Copeland Creek is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data
The National Map
, accessed 9 March 2011

perennial stream A stream is a continuous body of surface water flowing within the bed and banks of a channel. Depending on its location or certain characteristics, a stream may be referred to by a variety of local or regional names. Long, large stream ...

that rises on

Sonoma Mountain Sonoma Mountain ( Coast Miwok: ''Oona-pa'is'') is a prominent landform within the Sonoma Mountains of southern Sonoma County, California. At an elevation of , Sonoma Mountain offers expansive views of the Pacific Ocean to the west and the Sono ...

Sonoma County, California Sonoma County ( ) is a county located in the U.S. state of California. As of the 2020 United States census, its population was 488,863. Its seat of government and largest city is Santa Rosa. Sonoma County comprises the Santa Rosa-Petaluma ...

Description

The headwaters area is slightly above the Fairfield Osborn Preserve, while the middle reaches drain

grazing In agriculture, grazing is a method of animal husbandry whereby domestic livestock are allowed outdoors to free range (roam around) and consume wild vegetations in order to feed conversion ratio, convert the otherwise indigestible (by human diges ...

land and vineyards on the lower western slopes of the

Sonoma Mountains The Sonoma Mountains are a northwest–southeast trending mountain range of the Inner Coast Ranges in the California Coast Ranges System, located in Sonoma County, Northern California. Geography The Sonoma Mountains range is approximately long ...

. Upon reaching the valley floor Copeland Creek bisects the campus of

Sonoma State University Sonoma State University (SSU, Sonoma State, or Sonoma) is a public university in Sonoma County, California, United States. It is part of the California State University system. Sonoma State offers 92 bachelor's degree programs, 19 master's de ...

on its journey to discharge into the

Laguna de Santa Rosa The Laguna de Santa Rosa is a wetland complex that drains a watershed encompassing most of the Santa Rosa Plain in Sonoma County, California, United States. The California Office of Environmental Health Hazard Assessment has issued a safe ...

. The Copeland Creek watershed is part of the Russian River basin, which drains to the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

History

The

prehistory Prehistory, also called pre-literary history, is the period of human history between the first known use of stone tools by hominins million years ago and the beginning of recorded history with the invention of writing systems. The use ...

of this watershed and creek environment includes settlement by

Coast Miwok The Coast Miwok are an Indigenous people of California that were the second-largest tribe of the Miwok people. Coast Miwok inhabited the general area of present-day Marin County and southern Sonoma County in Northern California, from the Golde ...

Wappo The Wappo (endonym: ''Micewal'') are an Indigenous people of northern California. Their traditional homelands are in Napa Valley, the south shore of Clear Lake, Alexander Valley, and Russian River valley. They are distantly related to the Yu ...

and

Pomo people The Pomo are a Indigenous peoples of California, Native American people of California. Historical Pomo territory in Northern California was large, bordered by the West Coast of the United States, Pacific Coast to the west, extending inland to ...

s. These

hunter gatherer A hunter-gatherer or forager is a human living in a community, or according to an ancestrally derived lifestyle, in which most or all food is obtained by foraging, that is, by gathering food from local naturally occurring sources, especially wi ...

s dominated human usage until arrival of

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

ans in the early 19th century. Rather swiftly an

overgrazing Overgrazing occurs when plants are exposed to intensive grazing for extended periods of time, or without sufficient recovery periods. It can be caused by either livestock in poorly managed agricultural applications, game reserves, or nature ...

situation arose not only in the lower reaches, but as high as the present Fairfield Osborn Preserve, which extends to elevation . The upper reaches of the creek were effectively restored, following the purchase of the present lands of the Fairfield Osborn Preserve by William Matson Roth. The lower reaches were heavily disturbed as late as the 1990s, when a restoration of the reach between Roberts Road and Petaluma Hill Road was started. These lower reaches would have been historically heavily vegetated by native

alder Alders are trees of the genus ''Alnus'' in the birch family Betulaceae. The genus includes about 35 species of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few species ex ...

and arroyo

willow Willows, also called sallows and osiers, of the genus ''Salix'', comprise around 350 species (plus numerous hybrids) of typically deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions. Most species are known ...

. However, cattle grazing and associated trampling of

vegetation Vegetation is an assemblage of plants and the ground cover they provide. It is a general term, without specific reference to particular Taxon, taxa, life forms, structure, Spatial ecology, spatial extent, or any other specific Botany, botanic ...

severely reduced spawning of

anadromous Fish migration is mass relocation by fish from one area or body of water to another. Many types of fish migrate on a regular basis, on time scales ranging from daily to annually or longer, and over distances ranging from a few metres to thousa ...

fish: by altering stream cover that cooled water temperatures and by elevating

turbidity Turbidity is the cloudiness or haziness of a fluid caused by large numbers of individual particles that are generally invisible to the naked eye, similar to smoke in air. The measurement of turbidity is a key test of both water clarity and wa ...

, with resulting covering of spawning

gravel Gravel () is a loose aggregation of rock fragments. Gravel occurs naturally on Earth as a result of sedimentation, sedimentary and erosion, erosive geological processes; it is also produced in large quantities commercially as crushed stone. Gr ...

s. Some lower reaches between Roberts Road and the Fairfield Osborn Preserve are still subject to overgrazing as of 2006. Overgrazing has also exacerbated stream bank

erosion Erosion is the action of surface processes (such as Surface runoff, water flow or wind) that removes soil, Rock (geology), rock, or dissolved material from one location on the Earth's crust#Crust, Earth's crust and then sediment transport, tran ...

, and led to invasive

forb A forb or phorb is a herbaceous flowering plant that is not a graminoid (grass, sedge, or rush). The term is used in botany and in vegetation ecology especially in relation to grasslands and understory. Typically, these are eudicots without woo ...

s and grasses supplanting the native

riparian A riparian zone or riparian area is the interface between land and a river or stream. In some regions, the terms riparian woodland, riparian forest, riparian buffer zone, riparian corridor, and riparian strip are used to characterize a ripar ...

vegetation. This alteration of native riparian growth has further reduced populations of avafauna,

amphibian Amphibians are ectothermic, anamniote, anamniotic, tetrapod, four-limbed vertebrate animals that constitute the class (biology), class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all Tetrapod, tetrapods, but excl ...

s and macro

invertebrate Invertebrates are animals that neither develop nor retain a vertebral column (commonly known as a ''spine'' or ''backbone''), which evolved from the notochord. It is a paraphyletic grouping including all animals excluding the chordata, chordate s ...

Ecology

Principal plant communities within the upper reaches include the dominant

California oak woodland California oak woodland is a plant community found throughout the California chaparral and woodlands ecoregion of California in the United States and northwestern Baja California in Mexico. Oak woodland is widespread at lower elevations in coast ...

, and also consist of

Douglas-fir The Douglas fir (''Pseudotsuga menziesii'') is an evergreen conifer species in the pine family, Pinaceae. It is the tallest tree in the Pinaceae family. It is native to western North America and is also known as Douglas-fir, Douglas spruce, Or ...

woodland A woodland () is, in the broad sense, land covered with woody plants (trees and shrubs), or in a narrow sense, synonymous with wood (or in the U.S., the '' plurale tantum'' woods), a low-density forest forming open habitats with plenty of sunli ...

and

riparian woodland A riparian forest or riparian woodland is a forested or wooded area of land adjacent to a body of water such as a river, stream, pond, lake, marshland, estuary, canal, sink, or reservoir. Due to the broad nature of the definition, riparian woodla ...

. Within the oak woodland the main tree species are

coast live oak ''Quercus agrifolia'', the California live oak, or coast live oak, is an evergreen live oak native to the California Floristic Province. Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and sheddi ...

, Oregon oak,

California black oak ''Quercus kelloggii'', the California black oak or Kellogg oak, is an oak in the red oak section (genus ''Quercus'', section ''Lobatae'', series ''Agrifoliae'') native to western North America. Description ''Quercus kelloggii'' grows from one ...

, canyon live oak and California bay laurel. The woodland

understory In forestry and ecology, understory (American English), or understorey (English in the Commonwealth of Nations, Commonwealth English), also known as underbrush or undergrowth, includes plant life growing beneath the Canopy (biology), forest ca ...

exhibits

toyon ''Heteromeles arbutifolia'' (, more commonly by Californian botanists), commonly known as toyon, is a perennial shrub native to Coastal California. It is the sole species in the genus ''Heteromeles''. Description Toyon typically grows from , r ...

, coffeeberry,

poison oak Poison oak refers to two plant species in the genus '' Toxicodendron,'' both of which can cause skin irritation: *'' Toxicodendron diversilobum'' or Pacific poison oak, found in western North America *'' Toxicodendron pubescens'' or Atlantic po ...

and numerous other flowering plants such as

snowberry ''Symphoricarpos'' is a small genus of about 15 species of deciduous shrubs in the family Caprifoliaceae. With the exception of the Chinese coralberry, ''Symphoricarpos sinensis, S. sinensis'', which is indigenous to western China, all species a ...

and the uncommon

American ginseng American ginseng (''Panax quinquefolius'') is a species of flowering plant in the ivy family (biology), family Araliaceae. It is native to eastern North America and has been introduced into China. The specific epithet ''quinquefolius'' means "fiv ...

. Upper reach wildlife includes the federally listed

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...

red-legged frog. Upper reaches of Copeland Creek have a very high percentage population of California bay laurel, and also provide

habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...

for a rich variety of

newt A newt is a salamander in the subfamily Pleurodelinae. The terrestrial juvenile phase is called an eft. Unlike other members of the family Salamandridae, newts are semiaquatic, alternating between aquatic and terrestrial habitats. Not all aqua ...

s and other

fauna Fauna (: faunae or faunas) is all of the animal life present in a particular region or time. The corresponding terms for plants and fungi are ''flora'' and '' funga'', respectively. Flora, fauna, funga and other forms of life are collectively ...

. The Pacific giant salamander, one of the largest known

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

salamander Salamanders are a group of amphibians typically characterized by their lizard-like appearance, with slender bodies, blunt snouts, short limbs projecting at right angles to the body, and the presence of a tail in both larvae and adults. All t ...

is observed hunting for

prey Predation is a biological interaction in which one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not ki ...

in upper Copeland Creek. Other amphibians seen in upper riparian habitats include the Pacific treefrog, ''Pseudacris regilla'' (formerly ''Hyla regilla''), rough skinned newt, ''Taricha granulosa'', and

California slender salamander The California slender salamander (''Batrachoseps attenuatus'') is a lungless salamanderRobert C. Stebbins, Stebbins, Robert C. (2003). ''A Field Guide to Western Reptiles and Amphibians'', 3rd Edition. Houghton Mifflin Company, that is found pr ...

, ''Batrachoseps attenuatus''.

Management

Oversight of Copeland Creek is by the Sonoma County Water Agency; in the year 2006 the Agency cleared

cattail ''Typha'' is a genus of about 30 species of monocotyledonous flowering plants in the family Typhaceae. These plants have a variety of common names, in British English as bulrushStreeter D, Hart-Davies C, Hardcastle A, Cole F, Harper L. 2009. ...

s and arroyo willow from certain lower reach portions of the creek in order to improve flow characteristics. As with any flood control management strategy, unintended environmental impacts can arise from stream channel modification. The Sonoma County General Plan Open Space Element calls for a Copeland Creek Trail along Copeland Creek to connect Rohnert Park near Sonoma State University to Crane Creek Regional Park. In addition, the 2003 County Outdoor Recreation Plan calls for a Copeland Creek Regional Park of about to be situated near Fairfield Osborn Preserve at elevation . Through the city of Rohnert Park, the creek is largely channelized. The Sonoma County Water Agency in partnership with the California Department of Fish and Game have developed a strategy for enhancing

spawning Spawn is the Egg cell, eggs and Spermatozoa, sperm released or deposited into water by aquatic animals. As a verb, ''to spawn'' refers to the process of freely releasing eggs and sperm into a body of water (fresh or marine); the physical act is ...

capability to the Russian River and a number of its tributaries; this activity was directed at the benefit of three

threatened A threatened species is any species (including animals, plants and fungi) which is vulnerable to extinction in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensatio ...

Coho salmon The coho salmon (''Oncorhynchus kisutch;'' Karuk: achvuun) is a species of anadromous fish in the salmon family (biology), family and one of the five Pacific salmon species. Coho salmon are also known as silver salmon (or "silvers") and is often ...

Chinook salmon The Chinook salmon (''Oncorhynchus tshawytscha'') is the largest and most valuable species of Oncorhynchus, Pacific salmon. Its common name is derived from the Chinookan peoples. Other vernacular names for the species include king salmon, quinn ...

and

steelhead Steelhead, or occasionally steelhead trout, is the Fish migration#Classification, anadromous form of the coastal rainbow trout or Columbia River redband trout (''O. m. gairdneri'', also called redband steelhead). Steelhead are native to cold-wa ...

. A Copeland Creek Restoration Project addressed the creek channel along approximately of Copeland Creek, which had been overgrazed by

cattle Cattle (''Bos taurus'') are large, domesticated, bovid ungulates widely kept as livestock. They are prominent modern members of the subfamily Bovinae and the most widespread species of the genus '' Bos''. Mature female cattle are calle ...

for over 100 years. Commencing in 1999, the project was implemented in four phases, the fourth and final phase of construction having been completed in the autumn of 2003. The project was designed to stabilize banks, decrease creek

, exclude cattle from the creek by fencing, and improve habitat for steelhead and other native

fish A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ...

and

wildlife Wildlife refers to domestication, undomesticated animals and uncultivated plant species which can exist in their natural habitat, but has come to include all organisms that grow or live wilderness, wild in an area without being species, introdu ...

. The outcome yielded a creek with less sediment load and a more natural undulation of channel, where an almost linear creek geometry had existed for the previously modified reach.

References

External links

Master Plan for a portion of lower Copeland Creek
{{Russian River Rivers of Sonoma County, California Sonoma Mountains Tributaries of the Russian River (California) Rivers of Northern California