A5072393370- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Rangeland and Wildlife Management
- Plant Parasitism and Resistance
- Insect and Pesticide Research
- Biological Control of Invasive Species
- Botanical Research and Chemistry
- History and Developments in Astronomy
- Scottish History and National Identity
- American Constitutional Law and Politics
- Insect and Arachnid Ecology and Behavior
- Botany, Ecology, and Taxonomy Studies
- Neurobiology and Insect Physiology Research
- Australian History and Society
- Historical Economic and Social Studies
- Wildlife Ecology and Conservation
- Allelopathy and phytotoxic interactions
- American History and Culture
- Silymarin and Mushroom Poisoning
- Botany and Plant Ecology Studies
- Italian Fascism and Post-war Society
- Fire effects on ecosystems
- Weed Control and Herbicide Applications
- Tree-ring climate responses
- Plant Toxicity and Pharmacological Properties
Curtin University
2024
The University of Texas at Austin
1999-2023
Wichita State University
2010-2022
University of Nebraska–Lincoln
2003-2015
Institut Catholique d'Arts et Métiers
2004
Carleton College
1995
Significance Accurate prediction of community responses to global change drivers (GCDs) is critical given the effects biodiversity on ecosystem services. There consensus that human activities are driving species extinctions at scale, but debate remains over whether GCDs systematically altering local communities worldwide. Across 105 experiments included 400 experimental manipulations, we found evidence for a lagged response herbaceous plant caused by shifts in identities and relative...
Abstract: The problem of invasive species has reignited interest in biological control as a management tool. Classical involves deliberate release exotic natural enemies into new environments an attempt to limit the density species. Persistent, sustained limitation by coevolved is seductive concept. Evidence now suggests, however, that through can carry unanticipated ecological risks. There have been side effects distributing deliberately introduced weevil ( Rhinocyllus conicus ) and...
The Caribbean has displayed a capacity to fulfill climate change projections associated with tropical cyclone-related rainfall and flooding. This article describes the hydrometeorological characteristics of Hurricane Fiona in Puerto Rico September 2022 terms measured interpolated observed peak flows relative previous cyclones from 1899 2017. ranks third overall island-wide total fourth daily rainfall. Maximum during exceeded those previously reported (excluding María 2017) eastern interior...
In many semiarid regions woodlands, savannas and grasslands form an unstable landscape mosaic; the physiognomy of a particular patch in mosaic changes over time. To explain such temporal spatial variation tree abundance landscapes, greater understanding woodland population dynamics factors that affect trees woodlands is required. We examined apparent failure adult recruitment Quercus buckleyi (Spanish oak) populations on Edwards Plateau, Texas. verify failure, we quantified age structures...
Summary The flower of Brassica napus L. appears to be typically zoophilous (suited animal pollination) because its visually attractive petals, robust stigma and nectaries. Pollination by wind is feasible, however, likely effectiveness not immediately foreseeable the complexity interactions between objects windborne particles. Computational fluid dynamics (CFD) wind‐tunnel experiments were used investigate aerodynamic a suspension pollen. flower's petals handicapped pollination reducing...
Theory predicts that damage by a shared herbivore to secondary host plant species may either be higher or lower in the vicinity of preferred species. To evaluate importance ecological factors, such as proximity and density, determining direction strength herbivore-mediated indirect effects, we quantified oviposition exotic weevil Rhinocyllus conicus on native wavyleaf thistle Cirsium undulatum midgrass prairie loam soils upper Great Plains, USA. Over three years (2001–2003), number eggs laid...
Understanding spatial and temporal variation in factors influencing plant regeneration is critical to predicting population growth. We experimentally evaluated seed limitation, insect herbivory, their interaction the density of tall thistle ( Cirsium altissimum ) across a topographic ecosystem productivity gradient tallgrass prairie over two years. On ridges valleys, we used factorial experiment manipulating availability herbivory quantify effects of: input on seedling density, juvenile...
Abstract The formation of specific protein‐protein interactions is often a key to protein's function. During complex formation, each protein component will undergo change in the conformational state, for some these changes are relatively small and reside primarily at sidechain level; however, others may display notable backbone adjustments. One classic problems protein‐docking field be able priori predict extent such changes. In this work, we investigated three protocols find most suitable...
Insect-mediated indirect interactions between native plant species recently have been shown to be important determinants of performance in a number ecological communities. However, the potential effects exotic invasion on are not well understood. We examined whether presence or proximity targeted weed, musk thistle, influences magnitude attack thistles by introduced biological control, flowerhead weevil. At local scale, we quantified weevil egg densities heads wavyleaf thistle growing at...
Both competitors and natural enemies can limit plant population growth. However, demographic comparisons of the effects these interactions on introduced versus co‐occurring, related native species are uncommon. We asked: (1) does competition, insect herbivory, or their combination reduce growth rate, log λ, Eurasian thistle Cirsium vulgare sufficiently to explain its limited invasiveness in western tallgrass prairie; (2) how do compare those for C. altissimum , synchronously‐flowering...
Prediction of the role native insect herbivores in population growth and spatial distribution plants within environment remains limited. We developed an integral projection model (IPM) to explore effect on dynamics plant Cirsium altissimum (tall thistle), two different productivity zones tallgrass prairie Nebraska USA. Model parameters were extracted from field experiments: a seed addition experiment that demonstrated limitation by adult recruitment herbivory exclusion significant herbivore...
• Premise of the study: Interactions that limit lifetime seed production have potential to plant population sizes and drive adaptation through natural selection. Effects insect herbivory apical meristems (apical meristem mining) on rarely been quantified experimentally. We studied Cirsium altissimum (tall thistle), whose are mined by Platyptilia carduidactyla (artichoke plume moth), determine how damage affects maternal fitness evaluate both direct indirect mechanisms underlying these...
Abstract Aim Rates of tree population expansion have increased in many North American landscapes that were mosaics grasslands, savannas and woodlands historically. Consequences woodland include reduced economic return from grazing changes native biodiversity, but causes are poorly understood. We address historical timing blackjack oak ( Q uercus marilandica ) post stellata tree–grass ecosystems, roles climate land use driving this expansion, future stability these woodlands. Location The...
Abstract Aim Understanding spatial variation in the demographic and genetic structure of populations is central to explaining causes species range limits conservation. The Abundant Centre Hypothesis (ACH) predicts that as one moves away from centre a species’ biogeographical range, become less frequent more isolated, well exhibiting decreasing within‐population density. This increased isolation may lead reduced variability peripheral by limiting gene flow. In this study, we asked whether...