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Cryptobiotic Soil Crust in the Desert
 
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Cryptobiotic (biological) soil crust is a living groundcover that forms the foundation of desert plant life. This knobby, black crust is dominated by cyanobacteria, but also includes lichens, mosses, green algae, microfungi and bacteria. When wet, Cyanobacteria move through the soil and bind rock or soil particles, forming an intricate web of fibers. In this way, loose soil particles are joined together, and an otherwise unstable surface becomes very resistant to both wind and water erosion. The soil-binding action is not dependent on the presence of living filaments. Layers of abandoned sheaths, built up over long periods of time, can still be found clinging tenaciously to soil particles, providing cohesion and stability in sandy soils at depths up to 10cm. Nitrogen fixation is another significant capability of cyanobacteria. Vascular plants are unable to utilize nitrogen as it occurs in the atmosphere. Cyanobacteria are able to convert atmospheric nitrogen to a form plants can use. This is especially important in desert ecosystems, where nitrogen levels are low and often limiting to plant productivity. Soil crusts have other functions as well, including an ability to intercept and store water, nutrients and organic matter that might otherwise be unavailable to plants. http://www.nps.gov/cany/learn/nature/soils.htm http://en.wikipedia.org/wiki/Biological_soil_crust http://www.gorp.com/parks-guide/travel-ta-arches-national-park-ecotourism-moab-sidwcmdev_067612.html
Views: 637 Natalia Goncharova
It's Alive! Biological Soil Crusts in the Sonoran and Chihuahuan Deserts
 
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Don't bust the crust! Before you go traipsing across the desert, find out about this living groundcover--what it's made of, why it's important, and how to protect it--in this short film from the National Park Service Sonoran Desert Network.
Views: 1802 sonorandesertnetwork
The Role of Biological Soil Crusts
 
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Part of a Climate Science online course offered through a USU Extension and eXtension partnership https://extension.learn.usu.edu/browse/climate-essentials/courses/climate
Don't Bust The Crust
 
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The Subaru/ Leave No Trace Traveling Trainers bring you knowledge on Cryptobiotic Soil! Leave No Trace is a national organization that protects the outdoors by teaching people to enjoy it responsibly. Enjoy Your World. Leave No Trace. Thanks to Leave No Trace Partners: Subaru of America Hi-Cone REI SmartWool Deuter Yakima
Views: 1033 LeaveNoTraceCenter
Biocrust - Cryptogamic soil crust on the Colorado National Monument
 
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Crytogramic soil (also known as soil crust or biocrust) is usually found in arid environments and can be made up of cyanobacteria, mosses and lichen. It's very fragile so I always avoid walking on it or making any kind of disturbance. I recorded this video on top of the plateau on the Liberty Cap trail in the Colorado National Monument - just a few kilometres from the Utah border and the city of Grand Junction, Colorado. Here's my personal web page about Biology: http;//www.rogerwendell.com/biology.html Here's my page about hiking: http://www.rogerwendell.com/hiking.html 11-11-2009
Views: 761 zeekzilch
Cryptobiotic soil (Biological Soil Crust) and an insect on my lense...
 
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This recording was made along the Confluence Overlook Trail in the Needles District of Canyonlands National Park in Utah. Biological soil crusts (also known as cryptogamic, microbiotic, microphytic, or cryptobiotic soils ) are communities of living organisms on the soil surface in arid- and semi-arid ecosystems. Cryptobiotic soils are found throughout the world with varying species composition and cover depending on topography, soil characteristics, climate, plant community, microhabitats, and disturbance regimes. Cryptobiotic soils crusts perform carbon fixation, nitrogen fixation, soil stabilization, alter soil albedo and water relations, and affect germination and nutrient levels in vascular plants. These soils are EASILY damaged by fire, recreational activity, grazing, and other disturbance and can require long time periods to recover composition and function so please avoid disturbing them! This recording was made in the Needles District of Canyonlands National Park in Utah. I believe this particular segment was somewhere along the Big Spring to Squaw Canyon loop trails. Anyway, Canyonlands National Park is located in southeastern Utah near the town of Moab. It's a colorful, fantastical landscape that's been eroded by the Colorado and Green Rivers into countless canyons, mesas, and buttes. Legislation creating the park was signed into law by President Lyndon Johnson on September 12, 1964. The park is divided into four districts: the Island in the Sky, the Needles, the Maze, and the rivers themselves. While these areas share a primitive desert atmosphere, each retains its own character. Author Edward Abbey ("Cactus Ed," whom I met privately with a few years before his passing...) was a frequent visitor who described Canyonlands as "...the most weird, wonderful, magical place on earth—there is nothing else like it anywhere." Here's my personal webpage about biology: http://www.rogerwendell.com/biology.html Here's my page about plants: http://www.rogerwendell.com/plants.html Here's my page about biodiversity: http://www.rogerwendell.com/biodiversity.html Here's my personal webpage about Edward Abbey (and Thoreau): http://www.rogerwendell.com/abbey.html 05-11-2015
Views: 199 zeekzilch
Cyanobacteria filaments moving after rehydration
 
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These cyanobacterial filaments were found in a soil crust and rehydrated. They are sliding back and forth inside of a mucilaginous sheath. Most likely they are a member of the genus Microcoleus.
Views: 71 Algae Analytics
Cryptogamic soil at the Colorado National Monument
 
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Crytogramic soil (also known as soil crust or biocrust) is usually found in arid environments and can be made up of cyanobacteria, mosses and lichen. It's very fragile so I always avoid walking on it or making any kind of disturbance. I recorded this video on top of the plateau on the Liberty Cap trail in the Colorado National Monument - just a few kilometres from the Utah border and the city of Grand Junction, Colorado. Here's my personal web page about Biology: http;//www.rogerwendell.com/biology.html Here's my page about hiking: http://www.rogerwendell.com/hiking.html 11-11-2009
Views: 272 zeekzilch
Biological Soil Crust
 
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Biological Soil Crust is a living groundcover that forms the foundation of plant life in Canyonlands and the surrounding area. Join ranger Karen Henker and learn about this critical - and fragile - component of the high desert ecosystem. View and audio described version of this video: https://youtu.be/bsQUwcpNFl4
Views: 1832 CanyonlandsNPS
Mr  Naturalist visits with Biological Soil Crust
 
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A comedic video detailing biological soil crust and its importance in desert ecosystems.
Restoration of biological soil crusts in the Great Basin
 
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Jayne Belnap, Research Ecologist with the U.S. Geological Survey in Moab, UT, discusses principals, techniques, and answers questions about restoring biological soil crusts in the Great Basin.
Views: 497 GBFireScience
cryptobiotic soils
 
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Doug Owen, National Park Service Geologist at Craters of the Moon National Monument shows how rapidly some mosses can go from dormant to photosynthesizing. This was part of the ReaL Earth Inquiry Teacher Professional Development Program at Craters of the Moon in Summer 2012.
Views: 704 Don Haas