A5044284826- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Insect and Arachnid Ecology and Behavior
- Animal Ecology and Behavior Studies
- Marine and coastal plant biology
- Fern and Epiphyte Biology
- Isotope Analysis in Ecology
- Freshwater macroinvertebrate diversity and ecology
- Wildlife Ecology and Conservation
- Fish Ecology and Management Studies
- Plant Parasitism and Resistance
- Evolution and Genetic Dynamics
- Evolutionary Game Theory and Cooperation
- Animal Behavior and Reproduction
- Ecosystem dynamics and resilience
- Marine Biology and Ecology Research
- Land Use and Ecosystem Services
- Aquatic Invertebrate Ecology and Behavior
- Animal and Plant Science Education
- Coastal wetland ecosystem dynamics
- Research Data Management Practices
- Geology and Paleoclimatology Research
- Conservation, Biodiversity, and Resource Management
- Physiological and biochemical adaptations
University of British Columbia
2016-2025
Okanagan University College
2020-2022
University of Northern British Columbia
2018
Canadian Institute for Advanced Research
2018
John Wiley & Sons (United States)
2016
Ecological Society of America
2016
Universidade Estadual de Campinas (UNICAMP)
2016
University of California, Santa Barbara
2004
Ohio Wesleyan University
2004
University of Maryland Center for Environmental Science
2004
Accelerating rates of species extinction have prompted a growing number researchers to manipulate the richness various groups organisms and examine how this aspect diversity impacts ecological processes that control functioning ecosystems. We summarize results 44 experiments manipulated plants plant affects production biomass. show mixtures produce an average 1.7 times more biomass than monocultures are productive monoculture in 79% all experiments. However, only 12% do diverse polycultures...
Rapid changes in biodiversity are occurring globally, yet the ecological impacts of diversity loss poorly understood. Here we use data from marine invertebrate communities to parameterize models that predict how extinctions will affect sediment bioturbation, a process vital persistence aquatic communities. We show species extinction is generally expected reduce but magnitude reduction depends on functional traits individual covary with their risk extinction. As result, particular cause and...
▪ Abstract It has often been argued that conserving biodiversity is necessary for maintaining ecosystem functioning. We critically evaluate the current evidence this argument. Although there substantial diversity able to affect function, particularly plant communities, it unclear if these patterns will hold realistic scenarios of extinctions, multitrophic or larger spatial scales. Experiments are conducted at small scales, very scales which tends increase owing exotics. Stressors may...
One of the most common explanations for an increase in species richness with productivity is what we have dubbed "More Individuals Hypothesis." According to this hypothesis, more productive sites can support higher total abundances and, since increasing function abundance, so will it be productivity. This hypothesis assumes that communities are limited by We tested More Hypothesis using detritivorous aquatic insect tree holes. When holes varying levels (debris amount) were allowed colonized...
Phylogenetic diversity (PD) describes the total amount of phylogenetic distance among species in a community. Although there has been substantial research on factors that determine community PD, exploration consequences PD for ecosystem functioning is just beginning. We argue may be useful predicting functions range communities, from single-trophic to complex networks. Many traits show signal, suggesting can estimate functional trait space community, and thus functioning. Phylogeny also...
A central current debate in community ecology concerns the relative importance of deterministic versus stochastic processes underlying structure. However, concept stochasticity presents several profound philosophical, theoretical and empirical challenges, which we address here. The philosophical argument that nothing nature is truly can be met with following operational neutral ecology: change composition a (i.e. dynamics) neutrally to degree individual demographic events – birth, death,...
1. Plots of local versus regional species richness are an exciting new tool for testing saturation in ecological communities. In this method, the a community is plotted as function its different biogeographical regions. A proportional relationship between and interpreted evidence unsaturated community, that is, with strong evolutionary limits to richness. There will be no correlation saturated whose limited largely by processes. 2. Although at least 36 data sets have now been analysed using...
After much debate, there is an emerging consensus that the composition of many ecological communities determined both by species traits, as proposed niche theory, well chance events. A critical question for ecology is, therefore, which attributes predict dominance deterministic or stochastic processes. We outline two hypotheses organism size could determine processes structure communities, and we test these comparing community in bromeliad phytotelmata three groups organisms (bacteria,...
1 A 2-year study is described which suggests that a positive feedback process results in the destruction of salt-marsh swards and exposure bare sediments at La Perouse Bay, Manitoba, Canada. Lesser snow geese initiate by grubbing for roots rhizomes graminoids (Puccinellia phryganodes Carex subspathacea) spring. The increased rates evaporation from beneath disturbed or destroyed summer result high soil salinities adversely affect growth remaining grazed plants. 2 Above-ground biomass salinity...
Abstract Changes in global and regional precipitation regimes are among the most pervasive components of climate change. Intensification rainfall cycles, ranging from frequent downpours to severe droughts, could cause widespread, but largely unknown, alterations trophic structure ecosystem function. We conducted multi-site coordinated experiments show how variation quantity evenness modulates 210 natural freshwater microcosms (tank bromeliads) across Central South America (18°N 29°S). The...
Metacommunity theory provides an understanding of how spatial processes determine the structure and function communities at local regional scales. Although metacommunity has considered trophic dynamics in past, it been performed idiosyncratically with a wide selection possible dynamics. Trophic needs synthesis few influential axis to simplify future predictions tests. We propose extension ecology that addresses these shortcomings by incorporating variability among levels 'spatial use...
Climate change and biodiversity loss are expected to simultaneously affect ecosystems, however research on how each driver mediates the effect of other has been limited in scope. The multiple stressor framework emphasizes non-additive effects, but may also buffer effects climate change, alter which mechanisms underlie biodiversity-function relationships. Here, we performed an experiment using tank bromeliad ecosystems test various ways that rainfall changes litter diversity jointly determine...
Conventional ecological theory predicts that predators affect nutrient cycling by decreasing the abundance or activity of prey. By using a predator-detritivore-detritus food chain in bromeliads, we show can increase previously undescribed, but broadly applicable, mechanism: reducing export prey emigration. Contrary to expectations, predation on detritivores increases detrital nitrogen uptake bromeliads. Predation reduces detritivore emergence and hence from system. Detritivores therefore...