Open Access. Powered by Scholars. Published by Universities.®
Physical and Environmental Geography Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Environmental Sciences (8)
- Physical Sciences and Mathematics (8)
- Environmental Education (7)
- Environmental Policy (7)
- Environmental Studies (7)
-
- Fire Science and Firefighting (7)
- Leisure Studies (7)
- Natural Resource Economics (7)
- Natural Resources Management and Policy (7)
- Nature and Society Relations (7)
- Other Environmental Sciences (7)
- Public Administration (7)
- Public Affairs, Public Policy and Public Administration (7)
- Recreation, Parks and Tourism Administration (7)
- Life Sciences (4)
- Plant Sciences (4)
- Geographic Information Sciences (2)
- Remote Sensing (2)
- Agronomy and Crop Sciences (1)
- Earth Sciences (1)
- Ecology and Evolutionary Biology (1)
- Hydrology (1)
- Oil, Gas, and Energy (1)
- Other Plant Sciences (1)
- Terrestrial and Aquatic Ecology (1)
- Keyword
-
- United States (6)
- Nebraska (5)
- Natural resources (3)
- Agate Fossil Beds National Monument (2)
- Missouri National Recreational River (2)
-
- Phenology (2)
- Plant communities (2)
- Scotts Bluff National Monument (2)
- ACVI (1)
- Bats (1)
- Biofuel crops (1)
- Biophyscial Characteristics (1)
- California (1)
- Cellulosic biofuel (1)
- First-generation biofuel (1)
- Iowa (1)
- Kansas (1)
- Kings Canyon National Park (1)
- Land-use change (1)
- MODIS (1)
- Missouri (1)
- NDVI (1)
- Phragmites australis (1)
- Plant Density (1)
- Remote Sensing (1)
- Seed Production (1)
- Sequoia National Park (1)
- South Dakota (1)
- Spectral Space (1)
- Vegetation Fraction (1)
Articles 1 - 10 of 10
Full-Text Articles in Physical and Environmental Geography
Plant Community Composition And Structure Monitoring In Scotts Bluff National Monument, 2013 Annual Report, Isabel Ashton, Michael Prowatzke
Plant Community Composition And Structure Monitoring In Scotts Bluff National Monument, 2013 Annual Report, Isabel Ashton, Michael Prowatzke
United States National Park Service: Publications
Introduction
During the last century, much of the prairie within the Northern Great Plains has been plowed for cropland, planted with non-natives to maximize livestock production, or otherwise developed, making it one of the most threatened ecosystems in the United States. Within Nebraska, greater than 77% of the area of native mixed grass prairie has been lost since European settlement (Samson and Knopf 1994). The National Park Service (NPS) plays an important role in preserving and restoring some of the last pieces of intact prairies within its boundaries. The stewardship goal of the NPS is to “preserve ecological integrity and …
Remote Sensing Of Green Leaf Area Index In Maize And Soybean: From Close-Range To Satellite, Anthony L. Nguy-Robertson
Remote Sensing Of Green Leaf Area Index In Maize And Soybean: From Close-Range To Satellite, Anthony L. Nguy-Robertson
School of Natural Resources: Dissertations, Theses, and Student Research
This dissertation seeks to explore alternative methodologies for estimating green leaf area index (LAI) and crop developmental stages. Specifically this research [1] developed an approach for creating a Moderate Resolution Imaging Spectroradiometer (MODIS) high spatial resolution product for estimating green LAI on the base of data collected using two different close-range sensors. It was determined that the vegetation indices (VIs) Wide Dynamic Range Vegetation Index (WDRVI) and Enhanced Vegetation Index 2 (EVI2) were capable of accurate estimation of green LAI from MODIS 250 m data using models developed from hyperspectral (RMSE < 0.69 m2 m-2; CV < 33%) or multispectral sensors (RMSE < 0.69 m2 m-2; …
Reviewing Models Of Land Availability And Dynamics For Biofuel Crops In The United States And The European Union, Ruopu Li, Nicola Di Virgilio, Qingfeng Guan, Song Feng, Goetz M. Richter
Reviewing Models Of Land Availability And Dynamics For Biofuel Crops In The United States And The European Union, Ruopu Li, Nicola Di Virgilio, Qingfeng Guan, Song Feng, Goetz M. Richter
School of Natural Resources: Faculty Publications
The biofuel-related land use in the USA and the EU has significantly expanded during the last decade; models have been used to estimate land availability and demand in these regions. This paper provides an overview of different land-use modeling practices applicable to first- and second-generation biofuels. We review the importance of different land categories for biofuels, modeling approaches (top-down/bottom-up) and their integration, data availability for calibration and validation, model scale, and uncertainty. Possible future changes of biofuel land use and research gaps and limitations are synthesized. Key issues are the lack of data for independent validation and the need for …
A Natural Resource Condition Assessment For Sequoia And Kings Canyon National Parks, Appendix 16 - Bats, Alice Chung-Maccoubrey
A Natural Resource Condition Assessment For Sequoia And Kings Canyon National Parks, Appendix 16 - Bats, Alice Chung-Maccoubrey
United States National Park Service: Publications
Scope of Analysis
North American bats are highly unique animals that have historically been overlooked by land managers and misunderstood by the public. Bats are unique as the only true flying mammals and due to their exceptionally long lives (5-15 years) and unusually low reproductive rates (typically one young per year) for their small size. Most North American bat species are insectivorous, serve as the primary predators of nocturnal insects, and can consume up to one-third of their weight in insects per night. Thus, bats play a role in regulating insect populations, insect-related ecological processes, and nutrient redistribution and cycling …
Missouri National Recreational River 2012 Resource Brief, Isabel W. Ashton, Michael Prowatzke, Kara Paintner
Missouri National Recreational River 2012 Resource Brief, Isabel W. Ashton, Michael Prowatzke, Kara Paintner
United States National Park Service: Publications
Includes brief information on plant community monitoring, water quality monitoring, and weather and climate monitoring for the Missouri National Recreational River in the United States for 2012.
Missouri National Recreational River Visitor Study, Summer 2012, Marc F. Manni, Yen Le, Steven J. Hollenhorst
Missouri National Recreational River Visitor Study, Summer 2012, Marc F. Manni, Yen Le, Steven J. Hollenhorst
United States National Park Service: Publications
Executive Summary
This visitor study report profiles a systematic random sample of Missouri National Recreation River visitors during July 19 - 25, 2012. A total of 467 questionnaires were distributed to visitor groups. Of those, 256 questionnaires were returned, resulting in a 54.8% response rate.
Group size and type: Thirty-eight percent of visitor groups consisted of two or three people and 35% were in groups of six or more. Sixty-four percent of visitor groups consisted of family groups.
State or country of residence: United States visitors were from 29 states and comprised 99% of total visitation during the survey period, …
Agate Fossil Beds National Monument 2012 Resource Brief, Marcia Wilson, Kara Paintner, Isabel Ashton, Michael Prowatzke
Agate Fossil Beds National Monument 2012 Resource Brief, Marcia Wilson, Kara Paintner, Isabel Ashton, Michael Prowatzke
United States National Park Service: Publications
Includes brief information on plant community monitoring, aquatic invertebrate monitoring, weather and climate monitoring at Agate Fossil Beds National Monument in Nebraska, USA from 2012.
Scotts Bluff National Monument 2012 Resource Brief, Isabel W. Ashton, Michael Prowatzke, Kara Paintner
Scotts Bluff National Monument 2012 Resource Brief, Isabel W. Ashton, Michael Prowatzke, Kara Paintner
United States National Park Service: Publications
Includes brief information on plant community monitoring, air quality monitoring, and weather and climate monitoring at Scotts Bluff National Monument in Nebraska, USA in 2012.
Proximal Sensing As A Means Of Characterizing Phragmites Australis, Travis Yeik
Proximal Sensing As A Means Of Characterizing Phragmites Australis, Travis Yeik
Department of Geography: Dissertations, Theses, and Student Research
Phragmites australis is an invasive wetland weed found throughout much of the United States. Documenting and mapping the growth and spread of this emergent macrophyte can be an important step in developing and implementing successful management strategies. Characterizing the phenology of a vegetation species with a sensor capable of hyperspectral resolution, positioned at close proximity to the canopy of interest, is often a first step necessary for understanding the basic species-specific reflectance patterns, and for quantifying the manner in which light interacts with the plants comprising particular communities. Spectral data over a P. australis canopy were collected during 22 field …
Plant Community Composition And Structure Monitoring For Agate Fossil Beds National Monument, 2012 Annual Report, Isabel W. Ashton, Stephen K. Wilson, Daniel J. Swanson, Michael Prowatzke, Phil Graeve
Plant Community Composition And Structure Monitoring For Agate Fossil Beds National Monument, 2012 Annual Report, Isabel W. Ashton, Stephen K. Wilson, Daniel J. Swanson, Michael Prowatzke, Phil Graeve
United States National Park Service: Publications
Executive Summary
Agate Fossil Beds National Monument (AGFO) plays a vital role in protecting and managing some of the last remnants of native mixed-grass prairie in the region. The Northern Great Plains Inventory & Monitoring Network (NGPN) and Fire Ecology Program (FireEP) surveyed 12 long-term monitoring plots in Agate Fossil Beds National Monument in 2012 as part of an effort to better understand the condition of plant communities in the park. We measured plant diversity and cover, looked for the presence of exotic species that may be newly invading the park, and evaluated the amount of human and natural disturbance …