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Ecology of Red Maple Swamps in the Glaciated Northeast: A ...

Ecology of Red Maple Swamps in the Glaciated Northeast: A ...

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on Long Island, p<strong>in</strong> oak, swamp white a&, white<br />

oak (Quercus alba), and nor<strong>the</strong>rn red oak (Q.<br />

rubra) occur locally <strong>in</strong> red maple swaps. Less<br />

comrnon hardwood associates <strong>in</strong> <strong>the</strong> sou<strong>the</strong>rn section<br />

<strong>of</strong> zone I <strong>in</strong>clude serviceberry (Amektnchkr<br />

spp.), black cherry (Pmnus serottna), blue-beech<br />

(Calp<strong>in</strong>us cnrol<strong>in</strong>iam), yellow-popltur (Liridndron<br />

tulipifera), and basswood (Tilia americana).<br />

Atlantic white cedar is a common associate <strong>of</strong><br />

red maple <strong>in</strong> coastal areas from New Jersey to<br />

sou<strong>the</strong>rn Ma<strong>in</strong>e (Lademan 1989). This species<br />

typically occurs <strong>in</strong> pure stands on sites that are<br />

slightly wetter than most <strong>of</strong> those support<strong>in</strong>g red<br />

maple (Reynolds et al. 1982; Lowry 1984). However,<br />

cedar logg<strong>in</strong>g and water level changes have<br />

made mixed stands <strong>of</strong> red maple and Atlantic<br />

white cedar common <strong>in</strong> zone I. White p<strong>in</strong>e is a<br />

comrnon associate <strong>of</strong> red maple <strong>in</strong> many zone I<br />

swamps; <strong>in</strong> parts <strong>of</strong> sou<strong>the</strong>astern New England<br />

<strong>the</strong>se species may be codom<strong>in</strong>ant wirier 1989b).<br />

Black spruce is common irz <strong>the</strong> ~ior<strong>the</strong>rn portion <strong>of</strong><br />

zone I, but, ;also associrttes with red maple <strong>in</strong> sou<strong>the</strong>rn<br />

areas, typIc~ilIy along <strong>the</strong> xllarg<strong>in</strong>s <strong>of</strong> bogs<br />

(Danxman and French 1987).<br />

Gray birch (EJtttula populifolicr), black ash, bal-<br />

sam fir, and ~mr<strong>the</strong>nl white cedar cornnlonly occur<br />

<strong>in</strong> red maple swcunps <strong>in</strong> <strong>the</strong> sou<strong>the</strong>rn parts <strong>of</strong> New<br />

ZIampshire, Vcbnxiont., and Ma<strong>in</strong>e. The Vermont<br />

Natural. EIeritage Progr:~rn (Thompson 1988) has<br />

described <strong>the</strong> black gunk swamp, corriposed <strong>of</strong><br />

black gum, hemlock, rmd red maple, as a rare<br />

association r~stricted to thc soti<strong>the</strong>astern part <strong>of</strong><br />

that state. Vlis associatio~l has also been de-<br />

@cribed In Vermont by Fouberg and Blunt (1970),<br />

and ixl &w Ehnpsliire by Baldw<strong>in</strong> (]%I). Oaks<br />

less common <strong>in</strong> red rlxaple swamps from <strong>the</strong><br />

nor<strong>the</strong>rn section <strong>of</strong> zone I; nor<strong>the</strong>rn red oak is <strong>the</strong><br />

rnost eomlon spcies <strong>in</strong> that area.<br />

Fewer tharx a dozen species dom<strong>in</strong>ate <strong>the</strong> shrub<br />

layer <strong>of</strong> red mapie swnnlps <strong>in</strong> zone 1. I-Iighbush<br />

blueberry, con<strong>in</strong>lon w<strong>in</strong>terberry, sweet pepperbush,<br />

spicebush, swaxnp azalea (Rhodo$Fndron<br />

~ILSCOSUI~~), nortJzern arrow-wood, sou<strong>the</strong>rn arrowwood<br />

(Viburnum d~?ntntu~r?), speckled alder, nannyberv<br />

(V kentaga), and poison sumac (Toxicdndron<br />

uernix) are <strong>the</strong> most common shrubs;<br />

greenbriers also are common, especially <strong>in</strong> sou<strong>the</strong>rn<br />

New England (Table 3.3). O<strong>the</strong>r common species<br />

<strong>in</strong>clude fetterbush (Leucothoe racemosa),<br />

maleberry (Lpriia l@str<strong>in</strong>a), chokeberries<br />

(Aronia spp.), swamp rose (Rosa pnlustris), mounta<strong>in</strong><br />

holly (Nernomnthus mucronczta), wi<strong>the</strong>rad<br />

(%burnun wss<strong>in</strong>oides), poison ivy, European<br />

buckthorn (Rhamnus franguh), mounta<strong>in</strong> laurel,<br />

sheep laurel, and American witch-hazel (Hamamelis<br />

virg<strong>in</strong>iana). Sweet pepperbush and swamp<br />

azalea are most common east <strong>of</strong> <strong>the</strong> Connecticut<br />

River, <strong>in</strong> <strong>the</strong> sou<strong>the</strong>rn section <strong>of</strong> zone I. Great<br />

rhododendron occurs locally from sou<strong>the</strong>rn New<br />

England southward. Mounta<strong>in</strong> holly, speckled alder,<br />

hobblebush (Viburnum lantanoides), American<br />

yew, and striped maple (Acer pensylvanicum)<br />

are more important <strong>in</strong> red maple swamps <strong>in</strong> <strong>the</strong><br />

nor<strong>the</strong>rn section <strong>of</strong> zone I.<br />

Species composition <strong>in</strong> <strong>the</strong> herb layer is more<br />

variable than <strong>in</strong> <strong>the</strong> tree or shrub layers <strong>of</strong> red<br />

maple swamps. Some common constituents are<br />

listed below, but <strong>the</strong>se species do not necessarily<br />

associate with each o<strong>the</strong>r, nor do <strong>the</strong>y all occur<br />

throughout zone I.<br />

C<strong>in</strong>namon fern is <strong>the</strong> most common fern <strong>in</strong><br />

zone I red maple swamps (see Fig. 3.9). Sensitive<br />

fern (Onoclea sensibilis), royal fern (Osmundu<br />

regalis), marsh fern (Thelypteris thlypteroides),<br />

and sp<strong>in</strong>ulose woodfern (Dryopteris sp<strong>in</strong>ubsa) are<br />

o<strong>the</strong>r species that are commonly found throughout<br />

this zone (Table 3.3). Locally common species<br />

<strong>in</strong>clude Virg<strong>in</strong>ia cha<strong>in</strong>-fern (Woodwardia virg<strong>in</strong>ica),<br />

netted cha<strong>in</strong>-fern (W. areohta), <strong>in</strong>terrupted<br />

fern (Osmundu claytoniana), Massachusetts<br />

fern (Thelypteris simulata), New York fern<br />

(T. noveboracensis), and ostrich fern (Matteuccia<br />

struthiopteris).<br />

Gram<strong>in</strong>oid plants from zone I red maple<br />

swamps commonly <strong>in</strong>clude sedges (e.g., Carex<br />

stricta, C. lacustris, C. bnchocarpa, C. cr<strong>in</strong>ita)<br />

and grasses such as bluejo<strong>in</strong>t grass (Cahmagrostis<br />

canadensis) and manna grass (Glyceria<br />

spp.). Skunk cabbage (SympEautrpus foetidus),<br />

false hellebore (Veratrum viride), marsh marigold<br />

(Caltha palustris), spotted touch-me-not (Impatiens<br />

capensis), wild lily-<strong>of</strong>-<strong>the</strong>-valley (Maian<strong>the</strong>mum<br />

canad.en.se), violets (Viola spp.), wild sarsaparilla<br />

(Aralia nudicaulis), blue flag (Iris<br />

uersicolor), bugleweeds (Lycopus spp.), starflower<br />

(Trierztalis borealis), and goldthread (Coptk trifolia)<br />

are common forbs. Because <strong>of</strong> <strong>the</strong>ir low stature,<br />

trail<strong>in</strong>g shrubs are listed with <strong>the</strong> forbs <strong>in</strong><br />

Table 3.3; swamp dewberry (Rubus hkpidus), teaberry<br />

(Gaul<strong>the</strong>ria procumbens), and partridgeberry<br />

(Mtchella repens) are three <strong>of</strong> <strong>the</strong> most<br />

comrnon species <strong>in</strong> zone I red maple swamps.<br />

Mosses represent an important component <strong>of</strong><br />

<strong>the</strong> flora <strong>in</strong> many red maple swamps. S<strong>in</strong>ce few<br />

studies describe any but <strong>the</strong> most common genera<br />

and species, however, a comprehensive list<strong>in</strong>g <strong>of</strong>

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