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Wildlife, Animals, and Plants
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Introductory
SPECIES: Scirpus acutus | Hardstem Bulrush
ABBREVIATION :
SCIACU
SYNONYMS :
Scirpus lacustris L. [32]
Schoenoplectus actus (Muhl.) A. & D. Love [93]
SCS PLANT CODE :
SCAC
COMMON NAMES :
hardstem bulrush
tule
TAXONOMY :
The currently accepted scientific name of hardstem bulrush is Scirpus
acutus Muhl. (Cyperaceae) [27,32,44,45,82,89]. There are no recognized
infrataxa.
Hardstem bulrush hybridizes with softstem bulrush (S. validus Vahl.) in
Saskatchewan and Manitoba [15,63]. In California hardstem bulrush may
hybridize with California bulrush (S. californicus) and softstem bulrush
[35].
LIFE FORM :
Graminoid
FEDERAL LEGAL STATUS :
No special status
OTHER STATUS :
NO-ENTRY
COMPILED BY AND DATE :
Lora L. Esser, June 1995
LAST REVISED BY AND DATE :
NO-ENTRY
AUTHORSHIP AND CITATION :
Esser, Lora L. 1995. Scirpus acutus. In: Remainder of Citation
DISTRIBUTION AND OCCURRENCE
SPECIES: Scirpus acutus | Hardstem Bulrush
GENERAL DISTRIBUTION :
Hardstem bulrush occurs from Nova Scotia and Newfoundland west to
southern British Columbia and south to North Carolina, Arkansas, Texas,
and California [27,45,51].
ECOSYSTEMS :
FRES37 Mountain meadows
FRES38 Plains grasslands
FRES39 Prairie
FRES41 Wet grasslands
STATES :
AZ AR CA CO CT DE ID IL IN IA
KS KY ME MD MA MI MN MO MT NE
NV NH NJ NM NY NC ND OH OK OR
PA RI SD TN TX UT VT VA WA WV
WI WY AB BC MB NB NF NS ON PQ
SK
ADMINISTRATIVE UNITS :
ACAD AGFO CANY CHIC COLM DEVA
DINO EFMO FRHI GLAC INDU ISRO
KNRI LAVO LIBI MOCA NOCA OLYM
OZAR PEFO PINN PIRO PIPE SAMO
SLBE SACN VOYA YELL ZION
BLM PHYSIOGRAPHIC REGIONS :
1 Northern Pacific Border
2 Cascade Mountains
3 Southern Pacific Border
4 Sierra Mountains
5 Columbia Plateau
6 Upper Basin and Range
8 Northern Rocky Mountains
9 Middle Rocky Mountains
10 Wyoming Basin
11 Southern Rocky Mountains
12 Colorado Plateau
13 Rocky Mountain Piedmont
14 Great Plains
16 Upper Missouri Basin and Broken Lands
KUCHLER PLANT ASSOCIATIONS :
K049 Tule marshes
SAF COVER TYPES :
NO-ENTRY
SRM (RANGELAND) COVER TYPES :
216 Montane meadows
217 Wetlands
422 Riparian
HABITAT TYPES AND PLANT COMMUNITIES :
Hardstem bulrush often forms monocultures in marshes throughout its
range [17,76,88]. It is a member of sandhill, spring fen, graminoid
fen, and wet meadow communities [6,11,17,70].
In California hardstem bulrush is a member of montane, coastal, and
valley freshwater marsh communities. Common associates include Olney
threesquare (Scirpus americanus), California bulrush (S. californicus),
slenderbeak sedge (Carex athrostachya), Nebraska sedge (C. nebracensis),
swamp carex (C. senta), cottonsedge (Eriophorum spp.), common reed
(Phragmites australis), and yellow nutgrass (Cyperus esculentus)
[37,83]. In the western and central United States, a common cattail
(Typha latifolia)-hardstem bulrush habitat type has been described
[1,10,73].
In Montana hardstem bulrush habitat, dominance, and riparian types have
been described [4,29,31]. Common associates include softstem bulrush,
beaked sedge (Carex rostrata), seaside arrowgrass (Triglochin maritima),
common spikesedge (Eleocharis palustris), and common buckbean
(Menyanthes trifoliata). In Utah hardstem bulrush is commonly
associated with saltmarsh bulrush (Scirpus maritimus), alkali bulrush
(S. paludosus), saltgrass (Distichlis spicata), and sago pondweed
(Potamogeton pectinatus) [5,7,10,66].
In North Dakota hardstem bulrush is dominant in marshes and meadows.
Associates include whitetop (Scolochloa festucacea), common cattail, and
common reed [17,46]. In Minnesota hardstem bulrush occurs in emergent
marshes with river bulrush (Scirpus fluviatilis), giant burreed
(Sparganium eurycarpus), prairie cordgrass (Spartina pectinata), and
marsh groundsel (Senecio congestus) [34,72].
In Canada hardstem bulrush is found in the Delta Marsh of Manitoba
[52,54]. It is also found in marshes and basins in Saskatchewan and
Alberta [16,77].
The following publications list hardstem bulrush as a community dominant
or codominant:
Classification and management of riparian and wetland sites in
northwestern Montana [4]
Classification and management of riparian and wetland sites in central
and eastern Montana [28]
Riparian dominance types of Montana [29]
Classification and management of riparian sites in southwestern Montana
[31]
Preliminary descriptions of terrestrial natural communities of
California [37]
Wetland community type classification for west-central Montana [56]
Classification of aquatic and semiaquatic wetland natural areas in Idaho
and western Montana [58]
VALUE AND USE
SPECIES: Scirpus acutus | Hardstem Bulrush
WOOD PRODUCTS VALUE :
NO-ENTRY
IMPORTANCE TO LIVESTOCK AND WILDLIFE :
Hardstem bulrush herbage production is high, but forage value is low.
It is seldom grazed by livestock if other forage is available [29]. If
upland forage becomes limited and soil conditions dry, livestock and big
game animals may utilize hardstem bulrush [4,29,30].
Hardstem bulrush is a staple food for muskrat [4] and other small
mammals [29,38]. Seeds are eaten by passerines and waterfowl [4,29,38].
In California hardstem bulrush comprised 26 percent of American coot
diets [3].
PALATABILITY :
Hardstem bulrush palatability is rated as poor for sheep and fair for
cattle and horses [90].
NUTRITIONAL VALUE :
Hardstem bulrush nutritional values are rated as follows [4,90]:
UT WY MT ND
elk poor poor poor ----
mule deer poor poor fair poor
white-tailed deer ---- poor poor poor
pronghorn poor poor ---- poor
upland game birds poor fair good poor
waterfowl good good good good
small nongame birds fair good good fair
small mammals good good fair ----
Energy rating is fair and protein content is poor [4,90]. In-vitro dry
matter digestibility, crude protein, and phosphorus levels decrease
linearly from late spring to late summer [42].
COVER VALUE :
Hardstem bulrush cover values are rated as follows [4,90]:
UT WY MT ND
upland game birds good good good good
waterfowl good good good good
small nongame birds good good good good
small mammals good good fair fair
Hardstem bulrush provides valuable nesting cover and escape cover for a
variety of passerines and waterfowl throughout its range [4,6,14,29,33].
In the prairie pothole region hardstem bulrush is preferred nesting
cover for redhead and canvasback hens [71]. In Utah hardstem bulrush is
important heron and egret nesting cover [7]. In Montana muskrat uses
hardstem bulrush in hut construction [4].
VALUE FOR REHABILITATION OF DISTURBED SITES :
Hardstem bulrush erosion control and short-term and long-term
revegetation potential are rated as medium [4,90]. Hardstem bulrush
buffers wind and wave action on lakes and ponds, which may enhance the
establishment of vegetation along shorelines [38]. In California 1.6
foot (0.5 m) segments of hardstem bulrush rhizomes were transplanted in
a tidal zone for erosion control in October 1978. Hardstem bulrush
survival rate was 4 percent in February 1979 [83].
OTHER USES AND VALUES :
NO-ENTRY
MANAGEMENT CONSIDERATIONS :
In Montana waterfowl managers often attempt to increase the proportion
of the hardstem bulrush dominance type relative to the common cattail
dominance type as a means of improving habitat [29,38]. Consumption of
hardstem bulrush by waterfowl and muskrats may decrease aboveground
standing biomass [66]. Hardstem bulrush may be replaced by cattail
(Typha spp.) in continuously flooded marshes following drawdown [34].
However, during years of drought coupled with heavy livestock grazing,
hardstem bulrush may increase at the expense of common cattail [92]. In
northern prairie wetlands hardstem bulrush replaces river bulrush and
sedges under intensive grazing [40].
Miller [49] suggests that hardstem bulrush may be reduced in some ponds
or fields where it dominates by draining the water off and then letting
drought conditions desiccate plants; mowing and burning following
drainage are recommended. Generally it is necessary to plow and summer
fallow the area for one season for best results.
Hardstem bulrush is used in artificial wetlands to filter agricultural
wastewater [38].
BOTANICAL AND ECOLOGICAL CHARACTERISTICS
SPECIES: Scirpus acutus | Hardstem Bulrush
GENERAL BOTANICAL CHARACTERISTICS :
Hardstem bulrush is a native, perennial graminoid. Culms are slender
and erect, usually 3.3 to 10 feet (1-3 m) tall, but occasionally
reaching heights of 16.5 feet (5 m) [24,27,38,45,48]. Leaves are
reduced to basal sheaths with blades up to 3.2 inches (8 cm) long [51].
Hardstem bulrush is densely colonial from extensive, stout rhizomes
[29,38,45,48,51].
RAUNKIAER LIFE FORM :
Geophyte
Helophyte
REGENERATION PROCESSES :
Sexual reproduction: Hardstem bulrush reproduces by seed [29,54,56].
Seed is dispersed by wind and water [29,55,56,65]. It establishes well
from seed stored in the seedbank [34,54,55]. Hardstem bulrush seed
establishes and germinates best on moist, bare soil [29,56], but will
germinate submerged in up to 1.6 inches (4 cm) of water in the
laboratory [65].
Vegetative reproduction: Hardstem bulrush reproduces from rhizomes
[51,62]. Adventitious shoots may arise from rhizomes that have extended
into pools from the littoral zone [62].
SITE CHARACTERISTICS :
Hardstem bulrush grows best on sites with saturated soil or standing
water for most of the year. It occurs in marshes, swamps, seeps,
washes, floodplains, along lake and stream margins, and in wet meadows
[27,35,38,44,82]. It grows in fresh or brackish water [18,45,51,57].
Soils are usually poorly drained [18,76] or continually saturated
[4,9,15,56]. Hardstem bulrush can grow in areas where the water table
is up to 5 feet (1.5 m) above or 0.33 feet (0.1 m) below the soil
surface [29,36,56,76]. In Montana hardstem bulrush is an obligate
wetland species [4] and an indicator of relatively stable water
conditions (areas where free water remains in the rooting zone for at
least part of the growing season and can be periodically flooded up to
6.6 feet [2 m]) [56]. In Utah hardstem bulrush is subordinate to Olney
threesquare because of limitations in salinity tolerance, shallow water,
and competitiveness [5]. Hardstem bulrush is fairly drought tolerant;
it can persist through several years of dry conditions [29]. Hardstem
bulrush grows in silt loam, clay, sandy loam, gravel, marl, and peaty
soils [12,29,33,38,76].
Elevations for hardstem bulrush are as follows:
feet meters
Arizona 2,500-9,000 750-2,700 [41]
California <5,000-8,500 <1,500-2,550 [51]
Colorado 3,500-9,000 1,050-2,700 [32,90]
Montana 2,180-6,650 665-2,028 [4,31]
Oregon 4,125-4,224 1,250-1,280 [88]
Utah 3,620-8,800 1,097-2,640 [82,90]
Wyoming 6,500-7,000 1,950-2,100 [90]
Yellowstone National Park 5,990-6,633 1,815-2,010 [8]
Saskatchewan 1,650-2,640 500-800 [77]
SUCCESSIONAL STATUS :
Hardstem bulrush is a dominant emergent on moist and saturated sites in
the northern plains and prairie states [13,40,54,72]. In Montana
hardstem bulrush colonizes newly exposed mudflats and drawdown areas
[29]. In Saskatchewan hardstem bulrush is one of the earliest rooted
macrophytes to invade flooded areas [15].
After hardstem bulrush becomes established in the hardstem bulrush
riparian site type in Montana, most other plant species are precluded
because of the saturated conditions and hardstem bulrush aggressiveness
[31]. Hardstem bulrush forms a stable dominance type on sites with
relatively constant water regimes; permanent standing water may result
in compositional shifts toward sedges (Carex spp.) [29].
In marl-bed vegetation of the Byron-Bergen Swamp of New York, hardstem
bulrush is dominant but may be replaced by shrubby cinquefoil
(Potentilla fruticosa) with accumulated litter [62].
Hardstem bulrush is found in the third sere of succession in Wisconsin
marshes, preceded by submerged and floating plant stages and followed by
sedge meadows, shrubs, and trees [20].
SEASONAL DEVELOPMENT :
Hardstem bulrush flowering dates are as follows:
California May-Aug [51]
Colorado June-Aug [90]
Montana June-Aug [90]
Wyoming June-Aug [90]
Great Plains June-mid Aug [45]
Nebraska June-Aug [24]
North Dakota July-Aug [90]
North Carolina July [59]
Tennessee July [59]
Virginia June-Sept [87]
FIRE ECOLOGY
SPECIES: Scirpus acutus | Hardstem Bulrush
FIRE ECOLOGY OR ADAPTATIONS :
Hardstem bulrush sprouts from rhizomes following fire [65,66]. After a
prescribed fire in the Great Salt Lake Marsh, Utah, on September 2,
1981, hardstem bulrush sprouts were 1.6 feet (0.5 m) tall before winter
freeze-up [68]. This fire occurred during an extended drought.
Postfire regeneration included germination from buried seed [65], and
probably also germination of off-site seed dispersed by wind and water.
POSTFIRE REGENERATION STRATEGY :
Rhizomatous herb, rhizome in soil
Ground residual colonizer (on-site, initial community)
Secondary colonizer - on-site seed
Secondary colonizer - off-site seed
FIRE EFFECTS
SPECIES: Scirpus acutus | Hardstem Bulrush
IMMEDIATE FIRE EFFECT ON PLANT :
Hardstem bulrush is top-killed or killed by most fires [7,65,88].
DISCUSSION AND QUALIFICATION OF FIRE EFFECT :
NO-ENTRY
PLANT RESPONSE TO FIRE :
Hardstem bulrush sprouts from rhizomes following fire [65,66], and
probably sprouts from the root crown as well. It establishes from
buried seed or seed dispersed onto burned sites [29,34,55,65].
Inflorescence production may increase for at least 1 postfire year [88].
Fire increases protein content in sprouting hardstem bulrush [67].
At the Bear River Migratory Bird Refuge, Utah, herons and egrets nest
almost exclusively in dead hardstem bulrush stands. Green and dead stem
densities (mean +/- SE) were studied on a March 1981 prescribed burn
site and on unburned nesting colony sites. The results are as follows
[7]:
site green stems/sq m dead stems/sq m
Burn, postfire month 4 38.3 +/- 3.2 0
Burn, postfire month 16 52.6 +/- 2.5 34.7 +/- 2.7
Great blue heron colony 43.5 +/- 4.1 59.0 +/- 6.5
Black-crowned night heron colony 41.7 +/- 3.2 65.2 +/- 4.9
Snowy egret colonies 59.4 +/- 5. 80.2 +/- 7.2
DISCUSSION AND QUALIFICATION OF PLANT RESPONSE :
NO-ENTRY
FIRE MANAGEMENT CONSIDERATIONS :
Burning dead hardstem bulrush stands may have a negative effect on
breeding herons and egrets [7]. Herons and egrets use dead hardstem
bulrush stems as nesting material. On the Bear River Migratory Bird
Refuge, fire eliminated all dead hardstem bulrush stems. Live stems may
be utilized later in the nesting season. Herons and egrets have been
reported to abandon traditional colonial nest sites that have been
burned [91]; thus, burning dead stands may have a negative effect on
breeding herons and egrets [7].
Wetland vertebrates may select certain marsh plant species due to
protein increases following fire [66].
The effects of fire and grazing on wetland plants after drawdowns in
Utah's Great Salt Lake Marsh were studied [65,66,68]. Five acres (2 ha)
were prescribed burned on September 2, 1981, then reflooded 1 week
later. Data were recorded in areas grazed by waterfowl and muskrats,
and in exclosures protected from grazing. Mean annual production (g/sq
m/yr) +/- SD of hardstem bulrush (S. acutus and S. validus were both
referred to as S. lacustris) under grazed and burned treatments was
measured from May to August 1982. Results were as follows [66]:
burned unburned
grazed 915 +/- 366 1084 +/- 495
ungrazed 1559 +/- 811 1556 +/- 684
The effect of prescribed burning on hardstem bulrush standing crop was
minimal. The total annual production of the hardstem bulrush vegetation
type after fire was not significantly different (P >.10) than the
production of these types in unburned areas. Grazing, however, had a
significant impact (P <.05) on production in hardstem bulrush stands.
Grazing significantly reduced the total annual production of the
hardstem bulrush type within the burned sites [66,68]. Roots and
rhizome numbers were lower on the burned than unburned units, but
mortality was not great enough to significantly reduce total
productivity [68].
FIRE CASE STUDIES
SPECIES: Scirpus acutus | Hardstem Bulrush
CASE NAME :
Fire effects on wetland vegetation/Malheur NWR, Oregon
REFERENCE :
Young, R. P. 1986 [88]
SEASON/SEVERITY CLASSIFICATION :
late fall/moderate-high severity
early spring/moderate-high severity
STUDY LOCATION :
The study was located in Harney Basin in the Malheur National Wildlife
Refuge (NWR), Oregon.
PREFIRE VEGETATIVE COMMUNITY :
A monotypic, palustrine hardstem bulrush (Scirpus acutus) wetland
community type occurs throughout the Malheur NWR. Standing dead fuel
was assessed 2 to 10 days preceding a fire. A series of quadrats were
located throughout the cover type; on the quadrats, vegetation was
harvested to ground level and collected for oven drying and weighing.
TARGET SPECIES PHENOLOGICAL STATE :
All prescribed fires were conducted during periods of vegetative
dormancy.
SITE DESCRIPTION :
The study site was located on a flat to gently rolling landscape at
4,015 to 4,225 feet (1,250-1,280 m) elevation. Harney Basin is
characterized by a semiarid climate and moderate to cold temperatures.
Annual precipitation averages 10 to 12 inches (250-300 mm), but extremes
of 4 inches (100 mm) and 20 inches (500 mm) have been recorded. The
bulk of precipitation occurs in winter and spring, whereas summers are
typically dry. The riverine and palustrine systems occupy the
bottomlands draining into Malheur and Harney lakes. These are typically
long, narrow wetland zones composed of a continuum of ponds, sloughs,
marshes, and wet meadows.
FIRE DESCRIPTION :
Hardstem bulrush prescribed burn sites were at least 5 acres (2 ha) and
were located in areas that would facilitate safe and efficient
controlled burning. Prefire fuels and fire weather conditions at the
Malheur NWR were as follows:
fire dates 9 December 1980 7 April 1981
prefire fuel load (g/sq m)
mean 1,817 1,707
range 1,062-2,402 887-2,208
fuel height (cm) 184 122
litter depth (cm) 74 66
fuel moisture (%) 4.6 5.8
temperature (C) 3-5 4-9
relative humidity (%) 27-34 31-35
wind speed (km/h) 2-16 6-10
Fire behavior and effects on fuels were as follows:
fire dates 9 Dec 1980 7 April 1981
rate of spread (m/min)
headfire 5-30 20-25
backfire 1-1.5 1-2
flame length (m)
headfire 3-10 3-4
backfire 1-2 1-2
postfire residual fuels (g/sq m)
mean 309 154
range 27-568 12-328
reduction (%) 83 91
Rate of spread was strongly influenced by wind speed.
FIRE EFFECTS ON TARGET SPECIES :
Regenerative tissues arising form rhizomes were protected from heat
injury under conditions of dormant season, surface fires. Winter and
spring burning of hardstem bulrush increased reproduction for at least 1
year. Inflorescence production increased by 25 percent for at least 1
year. Burning increased aboveground standing crop and shoot densities
for 2 years. Mean shoot weight decreased slightly.
FIRE MANAGEMENT IMPLICATIONS :
Prescribed fires reduce the amount of litter in hardstem bulrush stands,
which may increase hardstem bulrush productivity.
REFERENCES
SPECIES: Scirpus acutus | Hardstem Bulrush
REFERENCES :
1. Anderson, Bertin W.; Ohmart, Robert D.; Meents, Julie K.; Hunter,
William C. 1984. Avian use of marshes on the lower Colorado River. In:
Warner, Richard E.; Hendrix, Kathleen M., eds. California riparian
systems: Ecology, conservation, and productive management: Proceedings
of a conference; 1981 September 17-19; Davis, CA. Berkeley, CA:
University of California Press: 598-604. [5861]
2. Bernard, Stephen R.; Brown, Kenneth F. 1977. Distribution of mammals,
reptiles, and amphibians by BLM physiographic regions and A.W. Kuchler's
associations for the eleven western states. Tech. Note 301. Denver, CO:
U.S. Department of the Interior, Bureau of Land Management. 169 p.
[434]
3. Bogiatto, Raymond J., II. 1990. Fall and winter food habits of American
coots in the northern Sacramento Valley, California. California Fish and
Game. 76(4): 211-215. [25182]
4. Boggs, Keith; Hansen, Paul; Pfister, Robert; Joy, John. 1990.
Classification and management of riparian and wetland sites in
northwestern Montana. Missoula, MT: University of Montana, School of
Forestry, Montana Forest and Conservation Experiment Station, Montana
Riparian Association. 217 p. Draft Version 1. [8447]
5. Bolen, Eric G. 1964. Plant ecology of spring-fed salt marshes in western
Utah. Ecological Monographs. 34(2): 143-166. [11214]
6. Bomberger, Mary L. 1984. Quantitative assessment of the nesting habitat
of Wilson's phalarope. Wilson Bulletin. 96(1): 126-128. [11426]
7. Bray, Martin Paul. 1984. An evaluation of heron and egret marsh nesting
habitat and possible effects of burning. Murrelet. 65: 57-59. [6875]
8. Brichta, Paul Harold. 1986. Environmental relationships among wetland
community types of the northern range, Yellowstone National Park.
Missoula, MT: University of Montana. 74 p. Thesis. [6727]
9. Brotherson, Jack D. 1981. Aquatic and semiaquatic vegetation of Utah
Lake and its bays. Great Basin Naturalist Memoirs. 5: 68-84. [11212]
10. Capen, David E.; Low, Jessop B. 1980. Management considerations for
nongame birds in western wetlands. In: DeGraaf, Richard M., technical
coordinator. Management of western forests and grasslands for nongame
birds: Workshop proceedings; 1980 February 11-14; Salt Lake City, UT.
Gen. Tech. Rep. INT-86. Ogden, UT: U.S. Department of Agriculture,
Forest Service, Intermountain Forest and Range Experiment Station:
67-77. [17898]
11. Carpenter, Quentin J.; DeWitt, Calvin B. 1993. The effects of ant mounds
and animal trails on vegetation pattern in calcareous fens. Transactions
of the Wisconsin Academy of Sciences, Arts and Letters. 81: 23-30.
[23453]
12. Castaner, David; LaPlante, David. 1992. The vegetation of Little Bean
Marsh. Transactions, Missouri Academy of Science. 26: 27-34. [25183]
13. Cooper, James A. 1978. The history and breeding biology of the Canada
geese of Marshy Point, Manitoba. Wildlife Monographs No. 61. Washington,
DC: The Wildlife Society. 87 p. [18122]
14. Cowardin, Lewis M.; Gilmer, David S.; Shaiffer, Charles W. 1985. Mallard
recruitment in the agricultural environment of North Dakota. Wildlife
Monographs No. 92. Washington, DC: The Wildlife Society. 37 p. [18150]
15. Dabbs, Don L. 1971. A study of Scirpus acutus and Scirpus validus in the
Saskatchewan River delta. Canadian Journal of Botany. 49: 143-153.
[25184]
16. Dirschl, German J.; Dabbs, Don L.; Gentle, Garry C. 1974. Landscape
classification and plant successional trends in the Peace-Athabasca
Delta. Canadian Wildlife Service Report Series 30. Ottawa, ON: Canadian
Wildlife Service. 33 p. [6177]
17. Dix, R. L.; Smeins, F. E. 1967. The prairie, meadow, and marsh
vegetation of Nelson County, North Dakota. Canadian Journal of Botany.
45: 21-58. [5528]
18. Evans, Keith E.; Kerbs, Roger R. 1977. Avian use of livestock watering
ponds in western South Dakota. Gen. Tech. Rep. RM-35. Fort Collins, CO:
U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest
and Range Experiment Station. 11 p. [19330]
19. Eyre, F. H., ed. 1980. Forest cover types of the United States and
Canada. Washington, DC: Society of American Foresters. 148 p. [905]
20. Frolik, A. L. 1941. Vegetation on the peat lands of Dane County,
Wisconsin. Ecological Monographs. 11(1): 117-140. [16805]
21. Garrison, George A.; Bjugstad, Ardell J.; Duncan, Don A.; [and others].
1977. Vegetation and environmental features of forest and range
ecosystems. Agric. Handb. 475. Washington, DC: U.S. Department of
Agriculture, Forest Service. 68 p. [998]
22. Giles, LeRoy W.; Marshall, David B. 1954. A large heron and egret colony
on the Stillwater Wildlife Management Area, Nevada. Auk. 71: 322-325.
[24971]
23. Glaser, Paul H.; Janssens, Jan A.; Siegel, Donald I. 1990. The response
of vegetation to chemical and hydrological gradients in the Lost River
peatland, northern Minnesota. Journal of Ecology. 78: 1021-1048.
[14341]
24. Gleason, Henry A.; Cronquist, Arthur. 1991. Manual of vascular plants of
northeastern United States and adjacent Canada. 2nd ed. New York: New
York Botanical Garden. 910 p. [20329]
25. Godfrey, Robert K.; Wooten, Jean W. 1979. Aquatic and wetland plants of
southeastern United States: Monocotyledons. Athens, GA: The University
of Georgia Press. 712 p. [16906]
26. Gorenzel, Warner P.; Ryder, Ronald A.; Braun, Clait E. 1981. American
coot response to habitat change on a Colorado marsh. Southwestern
Naturalist. 26(1): 59-65. [17677]
27. Great Plains Flora Association. 1986. Flora of the Great Plains.
Lawrence, KS: University Press of Kansas. 1392 p. [1603]
28. Hansen, Paul; Boggs, Keith; Pfister, Robert; Joy, John. 1990.
Classification and management of riparian and wetland sites in central
and eastern Montana. Missoula, MT: University of Montana, School of
Forestry, Montana Forest and Conservation Experiment Station, Montana
Riparian Association. 279 p. [12477]
29. Hansen, Paul L.; Chadde, Steve W.; Pfister, Robert D. 1988. Riparian
dominance types of Montana. Misc. Publ. No. 49. Missoula, MT: University
of Montana, School of Forestry, Montana Forest and Conservation
Experiment Station. 411 p. [5660]
30. Hansen, Paul; Chadde, Steve; Pfister, Robert; [and others]. 1988.
Riparian site types, habitat types, and community types of southwestern
Montana. Missoula, MT: University of Montana, School of Forestry,
Montana Riparian Association. 140 p. [5883]
31. Hansen, Paul; Pfister, Robert; Joy, John; [and others]. 1989.
Classification and management of riparian sites in southwestern Montana.
Missoula, MT: University of Montana, School of Forestry, Montana
Riparian Association. 292 p. Draft Version 2. [8900]
32. Harrington, H. D. 1964. Manual of the plants of Colorado. 2d ed.
Chicago: The Swallow Press Inc. 666 p. [6851]
33. Harris, Stanley W. 1954. An ecological study of the waterfowl of the
Potholes Area, Grant County, Washington. American Midland Naturalist.
52(2): 403-432. [11207]
34. Harris, Stanley W.; Marshall, William H. 1963. Ecology of water-level
manipulations on a northern marsh. Ecology. 44(2): 331-343. [17808]
35. Hickman, James C., ed. 1993. The Jepson manual: Higher plants of
California. Berkeley, CA: University of California Press. 1400 p.
[21992]
36. Hitchcock, C. Leo; Cronquist, Arthur. 1973. Flora of the Pacific
Northwest. Seattle, WA: University of Washington Press. 730 p. [1168]
37. Holland, Robert F. 1986. Preliminary descriptions of the terrestrial
natural communities of California. Sacramento, CA: California Department
of Fish and Game. 156 p. [12756]
38. Hurd, Emerenciana G.; Shaw, Nancy L.; Smithman, Lynda C. 1994.
Cyperaceae and Juncaceae--selected low-elevation species. In: Monsen,
Stephen B.; Kitchen, Stanley G., compilers. Proceedings--ecology and
management of annual rangelands; 1992 May 18-22; Boise, ID. Gen. Tech.
Rep. INT-GTR-313. Ogden, UT: U.S. Department of Agriculture, Forest
Service, Intermountain Research Station: 380-383. [24314]
39. Kadlec, John A.; Smith, Loren M. 1984. Marsh plant establishment on
newly flooded salt flats. Wildlife Society Bulletin. 12: 388-394.
[11220]
40. Kantrud, Harold A.; Millar, John B.; van der Valk, A. G. 1989.
Vegetation of wetlands of the prairie pothole region. In: van der Valk,
Arnold, ed. Northern prairie wetlands. Ames, IA: Iowa State University
Press: 132-187. [15217]
41. Kearney, Thomas H.; Peebles, Robert H.; Howell, John Thomas; McClintock,
Elizabeth. 1960. Arizona flora. 2d ed. Berkeley, CA: University of
California Press. 1085 p. [6563]
42. Kirby, Donald R.; Green, Douglas M.; Mings, Thomas S. 1989. Nutrient
composition of selected emergent macrophytes in northern prairie
wetlands. Journal of Range Management. 42: 323-326. [6802]
43. Kuchler, A. W. 1964. Manual to accompany the map of potential vegetation
of the conterminous United States. Special Publication No. 36. New York:
American Geographical Society. 77 p. [1384]
44. Lackschewitz, Klaus. 1991. Vascular plants of west-central
Montana--identification guidebook. Gen. Tech. Rep. INT-227. Ogden, UT:
U.S. Department of Agriculture, Forest Service, Intermountain Research
Station. 648 p. [13798]
45. Larson, Gary E. 1993. Aquatic and wetland vascular plants of the
Northern Great Plains. Gen. Tech. Rep. RM-238. Fort Collins, CO: U.S.
Department of Agriculture, Forest Service, Rocky Mountain Forest and
Range Experiment Station. 681 p. [22534]
46. Lokemoen, John T.; Duebbert, Harold F.; Sharp, David E. 1990. Homing and
reproductive habits of mallards, gadwalls, and blue-winged teal.
Wildlife Monographs. 106: 1-28. [18102]
47. Martz, Gerald F. 1967. Effects of nesting cover removal on breeding
puddle ducks. Journal of Wildlife Management. 31(2): 236-247. [16284]
48. Mason, Herbert L. 1957. A flora of the marshes of California. Berkeley,
CA: University of California Press. 878 p. [16905]
49. Miller, A. Wendell. 1962. Waterfowl habitat improvement in California.
In: Proceedings, annual conference of Western Association of State Fish
& Game Commissioners. [Volume unknown]: 112-118. [15439]
50. Minckley, W. L.; Brown, David E. 1982. Wetlands. In: Brown, David E.,
ed. Biotic communities of the American Southwest--United States and
Mexico. Desert Plants. 4(1-4): 223-287. [8898]
51. Munz, Philip A. 1973. A California flora and supplement. Berkeley, CA:
University of California Press. 1905 p. [6155]
52. Nelson, Jeffrey W.; Kadlec, John A.; Murkin, Henry R. 1990. Seasonal
comparisons of weight loss for two types of Typha glauca Godr. leaf
litter. Aquatic Botany. 37(4): 299-314. [17426]
53. Novacek, Jean M. 1989. The water and wetland resources of the Nebraska
sandhills. In: Vander Valk, Arnold, ed. Northern prairie wetlands. Ames,
IA: Iowa State University Press: 340-384. [15221]
54. Pederson, Roger L. 1981. Seed bank characteristics of the Delta Marsh,
Manitoba: applications for wetland management. In: Richardson, B., ed.
Midwest conference on wetland values and management: Selected
proceedings; 1981 June 17-19; St. Paul, MN. Minneapolis, MN: Freshwater
Society: 61-69. [24016]
55. Pederson, Roger L.; van der Valk, Arnold G. 1984. Vegetation change and
seed banks in marshes: ecological and management implications.
Transactions, North American Wildlife and Natural Resources Conference.
49: 271-280. [19512]
56. Pierce, John; Johnson, Janet. 1986. Wetland community type
classification for west-central Montana. Missoula, MT: U.S. Department
of Agriculture, Forest Service, Northern Region, Ecosystem Management
Program. 158 p. [Review draft]. [7436]
57. Porter, Duncan M. 1979. Rare and endangered vascular plant species in
Virginia. Newton Corner, MA: U.S. Department of the Interior, Fish and
Wildlife Service. 52 p. [16514]
58. Rabe, Fred W.; Chadde, Steve W. 1994. Classification of aquatic and
semiaquatic wetland natural areas in Idaho and western Montana. Natural
Areas Journal. 14(3): 175-187. [23962]
59. Radford, Albert E.; Ahles, Harry E.; Bell, C. Ritchie. 1968. Manual of
the vascular flora of the Carolinas. Chapel Hill, NC: The University of
North Carolina Press. 1183 p. [7606]
60. Raunkiaer, C. 1934. The life forms of plants and statistical plant
geography. Oxford: Clarendon Press. 632 p. [2843]
61. Rea, Amadeo M. 1988. Habitat restoration and avian recolonization from
wastewater on the Middle Gila River, Arizona. In: Whitehead, E. E. [and
others], eds. Proceedings, Arid lands conference; 1985; Tucson, AZ.
[Place of publication unknown]: Bellhaven/Westview Press: 1395-1405.
[9823]
62. Seischab, Franz K. 1984. Plant community development in the Byron-Bergen
Swamp: marl-bed vegetation. Canadian Journal of Botany. 62: 1006-1017.
[23731]
63. Shay, Jennifer M.; Macaulay, A. J.; Frego, K. A. 1988. A morphological
comparison of Scirpus acutus and S. validus in southern Manitoba.
Canadian Journal of Botany. 66(11): 2331-2337. [21916]
64. Shiflet, Thomas N., ed. 1994. Rangeland cover types of the United
States. Denver, CO: Society for Range Management. 152 p. [23362]
65. Smith, Loren M.; Kadlec, John A. 1983. Seed banks and their role during
drawdown of a North American marsh. Journal of Applied Ecology. 20:
673-684. [11196]
66. Smith, Loren M.; Kadlec, John A. 1985. Fire and herbivory in a Great
Salt Lake marsh. Ecology. 66(1): 259-265. [7619]
67. Smith, Loren M.; Kadlec, John A. 1984. Effects of prescribed burning on
nutritive quality of marsh plants in Utah. Journal of Wildlife
Management. 48(1): 285-288. [24982]
68. Smith, Loren Michael. 1983. Effects of prescribed burning on the ecology
of a Utah marsh. Logan, UT: Utah State University. 159 p. Dissertation.
[10218]
69. Stickney, Peter F. 1989. Seral origin of species originating in northern
Rocky Mountain forests. Unpublished draft on file at: U.S. Department of
Agriculture, Forest Service, Intermountain Research Station, Fire
Sciences Laboratory, Missoula, MT; RWU 4403 files. 7 p. [20090]
70. Stoynoff, Nick A. 1993. A quantitative analysis of the vegetation of
Bluff Spring Fen Nature Preserve. Transactions, Illinois State Academy
of Science. 63(3&4): 93-110. [23734]
71. Swanson, George A.; Duebbert, Harold F. 1989. Wetland habitats of
waterfowl in the prairie pothole region. In: van der Valk, Arnold, ed.
Northern prairie wetlands. Ames, IA: Iowa State University Press:
228-267. [15218]
72. Tester, John R.; Marshall, William H. 1962. Minnesota prairie management
techniques and their wildlife implications. Proceedings, 27th North
American Wildlife Conference. 27: 267-287. [14960]
73. Thorn, Terri D.; Zwank, Phillip J. 1993. Foods of migrating cinnamon
teal in central New Mexico. Journal of Field Ornithology. 64(4):
452-463. [25185]
74. U.S. Department of Agriculture, Soil Conservation Service. 1994. Plants
of the U.S.--alphabetical listing. Washington, DC: U.S. Department of
Agriculture, Soil Conservation Service. 954 p. [23104]
75. U.S. Department of the Interior, National Biological Survey. [n.d.]. NP
Flora [Data base]. Davis, CA: U.S. Department of the Interior, National
Biological Survey. [23119]
76. Voss, Edward G. 1972. Michigan flora. Part I. Gymnosperms and monocots.
Bloomfield Hills, MI: Cranbrook Institute of Science; Ann Arbor, MI:
University of Michigan Herbarium. 488 p. [11471]
77. Walker, B. H.; Coupland, R. T. 1970. Herbaceous wetland vegetation in
the aspen grove and grassland regions of Saskatchewan. Canadian Journal
of Botany. 48: 1861-1878. [23547]
78. Ward, Edward. 1942. Phragmites management. Transactions, 7th North
American Wildlife Conference. 7: 294-298. [14959]
79. Ward, P. 1968. Fire in relation to waterfowl habitat of the delta
marshes. In: Proceedings, annual Tall Timbers fire ecology conference;
1968 March 14-15; Tallahassee, FL. No. 8. Tallahassee, FL: Tall Timbers
Research Station: 255-267. [18932]
80. Ward, Peter. 1974. Fires in the marsh. Manitoba Nature. Summer: 16-27.
[19484]
81. Weatherbee, Pamela B.; Crow, Garrett E. 1992. Natural plant communities
of Berkshire County, Massachusetts. Rhodora. 94(878): 171-209. [19726]
82. Welsh, Stanley L.; Atwood, N. Duane; Goodrich, Sherel; Higgins, Larry
C., eds. 1987. A Utah flora. Great Basin Naturalist Memoir No. 9. Provo,
UT: Brigham Young University. 894 p. [2944]
83. Whitlow, Thomas H.; Harris, Richard W.; Leiser, Andrew T. 1984.
Experimenting with levee vegetation: some unexpected findings. In:
Warner, Richard E.; Hendrix, Kathleen M., eds. California riparian
systems: Ecology, conservation, and productive management: Proceedings
of a conference; 1981 September 17-19; Davis, CA. Berkeley, CA:
University of California Press: 558-565. [5858]
84. Wienhold, C. E.; van der Valk, A. G. 1989. The impact of duration of
drainage on the seed banks of northern prairie wetlands. Canadian
Journal of Botany. 67(6): 1878-1884. [13799]
85. Williams, Cecil S.; Marshall, Wm. H. 1938. Duck nesting studies, Bear
River Migratory Bird Refuge, Utah, 1937. Journal of Wildlife Management.
2(2): 29-52. [11191]
86. Willoughby, John W.; Davilla, William. 1984. Plant species composition
and life form spectra of tidal streambanks and adjacent riparian
woodlands along the lower Sacramento River. In: Warner, Richard E.;
Hendrix, Kathleen M., eds. California riparian systems: Ecology,
conservation, and productive management: Proceedings of a conference;
1981 September 17-19; Davis, CA. Berkeley, CA: University of California
Press: 642-651. [5866]
87. Wofford, B. Eugene. 1989. Guide to the vascular plants of the Blue
Ridge. Athens, GA: The University of Georgia Press. 384 p. [12908]
88. Young, Richard P. 1986. Fire ecology and management in plant communities
of Malheur National Wildlife Refuge. Portland, OR: Oregon State
University. 169 p. Thesis. [3745]
89. Kartesz, John T. 1994. A synonymized checklist of the vascular flora of
the United States, Canada, and Greenland. Volume II--thesaurus. 2nd ed.
Portland, OR: Timber Press. 816 p. [23878]
90. Dittberner, Phillip L.; Olson, Michael R. 1983. The plant information
network (PIN) data base: Colorado, Montana, North Dakota, Utah, and
Wyoming. FWS/OBS-83/86. Washington, DC: U.S. Department of the Interior,
Fish and Wildlife Service. 786 p. [806]
91. Giles, LeRoy W.; Marshall, David B. 1954. A large heron and egret colony
on the Stillwater Wildlife Management Area, Nevada. Auk. 71: 322-325.
[24971]
92. Stewart, Robert E.; Kantrud, Harold A. 1972. Vegetation of prairie
potholes, North Dakota, in relation to quality of water and other
environmental factors. In: Geological survey of professional papaers.
85-0. [Place of publication unknown]: [Publisher unknown]: D1 to D36.
[25186]
93. Kartesz, John T.; Meacham, Christopher A. 1999. Synthesis of the North
American flora (Windows Version 1.0), [CD-ROM]. Available: North Carolina
Botanical Garden. In cooperation with the Nature Conservancy, Natural
Resources Conservation Service, and U.S. Fish and Wildlife Service [2001,
January 16]. [38380]
Index
Related categories for Species: Scirpus acutus
| Hardstem Bulrush
|
 |
