Print Report
CEGL006307 Chamaecyparis thyoides / Alnus maritima ssp. maritima Swamp Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Atlantic White-cedar / Seaside Alder Swamp Woodland
Colloquial Name: Atlantic White-cedar / Seaside Alder Swamp Woodland
Hierarchy Level: Association
Type Concept: This open-canopy Atlantic white-cedar swamp occurs along streams of the Delmarva peninsula. It is also found in artificial mill ponds. The substrate is peat and muck characterized by hummock-and-hollow microtopography. The tree canopy is characterized by low-stature Chamaecyparis thyoides in association with Pinus taeda. Other woody associates include Alnus maritima ssp. maritima, Morella cerifera, Ilex glabra, and Clethra alnifolia. The herbaceous layer is composed of Decodon verticillatus, Peltandra virginica, Nymphaea odorata, Carex exilis, Dichanthelium dichotomum, Oxypolis rigidior, Triadenum virginicum, Dulichium arundinaceum, Glyceria obtusa, Rhynchospora alba, Carex atlantica, Selaginella apoda, Drosera rotundifolia, Juncus militaris, Vaccinium macrocarpon, Calopogon tuberosus, and Eriocaulon decangulare. Floating mats within mill ponds have a unique species assemblage including Xyris difformis, Fuirena spp., Hypericum mutilum, Juncus pelocarpus, Juncus canadensis, Fimbristylis sp., and Rhynchospora macrostachya.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: No Data Available
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: The tree canopy is characterized by low-stature Chamaecyparis thyoides in association with Pinus taeda. Other woody associates include Alnus maritima ssp. maritima, Morella cerifera (= Myrica cerifera), Ilex glabra, and Clethra alnifolia. The herbaceous layer is composed of Decodon verticillatus, Peltandra virginica, Nymphaea odorata, Carex exilis, Dichanthelium dichotomum, Oxypolis rigidior, Triadenum virginicum, Dulichium arundinaceum, Glyceria obtusa, Rhynchospora alba, Carex atlantica, Selaginella apoda, Drosera rotundifolia, Juncus militaris, Vaccinium macrocarpon, Calopogon tuberosus, and Eriocaulon decangulare. Floating mats within mill ponds have a unique species assemblage, including Xyris difformis, Fuirena spp., Hypericum mutilum, Juncus pelocarpus, Juncus canadensis, Fimbristylis sp., and Rhynchospora macrostachya.
Dynamics: These communities were apparently once cedar swamp streams now filling in with peat substrate, herbs, and Alnus maritima.
Environmental Description: This open-canopy Atlantic white-cedar swamp occurs along streams of the Delmarva peninsula. It is also found in artificial mill ponds. The substrate is peat and muck characterized by hummock-and-hollow microtopography.
Geographic Range: This swamp type occurs along streams of the Delmarva peninsula.
Nations: US
States/Provinces: DE, MD
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.685928
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: GNR
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 1 Forest & Woodland Class | C01 | 1 |
| Subclass | 1.B Temperate & Boreal Forest & Woodland Subclass | S15 | 1.B |
| Formation | 1.B.3 Temperate Flooded & Swamp Forest Formation | F026 | 1.B.3 |
| Division | 1.B.3.Nb Southeastern North American Flooded & Swamp Forest Division | D062 | 1.B.3.Nb |
| Macrogroup | 1.B.3.Nb.3 Sweetbay - Swamp Bay - Pond Pine Swamp Forest Macrogroup | M032 | 1.B.3.Nb.3 |
| Group | 1.B.3.Nb.3.b Atlantic White-cedar - Pitch Pine Swamp Group | G039 | 1.B.3.Nb.3.b |
| Alliance | A3415 Atlantic White-cedar Mid-Atlantic Streamside Swamp Forest Alliance | A3415 | 1.B.3.Nb.3.b |
| Association | CEGL006307 Atlantic White-cedar / Seaside Alder Swamp Woodland | CEGL006307 | 1.B.3.Nb.3.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: No Data Available
- Clancy, K. 1996. Natural communities of Delaware. Unpublished review draft. Delaware Natural Heritage Program, Division of Fish and Wildlife, Delaware Division of Natural Resources and Environmental Control, Smyrna, DE. 52 pp.
- Coxe, R. 2009. Guide to Delaware vegetation communities. Spring 2009 edition. State of Delaware, Division of Fish and Wildlife, Delaware Natural Heritage Program, Smyrna.
- Eastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boston, MA.
- Harrison, J. W. 2011. The natural communities of Maryland: 2011 working list of ecological community groups and community types. Unpublished report. Maryland Department of Natural Resources, Wildlife and Heritage Service, Natural Heritage Program, Annapolis. 33 pp.
- Harrison, J. W., compiler. 2004. Classification of vegetation communities of Maryland: First iteration. A subset of the International Classification of Ecological Communities: Terrestrial Vegetation of the United States, NatureServe. Maryland Natural Heritage Program, Maryland Department of Natural Resources, Annapolis. 243 pp.
- Schrader, J. A., and W. R. Graves. 2002. Infraspecific systematics of Alnus maritima (Betulaceae) from three widely disjunct provenances. Castanea 67:380-401.