Changes in landscape patterns associated with the persistence of aspen (Populus tremuloides Michx.) on the western slope of the Rocky Mountains, Colorado

Manier, Daniel J.; Laven, Richard D.

doi:10.1016/s0378-1127(01)00702-2

Cited by 57 publications

(63 citation statements)

References 20 publications

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“…As the repeat photographs had a larger angle of view, they were cropped to be precise repeat photographs. This created a uniform sampling area, which is a requisite for quantitative photo-analysis (Manier and Laven, 2002 series) providing 0.30 m to 1 m planimetric accuracy and 1 to 3 m altimetric accuracy after postprocessing. GPS measurements were required for two purposes: (i) for the creation of orthophotographs and, (ii) to warp LUC units that were demarcated on the photographs to the horizontal plane of the map.…”

Section: Repeat Photographymentioning

confidence: 99%

Land use and cover dynamics in Africa since the nineteenth century: warped terrestrial photographs of North Ethiopia

et al. 2012

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Quantitative research on land use and land cover (LUC) in Africa usually addresses the second half of the twentieth century, by using remote sensing data. Terrestrial photographs, which are available since 1868 in Ethiopia, are seldom used in a quantitative way. This paper presents a methodology that allows to produce land use and land cover (LUC) maps on the basis of old terrestrial photographs. Therefore, land use and land cover was investigated on historical and present-day photographs, and these interpretations were warped to the horizontal plane of the map. The resulting maps allow to gain better insights into LUC changes over a period of 140 years. The results show that woody vegetation increased strongly, together with an increase in built-up area. This occurred especially at the expense of bushland. The study validates pervious findings and shows that improved land management strategies in one of the world's most degraded areas can lead to environmental rehabilitation

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Section: Repeat Photographymentioning

confidence: 99%

Land use and cover dynamics in Africa since the nineteenth century: warped terrestrial photographs of North Ethiopia

et al. 2012

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“…Much of the current concern, however, is based on local-scale studies [5]. Recent landscape-scale studies suggest persistent or even increasing aspen stands at some locations [4,[6][7][8]. Similarly, a regional-scale study in the Greater Yellowstone…”

Section: Introductionmentioning

confidence: 99%

Regional Assessment of Aspen Change and Spatial Variability on Decadal Time Scales

Sankey

2009

Remote Sensing

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Quaking aspen (Populus tremuloides) is commonly believed to be declining throughout western North America. Using a historical vegetation map and Landsat TM5 imagery, this study detects changes in regional aspen cover over two different time periods of 85 and 18 years and examines aspen change patterns with biophysical variables in the Targhee National Forest of eastern Idaho, USA. A subpixel classification approach was successfully used to classify aspen. The results indicate greater spatial variability in regional aspen change patterns than indicated by local-scale studies. The observed spatial variability appears to be an inherent pattern in regional aspen dynamics, which interacts with biophysical variables, but persists over time.

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“…Explanatory factors contributing to aspen change are fire suppression, climate change, impacts of European settlement, and effects of browsing by wildlife and livestock (Shepperd et al, 2006). Numerous studies have addressed the status of aspen forests in the region, with some showing declining coverage (Bartos and Campbell, 1998;Rogers, 2002;Gallant et al, 2003;Brown et al, 2006) and others describing aspen expansion (Manier and Laven, 2002;Kulakowski et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Lichen community change in response to succession in aspen forests of the southern Rocky Mountains

Rogers

Ryel

2008

Forest Ecology and Management

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Changes in landscape patterns associated with the persistence of aspen (Populus tremuloides Michx.) on the western slope of the Rocky Mountains, Colorado

Cited by 57 publications

References 20 publications

Land use and cover dynamics in Africa since the nineteenth century: warped terrestrial photographs of North Ethiopia

Land use and cover dynamics in Africa since the nineteenth century: warped terrestrial photographs of North Ethiopia

Regional Assessment of Aspen Change and Spatial Variability on Decadal Time Scales

Lichen community change in response to succession in aspen forests of the southern Rocky Mountains

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