A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, flat regions covered with wind-swept sand or dunes, with little or no vegetation, are called ergs or sand seas. Dunes occur in different shapes and sizes, but most kinds of dunes are longer on the stoss (upflow) side, where the sand is pushed up the dune, and have a shorter slip face in the lee side. The valley or trough between dunes is called a dune slack.
Sandboarding is a boardsport and extreme sport similar to snowboarding that involves riding across or down a sand dune while standing on a board, either with both feet strapped in or while standing loose, without bindings. Sandboarding can also be practised sitting down or lying on the belly or the back. It typically involves a sandboard, although it is also possible to use sleds, surfboards, a skateboard deck, or snowboards.
Guadalupe-Nipomo Dunes is the largest remaining dune system south of San Francisco and the second largest in the U.S. state of California. It encompasses an 18-mile (29 km) stretch of coastline on the Central Coast of California and extends from southern San Luis Obispo County to northern Santa Barbara County.
Ammophila arenaria is a species of grass in the family Poaceae. It is known by the common names marram grass and European beachgrass. It is one of two species of the genus Ammophila. It is native to the coastlines of Europe and North Africa where it grows in the sands of beach dunes. It is a perennial grass forming stiff, hardy clumps of erect stems up to 1.2 metres (3.9 ft) in height. It grows from a network of thick rhizomes which give it a sturdy anchor in its sand substrate and allow it to spread upward as sand accumulates. These rhizomes can grow laterally by 2 metres in six months. One clump can produce 100 new shoots annually.
Scythrididae is a family of small moths in the superfamily Gelechioidea. The family is sometimes included in the Xyloryctidae as a subfamily Scythridinae, but the Xyloryctidae themselves have sometimes been included in the Oecophoridae as subfamily. Scythrididae adults are smallish to mid-sized moths, which when at rest appear teardrop-shaped.
Sand dune stabilization is a coastal management practice designed to prevent erosion of sand dunes. Sand dunes are common features of shoreline and desert environments. Dunes provide habitat for highly specialized plants and animals, including rare and endangered species. They can protect beaches from erosion and recruit sand to eroded beaches. Dunes are threatened by human activity, both intentional and unintentional. Countries such as the United States, Australia, Canada, New Zealand, the United Kingdom, and Netherlands, operate significant dune protection programs.
Apodemia mormo langei, the Lange's metalmark butterfly, is an endangered North American butterfly. It is a subspecies of the Mormon metalmark and belongs to the family Riodinidae. The butterfly is endemic to California, where it is known from one strip of riverbank in the San Francisco Bay Area. A 2008 count estimated the total remaining population at 131 individuals. Since 2011, this number has dropped to about 25–30.
Gnorimoschema is a genus of moths in the family Gelechiidae.
Tolowa Dunes State Park is a 4,000-acre (16 km2) California State Park located in Del Norte County, on the North Coast of California.
A foredune is a dune ridge that runs parallel to the shore of an ocean, lake, bay, or estuary. Foredunes consist of sand deposited by wind on a vegetated part of the shore. Foredunes can be classified generally as incipient or established.
Caryocolum blandulella is a moth of the family Gelechiidae. It is found in Great Britain, the Netherlands, Spain, France, Germany, Denmark, Finland, Sweden, Switzerland, Italy, Croatia, Hungary, Greece and Ukraine, as well as Corsica. The habitat consists of coastal sand-dunes.
Monochroa elongella, the Pembroke neb, is a moth of the family Gelechiidae. It is widely distributed throughout Europe. Outside of Europe, it is found in southern Siberia. The habitat consists of coastal sand-dunes and chalk downland.
Scythris cicadella, the sand owlet, is a moth of the family Scythrididae found in Europe. It was first described by Philipp Christoph Zeller in 1839.
Scythris laminella is a moth of the family Scythrididae. It was described by Michael Denis and Ignaz Schiffermüller in 1775. It is found in most of Europe and Central Asia.
Scrobipalpa instabilella, the saltern groundling, is a moth in the family Gelechiidae. It was described by John William Douglas in 1846. It is found in on the Canary Islands, in Algeria, Ireland, Great Britain, Portugal, Spain, France, Belgium, the Netherlands, Germany, Denmark, Italy, Sardinia, Sicily, Greece, Cyprus and Palestine. It is also present in the United States, where it has been recorded from California.
Areniscythris is a genus of moths in the family Scythrididae.
Scythris tributella is a moth of the family Scythrididae. It was described by Philipp Christoph Zeller in 1847. It is found in central and southern Europe, North Africa (Libya) and Russia, Georgia, Turkey and Turkmenistan.
Scythris fuscicomella is a species of flower moth in the family Scythrididae.
Notoreas casanova is a species of moth in the family Geometridae. It is endemic to New Zealand. This species has been classified as Nationally Vulnerable by the Department of Conservation.
Asaphodes oraria is a species of moth in the family Geometridae. This species is endemic to New Zealand and has been observed in the southern South Island and on Stewart Island / Rakiura. The male is pale yellow coloured and the female has severely reduced wings and is flightless. The habitat of this species is tussock grasslands on coastal sand dunes and in the mountains at elevations of approximately 4,000ft. The larvae have adapted to feeding on exotic lawn daisy species in the genus Bellis. The adults of this species are on the wing from November to April.
