Acidic Shrub Fen

Description: pond arrowweed 4.jpe Description: white cedar 5.jpe

Photos: salicicola.com

 

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Overview

Shrub-dominated acidic peatlands characterized by a mixture of primarily deciduous shrubs.

 

Acidic shrub fens experience some groundwater and /or surface water flow but not calcareous seepage. Acidic shrub fens are less acidic and nutrient-poor than level bogs; they appear to have more surface water inflow and some groundwater connectivity. Acidic shrub fens are typically found along wet pond margins in the eastern half of the state, but they also characterize many wet pond margins in northern Worcester County [e.g., Cheshire and Lincoln Ponds, Ashburnham] and the Berkshires [Horseshoe-Mud Pond Bog, Otis]. More information is needed to identify the physical, geochemical, or hydrological differences between acidic shrub fens and acidic graminoid fens.

 

Photos credit to salicicola.com (unless otherwise noted). Natural communities information extracted from the Massachusetts Division of Fisheries and Wildlife Natural Heritage and Endangered Species Program (NHESP). NHESP's Acidic Shrub Fen natural community page.

 

SEMPBA Archives: Acidic Shrub Fen

 

Species Name

sphagnum moss

leatherleaf (Chamaedaphne calyculata)

water-willow (Decodon verticillatus)

sweet-gale (Myrica gale)

meadow-sweet (Spiraea alba var. latifolia)

sweet-pepperbush (Clethra alnifolia)

highbush blueberry (Vaccinium corymbosum)

gray alder (Alnus incana)

smooth alder (Alnus serrulata)

red maple (Acer rubrum)

northern St. John's-wort (Hypericum boreale)

Canadian St. John’s-wort (Hypericum canadense)

pale St. John’s-wort (Hypericum ellipticum)

acid-water arrowhead (Sagittaria engelmanniana)
common arrowhead (Sagittaria latifolia)

cotton-grasses (Eriophorum spp.)

broom sedge (Carex scoparia)
awl-fruited sedge (Carex stipata)

white beak-rush (Rhynchospora alba)

sooty beak-rush (Rhynchospora fusca)

 

sphagnum mosss--Sphagnum beneath Sceuschzeria palustris.
sphagnum mosss--Sphagnum beneath Sceuschzeria palustris.
sphagnum mosss--Sphagnum beneath Vaccinninum macrocarpon.
Description: leatherleaf 5.jpe leatherleaf (Chamaedaphne calyculata)
Description: leatherleaf 1.jpe

leatherleaf (Chamaedaphne calyculata)

Description: leatherleaf 4.jpe leatherleaf (Chamaedaphne calyculata)
Description: waterwillow 4.jpg water-willow (Decodon verticillatus)
Description: waterwillow 3.jpe water-willow (Decodon verticillatus)
Description: waterwillow 1.jpe water-willow (Decodon verticillatus)
Description: sweet gale 4.jpe sweet-gale (Myrica gale)
Description: sweet gale 2.jpe sweet-gale (Myrica gale)
Description: sweet gale 5.jpe sweet-gale (Myrica gale)
Description: sweet gale 6.jpe sweet-gale (Myrica gale)
Description: meadowsweet 3.jpe meadow-sweet (Spiraea alba var. latifolia)
Description: meadowsweet 6.jpg meadow-sweet (Spiraea alba var. latifolia)
Description: meadowsweet 1.jpg

meadow-sweet (Spiraea alba var. latifolia)

Description: pepperbush 4.jpe sweet-pepperbush (Clethra alnifolia)
Description: pepperbush 1.jpe sweet pepperbush (Clethra alnifolia)
Description: pepperbush 2.jpg sweet pepperbush (Clethra alnifolia)
highbush blueberry (Vaccinium corymbosum)
highbush blueberry (Vaccinium corymbosum)
highbush blueberry (Vaccinium corymbosum)
highbush blueberry (Vaccinium corymbosum)

gray alder (Alnus incana)

By Quadell - inmygarden, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=59826

smooth alder (Alnus serrulata)
smooth alder (Alnus serrulata)
smooth alder (Alnus serrulata)
smooth alder (Alnus serrulata)
Description: Copy of red maple 2.jpe red maple (Acer rubrum)
Description: Copy of red maple 4.jpe red maple (Acer rubrum)
Description: Copy of red maple 5.jpg red maple (Acer rubrum)
Description: northern st johnswort 3.jpe northern St. John's-wort (Hypericum boreale)
Description: northern st johnswort 2.jpe northern St. John's-wort (Hypericum boreale)
Description: northern st johnswort 1.jpe northern St. John's-wort (Hypericum boreale)
Description: canadian st johnswort 2.jpe Canadian St. JohnÕs-wort (Hypericum canadense)
Description: canadian st johnswort 3.jpe Canadian St. JohnÕs-wort (Hypericum canadense)
Description: canadian st johnswort 1.jpe Canadian St. JohnÕs-wort (Hypericum canadense)
Description: pale st johnswort 4.jpe pale St. JohnÕs-wort (Hypericum ellipticum)
Description: pale st johnswort 3.jpe

pale St. JohnÕs-wort (Hypericum ellipticum)

Description: pale st johnswort 1.jpe pale St. JohnÕs-wort (Hypericum ellipticum)
Description: pale st johnswort 2.jpe pale St. JohnÕs-wort (Hypericum ellipticum)
Description: acid arrowweed 1.jpe acid-water arrowhead (Sagittaria engelmanniana)
Description: acid arrowweed 2.jpe acid-water arrowhead (Sagittaria engelmanniana)
Description: common arrowweed 6.jpg common arrowhead (Sagittaria latifolia)
Description: common arrowweed 3.jpe common arrowhead (Sagittaria latifolia)
Description: common arrowweed 5.jpe common arrowhead (Sagittaria latifolia)
Description: common arrowweed 4.jpe common arrowhead (Sagittaria latifolia)
cotton-grasses (Eriophorum virginicum)
cotton-grasses (Eriophorum virginicum)
cotton-grasses (Eriophorum virginicum)
cotton-grasses (Eriophorum virginicum)
broom sedge (Carex scoparia)
broom sedge (Carex scoparia)
broom sedge (Carex scoparia)
broom sedge (Carex scoparia)
awl-fruited sedge (Carex stipata)
awl-fruited sedge (Carex stipata)
awl-fruited sedge (Carex stipata)
awl-fruited sedge (Carex stipata)
white beak-rush (Rhynchospora alba)
white beak-rush (Rhynchospora alba)
white beak-rush (Rhynchospora alba)
white beak-rush (Rhynchospora alba)
sooty beak-rush (Rhynchospora fusca)
sooty beak-rush (Rhynchospora fusca)
sooty beak-rush (Rhynchospora fusca)