Print Report

CEGL006524 Carex (oligosperma, exilis) - Chamaedaphne calyculata Shrub Acidic Peatland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: (Few-seed Sedge, Coastal Sedge) - Leatherleaf Shrub Acidic Peatland

Colloquial Name: Few-seed Sedge - Leatherleaf Fen

Hierarchy Level:  Association

Type Concept: This association forms sedge-shrub lawns in weakly minerotrophic peatlands of northern New England and adjacent Canada. It occurs on wet flats and peat-accumulating depressions at low to moderate elevations, generally over acidic bedrock or till. The peat substrate is constantly saturated, and pH is usually in the 4.0-5.4 range. The vegetation is dominated by an expanse of low to mid-sized sedges mixed with dwarf ericad shrubs, with sedges usually more abundant. Trees and tall shrubs are sparse or absent. The bryophyte layer is continuous. Chamaedaphne calyculata and Andromeda polifolia var. glaucophylla are the most typical dwarf-shrubs, and are often overtopped by the sedges. Other shrubs include Kalmia polifolia, Kalmia angustifolia, Myrica gale, Ilex mucronata, Vaccinium oxycoccos, Vaccinium macrocarpon, and (occasionally, northward) Betula pumila. Graminoid species include Carex oligosperma, Carex exilis, Carex michauxiana, Carex utriculata, Carex chordorrhiza, Eriophorum spp. (most typically Eriophorum angustifolium), Rhynchospora alba, Trichophorum cespitosum, and Scheuchzeria palustris. Other herbaceous associates include Solidago nemoralis, Oclemena nemoralis, Drosera intermedia, Drosera rotundifolia, Pogonia ophioglossoides, and Maianthemum trifolium. The bryophyte layer is characterized by a mixture of species, with characteristic peatmosses including Sphagnum angustifolium, Sphagnum fallax, Sphagnum magellanicum, Sphagnum papillosum, Sphagnum pulchrum, Sphagnum recurvum, and Sphagnum rubellum. This association is differentiated from ~Chamaedaphne calyculata / Eriophorum virginicum / Sphagnum rubellum Acidic Peatland (CEGL006513)$$, which can be floristically similar, by the increased cover of sedges and decreased cover of shrubs.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: Comparison of this type (CEGL006524), described from the Northeast, and ~Carex oligosperma - Carex pauciflora - Eriophorum vaginatum / Sphagnum spp. Acidic Peatland (CEGL005256)$$, described from the Midwest, along with information from adjacent Canada, is needed to determine if they should remain separate types.

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: The vegetation is dominated by an expanse of low to mid-sized sedges mixed with dwarf ericad shrubs, with sedges usually more abundant. Trees and tall shrubs are sparse or absent. The bryophyte layer is continuous. Chamaedaphne calyculata and Andromeda polifolia var. glaucophylla (= Andromeda glaucophylla) are the most typical dwarf-shrubs, and are often overtopped by the sedges. Other shrubs include Kalmia polifolia, Kalmia angustifolia, Myrica gale, Ilex mucronata (= Nemopanthus mucronatus), Vaccinium oxycoccos, Vaccinium macrocarpon, and (occasionally, northward) Betula pumila. Graminoid species include Carex oligosperma, Carex exilis, Carex michauxiana, Carex utriculata, Carex chordorrhiza, Eriophorum spp. (most typically Eriophorum angustifolium), Rhynchospora alba, Trichophorum cespitosum (= Scirpus cespitosus), and Scheuchzeria palustris. Other herbaceous associates include Solidago nemoralis, Oclemena nemoralis (= Aster nemoralis), Drosera intermedia, Drosera rotundifolia, Pogonia ophioglossoides, and Maianthemum trifolium (= Smilacina trifolia). The bryophyte layer is characterized by a mixture of species, with characteristic peatmosses including Sphagnum angustifolium, Sphagnum fallax, Sphagnum magellanicum, Sphagnum papillosum, Sphagnum pulchrum, Sphagnum recurvum, and Sphagnum rubellum.

Dynamics:  No Data Available

Environmental Description:  This association forms sedge-shrub lawns in weakly minerotrophic peatlands of northern New England and adjacent Canada. It occurs on wet flats and peat-accumulating depressions at low to moderate elevations, generally over acidic bedrock or till. The peat substrate is constantly saturated, and pH is usually in the 4.0-5.4 range.

Geographic Range: This weakly minerotrophic peatland occurs in northern New England.

Nations: CA,US

States/Provinces:  ME, NH, NY, QC?, VT




Confidence Level: Low

Confidence Level Comments: No Data Available

Grank: GNR

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: = Carex oligosperma - Chamaedaphne calyculata sedge - shrub heath / moss lawn (Types 5 and 7) (Anderson and Davis 1997)
< Extremely poor fen (Damman and French 1987)

Concept Author(s): S.C. Gawler

Author of Description: S.C. Gawler

Acknowledgements: No Data Available

Version Date: 01-28-03

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