DISTRIBUTION AND OCCURRENCE
SPECIES: Alnus viridis ssp. crispa | American Green Alder 



GENERAL DISTRIBUTION : 
American green alder is widely distributed throughout interior, central,
and northern Alaska across the Yukon Territory and interior Canada to
Labrador, Newfoundland, and Greenland.  It extends south through New
England and the Great Lakes States, and into the Pacific Northwest.
Disjunct populations are documented in south-central Pennsylvania and
west-central North Carolina [21,36,48,58].


ECOSYSTEMS : 
   FRES10  White - red - jack pine
   FRES11  Spruce - fir
   FRES15  Oak - hickory
   FRES17  Elm - ash - cottonwood
   FRES18  Maple - beech - birch
   FRES19  Aspen - birch
   FRES20  Douglas-fir
   FRES22  Western white pine
   FRES23  Fir - spruce
   FRES24  Hemlock - Sitka spruce
   FRES26  Lodgepole pine
   FRES28  Western hardwoods


STATES : 
     AK  CA  ME  MA  MI  MN  NH  NY  NC  OR
     PA  VT  WA  WI  AB  BC  LB  MB  NB  NF
     NT  NS  ON  PQ  SK  YT


ADMINISTRATIVE UNITS : 
     ACAD  APIS  DENA  GLBA  ISRO  LACL
     PIRO  VOYA  WRST  YUCH


BLM PHYSIOGRAPHIC REGIONS : 
   1  Northern Pacific Border
   2  Cascade Mountains


KUCHLER PLANT ASSOCIATIONS : 
   K001  Spruce - cedar - hemlock forest
   K002  Cedar - hemlock - Douglas-fir forest
   K003  Silver fir - Douglas-fir forest
   K004  Fir - hemlock forest
   K008  Lodgepole pine - subalpine forest
   K012  Douglas-fir forest
   K013  Cedar - hemlock - pine forest
   K015  Western spruce - fir forest
   K025  Alder - ash forest
   K081  Oak savanna
   K093  Great Lakes spruce - fir forest
   K094  Conifer bog
   K095  Great Lakes pine forest
   K096  Northeastern spruce - fir forest
   K099  Maple - basswood forest
   K101  Elm - ash forest
   K102  Beech - maple forest
   K106  Northern hardwoods
   K107  Northern hardwoods - fir forest
   K108  Northern hardwoods - spruce forest


SAF COVER TYPES : 
     1  Jack pine
     5  Balsam fir
    12  Black spruce
    13  Black spruce - tamarack
    14  Northern pin oak
    15  Red pine
    16  Aspen
    17  Pin cherry
    18  Paper birch
    21  Eastern white pine
    22  White pine - hemlock
    23  Eastern hemlock
    24  Hemlock - yellow birch
    25  Sugar maple - beech - yellow birch
    26  Sugar maple - basswood
    27  Sugar maple
    30  Red spruce - yellow birch
    31  Red spruce - sugar maple - beech
    32  Red spruce
    33  Red spruce - balsam fir
    35  Paper birch - red spruce - balsam fir
    37  Northern white-cedar
    38  Tamarack
    39  Black ash - American elm - red maple
    60  Beech - Sugar maple
    62  Silver maple - American elm
   107  White spruce
   108  Red maple
   201  White spruce
   202  White spruce - paper birch
   203  Balsam poplar
   204  Black spruce
   205  Mountain hemlock
   206  Engelmann spruce - subalpine fir
   207  Red fir
   210  Interior Douglas-fir
   215  Western white pine
   217  Aspen
   218  Lodgepole pine
   221  Red alder
   222  Black cottonwood - willow
   223  Sitka spruce
   224  Western hemlock
   225  Western hemklock - Sitka spruce
   226  Coastal true fir - hemlock
   227  Western redcedar - western hemlock
   228  Western redcedar
   229  Pacific Douglas-fir
   230  Douglas-fir - western hemlock
   251  White spruce - aspen
   252  Paper birch
   253  Black spruce - white spruce
   254  Black spruce - paper birch


SRM (RANGELAND) COVER TYPES : 
NO-ENTRY


HABITAT TYPES AND PLANT COMMUNITIES : 
American green alder is a dominant or codominant in a variety of
habitats.  It may occur as an understory dominant in open conifer
forests with black spruce (Picea mariana), white spruce (P.  glauca),
lodgepole pine (Pinus contorta), and jack pine (P. banksiana)
overstories; and in open and closed deciduous forests with paper birch
(Betula papyrifera), quaking aspen (Populus tremuloides), balsam poplar
(P. balsamifera), and red alder (Alnus rubra) overstories.  American
green alder can dominate in shrub types (often with Salix spp.) and on
open, moist tundra [5,13,20,55,57].

The following publications classify American green alder as a dominant
shrub layer component:

Forest community types of west-central Alberta in relation to selected
  environmental factors [13]
Field guide to forest ecosystems of west-central Alberta [14]
Classification, description, and dynamics of plant communities after
  fire in the taiga of interior Alaska [20]
Vegetation types in northwestern Alaska and comparisons with communities
  in other Arctic regions [23]
Reconnaissance of vegetation and soils along the Dempster Highway, Yukon
 Territory: I. Vegetation types [49]
The Alaska vegetation classification [57]

Related categories for Species: Alnus viridis ssp. crispa | American Green Alder