"Aggressive monoculture;" "monotypic
stands;" "invasive weed;" "degraded
wetland;" these are among the common phrases(without
expletives) used to describe, and then dismiss,
phragmites(common reed). One hears reed wetlands described as
barren, unproductive, not as good as other wetland types, worthy
of eradication and replacement with something better, often
without prior inventory. This observer quarrels with that
simplistic view, and offers an apologia for reed based on 28
years of conservation advocacy work, helicopter surveys and
censuses, numerous field trips to all parts of New Jersey, and
habitat inventories of river systems rife with reed.(For a
discussion of phrag natural history, see NJA,spring 96).
Discussions about reed and decisions to mitigate, eradicate
and replace reed are frequently clouded by value judgments and
prior assumptions shared by regulators, land managers,
consultants and some biologists. The starting point is often the
broad-brush notion that spartina is "better" than
reed, for example. Actually, spartina is different, not
necessarily better. "Better" is a loaded word. A given
spartina marsh might be more "productive" than a given
phrag marsh, but the reverse may also be true, and the only way
to make that judgment is case by case inventory.
Complicating the judgment is another assumption that
restoring a wetland to "how it used to be" always is
better or desirable or necessary. It may be, but longterm, maybe
not. Wetlands are dynamic, not static. They change over time.
The Hackensack Meadows went from cedar swamp to emergent marsh.
Diking, ditching, roads, utility lines and the like currently
favor phragmites, but the rise in sea level suggests that some
of today's reed marshes will in time revert to spartina. Some
early evidence of that can be seen in the Hackensack
Meadowlands.
Another major concern of Audubon's is that the values and
functions of phrag are less well understood than those of other
wetland types. That lack of awareness leads to a conditioned
reflex that phragmites removal is the preferred alternative.
Actually, reed marshes can be very valuable bird habitats. A
classic example is the Kearny Marsh in the Hackensack
Meadowlands where the diversity of wetland nesting species was
found to be extraordinary(see Birds of the Kearny Marsh, NJA
Supplement(now Records of NJ Birds), Vol. iv, no. 5, winter
1978). The roster includes Pied-billed Grebe, both night-herons,
American and Least bitterns, Green Heron, coot, Common Moorhen;
8 species of waterfowl(at least, including New Jersey-rare
Green-winged Teal and Ruddy Duck) King and Virginia rails,
grackles, redwings, Swamp Sparrow, Marsh Wren, Common
Yellowthroat, Yellow Warbler, and Willow Flycatcher(an article
is in press from this author documenting all the bird species
nesting in reed in New Jersey). Note that a number of the above
species are listed species in New Jersey, which suggests that
reed is perhaps important to the survival of local populations.
Other marshes besides Kearny have important avian breeding
populations, both in the Meadowlands and elsewhere in the state.
Other Hackensack Meadowlands reed marshes include Kingsland
impoundment(coot, Ruddy Duck, Kingsland Creek marshes(Yellow-crowned
Night-Heron); Pied-billed Grebe, Com. Mooorhen among others;
Berry's Creek(N. Harrier, Am. Bittern, Clapper Rail); Mill
Creek(Least Bittern, Yellow-crowned Night-Heron, Least Bittern);
Bellman's Creek; Moonachie Creek(Yellow-crowned Night-Heron).
Note that most of these species feed and nest in the reed
marshes.
Reed marshes elsewhere in the state of importance to resident
birds include the Cape May Point State Park marshes and the
marshes at the east end of the South Cape May Meadows(bitterns
and rails); marshes associated with dredge spoil islands on the
intra-coastal waterway(all NJ-nesting herons except Great Blue(9
spp.) and Glossy Ibis); marshes on the Pedicktown spoils when
flooded(grebes, coot, Ruddy Duck, Least Bittern); and mixed
marshes on the Delaware and Arthur Kill tributaries, too
numerous to mention. Thus far, this discussion has focussed on
breeding birds.
Breeding bird habitat is not the only value phragmites has
for birds. Phrags hosted a summer dispersal roost of hundreds of
egrets in Kearny(Kane, NJA Supplement,Winter 1978) and elsewhere
in the Hackensack Meadowlands, Black-crowned Night-Heron winter
roosts(as important as breeding sites) in Kingsland and Kearny.
The same function is observable on Delaware bayshore marshes.
Reed also provides cover and forage areas for migrant
passerines(see Gustafson, Records of New Jersey Birds, Winter
1986-87); winter roosts for raptors(Bosakowski, Records of New
Jersey Birds, Autumn 1983); and lots of other functions such as
windbreaks for migrant and winter waterfowl, feeding
"trunks" for chickadees and Downy Woodpeckers, cover
for pheasants, all personal observations.
A final Audubon concern in the flap over phrag is the ready
assumption that reed is bad because it is a monoculture. Now a
case can be made for removing exotic(non-native) monocultures if
they outcompete native species, result in a loss of resident
animals or cause a hazard. But we don't usually eradicate our
native monocultures; we manage them. There's a world of
important difference. We thin or harvest our forests; we don't
wipe them out with chemicals. We manage through mowing our
grassland and shrub habitats according to various regimens for
wildlife management purposes. Isn't it about time we managed
reed, instead of wiping it out? When reed is ponded, when it is
flowed with streams, when it is returned to a water source, when
it includes mudflats, and when its water levels are managed,
phrag is as productive of animal life as any wetland type. We do
it with spartina(Open Marsh Water Management, also not
sufficiently studied); we do it with cedar swamps; we do it with
cranberry bogs; why not with phrag?
Other factors also compel us to re-examine our treatment of
this resource. The Clean Water Act requires mitigation for
wetlands violations such as dredging and filling without
permits, and compensation for polluting waterways with
chemicals. Phrag management could be required with the
cooperation of the agencies involved: EPA, the Army Corps, and
the US FIsh and Wildlife Service. Recent studies, one in the
Connecticut River(Fell et al. Journal Expt'l Marine Biology
& Ecology, 1998) and one in the Chesapeake(Meyer and Gill,
Report to NOAA, 1998) show fish to be equal in biomass or
abundance in phrag and spartina. That alone, if universally
true, would be sufficient to give the agencies pause before
thinking eradication. When coupled with other events such as
development, ditching, rise in sea level, ability of phrag to
uptake metals, drop in populations of freshwater wetland birds
and percent of brackish marshes now in reed, these factors drive
us to the conclusion that we need wise conservation of phrag
marshes. Use it, don't lose it!
By way of postscript, it remains only to note that there are
some towns now in New Jersey whose only open space is in
phragmites. There are others fast approaching that point.
Audubon's view is longterm, and that is one reason among others
why we have complained about the Hackensack Meadowland's Special
Area Management Plan. If these phragmites fields are plowed
under and paved, there will be no open space, no habitat, no
succession, no operation of natural processes. We know that
historically the Hackensack Meadowlands and other glacial lakes
went from black ash and black spruce to cedar swamps to marshes.
What habitats will ensue in 2500, we do not know. But in the
near term, we had better prepare.
Richard Kane, Vice President
Conservation and Stewardship
See also: Phragmites Use by Birds of
New Jersey