Photo point monitoring handbook—Part A: Field procedures; Part B: Concepts and analysis.

Hall, Frederick C.

doi:10.2737/pnw-gtr-526

Cited by 18 publications

(18 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Typical goals of these types of projects, in addition to those noted earlier, are to observe, inter alia, the effects of logging, changes in wildlife habitats, the consequences of grazing, and the role of fire in ecosystems (Butler, 1994;O'Connor and Bond, 2007). Hall (2001) suggests that information derived from this photographic monitoring process is particularly useful for foresters, ranchers, wildlife biologists, and land managers. Works focusing on the Canadian Rockies (White and Hart, 2008) and the Grand Canyon (Webb, 1996) are popular among landscape enthusiasts.…”

Section: Repeat Photography For Understanding Landscape Changementioning

confidence: 99%

Evaluating post‐Katrina recovery in Mississippi using repeat photography

2011

View full text Add to dashboard Cite

Hurricane Katrina of August 2005 had extensive consequences for the state of Mississippi in the United States. Widespread infrastructure and property damage, massive social dislocation, and ecological loss remain among the many challenges faced by communities as they work towards 'normalcy'. This study employs repeat photography to understand differential recovery from Hurricane Katrina in Mississippi. Revealing change with conventional landscape photography, a process known as repeat photography, is common in the natural sciences. Simply stated, repeat photography is the practice of re-photographing the same scene as it appears in an earlier photograph. Photographs were taken at 131 sites every six months over a three-year period. Each photograph was assigned a recovery score and a spatially interpolated recovery surface was generated for each time period. The mapped and graphed results show disparities in the progression of recovery: some communities quickly entered the rebuilding process whereas others have lagged far behind.

show abstract

Section: Repeat Photography For Understanding Landscape Changementioning

confidence: 99%

Evaluating post‐Katrina recovery in Mississippi using repeat photography

2011

View full text Add to dashboard Cite

show abstract

“…Quantitative studies have included use of indices of visual obstruction to gage willow clump densities (Boyd and Svejcar 2005), detection of species change using geographic information systems (GIS) with pixel color and object recognition (Michel et al 2010), and measurement of vegetation heights in historical photos based on known heights in retake photos (Ripple and Beschta 2006). Matching camera type and focal lengths with repeat photography is not critically important, as long as the retake photo was captured at the same location as the historical photo (Hall 2002). This allows for the opportunity for historical photos to be used for analysis via repeat photography even when the photos were not initially intended for this purpose.…”

Section: Introductionmentioning

confidence: 98%

Restoration of Riparian Areas Following the Removal of Cattle in the Northwestern Great Basin

Batchelor

Ripple

Wilson

et al. 2015

Environmental Management

View full text Add to dashboard Cite

We assessed the effects of the elimination of livestock in riparian systems at Hart Mountain National Antelope Refuge in southeastern Oregon, 23 years after the removal of cattle grazing, using 64 photos taken before grazing was removed compared with later retake photos. Two methods were used for this assessment: (1) a qualitative visual method comparing seven cover types and processes and (2) a new quantitative method of inserting digital line transects into photos. Results indicated that channel widths and eroding banks decreased in 64 and 73% of sites, respectively. We found a 90% decrease in the amount of bare soil (P < 0.001) and a 63% decrease in exposed channel (P< 0.001) as well as a significant increase in the cover of grasses/sedges/forbs (15% increase, P = 0.037), rushes (389% increase, P = 0.014), and willow (388% increase, P < 0.001). We also assessed the accuracy of the new method of inserting digital line transects into photo pairs. An overall accuracy of 91% (kappa 83%) suggests that digital line transects can be a useful tool for quantifying vegetation cover from photos. Our results indicate that the removal of cattle can result in dramatic changes in riparian vegetation, even in semi-arid landscapes and without replanting or other active restoration efforts.

show abstract

“…New wood entering the study reach during the monitoring period can be readily identifi ed and tagged. Repeat photography of a reach can also be used to document movement and recruitment of new large wood (Hall, 2001a(Hall, , 2001b.…”

Section: Additional Informationmentioning

confidence: 99%

Large in‐stream wood studies: a call for common metrics

Wohl

Cenderelli

Dwire

et al. 2010

Earth Surf Processes Landf

126

102

View full text Add to dashboard Cite

During the past decade, research on large in-stream wood has expanded beyond North America's Pacifi c Northwest to diverse environments and has shifted toward increasingly holistic perspectives that incorporate processes of wood recruitment, retention, and loss at scales from channel segments to entire watersheds. Syntheses of this rapidly expanding literature can be facilitated by agreement on primary variables and methods of measurement. In this paper we address these issues by listing the variables that we consider fundamental to studies of in-stream wood, discussing the sources of variability in their measurement, and suggesting more consistency in future studies. We recommend 23 variables for all studies of in-stream wood, as well as another 12 variables that we suggest for studies with more specifi c objectives. Each of these variables relates either to the size and characteristics of in-stream wood, to the geomorphic features of the channel and valley, or to the ecological characteristics of the riparian zone adjacent to the study reach. The variables were derived from an overview of those cited in the literature and from our collective fi eld experiences.

show abstract

Photo point monitoring handbook—Part A: Field procedures; Part B: Concepts and analysis.

Abstract: Hall, Frederick C. 2001. Photo point monitoring handbook: part A-field procedures. Gen. Tech. Rep.

Cited by 18 publications

References 0 publications

Evaluating post‐Katrina recovery in Mississippi using repeat photography

Evaluating post‐Katrina recovery in Mississippi using repeat photography

Restoration of Riparian Areas Following the Removal of Cattle in the Northwestern Great Basin

Large in‐stream wood studies: a call for common metrics

Contact Info

Product

Resources

About