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	Younger Dryas (Site not responding. Last check: 2007-10-07)
		The Younger Dryas stadial, named after the alpine / tundra wildflower Dryas octopetala, and also referred to as the Big Freeze [1], was a brief cold climate period following the Bölling/Allerød interstadial at the end of the Pleistocene, and preceding the Preboreal of the early Holocene.
		The Younger Dryas saw a rapid return to glacial conditions in the higher latitudes of the Northern Hemisphere between 12,900 – 11,500 years before present (BP)[2]in sharp contrast to the warming of the preceding interstadial deglaciation.
		The prevailing theory holds that the Younger Dryas was caused by a significant reduction or shutdown of the North Atlantic thermohaline circulation in response to a sudden influx of fresh water from deglaciation in North America.
	hallencyclopedia.com /Younger_Dryas (859 words)

	Station Information - Younger Dryas
		The Younger Dryas was a sudden cold climate period lasting for about 1100-1300 calendar years during the final deglaciation of the Pleistocene.
		The prevailing theory holds that the Younger Dryas was caused by the shutdown of the Gulf Stream in response to a sudden influx of fresh water from deglaciation in North America.
		Replacement of forest in Scandinavia with glacial tundra (which is the habitat of the dryas plant).
	www.stationinformation.com /encyclopedia/y/yo/younger_dryas.html (244 words)

	NEERLANDs Tuin - Dryas (Site not responding. Last check: 2007-10-07)
		De plant is in grote aantallen te vinden in Noorwegen, Zweden, Finland, de bergachtige delen van Engeland en Ierland en de hogere, vochtige bergdelen van de Alpen.
		Het is meer een kruipend heestertje dan een vaste plant, is bodembedekkend en vormt groenbijvende matten van circa tien centimeter hoog en wordt op den duur ruim één meter breed.
		Naast Dryas octopetala is er een variëteit met een tweezijdig, viltig blad: (Dryas octopetala var.
	www.neerlandstuin.nl /plantenc/dryas.html (282 words)

	Younger Dryas - Wikipedia, the free encyclopedia
		The Younger Dryas saw a rapid return to glacial conditions in the higher latitudes of the Northern Hemisphere between 12,900 – 11,500 years before present (BP)[2] in sharp contrast to the warming of the preceding interstadial deglaciation.
		In the UK, coleopteran (fossil beetle) evidence suggests mean annual temperature dropped to approximately -5 °C [4], and periglacial conditions prevailed in lowland areas, while icefields and glaciers formed in upland areas [5].
		Replacement of forest in Scandinavia with glacial tundra (which is the habitat of the plant Dryas octopetala).
	en.wikipedia.org /wiki/Younger_Dryas (769 words)

	Encyclopedia: Younger-Dryas
		The Mountain Avens or White Dryas (Dryas octopetala L.) is a alpine and arctic flower of Eurasia.
		Although the Younger Dryas had the greatest effect in Europe, it was noted throughout the world including: World map showing location of Europe A satellite composite image of Europe Europe is geologically and geographically a peninsula, forming the westernmost part of Eurasia.
		The end of the Younger Dryas has been dated to around 9600 BC (11550 calendar years BP, occurring at 10000 radiocarbon years BP, a "radiocarbon plateau") by a variety of methods, with mostly consistent results: Raw radiocarbon measurements are usually reported as years before present (BP).
	www.nationmaster.com /encyclopedia/Younger_Dryas (1421 words)

	Plant Life in the Scottish Highlands - The Mountain Pastures--Plants of the Rocks and Screes (Site not responding. Last check: 2007-10-07)
		This plant is found chiefly in the north-west Highlands and in the north, especially where limestone is found.
		This is very important to the welfare of a plant growing in regions where good soil is scarce and each inch of soil must be fought for and held.
		Of these two plants the Alpine Rock Cress (Arabis alpina) is a very rare mountain plant found on dry, rocky ledges of the Coolin Mountains of Skye, and the Northern Rock Cress (Arabis petraea) is fairly common in the western and northern Highlands.
	www.scotkids.com /gardening/plantlife/chapter7.htm (4295 words)

	Dryas (plant) -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-07)
		Dryas (plant) -- Facts, Info, and Encyclopedia article
		The genus is named after the Greek nymph (Mountain avens) Dryas.
		The flowers are white with a yellow centre (Dryas integrifolia, (Creeping evergreen shrub with large white flowers; widely distributed in northern portions of Eurasia and North America) Dryas octopetala) or all-yellow (Dryas drummondii), and held conspicuously above the small plants.
	www.absoluteastronomy.com /encyclopedia/d/dr/dryas_(plant).htm (88 words)

	Institute of Plant Ecology - Christoph Lünterbusch (Site not responding. Last check: 2007-10-07)
		Dryas integrifolia is treated by many authors as a species indicating dry, calcareous habitats growing in vegetation types belonging to the Carici-Kobresietea class.
		Dryas integrifolia is found together with hygrophytic mire species like Eriophorum angustifolium and moreover in steppe-like habitats side by side with xerophytic species like Carex supina.
		Diverse courses in vascular plant indification, geobotany, lichenology and bryology, plantecological excursions
	www.uni-muenster.de /Biologie/pflanzenoekologie/staff/luenterb.htm (403 words)

	Dryas: Definition and Links by Encyclopedian.com - All about Dryas
		When Lycurgus heard that Dionysus was in his kingdom, imprisoned all the followers of Dionysus, the Maenads.
		Dionysus made King Lycurgus insane, and he sliced his own son, Dryas, into pieces with an axe, thinking he was a patch of ivy[?], a plant holy to Dionysus.
		An oracle then claimed that the land would stay dry and barren as long as Lycurgus was alive.
	www.encyclopedian.com /dr/Dryas.html (123 words)

	Dryas (plant) Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-10-07)
		The species are superficially similar to Geum, Potentilla and Fragaria, but are distinct in having flowers with eight petals (rarely seven or up to ten), instead of the five petals found in most other genera in the Rosaceae.
		The classification of Dryas within the Rosaceae is presently unclear.
		The genus was originally placed in the subfamily Rosoideae, and later in subfamily Dryadeae along with the genera Chamaebatia, Cowania and Cercocarpus, all four genera sharing root nodules that host the nitrogen-fixing bacterium Frankia.
	www.karr.net /search/encyclopedia/Dryas_%28plant%29 (368 words)

	ADW: Microgale dryas: Information
		dryas is solely terrestrial and occupies this dense habitat.
		dryas is unknown, the reproductive behaviors of other members of the genus Microgale are described below.
		dryas because it is rarely seen and is critically endangered.
	animaldiversity.ummz.umich.edu /site/accounts/information/Microgale_dryas.html (1156 words)

	The seeds of domestication
		The so-called "Younger Dryas" period is known from reliable climate records from ice cores from Greenland.
		He thinks domestication actually occurred in the Levant -- the western end of the Crescent -- because domesticable wild grains were absent from the rest of the area during the Younger Dryas.
		Carbonized plant remains show that the essential wild relatives were present only in modern Israel, Syria and Turkey.
	whyfiles.org /122ancient_ag/2.html (632 words)

	Rosaceae Terms and Definitions at www.MedicalGlossary.org
		Eriobotrya - A plant genus of the family ROSACEAE that is the source of an edible fruit.
		Fragaria - A plant genus of the family ROSACEAE known for the edible fruit.
		Pyracantha - A plant genus of the family ROSACEAE widely cultivated as a prickly hedge with bright red berries.
	www.medicalglossary.org /rosales_rosaceae_definitions.html (480 words)

	Rumex -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-07)
		The basal leaves may be different from those near the (The flowering part of a plant or arrangement of flowers on a stalk) inflorescence.
		The inconspicuous (A plant cultivated for its blooms or blossoms) flowers are carried above the leaves in whorl-like clusters.
		Most of them contain (A toxic colorless crystalline organic acid found in oxalis and other plants; used as a bleach and rust remover and in chemical analysis) oxalic acid and (Any of various complex phenolic substances of plant origin; used in tanning and in medicine) tannin.
	www.absoluteastronomy.com /encyclopedia/R/Ru/Rumex.htm (541 words)

	ROCKY MOUNTAIN ALPINE
		Like the arctic tundra, it is characterized by the absence of trees, the short stature of plants, and a low annual mean temperature.
		The area is floristically diverse with over 422 species of alpine plants which has been attributed to the 1) expansiveness, 2) east-west orientation with many moist N-facing slopes, 3) dissection of north-south migration routes, 4) high elevations which escaped glaciation, 5) variety of soil types, and 6) the relative accessibility.
		Alpine ectomycorrhizal fungi are primarily agarics (gilled mushrooms) mutualistic with alpine plants such as dwarf willow (Salix reticulata, Salix arctica), shrubby willow (Salix planifolia, Salix glauca), bogbirch (Betula gladulosa), and the mat plant Dryas octopetala, although other plants are implicated.
	plantsciences.montana.edu /alpinemushrooms/rocky_mountain_alpine_field_sites.htm (615 words)

	Dryas
		"Dryas" is a common misspelling or typo for: Dries, Dryad, Dryads.
		"Dryas" is generally used as a noun (proper) -- approximately 100.00% of the time.
		"Dryas" is used about 2 times out of a sample of 100 million words spoken or written in English.
	www.websters-online-dictionary.org /Dr/Dryas.html (494 words)

	Dryas (plant) - Encyclopedia, History, Geography and Biography
		Dryas (plant) - Encyclopedia, History, Geography and Biography
		The genus is named after the Greek nymph Dryas.
		They are closely related to Geum, Potentilla and Fragaria, but are distinct in having flowers with eight petals (rarely seven or up to ten), instead of the five petals found in most other genera in the Rosaceae.
	www.arikah.com /encyclopedia/Dryas_%28plant%29 (163 words)

	Plant Detail: Dryas integrifolia
		Urban Oasis, Stewards in the City, and Eco Superior are specific Evergreen programs that some plants are used in.
		The Native Plant Database is created by volunteers who do their best to add accurate information to the database.
		We cannot guarantee the accuracy of the information and we are not responsible for any errors in the information or for any adverse effects relating to the use of the plants or the information.
	www.evergreen.ca /nativeplants/search/view-plant.php?ID=02696 (156 words)

	Plant Profile for Dryas octopetala (eightpetal mountain-avens) (Site not responding. Last check: 2007-10-07)
		Dryas octopetala L. See county distributions for the following states by clicking on them below or on the map.
		Dryas octopetala L. View 68 genera in Rosaceae, 3 species in Dryas or click below on a thumbnail map or name for subspecies profiles.
		Dryas octopetala L. Click on a scientific name below to expand it in the PLANTS Classification Report.
	plants.usda.gov /cgi_bin/plant_profile.cgi?symbol%3DDROC (246 words)

	NOLS - The response of arctic tundra plant communities to human trampling disturbance
		A four-year study was conducted to evaluate the consequences of human trampling on dryas and tussock tundra plant communities.
		Immediately after and one and four years after trampling, plots were evaluated on the basis of plant species cover, percent bare ground, vegetation height, and soil penetration resistance.
		Immediately after trampling, 500 trampling passes resulted in approximately 50% cover loss in the dryas tundra and 70% cover loss in tussock tundra, but both communities showed a substantial capacity for regrowth.
	www.nols.edu /resources/research/Monz_etal.1994b.shtml (269 words)

	Ecoscience
		Dryas appears to function as a nurse plant primarily for bryophytes, and mainly at the most severe sites in Svalbard.
		Species composition, however, differed inside and outside Dryas in all the communities, due to both presence/absence and abundance differences at Finse, and primarily due to differences in species abundances in Svalbard.
		This may suggest that Dryas functions as a nurse plant for individual species of all of the three functional groups in all the communities, even if competitive impacts of Dryas may overrule the positive effects on a whole-community level.
	www.ecoscience.ulaval.ca /catalogue/E_detail.php?retour=65&id=689 (268 words)

	John Rogers
		Both marine and land animals and plants appear farther north in the northern hemisphere than they did 50 years ago, and plants bloom one or more weeks earlier than in the past.
		They include: the absence of wheels, possibly as a result of the lack of pack animals; lack of writing; lack of metals except as ornaments; and absence of any fuel except wood.
		The types of plants and animals in the Americas were also very different from those in the rest of the world with food such as corn, most varieties of beans, potatoes, tomatoes, and turkeys.
	www.geosci.unc.edu /faculty/rogers/climate.html (2336 words)

	Paleoclimatology
		For example, the presence of tropical plant and animal remains at the polar latitudes indicate that significantly warmer conditions must have existed as compared to today.
		Plants are directly affected by climate, and vegetation changes in turn are important for animals that feed on them.
		During most of this long period of time, and certainly from about 150 to 50 Ma, there is little evidence for ice sheets of continental scale, and subtropical plants and animals lived far poleward (almost 55-60° latitude) of their present limit of about 30°--the latitude of northern Florida.
	www.lakepowell.net /sciencecenter/paleoclimate.htm (2785 words)

	Dryas octopetala (Site not responding. Last check: 2007-10-07)
		Dryas octopetala (Mountain avens) is a small plant with a white flower.
		It grows in gravelly soils and heathlands such as those found near glaciers.
		It is a characteristic plant of cool moist climates.
	www.casdn.neu.edu /~geology/department/staff/colgan/iceland/skaftafell/45165_16.htm (34 words)

	NASA GISS: Science Briefs: Can Global Climate Change Abruptly? (Site not responding. Last check: 2007-10-07)
		Scientists from many countries are investigating such questions by studying the remains of plants in lakes and bogs.
		Seeds, needles, pollen and other plant parts are very well-preserved in lake muds because of the lack of oxygen in these sediments.
		The flip to cold conditions is clearly seen in records throughout Greenlands and in Europe, and it occurred suddenly, within a decade.
	www.giss.nasa.gov /research/intro/peteet_01 (292 words)

	plant description (Site not responding. Last check: 2007-10-07)
		HOME • return to plant lists: habitats • all plants • riparian • woodland • sun • subalpine • butterflies • birds
		The seed heads are attractive, airy, snowy white tufts, emerging in late summer (shown here, right).
		Dryas is beautiful in rock gardens even at low elevations.
	www.boskydellnatives.com /description_page\Dryas_octopetala.htm (64 words)

	Plant Profile for Dryas drummondii (Drummond's mountain-avens) (Site not responding. Last check: 2007-10-07)
		View 68 genera in Rosaceae, 3 species in Dryas or click below on a thumbnail map or name for variety profiles.
		This plant is listed by the U. federal government or a state.
		View 1 propagation protocol from Native Plants Network.
	plants.usda.gov /cgi_bin/plant_profile.cgi?symbol%3DDRDR (253 words)

	Younger Dryas Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-10-07)
		Looking For younger dryas - Find younger dryas and more at Lycos Search.
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		Look for younger dryas - Find younger dryas at one of the best sites the Internet has to offer!
	www.karr.net /encyclopedia/Younger_Dryas (937 words)

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