A5025847398- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Rangeland and Wildlife Management
- Botany, Ecology, and Taxonomy Studies
- Species Distribution and Climate Change
- Fire effects on ecosystems
- Plant Parasitism and Resistance
- Turfgrass Adaptation and Management
- Plant Ecology and Taxonomy Studies
- Botany and Plant Ecology Studies
- Insect and Pesticide Research
- Genetic diversity and population structure
- Agronomic Practices and Intercropping Systems
- Plant Taxonomy and Phylogenetics
- Plant and fungal interactions
- Lichen and fungal ecology
- Seedling growth and survival studies
- Fern and Epiphyte Biology
- Plant Pathogens and Resistance
- Structural Behavior of Reinforced Concrete
- Environmental DNA in Biodiversity Studies
- Legume Nitrogen Fixing Symbiosis
- Education Systems and Policy
- Plant Diversity and Evolution
- Global Educational Policies and Reforms
Oregon State University
2001-2023
Institute for Culture and Ecology
2005-2019
Oeko Institut
2015
Bangor University
1998
The science of reintroduction for conservation purposes is young, and there still much to learn about the practice. As a means achieving biological goals successfully establishing new populations enhance species survival prospects, project goals, such as learning how go populations, projects are best done well designed scientific experiments that test explicit hypotheses. Focusing on range factors common any reintroduction, we review several empirical with respect hypotheses tested,...
Abstract Uncertainty associated with ecological forecasts has long been recognized, but forecast accuracy is rarely quantified. We evaluated how well data on 82 populations of 20 species plants spanning 3 continents explained and predicted plant population dynamics. parameterized stage‐based matrix models demographic from individually marked determined these sizes observed at least 5 years into the future. Simple forecasted dynamics poorly; only 40% fell within our forecasts’ 95% confidence...
The fundamental goal of a rare plant translocation is to create self-sustaining populations with the evolutionary resilience persist in long term. Yet, most syntheses focus on few factors influencing short-term benchmarks success (e.g., survival and reproduction). Short-term can be misleading when trying infer future growth viability because that promote establishment may differ from those required for long-term persistence. We assembled large (n = 275) broadly representative data set...
Abstract Rising levels of atmospheric CO 2 are expected to perturb forest ecosystems, although the extent which specific ecological interactions will be modified is unclear. This research evaluates effects elevated and temperature, alone in combination, on leaf nutritional quality Pendunculate oak ( Quercus robur L. ), implications for herbiverous insect defoliators discussed. A 3 °C temperature rise reduced quality, by reducing foliar nitrogen concentration increasing condensed tannin...
We examined the effects of fire on population growth rate and extinction probability a rare prairie plant. Lomatium bradshawii (Apiaceae) is an endangered species western Oregon Washington prairies that were frequently burned by Native Americans prior to late 1800s. Using data from mapped plants in two populations subjected different fall burning frequencies over six-year period, we constructed stochastic transition matrix models evaluate viability populations. Stochasticity was incorporated...
Prairie restoration is often limited by the availability of appropriate local plant materials. Use locally adapted seed a goal in restoration, yet little information to inform transfer guidelines available for native species. We established common gardens five plants ( Eriophyllum lanatum var. leucophyllum, Epilobium densiflorum, Potentilla gracilis gracilis, Lupinus polyphyllus , and Saxifraga oregana ) frequently used prairie Pacific Northwest North America determine if populations...
We conducted a 5-year study at 10 sites from British Columbia to the Willamette Valley aimed improving methods for restoring degraded prairies and oak savannas. Our manager-recommended treatment combinations were applied over 4 years included following components: spring fall mowing, grass-specific broad-spectrum herbicide, burning. All crossed with native seed addition. As expected, we found there was no 'silver bullet'; while some led large improvements in weed control diversity abundance,...
The genetic diversity of germplasm used in reintroduction and restoration efforts can influence how resulting populations establish, reproduce, evolve over time, particularly disturbed changing conditions. Regional admixture provenancing, mixing seeds derived from multiple within the same region as target site, has been suggested to produce genetically diverse germplasm. Yet little empirical evidence shows this approach compares source populations, or it varies restored populations. Here, we...
Abstract Conservation translocations are an established method for reducing the extinction risk of plant species through intentional movement within or outside indigenous range. Unsuitable environmental conditions at translocation recipient sites and a lack understanding species–environment relationships often identified as critical barriers to success. However, previous syntheses have drawn these inferences from analyses qualitative feedback rather than quantitative data. In this study, we...
Astragalus australis var. olympicus is an endemic plant of the Olympic Mountains, Washington. It considered a Species Concern by U.S. Fish and Wildlife Service. This study focused on reproductive biology from flower production through seed germination to identify possible weak points that might contribute its rarity impede conservation. Most plants produced large mean number flowers ovules (314.8 4106, respectively), but relatively few these formed fruits seeds (25.8 3.8%, respectively). In...
A suite of ecological and genetic factors are likely to contribute reintroduction performance. Potential include the similarity between seed source introduction site, population size diversity sources, habitat quality site. We conducted common garden experiments with golden paintbrush ( Castilleja levisecta ), an endangered species from Pacific Northwest, U.S.A., in order test hypotheses about performance provide management recommendations. Ten gardens, each composed C. individuals grown six...
Abstract Question Most results of restoration efforts are species‐specific and/or site‐specific and therefore not general enough to be easily applied other species sites. Our research addresses the issue by investigating feasibility using plant traits instead taxonomic identity characterize responses treatments. Location Ten bunchgrass prairie sites in P acific N orthwest orth A merica ( O regon zashington, USA ; B ritish C olumbia, anada). Methods We developed two types quantitative models...
Population viability analysis is an important tool for conservation biologists, and matrix models that incorporate stochasticity are commonly used this purpose. However, stochastic simulations may require assumptions about the distribution of parameters, modelers often select a statistical seems reasonable without sufficient data to test its fit. We from long-term (5–10 year) studies with 27 populations five perennial plant species compare seven methods incorporating environmental...
Invasion by non-native plant species is one of the greatest threats to prairie, savanna, and oak woodland habitats Willamette Valley-Puget Trough-Georgia Basin (WPG) ecoregion. Invasive plants can modify diversity, structure, function natural habitats. Effects from invasions have contributed decline many native found on Pacific Northwest prairie Even with aggressive management, these unique are severely impacted nonnative invasions. Without diversity will continue rapidly. Here we provide a...
Recent global declines of pollinator populations have highlighted the importance pollinators, which are undervalued despite essential contributions to ecosystem services. To identify critical knowledge gaps about we describe state responses pollinators and their foraging nesting resources historical natural disturbances new stressors in Great Plains grasslands riparian ecosystems. In addition, also provide information management research needs guide efforts sustain by extension, flowering...
Abstract Reintroduction of endangered plants faces many challenges, but the survival some species may depend on its success. What measures should practitioners take to ensure a successful project, and how success be measured? Steps in reintroduction process include planning identification objectives, finding source material, propagation, site selection, preparation, outplanting, monitoring, evaluation interpretation, feedback improve protocols, communication with others, habitat maintenance,...
Amanda G. Stanley, Thomas N. Kaye and Peter W. Dunwiddie
The pace of habitat destruction and loss biological diversity globally exceeds the current capacity societies to restore functioning ecosystems. Working with prison systems engage inmates in conservation ecological science is an innovative approach increase our ability reestablish at-risk species, while simultaneously providing people custody opportunities for reciprocal restoration, education, therapeutic activities, safer conditions, lower costs imprisonment. We present benefits working...
Species interactions affect plant diversity through the net effects of competition and facilitation, with latter more prevalent in physically stressful environments when cover ameliorates abiotic stress. One explanation for species loss invader-dominated systems is a shift competition-facilitation balance, intensifying areas formerly structured by facilitation. We test this possibility 10-site prairie meta-experiment along 500-km latitudinal stress gradient, quantifying relationships among...