A5028159655- Plant and animal studies
- Plant Parasitism and Resistance
- Ecology and Vegetation Dynamics Studies
- Insect and Pesticide Research
- Insect and Arachnid Ecology and Behavior
- Species Distribution and Climate Change
- Lichen and fungal ecology
- Forest Management and Policy
- Evolutionary Game Theory and Cooperation
- Ecology, Conservation, and Geographical Studies
- Game Theory and Applications
- Olfactory and Sensory Function Studies
- Botany and Plant Ecology Studies
- Bryophyte Studies and Records
- Plant Reproductive Biology
- Primate Behavior and Ecology
- Digital Platforms and Economics
ETH Zurich
2021-2024
University of Nevada, Reno
2020-2022
University of Arizona
2015-2020
Rocky Mountain Biological Laboratory
2016-2018
Climate change is driving species' range shifts, which are in turn disrupting species interactions due to species-specific differences their abilities migrate response climate. We evaluated the consequences of asynchronous shifts an alpine plant-pollinator community by transplanting replicated meadow turfs downslope along elevational gradient thereby introducing them warmer climates and novel plant pollinator communities. asked how these affect reproduction. found that communities differed...
Abstract There is wide consensus that climate change will seriously impact flowering plants and their pollinators. Shifts in phenology insect emergence as well changes the functional traits involved can cause alterations plant-pollinator interactions, pollination success plant reproductive output. Effects of rising temperatures, advanced snowmelt altered precipitation patterns are expected to be particularly severe alpine habitats due constrained season upper range margins. Yet, our...
Summary Mutualisms are only rarely one‐to‐one interactions: each species generally interacts with multiple mutualists. Exploitation is ubiquitous in mutualisms, and we would therefore expect that mutualist exploiters as well. Exploiter may also interact one another. For example, the action of exploiter might open opportunity for exploitation by a second species. common many plant–pollinator mutualisms: ‘primary’ nectar robbers feed through holes they make flowers, which can be subsequently...
Abstract Neonicotinoid pesticides in the nectar and pollen of managed crops wildflowers contribute to global declines bees. These chemicals can have detrimental effects on bees' physiology, behaviour reproduction. Floral also contains secondary chemistry with its own bee health. How may act additively or synergistically neonicotinoids is unknown. Here, we asked how an acute exposure a common neonicotinoid, imidacloprid (IMD) affected longevity, immune function bumble Bombus impatiens workers...
Animals foraging from flowers must assess their environment and make critical decisions about which patches, plants, to exploit obtain limiting resources. The cognitive ecology of plant-pollinator interactions explores not only the complex nature pollinator behavior decision making, but also how cognition shapes pollination plant fitness. Floral visitors sometimes depart what we think as typical instead floral resources by robbing nectar (bypassing opening consuming through holes or...
1. Competition alters animal foraging, including promoting the use of alternative resources. It may also impact how animals feed when they are able to handle same food with more than one tactic. likely impacts both consumers and their resources through its effects on handling, but this topic has received little attention. 2. Bees often two tactics for extracting nectar from flowers: can visit at flower opening, or rob holes base flowers. Exploitative competition is thought promote robbing....
Pollinator populations face growing threats from global climate change, particularly in alpine environments with rapidly rising temperatures. Understanding how bumblebees, critical pollinators, respond to these temperature changes is therefore an important goal. Predicting species’ responses change requires several different approaches, one of which compare processes at elevations, experience regimes. Bumblebee body size linked fitness through its influence on nutritional requirements and...
In mutualistic interactions, the decision whether to cooperate or cheat depends on relative costs and benefits of each strategy. pollination mutualisms, secondary nectar robbing is a facultative behavior employed by diverse array nectar‐feeding organisms, thought be form cheating. Primary robbers create holes in floral tissue through which they feed nectar, whereas robbers, often lack chewing mouthparts, existing holes. Because primary make more readily available facilitate behaviors...
Many plants that bear hidden or recessed floral nectar experience robbing, the removal of by a visitor through holes pierced in corolla. Although robbing can reduce plant reproductive success, many studies fail to find such effects. We outline three mechanistic hypotheses explain when interactions between and nectar‐robbers should be commensal rather than antagonistic: non‐discrimination (pollinators do not avoid robbed flowers), prevalence (robber visitation is rare relative pollinator...
Organisms engage in multiple species interactions simultaneously. While pollination studies generally focus on plants and pollinators exclusively, secondary robbing, a behavior that requires other (primary robbers) to first create access holes corollas, is common. It has been shown robbing can reduce plants' female fitness; however, we lack knowledge about its impact male plant fitness.We experimentally simulated primary the monocarpic perennial Ipomopsis aggregata (Polemoniaceae),...
Die Erhaltung der Biodiversität ist eine gesellschaftliche Herausforderung. gesetzten Schutzziele werden bisher oft nur unvollständig oder nicht erreicht. Kann ein stärkerer Wissenstransfer zwischen Forschung und Praxis dazu beitragen, Antworten auf Fragen aus Naturschutzpraxis zu finden? Das Synthesezentrum probiert es aus.
Floral herkogamy, or the spatial separation of reproductive structures, plays an important role in evolution plant mating systems. One form herkogamy is enantiostyly, alternate presentation stigmas to left and right floral axis. Theoretically, enantiostyly increases outcrossing rate by promoting reciprocal pollen deposition export, but empirical evidence this lacking. Understanding how pollinators interact with enantiostylous flowers will illuminate mechanisms which encourages outcross...
Datura wrightii (Solanaceae), a common shrub in the southwestern United States, bears massive, white, night-blooming flowers that attract and reward hawkmoth pollinators. However, Apis mellifera (honeybee) foragers are often observed on its flowers, especially at dusk dawn hours. Their foraging activities focused anthers, suggesting they could be pollen thieves. We used series of observations manipulative experiments to determine if honeybees detrimental or beneficial D. wrightii. found were...
Pollinator declines worldwide are detrimental for plants. Given the negative effects that antagonisitc visitors, including nectar robbers, can sometimes inflict, might in their populations instead confer benefits? During 1970s, reproductive biology of Colorado columbine, Aquilegia caerulea (Ranunculaceae), was documented near Gothic, Colorado. At time, Bombus occidentalis, Western Bumble bee, one its many pollinators, but more commonly acted as only known robber. occidentalis abundance has...