Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Jeffrey K. Gillan"'
Publikováno v:
Remote Sensing, Vol 16, Iss 10, p 1803 (2024)
Pre-fire environmental conditions play a critical role in wildfire severity. This study investigated the impact of pre-fire forest conditions on burn severity as a result of the 2020 Bighorn Fire in the Santa Catalina Mountains in Arizona. Using a st
Externí odkaz:
https://doaj.org/article/b3293b903371421098ac956a39f62c96
Autor:
Jeffrey K. Gillan, Guillermo E. Ponce‐Campos, Tyson L. Swetnam, Alessandra Gorlier, Philip Heilman, Mitchel P. McClaran
Publikováno v:
Ecosphere, Vol 12, Iss 7, Pp n/a-n/a (2021)
Abstract In adaptive management of rangelands, monitoring is the vital link that connects management actions with on‐the‐ground changes. Traditional field monitoring methods can provide detailed information for assessing the health of rangelands,
Externí odkaz:
https://doaj.org/article/1f820617448747ea82eef6c23622ecac
Autor:
Kyle Hartfield, Jeffrey K. Gillan, Cynthia L. Norton, Charles Conley, Willem J. D. van Leeuwen
Publikováno v:
Land, Vol 11, Iss 6, p 786 (2022)
Accurate identification of cacti, whether seen as an indicator of ecosystem health or an invasive menace, is important. Technological improvements in hyperspectral remote sensing systems with high spatial resolutions make it possible to now monitor c
Externí odkaz:
https://doaj.org/article/41c67088cbd4400b8408713cb640c926
Publikováno v:
Land, Vol 9, Iss 9, p 326 (2020)
Introduced as a soil erosion deterrent, salt cedar has become a menace along riverbeds in the desert southwest. Salt cedar replaces native species, permanently altering the structure, composition, function, and natural processes of the landscape. Rem
Externí odkaz:
https://doaj.org/article/a59ab1b101324fbc92eda9856654788a
Autor:
Tyson L. Swetnam, Jeffrey K. Gillan, Temuulen T. Sankey, Mitchel P. McClaran, Mary H. Nichols, Philip Heilman, Jason McVay
Publikováno v:
Frontiers in Plant Science, Vol 8 (2018)
Remotely sensing recent growth, herbivory, or disturbance of herbaceous and woody vegetation in dryland ecosystems requires high spatial resolution and multi-temporal depth. Three dimensional (3D) remote sensing technologies like lidar, and technique
Externí odkaz:
https://doaj.org/article/e09b42b2a971485da8f000b866c3fee3
Autor:
Tyson L. Swetnam, Alessandra Gorlier, Philip Heilman, Guillermo E. Ponce-Campos, Jeffrey K. Gillan, Mitchel P. McClaran
Publikováno v:
Ecosphere, Vol 12, Iss 7, Pp n/a-n/a (2021)
In adaptive management of rangelands, monitoring is the vital link that connects management actions with on-the-ground changes. Traditional field monitoring methods can provide detailed information for assessing the health of rangelands, but cost oft
Publikováno v:
Rangeland Ecology & Management. 72:575-585
Monitoring of forage utilization typically occurs at sample locations, or key areas, selected for their presumed potential to represent utilization across pastures. However, utilization can vary greatly across landscapes and may not be well represent
Publikováno v:
Environmental monitoring and assessment. 192(5)
The recent availability of small and low-cost sensor carrying unmanned aerial systems (UAS, commonly known as drones) coupled with advances in image processing software (i.e., structure from motion photogrammetry) has made drone-collected imagery a p
Publikováno v:
Rangeland Ecology & Management. 69:95-107
Nearly all of the ecosystem services supported by rangelands, including production of livestock forage, carbon sequestration, and provisioning of clean water, are negatively impacted by soil erosion. Accordingly, monitoring the severity, spatial exte
Publikováno v:
Ecological Indicators. 45:570-578
The use of very high resolution (VHR; ground sampling distances < ∼5 cm) aerial imagery to estimate site vegetation cover and to detect changes from management has been well documented. However, as the purpose of monitoring is to document change ov