A5088929369- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Species Distribution and Climate Change
- Rangeland and Wildlife Management
- Soil Carbon and Nitrogen Dynamics
- Peatlands and Wetlands Ecology
- Land Use and Ecosystem Services
- Climate change and permafrost
- Mycorrhizal Fungi and Plant Interactions
- Ecosystem dynamics and resilience
- Cryospheric studies and observations
- Animal Ecology and Behavior Studies
- Plant Parasitism and Resistance
- Plant Water Relations and Carbon Dynamics
- Fire effects on ecosystems
- Botany, Ecology, and Taxonomy Studies
- Microbial Community Ecology and Physiology
- Geology and Paleoclimatology Research
- Wildlife Ecology and Conservation
- Biological Control of Invasive Species
- Tree-ring climate responses
- Botany and Plant Ecology Studies
- Isotope Analysis in Ecology
- Conservation, Biodiversity, and Resource Management
- Polar Research and Ecology
University of Colorado Boulder
2016-2025
Institute of Arctic and Alpine Research
2016-2025
University of Colorado System
2007-2023
Ecological Society of America
2020
John Wiley & Sons (United States)
2020
University of California, Berkeley
2010-2017
University of California, Irvine
2003-2014
University of California System
2005-2007
La Trobe University
2006
Pacific Northwest Research Station
2006
Summary Plant–soil feedbacks is becoming an important concept for explaining vegetation dynamics, the invasiveness of introduced exotic species in new habitats and how terrestrial ecosystems respond to global land use climate change. Using a conceptual model, we show critical alterations plant–soil feedback interactions can change assemblage plant communities. We highlight recent advances, define terms identify future challenges this area research discuss variations strengths directions...
Recent observations of changes in some tundra ecosystems appear to be responses a warming climate. Several experimental studies have shown that plants and can respond strongly environmental change, including warming; however, most were limited single location short duration based on variety designs. In addition, comparisons among are difficult because techniques been used achieve different measurements assess responses. We metaanalysis plant community from standardized experiments at 11...
Abstract Predicting ecosystem responses to global change is a major challenge in ecology. A critical step that understand how changing environmental conditions influence processes across levels of ecological organization. While direct scaling from individual dynamics can lead robust and mechanistic predictions, new approaches are needed appropriately translate questions through the community level. Species invasion, loss, turnover all necessitate this processes, but predicting such changes...
Human activities have increased N availability dramatically in terrestrial and aquatic ecosystems. Extensive research demonstrates that local plant species diversity generally declines response to nutrient enrichment, yet the mechanisms for this decline remain unclear. Based on an analysis of >900 responses from 34 N-fertilization experiments across nine ecosystems North America, we show both trait-neutral trait-based operate simultaneously influence loss as production increases. Rare...
As an inevitable consequence of increased environmental degradation and anticipated future change, societal demand for ecosystem restoration is rapidly increasing. Here, I evaluate successes failures in restoration, how science informing these efforts, ways to better address decision-making policy needs. Despite the multitude projects wide agreement that evaluation a key progress, comprehensive evaluations are rare. Based on limited available information, outcomes vary widely. Cases complete...
Summary 1. Many studies of community assembly focus on two mechanisms: environmental filtering and competitive interactions. This ignores the importance other processes such as equalizing fitness facilitation. The contribution different to can be elucidated by examining functional diversity patterns traits that differ in their processes. 2. In alpine tundra, we explored trait along a stress–resource gradient varied productivity, nitrogen availability soil moisture. We explore whether is low...
Efforts around the globe need legal and policy clarification
Abstract The world's ecosystems are experiencing simultaneous changes in the supply of multiple limiting resources. Two these, water and nitrogen (N) can strongly limit grassland production affect community composition biogeochemical cycles different ways. Grassland California may be particularly vulnerable to current predicted precipitation N deposition, ecosystem responses potential interactive effects not well understood. Here, we show strong colimitation plant resulting from factorial...
Significance Human activities have elevated nitrogen (N) deposition and there is evidence that impacts species diversity, but spatially extensive context-specific estimates of N loads at which losses begin remain elusive. Across a wide range climates, soil conditions, vegetation types in the United States, we found 24% >15,000 sites were susceptible to deposition-induced loss. Grasslands, shrublands, woodlands lower than forests, susceptibility increased acidic soils. These findings are...
Global energy use and food production have increased nitrogen inputs to ecosystems worldwide, impacting plant community diversity, composition, function. Previous studies show considerable variation across terrestrial herbaceous in the magnitude of species loss following (N) enrichment. What controls this remains unknown. We present results from 23 N-addition experiments North America, representing a range climatic, soil properties, determine conditions that lead greater diversity decline....
Niche complementarity, in which coexisting species use different forms of a resource, has been widely invoked to explain some the most debated patterns ecology, including maintenance diversity and relationships between ecosystem function. However, classical models assume resource specialization form distinct niches, does not obviously apply broadly overlapping plant communities. Here we utilize an experimental framework based on competition theory test whether plants partition resources via...
Climate gradients shape spatial variation in the richness and composition of plant communities. Given future predicted changes climate means variability, likely regional magnitudes these changes, it is important to determine how temporal influences community structure. Here, we evaluated species richness, turnover, grassland communities responded interannual precipitation by synthesizing long-term data from grasslands across United States. We found that mean annual precipitation,(MAP) was a...
Summary Plant species can influence soil biota, which in turn the relative performance of plant species. These plant–soil feedbacks ( PSF s) have been hypothesized to affect many community‐level dynamics including coexistence, dominance and invasion. The importance s exotic invasion, although widely hypothesized, has difficult determine because invader establishment necessarily precedes invader‐mediated s. Here, we combine a spatial simulation model invasion that incorporates with...
Understanding how biotic mechanisms confer stability in variable environments is a fundamental quest ecology, and one that becoming increasingly urgent with global change. Several mechanisms, notably portfolio effect associated species richness, compensatory dynamics generated by negative covariance selection for stable dominant populations can increase the of overall community. While importance these debated, few studies have contrasted their an environmental context. We analyzed nine...