RICH COVE FOREST (FOOTHILLS RICH SUBTYPE) .................................................................. 18 RICH COVE FOREST (RED OAK SUBTYPE) ................................................................................. 18 RICH COVE FOREST (BOULDERFIELD SUBTYPE)..................................................................... 19 ACIDIC COVE FOREST (TYPIC SUBTYPE) ................................................................................... 20 ACIDIC COVE FOREST (HIGH ELEVATION SUBTYPE) ............................................................. 21 ACIDIC COVE FOREST (SILVERBELL SUBTYPE)....................................................................... 21 CANADA HEMLOCK FOREST (TYPIC SUBTYPE) ....................................................................... 22 CANADA HEMLOCK FOREST (WHITE PINE SUBTYPE)............................................................ 22 Piedmont and Coastal Plain Mesic Forests ............................................................................................... 23 MESIC MIXED HARDWOOD FOREST (PIEDMONT SUBTYPE) ................................................ 23 MESIC MIXED HARDWOOD FOREST (COASTAL PLAIN SUBTYPE) ...................................... 24 BASIC MESIC FOREST (PIEDMONT SUBTYPE)........................................................................... 25 BASIC MESIC FOREST (COASTAL PLAIN SUBTYPE) ................................................................ 26 PIEDMONT/COASTAL PLAIN HEATH BLUFF ............................................................................. 27 CAPE FEAR VALLEY MIXED BLUFF FOREST ............................................................................. 28 Mountain Dry Coniferous Woodlands ...................................................................................................... 28 PINE–OAK / HEATH (TYPIC SUBTYPE) ........................................................................................ 28 PINE–OAK / HEATH (HIGH ELEVATION SUBTYPE) .................................................................. 29 CAROLINA HEMLOCK FOREST (TYPIC SUBTYPE) ................................................................... 29 CAROLINA HEMLOCK FOREST (PINE SUBTYPE) ...................................................................... 30 CAROLINA HEMLOCK FOREST (MESIC SUBTYPE)................................................................... 30 WHITE PINE FOREST ........................................................................................................................ 31 LOW MOUNTAIN PINE FOREST (SHORTLEAF PINE SUBTYPE) ............................................. 31 LOW MOUNTAIN PINE FOREST (MONTANE PINE SUBTYPE)................................................. 31 SOUTHERN MOUNTAIN PINE–OAK FOREST .............................................................................. 32 SOUTHERN MOUNTAIN XERIC PINE–OAK WOODLAND ........................................................ 32 Mountain Oak Forests ............................................................................................................................... 33 HIGH ELEVATION RED OAK FOREST (TYPIC HERB SUBTYPE) ............................................. 33 HIGH ELEVATION RED OAK FOREST (RICH SUBTYPE) .......................................................... 33 HIGH ELEVATION RED OAK FOREST (HEATH SUBTYPE) ...................................................... 34 HIGH ELEVATION RED OAK FOREST (ORCHARD FOREST SUBTYPE) ................................ 35 HIGH ELEVATION RED OAK FOREST (STUNTED WOODLAND SUBTYPE) ......................... 35 HIGH ELEVATION WHITE OAK FOREST ..................................................................................... 35 CHESTNUT OAK FOREST (DRY HEATH SUBTYPE) ................................................................... 36 CHESTNUT OAK FOREST (HERB SUBTYPE) ............................................................................... 37 CHESTNUT OAK FOREST (WHITE PINE SUBTYPE) ................................................................... 37 CHESTNUT OAK FOREST (MESIC SUBTYPE) ............................................................................. 38 MONTANE OAK–HICKORY FOREST (ACIDIC SUBTYPE) ........................................................ 39 MONTANE OAK–HICKORY FOREST (BASIC SUBTYPE) .......................................................... 39 MONTANE OAK–HICKORY FOREST (LOW DRY SUBTYPE) .................................................... 40 MONTANE OAK–HICKORY FOREST (WHITE PINE SUBTYPE)................................................ 40 LOW MONTANE RED OAK FOREST .............................................................................................. 41 CALCAREOUS OAK–WALNUT FOREST ....................................................................................... 41 MONTANE GRAPE OPENING .......................................................................................................... 42 Piedmont and Coastal Plain Oak Forests .................................................................................................. 42 DRY-MESIC OAK–HICKORY FOREST (PIEDMONT SUBTYPE) ................................................ 42 DRY-MESIC OAK-HICKORY FOREST (COASTAL PLAIN SUBTYPE) ...................................... 43 DRY OAK–HICKORY FOREST (PIEDMONT SUBTYPE) ............................................................. 44 DRY OAK–HICKORY FOREST (COASTAL