Filters: Tags: repeat photography (X)
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Summary: Repeat photography of the 1871 Powell Colorado River Survey. 1968 Shoemaker Expedition recreating Powell's 1871 survey. For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. Note: Scanned from negative.
Summary: Repeat photography of the 1871 Powell Colorado River Survey. 1968 Shoemaker Expedition recreating Powell's 1871 survey. For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. Note: Scanned from negative.
Summary: Green River Formation. Green River quadrangle. Sweetwater County, Wyoming. July 5, 1968 For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. Note: Scanned from negative; also available in print. See also: shg_1-1, shg_1-2, shg_1-3, shg_1-4, shg_1-5, shg_1-6, and shg_1-8.
Summary: Repeat photography of the 1871 Powell Colorado River Survey. 1968 Shoemaker Expedition recreating Powell's 1871 survey. For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. Note: Scanned from negative.
Summary: Repeat photography of the 1871 Powell Colorado River Survey. 1968 Shoemaker Expedition recreating Powell's 1871 survey. For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. Note: Scanned from negative.
Summary: Repeat photography of the 1871 Powell Colorado River Survey. 1968 Shoemaker Expedition recreating Powell's 1871 survey. For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. Note: Scanned from negative.
Summary: Repeat photography of the 1871 Powell Colorado River Survey. 1968 Shoemaker Expedition recreating Powell's 1871 survey. For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. Note: Scanned from negative.
Summary: Horseshoe Canyon, on the west bank of the Green River. Flaming Gorge 7½ quadrangle, Wyoming. For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. See also: shg_6-7, shg_7-4, shg_7-6, shg_7-7, and shg_7-8.
Summary: Green River below Red Canyon Overlook. Flaming Gorge 7½ quadrangle, Utah. For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson.
Summary: Green River Formation. Green River quadrangle. Sweetwater County, Wyoming. July 5, 1968 For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. Note: Scanned from negative. See also: shg_1-1, shg_1-2, shg_1-4, shg_1-5, shg_1-6, shg_1-7, and shg_1-8.
Album caption: Disaster Falls, Canyon of Lodore. Dinosaur National Monument, Moffat County, Colorado. July 20, 1968. (Powell lost one boat here) (Photo by H.G. Stephens) Index card unavailable. Note: Image scanned from negative For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson.
Summary: USGS team seated at Buckboard Crossing quadrangle. Sweetwater County, Wyoming. July 10, 1968. For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. Note: Scanned from negative.
Summary: Repeat photography of the 1871 Powell Colorado River Survey. 1968 Shoemaker Expedition recreating Powell's 1871 survey. For additional information refer to, Stephens, H. G., Shoemaker, E. M., Shoemaker, E. M., & Shoemaker, E. M. (1987). In the footsteps of John Wesley Powell: An album of comparative photographs of the Green and Colorado Rivers, 1871-72 and 1968. Boulder, Colo: Johnson. Note: Scanned from negative.
Biological soil crust (BSC) communities (composed of lichens, bryophytes, and cyanobacteria) may be more dynamic on short-time scales than previously thought, requiring new and informative short-term monitoring techniques. We used repeat digital photography and image analysis, which revealed a change in area of a dominant BSC lichen, Collema tenax. The data generated correlated well with gross photosynthesis (r=0.57) and carotenoid content (r=0.53), two variables that would be expected to be positively related to lichen area. We also extracted fatty acids from lichen samples and identified useful phospholipid fatty acid (PLFA) indicators for the Collema mycobiont (20:1, 15:0, 23:0), and the Collema photobiont (18:3?3)....
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Journal of Arid Environments,
PLFA,
biomarkers,
cryptobiotic crusts,
cryptogams,
Repeat photography samples were used to analyze how the structure and site-specific distribution of forests may or may not have changed during the past century in the San Juan Mountains, Colorado. Systematic evaluation of 146 photosets was combined with field observations to identify trends in vegetation change. Both conifers and deciduous trees (e.g., aspen) have increased in extent. Forest recovery from large disturbances that occurred during Euro-American settlement contributed substantially to this increase. Trees also encroached into grass/shrublands, but less than half of photosets show tree invasion, and invasion is more common in small grass/shrubland openings interspersed with forest than in large openings....
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Forest Ecology and Management,
aspen,
landscape change,
mountain grasslands,
repeat photography,
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: The Nature Conservancy,
photo,
repeat photography
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