Mount Hood (California)
Mount Hood known as Hood Mountain is a mountain near the southeastern edge of Santa Rosa, California at the northeast of the Sonoma Valley and attains a height of 2,733 feet. The original name was Mount Wilikos, an Indian name meaning "willows." Most of the drainage from Mount Hood contributes to the headwaters of Sonoma Creek. A prominent feature is the extensive rock face visible on the upper half of the mountain as viewed from State Route 12; the habitats on the mountain include mixed oak forest, pygmy forest and riparian zones. In prehistoric times the slopes of Mount Hood were inhabited by a division of the Yuki tribe. Most of Mount Hood is within the Hood Mountain Regional Park maintained by Sonoma County. Mount Hood is part of the inner coast Mayacamas Range, lies within Sonoma County, with a part of the mountain geographically within Napa County. Mount Hood affords overlooks of the Pacific Ocean, San Francisco Bay and "a spectacular view east to the Sierra Nevada Range." Mount Hood is most accessed via State Route 12, which runs along the bottomland of the Sonoma Valley and connects the town of Sonoma to the city of Santa Rosa.
Closest viewing areas of Mount Hood from the valley floor are from the village of Kenwood, from the intersection of State Route 12 with Pythian Road, from the community of Oakmont, the easternmost neighborhood of Santa Rosa. From these viewing locations a volcanic rocky outcrop near the peak of Mount Hood known as Gunsight Point, is prominent on the Mayacmas ridgeline, along with Bald Mountain, within Sugarloaf Ridge State Park, itself located three miles east. Mount Hood is visible from the floor of the Napa Valley as well as eastern slopes above that valley. From the summit there are expansive views westerly to Annadel State Park and beyond to Sonoma Mountain. On clear days there are distant views westerly to the Pacific Ocean and easterly to the Sierra Nevada Mountains; the base of Mount Hood consists of soils of the Goulding-Toomes-Guenoc association, which are well-drained to steep loams and clay-loams situated upon upland formations. The upper reaches consist of the Kidd-Forward-Cohasset association, which group ranges from well-drained to excessively drained moderate to steep gravelly and stony loams.
Specific soil map patches on the upper slopes include Boomer loam on some 15 to 30 percent slopes. Considering the steepness of much of the terrain there is a remarkable lack of erosion because human access has been low, vegetative cover has been kept intact; the headwaters of Santa Rosa Creek rise on the northern slopes of Mount Hood, whereas the central and eastern portions of the mountain contribute to the watershed of Sonoma Creek which rises in the Sugarloaf area. Hood Creek and Graywood Creek, draining portions of Mount Hood, are smaller tributaries that feed Sonoma Creek. Precipitation amounts to 30 inches per annum on Mount Hood. There are several distinct habitats in the Mount Hood area including: Mixed oak woodland Chaparral Pygmy forest Riparian zoneIn addition there is a specialized habitat on the upper western face consisting of extensive rock outcrops, which can be considered a variant of the chaparral habitat with small forest pockets; the mixed oak woodland habitat dominates the lower elevations with coast live oak, Douglas fir, California buckeye and bigleaf maple forming the majority of the canopy.
The understory is sparse of the deep ravine areas such as Hood Creek riparian zones. Some toyon, poison oak and hollyleaf cherry are found beneath the canopy. At mid-level elevations there are considerable numbers of tanbark oak and Pacific madrone contributing to the canopy. Chaparral areas are dominated by several varieties of manzanita, including notably Arctostaphylos manzanita'Mount Hood'. There is a considerable abundance of poison oak and coyote brush present in these exposed rocky thin soil habitats. Fire risk is greatest in this ecosystem, some evidence of fires are seen at an estimated age of twenty years past. There are sizable pygmy forest areas on the west facing slopes and more level inner plateaus of Mount Hood. Here the predominant species are Sargent various Arctostaphylos species and coyote brush; the Sargent cypress were misidentified as Mendocino cypress, which would be far out of their native range here. The height of the pygmy forest is ten to fifteen feet and these patches of dense thickets extend for about a half to one and a half miles in patch size.
The riparian zones tend to occur in deep forested ravine areas that are shaded. These steep woodlands have a high percentage of California laurel trees, understory ferns and toyons. Several of the streams such as Sonoma Creek, Hood Creek and Santa Rosa Creek are year-round flowing, except for the highest reaches. Considerable bird life occurs in the Mount Hood environment, but in the riparian zones scrub jay and juncos are apparent. Mountain lions and rattlesnakes may be found throughout the area, with the snakes preferring west facing sun-exposed rocky slopes. Trails leading to the summit of Mount Hood begin at three locations: Along Adobe Canyon Road within adjacent Sugarloaf Ridge State Park, on the southeast side of the mountain At the end of Pythian Road, on the west side At the end of Los Alamos Road, on the north sideTrails leading from the first two trailheads involve direct climbs
In ecology, a habitat is the type of natural environment in which a particular species of organism lives. It is characterized by both biological features. A species' habitat is those places where it can find food, shelter and mates for reproduction; the physical factors are for example soil, range of temperature, light intensity as well as biotic factors such as the availability of food and the presence or absence of predators. Every organism has certain habitat needs for the conditions in which it will thrive, but some are tolerant of wide variations while others are specific in their requirements. A habitat is not a geographical area, it can be the interior of a stem, a rotten log, a rock or a clump of moss, for a parasitic organism it is the body of its host, part of the host's body such as the digestive tract, or a single cell within the host's body. Habitat types include polar, temperate and tropical; the terrestrial vegetation type may be forest, grassland, semi-arid or desert. Fresh water habitats include marshes, rivers and ponds, marine habitats include salt marshes, the coast, the intertidal zone, reefs, the open sea, the sea bed, deep water and submarine vents.
Habitats change over time. This may be due to a violent event such as the eruption of a volcano, an earthquake, a tsunami, a wildfire or a change in oceanic currents. Other changes come as a direct result of human activities; the introduction of alien species can have a devastating effect on native wildlife, through increased predation, through competition for resources or through the introduction of pests and diseases to which the native species have no immunity. The word "habitat" has been in use since about 1755 and derives from the Latin habitāre, to inhabit, from habēre, to have or to hold. Habitat can be defined as the natural environment of an organism, the type of place in which it is natural for it to live and grow, it is similar in meaning to a biotope. The chief environmental factors affecting the distribution of living organisms are temperature, climate, soil type and light intensity, the presence or absence of all the requirements that the organism needs to sustain it. Speaking, animal communities are reliant on specific types of plant communities.
Some plants and animals are generalists, their habitat requirements are met in a wide range of locations. The small white butterfly for example is found on all the continents of the world apart from Antarctica, its larvae feed on a wide range of Brassicas and various other plant species, it thrives in any open location with diverse plant associations. The large blue butterfly is much more specific in its requirements. Disturbance is important in the creation of biodiverse habitats. In the absence of disturbance, a climax vegetation cover develops that prevents the establishment of other species. Wildflower meadows are sometimes created by conservationists but most of the flowering plants used are either annuals or biennials and disappear after a few years in the absence of patches of bare ground on which their seedlings can grow. Lightning strikes and toppled trees in tropical forests allow species richness to be maintained as pioneering species move in to fill the gaps created. Coastal habitats can become dominated by kelp until the seabed is disturbed by a storm and the algae swept away, or shifting sediment exposes new areas for colonisation.
Another cause of disturbance is when an area may be overwhelmed by an invasive introduced species, not kept under control by natural enemies in its new habitat. Terrestrial habitat types include forests, grasslands and deserts. Within these broad biomes are more specific habitats with varying climate types, temperature regimes, soils and vegetation types. Many of these habitats grade into each other and each one has its own typical communities of plants and animals. A habitat may suit a particular species well, but its presence or absence at any particular location depends to some extent on chance, on its dispersal abilities and its efficiency as a coloniser. Freshwater habitats include rivers, lakes, ponds and bogs. Although some organisms are found across most of these habitats, the majority have more specific requirements; the water velocity, its temperature and oxygen saturation are important factors, but in river systems, there are fast and slow sections, pools and backwaters which provide a range of habitats.
Aquatic plants can be floating, semi-submerged, submerged or grow in permanently or temporarily saturated soils besides bodies of water. Marginal plants provide important habitat for both invertebrates and vertebrates, submerged plants provide oxygenation of the water, absorb nutrients and play a part in the reduction of pollution. Marine habitats include brackish water, bays, the open sea, the intertidal zone, the sea bed and deep / shallow water zones. Further variations include rock pools, sand banks, brackish lagoons and pebbly beaches, seagrass beds, all supporting their own flora and fauna; the benth
A grape is a fruit, botanically a berry, of the deciduous woody vines of the flowering plant genus Vitis. Grapes can be eaten fresh as table grapes or they can be used for making wine, juice, grape seed extract, raisins and grape seed oil. Grapes are a non-climacteric type of fruit occurring in clusters; the cultivation of the domesticated grape began 6,000–8,000 years ago in the Near East. Yeast, one of the earliest domesticated microorganisms, occurs on the skins of grapes, leading to the discovery of alcoholic drinks such as wine; the earliest archeological evidence for a dominant position of wine-making in human culture dates from 8,000 years ago in Georgia. The oldest known winery was found in Armenia, dating to around 4000 BC. By the 9th century AD the city of Shiraz was known to produce some of the finest wines in the Middle East, thus it has been proposed that Syrah red wine is named after Shiraz, a city in Persia where the grape was used to make Shirazi wine. Ancient Egyptian hieroglyphics record the cultivation of purple grapes, history attests to the ancient Greeks and Romans growing purple grapes for both eating and wine production.
The growing of grapes would spread to other regions in Europe, as well as North Africa, in North America. In North America, native grapes belonging to various species of the genus Vitis proliferate in the wild across the continent, were a part of the diet of many Native Americans, but were considered by early European colonists to be unsuitable for wine. In the 19th century, Ephraim Bull of Concord, cultivated seeds from wild Vitis labrusca vines to create the Concord grape which would become an important agricultural crop in the United States. Grapes are a type of fruit that grow in clusters of 15 to 300, can be crimson, dark blue, green and pink. "White" grapes are green in color, are evolutionarily derived from the purple grape. Mutations in two regulatory genes of white grapes turn off production of anthocyanins, which are responsible for the color of purple grapes. Anthocyanins and other pigment chemicals of the larger family of polyphenols in purple grapes are responsible for the varying shades of purple in red wines.
Grapes are an ellipsoid shape resembling a prolate spheroid. Most grapes come from cultivars of Vitis vinifera, the European grapevine native to the Mediterranean and Central Asia. Minor amounts of fruit and wine come from American and Asian species such as: Vitis amurensis, the most important Asian species Vitis labrusca, the North American table and grape juice grapevines, sometimes used for wine, are native to the Eastern United States and Canada. Vitis mustangensis, found in Mississippi, Louisiana and Oklahoma Vitis riparia, a wild vine of North America, is sometimes used for winemaking and for jam, it is native to the entire Eastern U. S. and north to Quebec. Vitis rotundifolia used for jams and wine, are native to the Southeastern United States from Delaware to the Gulf of Mexico. According to the Food and Agriculture Organization, 75,866 square kilometers of the world are dedicated to grapes. 71% of world grape production is used for wine, 27% as fresh fruit, 2% as dried fruit. A portion of grape production goes to producing grape juice to be reconstituted for fruits canned "with no added sugar" and "100% natural".
The area dedicated to vineyards is increasing by about 2% per year. There are no reliable statistics, it is believed that the most planted variety is Sultana known as Thompson Seedless, with at least 3,600 km2 dedicated to it. The second most common variety is Airén. Other popular varieties include Cabernet Sauvignon, Sauvignon blanc, Cabernet Franc, Grenache, Tempranillo and Chardonnay. Commercially cultivated grapes can be classified as either table or wine grapes, based on their intended method of consumption: eaten raw or used to make wine. While all of them belong to the same species, Vitis vinifera and wine grapes have significant differences, brought about through selective breeding. Table grape cultivars tend to have large, seedless fruit with thin skin. Wine grapes are smaller seeded, have thick skins. Wine grapes tend to be sweet: they are harvested at the time when their juice is 24% sugar by weight. By comparison, commercially produced "100% grape juice", made from table grapes, is around 15% sugar by weight.
Seedless cultivars now make up the overwhelming majority of table grape plantings. Because grapevines are vegetatively propagated by cuttings, the lack of seeds does not present a problem for reproduction, it is an issue for breeders, who must either use a seeded variety as the female parent or rescue embryos early in development using tissue culture techniques. There are several sources of the seedlessness trait, all commercial cultivators get it from one of three sources: Thompson Seedless, Russian Seedless, Black Monukka, all being cultivars of Vitis vinifera. There are more than a dozen varieties of seedless grapes. Several, such as Einset Seedless, Benjamin Gunnels's Prime seedless grapes and Venus, have been cultivated for hardiness and quality in the cold climates of northeastern United States and southern Ontario. An offset to the improved eating quality of seedlessness is the loss of potential health benefits provided by the enriched phytochemical conten
A stream is a body of water with surface water flowing within the bed and banks of a channel. The stream encompasses surface and groundwater fluxes that respond to geological, geomorphological and biotic controls. Depending on its location or certain characteristics, a stream may be referred to by a variety of local or regional names. Long large streams are called rivers. Streams are important as conduits in the water cycle, instruments in groundwater recharge, corridors for fish and wildlife migration; the biological habitat in the immediate vicinity of a stream is called a riparian zone. Given the status of the ongoing Holocene extinction, streams play an important corridor role in connecting fragmented habitats and thus in conserving biodiversity; the study of streams and waterways in general is known as surface hydrology and is a core element of environmental geography. Brook A stream smaller than a creek one, fed by a spring or seep, it is small and forded. A brook is characterised by its shallowness.
Creek In North America and New Zealand, a small to medium-sized natural stream. Sometimes navigable by motor craft and may be intermittent. In parts of Maryland, New England, the UK and India, a tidal inlet in a salt marsh or mangrove swamp, or between enclosed and drained former salt marshes or swamps. In these cases, the stream is the tidal stream, the course of the seawater through the creek channel at low and high tide. River A large natural stream, which may be a waterway. Runnel the linear channel between the parallel ridges or bars on a shoreline beach or river floodplain, or between a bar and the shore. Called a swale. Tributary A contributory stream, or a stream which does not reach a static body of water such as a lake or ocean, but joins another river. Sometimes called a branch or fork. There are a number of regional names for a stream. Allt is used in Highland Scotland. Beck is used in Lincolnshire to Cumbria in areas which were once occupied by the Danes and Norwegians. Bourne or winterbourne is used in the chalk downland of southern England.
Brook. Burn is used in North East England. Gill or ghyll is seen in Surrey influenced by Old Norse; the variant "ghyll" is used in the Lake District and appears to have been an invention of William Wordsworth. Nant is used in Wales. Rivulet is a term encountered in Victorian era publications. Stream Syke is used in lowland Cumbria for a seasonal stream. Branch is used to name streams in Virginia. Creek is common throughout the United States, as well as Australia. Falls is used to name streams in Maryland, for streams/rivers which have waterfalls on them if such falls have a small vertical drop. Little Gunpowder Falls and The Jones Falls are rivers named in this manner, unique to Maryland. Kill in New York, Pennsylvania and New Jersey comes from a Dutch language word meaning "riverbed" or "water channel", can be used for the UK meaning of'creek'. Run in Ohio, Michigan, New Jersey, Virginia, or West Virginia can be the name of a stream. Run in Florida is the name given to streams coming out of small natural springs.
River is used for larger springs like the Silver Rainbow River. Stream and brook are used in Midwestern states, Mid-Atlantic states, New England. Bar A shoal that develops in a stream as sediment is deposited as the current slows or is impeded by wave action at the confluence. Bifurcation A fork into two or more streams. Channel A depression created by constant erosion. Confluence The point at which the two streams merge. If the two tributaries are of equal size, the confluence may be called a fork. Drainage basin The area of land. A large drainage basin such as the Amazon River contains many smaller drainage basins. Floodplain Lands adjacent to the stream that are subject to flooding when a stream overflows its banks. Gaging station A site along the route of a stream or river, used for reference marking or water monitoring. Headwaters The part of a stream or river proximate to its source; the word is most used in the plural where there is no single point source. Knickpoint The point on a stream's profile where a sudden change in stream gradient occurs.
Mouth The point at which the stream discharges via an estuary or delta, into a static body of water such as a lake or ocean. Pool A segment where the water is deeper and slower moving. Rapids A turbulent, fast-flowing stretch of a stream or river. Riffle A segment where the flow is shallower and more turbulent. River A large natural stream, which may be a waterway. Run A somewhat smoothly flowing segment of the stream. Source The spring, or other point of origin of a stream. Spring The point at which a stream emerges from an underground course through unconsolidated sediments or through caves. A stream can with caves, flow aboveground for part of its course, underground for part of its course. Stream bed The bottom of a stream. Stream corridor Stream, its floodplains, the transitional upland fringe Streamflow The water moving through a stream channel. Thalweg The river's longitudinal section, or the line joining the deepest point in the channel at each stage from source to mouth. Waterfall or cascade The fall of water where the stream goes over a sudden drop called a knickpoint.
The stream expends kinetic energy in "trying" to eliminate the
Viticulture or winegrowing is the cultivation and harvesting of grapes. It is a branch of the science of horticulture. While the native territory of Vitis vinifera, the common grape vine, ranges from Western Europe to the Persian shores of the Caspian Sea, the vine has demonstrated high levels of adaptability to new environments. For this reason, viticulture can be found on every continent except Antarctica. Duties of the viticulturist include monitoring and controlling pests and diseases, irrigation, canopy management, monitoring fruit development and characteristics, deciding when to harvest, vine pruning during the winter months. Viticulturists are intimately involved with winemakers, because vineyard management and the resulting grape characteristics provide the basis from which winemaking can begin. A great number of varieties are now approved in the European Union as true grapes for winegrowing and viticulture; the earliest evidence of grape vine cultivation and winemaking dates back 7,000 years.
The history of viticulture is related to the history of wine, with evidence that humans cultivated wild grapes to make wine as far back as the Neolithic period. Evidence suggests that some of the earliest domestication of Vitis vinifera occurred in the area of the modern countries Georgia and Armenia; the oldest-known winery was discovered in the "Areni-1" cave in Armenia. Dated to c. 4100 BC, the site contained a wine press, fermentation vats and cups. Archaeologists found V. vinifera seeds and vines. Commenting on the importance of the find, McGovern said, "The fact that winemaking was so well developed in 4000 BC suggests that the technology goes back much earlier." There is evidence of grape domestication in the Near East in the early Bronze Age, around 3200 BC. Evidence of ancient viticulture is provided by cuneiform sources, plant remains, historical geography, archaeological excavations; the remnants of ancient wine jars have been used to determine the culture of wine consumption and cultivated grape species.
In addition to winemaking, grapes have been grown for the production of raisins. The earliest act of cultivation appears to have been the favoring of hermaphroditic members of the Vitis vinifera species over the barren male vines and the female vines, which were dependent on a nearby male for pollination. With the ability to pollinate itself, over time the hermaphroditic vines were able to sire offspring that were hermaphroditic. At the end of the 5th century BC, the Greek historian Thucydides wrote: The period that Thucydides was most referencing was the time between 3000 BC and 2000 BC, when viticulture emerged in force in Asia Minor and the Cyclades Islands of the Aegean Sea. During this period, grape cultivation developed from an aspect of local consumption to an important component of international economies and trade. From 1200 BC to 900 BC, the Phoenicians developed viticulture practices that were used in Carthage. Around 500 BC, the Carthaginian writer Mago recorded such practices in a two-volume work, one of the few artifacts to survive the Roman destruction of Carthage during the Third Punic War.
The Roman statesman Cato the Elder was influenced by these texts, around 160 BC he wrote De Agricultura, which expounded on Roman viticulture and agriculture. Around 65 AD, the Roman writer Columella produced the most detailed work on Roman viticulture in his twelve-volume text De Re Rustica. Columella's work is one of the earliest to detail trellis systems for raising vines off the ground. Columella advocated the use of stakes versus the accepted practice of training vines to grow up along tree trunks; the benefits of using stakes over trees was to minimize the dangers associated with climbing trees, necessary to prune the dense foliage in order to give the vines sunlight, to harvest them. Roman expansion across Western Europe brought Roman viticulture to the areas that would become some of the world's best-known winegrowing regions: the Spanish Rioja, the German Mosel, the French Bordeaux, Burgundy and Rhône. Roman viticulturists were among the first to identify steep hillsides as one of the better locations to plant vines, because cool air runs downhill and gathers at the bottom of valleys.
While some cool air is beneficial, too much can rob the vine of the heat it needs for photosynthesis, in winter it increases the risk of frost. In the Middle Ages, Catholic monks were the most prominent viticulturists of the time period. Around this time, an early system of Metayage emerged in France with laborers working the vineyards under contractual agreements with the landowners. In most cases, the prendeurs were given flexibility in selecting their crop and developing their own vineyard practice. In northern Europe, the weather and climate posed difficulties for grape cultivation, so certain species were selected that better suited the environment. Most vineyards grew white varieties of grape, which are more resistant to the damp and cold climates. A few species of red grape, such as the Pinot Noir, were introduced. Les Très Riches Heures du duc de Berry dates back to 1416 and depicts horticulture and viticulture in France; the images illustrate peasants bending down to prune grapes from vines behind castle walls.
Additional illustrations depict grape vines being harvested, with each vine being cut to three spurs around knee height. Many of the viticultural practices developed in this time period would become staples of European viticulture until the 18th century. Varietals were studied more intently to see which vines were the most suitable for a particular area. Around this
In biology, the canopy is the aboveground portion of a plant community or crop, formed by the collection of individual plant crowns. In forest ecology, canopy refers to the upper layer or habitat zone, formed by mature tree crowns and including other biological organisms. Sometimes the term canopy is used to refer to the extent of the outer layer of leaves of an individual tree or group of trees. Shade trees have a dense canopy that blocks light from lower growing plants. Canopy structure is the spatial arrangement of a plant canopy. Leaf Area Index, leaf area per unit ground area, is a key measure used to understand and compare plant canopies, it is taller than the understory layer. Dominant and co-dominant canopy trees form the uneven canopy layer. Canopy trees are able to photosynthesize rapidly due to abundant light, so it supports the majority of primary productivity in forests; the canopy layer provides protection from strong winds and storms, while intercepting sunlight and precipitation, leading to a sparsely vegetated understory layer.
Forest canopies are home to unique fauna not found in other layers of forests. The highest terrestrial biodiversity resides in the canopy of tropical rainforests. Many rainforest animals have evolved to live in the canopy, never touch the ground; the canopy of a rainforest is about 10m thick, intercepts around 95% of sunlight. The canopy is below the emergent layer, a sparse layer of tall trees one or two per hectare. With an abundance of water and a near ideal temperature in rainforests and nutrients are two factors that limit tree growth from the understory to the canopy. In the permaculture and forest gardening community, the canopy is the highest of seven layers. Canopy Canopy research Canopy walkway Hemispherical photography Stratification Treefall gap Wildfire Crown shyness Tropical forest Rainforest size-asymmetric competition Lowman, M. D. and H. B. Rinker. 2004. Forest Canopies. Academic Press. ISBN 0-12-457553-6, ISBN 978-0-12-457553-0 Moffett, M. W. 1994. The High Frontier: Exploring the Tropical Rainforest Canopy.
Harvard University Press, Cambridge, MA. Russell, G. B. Marshall, P. G. Jarvis. 1990. Plant Canopies: Their Growth and Function. Cambridge University Press. ISBN 0-521-39563-1, ISBN 978-0-521-39563-2 International Canopy Access Network
Bennett Mountain commonly known as Bennett Peak, is a 1,909-foot summit in the Sonoma Mountains of California. Located on the west edge of Annadel State Park, it separates Bennett Valley in the Russian River drainage basin from Sonoma Valley in the Sonoma Creek drainage basin. Bennett Valley was named for James N. Bennett, an emigrant from Illinois who settled in the area in the 19th century; the mountain was burned following the October 2017 Northern California wildfires. Grapes were planted on Bennett Mountain as early as 1862, when Isaac DeTurk planted 30 acres at the base of its western slope. By 1878 he was producing 100,000 US gallons of wine from his own and purchased grapes at a winery on Grange and Bennett Valley roads. Since 2003, the summit has formed the eastern edge of the Bennett Valley AVA. Ledson Marsh List of summits of the San Francisco Bay Area Sonoma Mountain Taylor Mountain "Bennett Mountain". Geographic Names Information System. United States Geological Survey. Retrieved 2009-07-02