A5062524908- Plant and animal studies
- Insect and Pesticide Research
- Insect and Arachnid Ecology and Behavior
- Ecology and Vegetation Dynamics Studies
- Plant Parasitism and Resistance
- Species Distribution and Climate Change
- Botany, Ecology, and Taxonomy Studies
- Flowering Plant Growth and Cultivation
- Marine and fisheries research
- Ichthyology and Marine Biology
- Wildlife Ecology and Conservation
- Fish Ecology and Management Studies
- Pleistocene-Era Hominins and Archaeology
- Climate change and permafrost
- Cryospheric studies and observations
- Animal Behavior and Reproduction
- Bee Products Chemical Analysis
- Geology and Paleoclimatology Research
- Animal Ecology and Behavior Studies
- Insect-Plant Interactions and Control
- Plant Reproductive Biology
- Remote Sensing in Agriculture
- Winter Sports Injuries and Performance
- Animal and Plant Science Education
- Allelopathy and phytotoxic interactions
Rocky Mountain Biological Laboratory
2011-2024
Chicago Botanic Garden
2021-2022
Brooklyn Botanic Garden
2022
Florida State University
2015-2021
Center for Plant Conservation
2021
University of Toronto
2011-2018
Institut de Biologia Evolutiva
2014
The University of Western Australia
2011
Griffith University
2009
The acute decline in global biodiversity includes not only the loss of rare species, but also rapid collapse common species across many different taxa. pollinating insects is particular concern because ecological and economic values these provide. western bumble bee ( Bombus occidentalis ) was once North America, this has become increasingly through much its range. To understand potential mechanisms driving declines, we used Bayesian occupancy models to investigate effects climate land cover...
Summary Climate change has induced pronounced shifts in the reproductive phenology of plants, yet we know little about which environmental factors contribute to interspecific variation responses and their effects on fitness. We integrate data from a 43 yr record first flowering for six species subalpine Colorado meadows with 3 snow manipulation experiment perennial forb Boechera stricta (Brassicaceae) same site. analyze onset relation drivers known influence phenology: timing snowmelt,...
Abstract Plant species can influence the pollination and reproductive success of coflowering neighbors that share pollinators. Because some individual pollinators habitually forage in particular areas, it is also possible plant could bloom later. When flowers a preferred decline an area, site‐fidelity may cause flower feeders to stay area switch rather than search for plants new location. A newly blooming quickly inherit set visitors from prior species, therefore experience higher would...
If two plant species share pollinators, it has been proposed that the interaction between them may range from competitive to facilitative, depending on way in which they intermingle. In particular, presence of a rewarding increase rate pollinator visitation less its vicinity, but beneficial be counteracted by detrimental heterospecific pollen transfer. We assessed this trade-off using bumble-bees foraging over gradual spatial transition an indoor cage experiment.We used 'species' artificial...
Understanding the interaction between reward-seeking flower feeding animals and plants requires consideration of dynamic nature nectar secretion. Studies on several suggest that secretion may increase in response to its removal, but it is not clear whether phenomenon widespread. We determined 11 species Colorado mountain wildflowers showed removal-enhanced replenishment (RENR). measured floral phenology, volumes, rate replenishment, compared cumulative produced following five hourly removals...
Considerable uncertainty exists regarding the strength, direction and relative importance of drivers decomposition in tundra biome, partly due to a lack coordinated field studies this remote environment. Here, we analysed 3717 incubations two uniform litter types, green rooibos tea, buried at 330 circum-Arctic alpine sites quantify effects temperature, moisture quality on decomposition. We found surprisingly linear positive relationship between soil temperature across all sites, counter...
In sub-alpine habitats, patchiness in snowpack produces marked, small-scale variation flowering phenology. Plants early- and late-melting patches are therefore likely to experience very different conditions during their periods. Mertensia fusiformis is an early-flowering perennial that varies conspicuously style length within among populations. The hypothesis represents adaptation local time was tested. Specifically, it hypothesized lower air temperatures higher frost risk would favour...
Organisms living in seasonal environments are exposed to different environmental conditions as they transition from one life stage the next across their cycle. How stages respond these varying conditions, and extent which linked, fundamental components of ecology an organism. Nevertheless, influence abiotic biotic factors on parts organism's cycle is often not accounted for, limits our understanding ecological consequences change. We investigated relative importance climate food...
Abstract Natural populations are composed of individuals that vary in their morphological traits, timing and interactions. The distribution a trait can be described by several dimensions, or mathematical moments—mean, variance, skew kurtosis. Shifts the across these moments response to environmental variation help reveal which values gained lost, consequently how filtering processes altering populations. To examine role drivers intraspecific within framework, we investigate body size among...
Plant species that share pollinators can suffer from interspecific pollen deposition. Male reproductive success is inevitably reduced by the loss of to flowers another species. Female be affected stigmatic area or, more strongly, through allelopathic effects which admixture some foreign reduces seed or fruit set. We tested for Taraxacum officinale (Asteracaeae) on set montane wildflowers Erythronium grandiflorum (Liliaceae) and Erysimum capitatum (Brassicaceae), hand-pollinating plants with...
We developed novel artificial flowers that dispense and receive powdered food dyes as pollen analogues while their nectar is replenished by capillary action. Dye receipt, which can be measured colourimetrically, a direct surrogate for receipt or female reproductive success, but also serve to compare donation (male success) from with different colours of dye. By allowing captive bumble bee colonies visit large arrays such flowers, we investigated whether total dye depended on the sugar...
Abstract The pollination biology of the common shrub Pultenaea villosa Willd. was examined in a subtropical dry sclerophyll forest eastern Australia. We determined floral phenology and morphology, timing stigma receptivity anther dehiscence, nectar availability, plant breeding system, flower visitors. shrub's flowers are typical zygomorphic pea with hidden rewards reproductive structures. These require special manipulation for insect access. A range insects visited flowers, although bees...
Pollinator exclusion bags for small herbaceous plants are much more convenient to apply and remove if their bottom edge is made in the form of a cloth tunnel loaded with sand conform terrain. Damage inadvertent selfing flowers minimized.
Abstract Organisms living in seasonal environments are exposed to different environmental conditions as they transition from one life stage the next across their cycle. How stages respond these varying is a fundamental aspect of biology and critical for understanding how organisms will change. Despite importance animal pollinators, we lack basic influence factors cycles. We investigated relative climate conditions, food availability, previous abundance community wild bumble bee species,...
Abstract Widespread shifts in phenological events response to climate change have inspired monitoring programs and new methods for analyzing sparse data. For example, the Weibull distribution is increasingly used estimate dates of hard‐to‐observe events, such as first last flowering dates, sparsely or unsystematically sampled data sets. In contrast, recent application estimator an intensely systematically phenology set unexpectedly found different results than a previous analysis observed...