Bromus tectorum, known as downy brome, drooping brome or cheatgrass, is a winter annual grass native to Europe, southwestern Asia, and northern Africa, but has become invasive in many other areas. It now is present in most of Europe, southern Russia, Japan, South Africa, Australia, New Zealand, Iceland, Greenland, North America and western Central Asia. In the eastern US B. tectorum is common along roadsides and as a crop weed, but usually does not dominate an ecosystem. It has become a dominant species in the Intermountain West and parts of Canada, and displays especially invasive behavior in the sagebrush steppe ecosystems where it has been listed as noxious weed. B. tectorum often enters the site in an area that has been disturbed, and then quickly expands into the surrounding area through its rapid growth and prolific seed production.
A controlled or prescribed (Rx) burn is the practice of intentionally setting a fire to change the assemblage of vegetation and decaying material in a landscape. The purpose could be for forest management, ecological restoration, land clearing or wildfire fuel management. A controlled burn may also refer to the intentional burning of slash and fuels through burn piles. Controlled burns may also be referred to as hazard reduction burning, backfire, swailing or a burn-off. In industrialized countries, controlled burning regulations and permits are usually overseen by fire control authorities.
Rangelands are grasslands, shrublands, woodlands, wetlands, and deserts that are grazed by domestic livestock or wild animals. Types of rangelands include tallgrass and shortgrass prairies, desert grasslands and shrublands, woodlands, savannas, chaparrals, steppes, and tundras. Rangelands do not include forests lacking grazable understory vegetation, barren desert, farmland, or land covered by solid rock, concrete and/or glaciers.
Biological soil crusts are communities of living organisms on the soil surface in arid and semi-arid ecosystems. They are found throughout the world with varying species composition and cover depending on topography, soil characteristics, climate, plant community, microhabitats, and disturbance regimes. Biological soil crusts perform important ecological roles including carbon fixation, nitrogen fixation and soil stabilization; they alter soil albedo and water relations and affect germination and nutrient levels in vascular plants. They can be damaged by fire, recreational activity, grazing and other disturbances and can require long time periods to recover composition and function. Biological soil crusts are also known as biocrusts or as cryptogamic, microbiotic, microphytic, or cryptobiotic soils.
The Utah prairie dog is the smallest species of prairie dog endemic to the south-central steppes of the American state of Utah.
The J. N. "Ding" Darling National Wildlife Refuge is part of the United States National Wildlife Refuge System, located in southwestern Florida on Sanibel Island in the Gulf of Mexico. "Ding" Darling Wildlife Society (DDWS), a non-profit Friends of the Refuge organization, supports environmental education and services at the J.N. "Ding" Darling National Wildlife Refuge. It is named after the cartoonist Jay Norwood "Ding" Darling.
The Klamath Basin is the region in the U.S. states of Oregon and California drained by the Klamath River. It contains most of Klamath County and parts of Lake and Jackson counties in Oregon, and parts of Del Norte, Humboldt, Modoc, Siskiyou, and Trinity counties in California. The 15,751-square-mile (40,790 km2) drainage basin is 35% in Oregon and 65% in California. In Oregon, the watershed typically lies east of the Cascade Range, while California contains most of the river's segment that passes through the mountains. In the Oregon-far northern California segment of the river, the watershed is semi-desert at lower elevations and dry alpine in the upper elevations. In the western part of the basin, in California, however, the climate is more of temperate rainforest, and the Trinity River watershed consists of a more typical alpine climate.
The Churn Creek Protected Area is a 36,747-hectare (90,800-acre) provincial protected area in British Columbia, Canada. It is a mix of dryland canyon and steppe and adjoining rangeland flanking the canyon of Churn Creek and that stream's confluence with the Fraser River at the northern apex of the Camelsfoot Range. The historic Gang Ranch is just north of the Churn Creek Protected Area. The Empire Valley Ranch ecological preserve was added to the Protected Area in an expansion.
Anthropogenic biomes, also known as anthromes, human biomes or intensive land-use biome, describe the terrestrial biosphere (biomes) in its contemporary, human-altered form using global ecosystem units defined by global patterns of sustained direct human interaction with ecosystems. Anthromes are generally composed of heterogeneous mosaics of different land uses and land covers, including significant areas of fallow or regenerating habitats.
Harold A. "Hal" Mooney is an American ecologist and professor in the Department of Biology at Stanford University. He earned his Ph.D. at Duke University in 1960 and was employed by University of California-Los Angeles the same year. He joined the staff at Stanford University in 1968. He is an expert on plants and the functioning of ecosystems from the Tropics to the Arctic. He is a highly cited scientist.
Rangeland management is a natural science that centers around the study of rangelands and the "conservation and sustainable management [of Arid-Lands] for the benefit of current societies and future generations". Range management is defined by Holechek et al. as the "manipulation of rangeland components to obtain optimum combination of goods and services for society on a sustained basis". The United Nations (UN) has declared 2026 the International Year of Rangelands and Pastoralists, with the Food and Agriculture Organization leading the initiative.
Diana Harrison Wall was an American environmental scientist and soil ecologist. She was the founding director of the School of Global Environmental Sustainability, a distinguished biology professor, and senior research scientist at the Natural Resource Ecology Laboratory at Colorado State University. Wall investigated ecosystem processes, soil biodiversity and ecosystem services. Her research focused on the Antarctic McMurdo Dry Valleys and its Wall Valley was named after her. Wall was a globally recognized leader and speaker on life in Antarctica and climate change.
Woody plant encroachment is a natural phenomenon characterised by the increase in density of woody plants, bushes and shrubs, at the expense of the herbaceous layer, grasses and forbs. It predominantly occurs in grasslands, savannas and woodlands and can cause regime shifts from open grasslands and savannas to closed woodlands. The term bush encroachment refers to the expansion of native plants and not the spread of alien invasive species. It is thus defined by plant density, not species. Woody encroachment is often considered interpreted as a symptom of land degradation. The phenomenon is observed across different ecosystems and with different characteristics and intensities globally.
Osvaldo Sala is an ecologist and educator at Arizona State University, where he is the Julie A. Wrigley, Regents and Foundation Professor and the Founding Director of the Global Drylands Center, as well as founder of the Sala Lab. He is known for his research on how global change affects the functioning of global ecosystems and their biodiversity, with a focus on drylands.
Janice Carson Beatley was an American botanist, known for her fieldwork on the forests of Ohio and the flora of the Nevada Atomic Test Site. Beatley was Professor of Biological Sciences at the University of Cincinnati. She has three plant species named in her honour including Astragalus beatleyae.
Jiquan Chen is a landscape ecologist, primarily focused on nutrient flux, carbon cycling, bioenergy, and grassland ecology. He currently leads the LEES lab at Michigan State University.
Tadashi Fukami is an associate Professor of Biology and community ecologist at Stanford University. He is currently the head of Fukami Lab which is a community ecology research group that focuses on "historical contingency in the assembly of ecological communities." Fukami is an elected Fellow of the Ecological Society of America.
Roger Dale Rosentreter is a botanist, plant ecologist, naturalist, and conservationist. He was the president of the American Bryological and Lichenological Society from 2011 to 2013.
Mark Westoby is an Australian evolutionary ecologist, emeritus professor at Macquarie University, and a specialist in trait ecology.
