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Ana River
The Ana River is a short spring-fed river in south-central Oregon. It is on the northwestern edge of the Great Basin drainage. It flows from springs at the foot of Winter Ridge through high desert, range, and wetlands before emptying into Summer Lake. For most of its course, the Ana River flows through the Summer Lake Wildlife Area, which is maintained by the Oregon Department of Fish and Wildlife. The river provides habitat for many mammal and bird species, as well as several fish species, including the rare Summer Lake Tui chub. The largest hybrid striped bass ever caught in Oregon was taken from Ana Reservoir in 2009. Watershed The Ana River is located a few miles east of the small unincorporated community of Summer Lake, Oregon. The river flows for through the high desert country of Lake County, Oregon, before draining into Summer Lake.Anderson, E. William, Michael M. Borman, and William C. Krueger"Vegetation", "High Desert Ecological Province", ''The Ecological Pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Summer Lake (Oregon)
Summer Lake is a large, shallow, alkali lake in Lake County, Oregon, United States located south of the small, unincorporated community of Summer Lake, Oregon. At high water it is about long and wide, and supports a wide variety of birds and other wildlife in its marshes. The lake was named by explorer John C. Fremont on his expedition into Central Oregon in 1843. Ancient Lake Chewaucan The arid lands around Summer Lake were once lush. During the Pleistocene Epoch, vast areas of this region of south central Oregon were covered by lakes and wetlands. As the last ice age was ending, rain and runoff from melting snow filled the lowlands throughout this region of the Great Basin, creating an immense, freshwater lake called Lake Chewaucan. The lake covered at depths of up to ."Ancient Lakes", Oregon Historical Marker, Summer Lake, Oregon. Lake Chewaucan covered the Summer Lake basin and drainage system much of the late Pleistocene. The last high water period is thought ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquatic Ecosystem
An aquatic ecosystem is an ecosystem formed by surrounding a body of water, in contrast to land-based terrestrial ecosystems. Aquatic ecosystems contain communities of organisms that are dependent on each other and on their environment. The two main types of aquatic ecosystems are marine ecosystems and freshwater ecosystems. Freshwater ecosystems may be lentic (slow moving water, including pools, ponds, and lakes); lotic (faster moving water, for example streams and rivers); and wetlands (areas where the soil is saturated or inundated for at least part of the time). Types Marine ecosystems Marine coastal ecosystem Marine surface ecosystem Freshwater ecosystems Lentic ecosystem (lakes) Lotic ecosystem (rivers) Wetlands Functions Aquatic ecosystems perform many important environmental functions. For example, they recycle nutrients, purify water, attenuate floods, recharge ground water and provide habitats for wildlife. Aquatic ecosystems are also used for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scirpus
''Scirpus'' is a genus of grass-like species in the sedge family Cyperaceae many with the common names club-rush, wood club-rush or bulrush (see also bulrush for other plant genera so-named). They mostly inhabit wetlands and damp locations. Taxonomy The taxonomy of the genus is complex, and under review by botanists. Recent studies by taxonomists of the Cyperaceae have resulted in the creation of several new genera, including the genera ''Schoenoplectus'' and ''Bolboschoenus''; others (including '' Blysmus'', ''Isolepis'', '' Nomochloa'', and ''Scirpoides'') have also been used. At one point this genus held almost 300 species, but many of the species once assigned to it have now been reassigned, and it now holds an estimated 120 species. Description ''Scirpus'' are rhizomatous perennial herbs, with 3-angled stems and flat grass-like leaves. The flowers are in clusters of small spikelets, often brown or greenish brown. Some species (e.g. ''S. lacustris'') can reach a height of 3 m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedges
The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus ''Carex'' with over 2,000 species. These species are widely distributed, with the centers of diversity for the group occurring in tropical Asia and tropical South America. While sedges may be found growing in almost all environments, many are associated with wetlands, or with poor soils. Ecological communities dominated by sedges are known as sedgelands or sedge meadows. Some species superficially resemble the closely related rushes and the more distantly related grasses. Features distinguishing members of the sedge family from grasses or rushes are stems with triangular cross-sections (with occasional exceptions, a notable example being the tule which has a round cross-section) and leaves that are spirally arranged in three ranks. In comparison, gra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ditch
A ditch is a small to moderate divot created to channel water. A ditch can be used for drainage, to drain water from low-lying areas, alongside roadways or fields, or to channel water from a more distant source for plant irrigation. Ditches are commonly seen around farmland, especially in areas that have required drainage, such as The Fens in eastern England and much of the Netherlands. Roadside ditches may provide a hazard to motorists and cyclists, whose vehicles may crash into them and get damaged, flipped over, or stuck and cause major injury, especially in poor weather conditions and rural areas. Etymology In Anglo-Saxon, the word ''dïc'' already existed and was pronounced "deek" in northern England and "deetch" in the south. The origins of the word lie in digging a trench and forming the upcast soil into a bank alongside it. This practice has meant that the name ''dïc'' was given to either the excavation or the bank, and evolved to both the words "dike"/"dyke" and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Levee
A levee (), dike (American English), dyke (English in the Commonwealth of Nations, Commonwealth English), embankment, floodbank, or stop bank is a structure that is usually soil, earthen and that often runs parallel (geometry), parallel to the course of a river in its floodplain or along low-lying coastlines. The purpose of a levee is to keep the course of rivers from changing and to protect against flooding of the area adjoining the river or coast. Levees can be naturally occurring ridge structures that form next to the bank of a river, or be an artificially constructed fill dirt, fill or wall that regulates water levels. Ancient civilizations in the Indus Valley civilisation, Indus Valley, ancient Egypt, Mesopotamia and China all built levees. Today, levees can be found around the world, and failures of levees due to erosion or other causes can be major disasters. Etymology Speakers of American English (notably in the Midwestern United States, Midwest and Deep South) u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Willow
Willows, also called sallows and osiers, from the genus ''Salix'', comprise around 400 speciesMabberley, D.J. 1997. The Plant Book, Cambridge University Press #2: Cambridge. of typically deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions. Most species are known as willow, but some narrow-leaved shrub species are called osier, and some broader-leaved species are referred to as sallow (from Old English ''sealh'', related to the Latin word ''salix'', willow). Some willows (particularly arctic and alpine species) are low-growing or creeping shrubs; for example, the dwarf willow (''Salix herbacea'') rarely exceeds in height, though it spreads widely across the ground. Description Willows all have abundant watery bark sap, which is heavily charged with salicylic acid, soft, usually pliant, tough wood, slender branches, and large, fibrous, often stoloniferous roots. The roots are remarkable for their toughness, size, and tenacity to live ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Populus Section Aegiros
''Populus'' section ''Aigeiros'' is a section of three species in the genus ''Populus'', the poplars. Like some other species in the genus ''Populus'', they are commonly known as cottonwoods. The species are native to North America, Europe, and western Asia. In the past, as many as six species were recognized, but recent trends have been to accept just three species, treating the others as subspecies of ''P. deltoides''. They are large, deciduous trees that are tall and diameters of , distinguished by thick, deeply fissured bark and triangular-based to diamond-shaped leaves that are green on both sides (without the whitish wax on the undersides) and without any obvious balsam scent in spring. An important feature of the leaves is the petiole, which is flattened sideways so that the leaves have a particular type of movement in the wind. Male and female flowers are in separate catkins, appearing before the leaves in spring. The seeds are borne on cottony structures that allow t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Juniper
''Juniperus occidentalis'', known as the western juniper, is a shrub or tree native to the Western United States, growing in mountains at altitudes of and rarely down to . It is listed as Least Concern on the IUCN Red List because it is a widespread species with an increasing population. Description ''Juniperus occidentalis'' is a shrub or small tree tall. Exceptionally tall specimens can be found in the John Day area of Oregon in excess of tall. The shoots are of moderate thickness among junipers, at diameter. The juvenile leaves (on young seedlings only) are needle-like and long. Arranged in opposite decussate pairs or whorls of three, the adult leaves are scale-like, 1–2 mm long (5 mm on lead shoots) and 1–1.5 mm broad. The cones are berry-like, 5–10 mm in diameter, blue-brown with a whitish waxy bloom, and mature in about 18 months. The male cones are 2–4 mm long and shed their pollen in early spring. The plants are about half monoeciou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squirreltail
''Elymus elymoides'' is a species of wild rye known by the common name squirreltail. This grass is native to most of North America west of the Mississippi River and occurs in a number of ecosystems, from the alpine zone to desert sage scrub to valley grassland. Description ''Elymus elymoides'' is a perennial bunch grass growing to around in height. Its erect solid stems have flat or rolled leaf blades. The inflorescence is up to long and somewhat stiff and erect, with spikelets one or two centimeters long not counting the awn, which may be 9 centimeters long and sticks straight out at maturity, making the inflorescence look like a bottlebrush (see main image), and aiding wind dispersal of the seeds. In contrast, the early-season spike is compact and reddish, as in the images at left. This grass is considered very good forage for sheep. It is best for grazing during the winter, when it is small and green. It becomes less palatable to livestock when its awns grow long and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oryzopsis Hymenoides
''Eriocoma hymenoides'' (common names: Indian ricegrass and sand rice grass) is a cool-season, perennial bunchgrass with narrow, rolled leaf blades.Mojave Desert Wildflowers, Pam MacKay, 2nd Ed., p287 It is native to western North America east of the Cascades from British Columbia and Alberta south to southern California, northeastern Mexico, and Texas. Description In the wild, it typically grows 4 to 24 in (10 to 61 cm) tall and 8 to 12 in (20 to 30 cm) wide.Tirmenstein, D. 1999Achnatherum hymenoides In: Fire Effects Information System, nline U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Retrieved on 2009-04-24. Habitat ''E. hymenoides'' grows in a variety of habitats from desert scrub to ponderosa pine forests. It can live in sandy to clayey textured soils. . It can stabilize shifting sand.Canyon Country Wildflowers, Damian Fagan, 2nd ed., 2012, Morris Bush Publishing, LLC. in cooperation wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achnatherum
''Achnatherum'' is a genus of plants which includes several species of needlegrass. Several needlegrass species have been switched between ''Achnatherum'' and genus ''Stipa''; taxonomy between the two closely related genera is still uncertain. '' Achnatherum hymenoides'' was useful as a food source to Native Americans. '' Achnatherum brachychaetum'' is best known as a noxious weed. Species Species recognized by Plants of the World Online as of November 2019: Species previously included in ''Achnatherum'': * '' Achnatherum acutum'' (Swallen) Valdés-Reyna & Barkworth * ''Achnatherum aridum'' (M.E.Jones) Barkworth - Mormon needlegrass * '' Achnatherum bloomeri'' (Boland.) Barkworth - Bloomer's ricegrass * ''Achnatherum bromoides'' (L.) P. Beauv. * '' Achnatherum brachychaetum'' (Godr.) Barkworth - punagrass * '' Achnatherum capense'' (L.) P. Beauv. * '' Achnatherum caragana'' (Trin. & Rupr.) Nevski * '' Achnatherum caudatum'' (Trin.) S. L. W. Jacobs & J. Everett - Chilean ri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
