A5033259536- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Hydrology and Watershed Management Studies
- Soil and Water Nutrient Dynamics
- Rangeland Management and Livestock Ecology
- Peatlands and Wetlands Ecology
- Soil erosion and sediment transport
- Plant and soil sciences
- Rangeland and Wildlife Management
- Sustainable Agricultural Systems Analysis
- Animal Ecology and Behavior Studies
- Fish Ecology and Management Studies
- Economic and Environmental Valuation
- Flood Risk Assessment and Management
- Hydrology and Sediment Transport Processes
- Pasture and Agricultural Systems
- Environmental and Cultural Studies in Latin America and Beyond
- Soil Carbon and Nitrogen Dynamics
- Land Use and Ecosystem Services
- Agricultural and Food Production Studies
- Climate variability and models
- Conservation, Ecology, Wildlife Education
- Biological Control of Invasive Species
The Scarborough Hospital
2014-2024
University of Toronto
2014-2024
University of Colorado Boulder
2023
Ecological Society of America
2020
Universidad Nacional Agraria La Molina
2011-2017
National Agrarian University
2004
Abstract Ecosystems across the globe receive elevated inputs of nutrients, but consequences this for soil fungal guilds that mediate key ecosystem functions remain unclear. We find nitrogen and phosphorus addition to 25 grasslands distributed four continents promotes relative abundance pathogens, suppresses mutualists, does not affect saprotrophs. Structural equation models suggest responses are often indirect primarily mediated by nutrient-induced shifts in plant communities. Nutrient also...
Abstract Causal effects of biodiversity on ecosystem functions can be estimated using experimental or observational designs — that pose a tradeoff between drawing credible causal inferences from correlations and generalizable inferences. Here, we develop design reduces this revisits the question how plant species diversity affects productivity. Our leverages longitudinal data 43 grasslands in 11 countries approaches borrowed fields outside ecology to draw data. Contrary many prior studies,...
Observations and projections for mountain regions show a strong tendency towards upslope displacement of their biomes under future climate conditions. Because climatic topographic heterogeneity, more complex response is expected biodiversity hotspots such as tropical regions. This study analyzes potential changes in the distribution Tropical Andes identifies target areas conservation. Biome models were developed using logistic regressions. These then coupled to an ensemble 8 global project...
Abstract Eutrophication is a widespread environmental change that usually reduces the stabilizing effect of plant diversity on productivity in local communities. Whether this scale dependent remains to be elucidated. Here, we determine relationship between and temporal stability for 243 communities from 42 grasslands across globe quantify chronic fertilization these relationships. Unfertilized with more species exhibit greater asynchronous dynamics among response natural fluctuations,...
ABSTRACT The legacy of the ‘SL > SS principle’, that a single or few large habitat patches (SL) conserve more species than several small (SS), is evident in decisions to protect while down‐weighting ones. However, empirical support for this principle lacking, and most studies find either no difference opposite pattern (SS SL). To resolve dilemma, we propose research agenda by asking, ‘are there consistent, empirically demonstrated conditions leading SL SS?’ We first review summarize...
Significance Predicting the effects of anthropogenic nutrient enrichment on plant communities is critical for managing implications biodiversity and ecosystem services. Plant functional types that fix atmospheric nitrogen (e.g., legumes) may be at particular risk nutrient-driven global decline, yet global-scale evidence lacking. Using an experiment in 45 grasslands across six continents, we showed legume cover, richness, biomass declined substantially with additions. Although legumes...
Abstract Plant damage by invertebrate herbivores and pathogens influences the dynamics of grassland ecosystems, but anthropogenic changes in nitrogen phosphorus availability can modify these relationships. Using a globally distributed experiment, we describe leaf on 153 plant taxa from 27 grasslands worldwide, under ambient conditions with experimentally elevated phosphorus. Invertebrate significantly increased addition, especially grasses non‐leguminous forbs. Pathogen legumes not Effects...
Human activities are transforming grassland biomass via changing climate, elemental nutrients, and herbivory. Theory predicts that food-limited herbivores will consume any additional stimulated by nutrient inputs ('consumer-controlled'). Alternatively, supply is predicted to increase where alter community composition or limited factors other than food ('resource-controlled'). Using an experiment replicated in 58 grasslands spanning six continents, we show addition vertebrate herbivore...
Abstract Reductions in community evenness can lead to local extinctions as dominant species exclude subordinate species; however, herbivores prevent competitive exclusion by consuming otherwise plant species, thus increasing evenness. While these predictions logically result from chronic, gradual reductions evenness, rapid, temporary pulses of dominance may also reduce richness. Short occur biotic or abiotic conditions temporarily favour one a few manifested increased temporal variability...
Environmental change can result in substantial shifts community composition. The associated immigration and extinction events are likely constrained by the spatial distribution of species. Still, studies on environmental typically quantify biotic responses at single (time series within a plot) or temporal (spatial beta diversity time points) scales, ignoring their potential interdependence. Here, we use data from global network grassland experiments to determine how turnover two major forms...
Understanding water level fluctuation patterns in the Great Lakes is one of pillars for designing adaptive management practices that can mitigate impacts extreme levels on shoreline infrastructure and associated economic activities. The present study uses continuous wavelet transformation to conduct a two-dimensional frequency-scale spectral analysis monthly Lake Huron-Michigan. Consistent with past work, we detected 1-, 8-, 12-, 36-year quasi-state periodicities records during 1860–2015...
Biotic and abiotic factors interact with dominant plants-the locally most frequent or the largest coverage-and nondominant plants differently, partially because modify environment where grow. For instance, if compete strongly, they will deplete resources, forcing into a narrower niche space. Conversely, are constrained by environment, might not exhaust available resources but instead may ameliorate environmental stressors that usually limit nondominants. Hence, nature of interactions among...
Abstract Plant species and functional trait diversity have each been shown to improve green roof services. Species differences that contribute ecosystem services are the product of past evolutionary change phylogenetic (PD), which quantifies relatedness among within a community. In this study, we present an experimental framework assess contribution plant community PD for service delivery, data from one season support our hypotheses would be positively correlated with two services: building...
Abstract In search of generalities in biological invasions, it is sometimes forgotten that invader success can be a function both the diversity invaded community and relatedness relative to residents. Both qualities are likely especially important stressful ecosystems, identifying species attributes influence invasions help direct management efforts sensitive ecosystem like those arid regions. Pink Morning Glory, Ipomoea carnea Jaq. (Family: Convolvulaceae), an annual vine native Central...
Lake Erie is the shallowest and most biologically productive system of Great Lakes, surrounded by large urban, industrial, agricultural areas. This combination prompted extensive efforts to promote best management practices (BMPs) mitigate non-point source pollution in Erie’s watershed. Recent technical conceptual advancements caution that significant variability exists BMP efficiency reduce severity runoff nutrient concentrations due differences implementation, dependence operational...