A5047982617- Rangeland and Wildlife Management
- Ecology and Vegetation Dynamics Studies
- Weed Control and Herbicide Applications
- Botany, Ecology, and Taxonomy Studies
- Turfgrass Adaptation and Management
- Seedling growth and survival studies
- Biological Control of Invasive Species
- Agronomic Practices and Intercropping Systems
- Plant Parasitism and Resistance
- Fire effects on ecosystems
- Allelopathy and phytotoxic interactions
- Plant and fungal interactions
- Species Distribution and Climate Change
- Plant and animal studies
- Botanical Research and Chemistry
- Seed Germination and Physiology
- Organic Food and Agriculture
- Ruminant Nutrition and Digestive Physiology
- Pasture and Agricultural Systems
- Diverse Educational Innovations Studies
- Botany and Plant Ecology Studies
- Agricultural Innovations and Practices
- Legume Nitrogen Fixing Symbiosis
- Soybean genetics and cultivation
- Biocrusts and Microbial Ecology
Montana State University
2015-2024
United States Department of Agriculture
2020-2024
Commonwealth Scientific and Industrial Research Organisation
2017
Eastern Oregon University
2006-2008
Agricultural Research Service
2008
Reef Ecologic
2007
University of Florida
1982
Ecologists are searching for models, frameworks, and principles that provide a bridge between theory the practice of restoration. Successional management has been proposed as useful model managing restoring invasive-plant-dominated rangeland because it provides framework in which ecological processes can be manipulated by managers to achieve desired plant community. identifies three general causes succession (site availability [disturbance], species [colonization], performance) suggests...
Crested wheatgrass ( Agropyron cristatum (L.) Gaertn.) is a nonindigenous grass introduced to North America for improving degraded rangelands. It often criticized forming nearly monotypic stands. Our objective was determine the feasibility of restoring native plant species crested wheatgrass‐dominated rangeland. We investigated methods suppressing followed by revegetation with mix species. tested five suppression treatments: undisturbed, low rate glyphosate (0.25× recommended rate), high...
Abstract Understanding the ecological processes that foster invasion and dominance by medusahead is central to its management. The objectives of this study were (1) quantify compare interference between squirreltail under different concentrations soil nitrogen (N) phosphorous (P) (2) growth rates field N P availabilities. We grew in an addition series a greenhouse applied one four nutrient treatments weekly: low (no or added), high (added 250 ml 600 µM solution form calcium phosphate), (3)...
Abstract Downy brome is a problematic invasive annual grass throughout western rangeland and has been increasing its abundance, spread, impacts across Montana during the past several years. In an effort to develop effective management recommendations for control of downy on rangeland, we compiled data from 24 trials state that investigated efficacy imazapic (Plateau ® , BASF Corporation, Research Triangle Park, NC) applied at various rates timings with methylated seed oil (MSO) or nonionic...
In recent decades, dozens of studies have involved attempts to introduce native and desirable nonnative plant species into grasslands dominated by invasive weeds. The newly introduced plants proved capable establishing, but because they are rarely monitored for more than four years, it is unknown if a high likelihood persisting suppressing invaders the long term. Beyond invaded grasslands, this lack long‐term monitoring general problem plaguing efforts reintroduce range taxa ecosystems. We...
Abstract Differing life histories contribute to difficulties establishing perennial grasses on lands dominated by exotic annual grasses. In a greenhouse study, we investigated what extent allowing the grass bluebunch wheatgrass emerge before downy brome would increase its competitive ability and whether modifying nitrogen (N) affect competition. We conducted an addition-series factorial experiment. three cohort treatments, two species were seeded concurrently or was at two- four-leaf stage...
Abstract Pollinators and pollination services are under threat globally, invasive plants have been implicated in their decline. Results of previous studies suggest that consequences invasion for pollinators plant–pollinator interactions context specific. Investigating factors such as the density an plant its phenology may provide a nuanced understanding species impacts. We conducted 2‐yr study Montana to investigate how local pollinator abundance, richness, community composition, visitation...
Abstract Although stand-alone and integrated management techniques have been cited as viable approaches to managing Canada thistle [ Cirsium arvense (L.) Scop.], it continues impact annual cropping perennial systems worldwide. We conducted meta-analyses assessing effectiveness of herbicide mechanism action groups for controlling C. using 55 studies in 45 systems. Herbicide was the most studied technique both types effective at reducing . However, multitactic techniques, with or without...
Revegetation of degraded shrub-steppe often fails due to intense competition from weeds, highly variable environmental conditions, and limited soil moisture. The objective this study was test whether a commercially available seed coating water-retaining acrylamide copolymer hydrogel would increase seedling emergence establishment crested wheatgrass (<i>Agropyron cristatum</i>) under three watering frequencies two textures. Pots were filled with one four treatments: field soil, parts mixed...
Summary Bromus tectorum is a winter annual grass that affects rangeland in western North America. A glasshouse pot experiment was conducted integrated imazapic application and inoculation of the soil‐borne fungal pathogen, P yrenophora semeniperda, for purpose providing greater control B . We hypothesised semeniperda would reduce emergence integration result reduction biomass density compared with either treatment applied alone. This study revealed significantly reduced responses were...
Abstract Nonnative plant invasions can have devastating effects on native communities; conversely, management efforts nontarget and deleterious impacts desirable plants. In the arid sagebrush steppe rangelands of western United States, nonnative winter annual species affect forage production biodiversity. One method proposed to control these is suppress soil seedbank using preemergent herbicide indaziflam. Our goal was evaluate efficacy indaziflam mustards ( Alyssum spp.) understand...
This experiment was designed to study the response of peanut ( Arachis hypogaea L.) canopy carbon dioxide exchange rate (CER) degrees foliage loss at different dates throughout season. Peanut plots were manually defoliated 25, 50, and 75 % on during season for comparison with control (0% defoliation). Weekly, CER measured which had been dates. Canopy initially reduced 45 70% after defoliation leaf area index (LAI) about 1.0, but subsequent measurements revealed considerable recovery....
Range- and wildlands are being invaded by nonindigenous plants, resulting in an unprecedented, rapid change plant community composition across the United States. Successional management predicts that species performance may be modified resource availability. The objective of this study was to determine whether could altered modifying soil nitrate (NO3–) ammonium (NH4 ) concentrations within Idaho fescue (Festuca idahoensis)/bluebunch wheatgrass (Pseudoroegneria spicata) association. We...
Abstract Field bindweed ( Convolvulus arvensis L.) is a persistent, perennial weed species that infests variety of temperate habitats around the globe. To evaluate efficacy general management approaches and impacts on crop yield to identify research gaps, we conducted series meta-analyses using published studies focusing C. in annual cropping systems. Our analysis 48 articles (560 data points) systems indicated 95% points measured over short time frames (within 2 yr treatment). Furthermore,...
Cheatgrass (Bromus tectorum L.) is one of the most problematic weeds in western United States rangelands and sagebrush steppe. It responds positively to different forms disturbance, its management has proven difficult. Herbicide or targeted grazing alone often fail provide adequate long-term control. Integrating both may afford better control by providing multiple stressors weed. We assessed herbicide application, sheep integrated on B. plant community rangeland southwestern Montana from...
L. Noelle Orloff (corresponding author) Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT 59715, noelleorloff{at}gmail.com.
Abstract Non‐native annual grasses have invaded western rangelands in the United States, and novel approaches are needed to supplement existing management strategies. The aim of this study was investigate biofumigation, use Brassicaceae products suppress weeds, as a control for two non‐native (cheatgrass, Bromus tectorum ventenata, Ventenata dubia ) its effects on dominant native perennial (bluebunch wheatgrass, Pseudoroegneria spicata Idaho fescue, Festuca idahoensis ). We tested effect...