R. E. Irwin

Affiliation: North Carolina State University

ORCID: 0000-0002-1394-4946

Works: 84 total (67 publications, 17 datasets, 0 documents)

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Works (84)

All (84)Publications (67)Datasets (17)

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Article

Shorter seasonal snow cover poses a risk to solitary bee populations in a mountainous ecosystem

2025Proceedings of the Royal Society B: Biological SciencesDOI: 10.1098/rspb.2025.1887

Article

Comparative impacts of long-term trends in snowmelt and species interactions on plant population dynamics

2022Journal of EcologyDOI: 10.1111/1365-2745.13875Cited 2 times

Article

Plant removal across an elevational gradient marginally reduces rates, substantially reduces variation in mineralization

2022EcologyDOI: 10.1002/ecy.3546Cited 9 times

Article

Life-history traits predict responses of wild bees to climate variation

2022Proceedings of the Royal Society B: Biological SciencesDOI: 10.1098/rspb.2021.2697Cited 33 times

Article

Winters are changing: snow effects on Arctic and alpine tundra ecosystems

2022Arctic ScienceDOI: 10.1139/as-2020-0058Cited 150 times

Article

Nectar addition changes pollinator behavior but not plant reproduction in pollen rewarding Lupinus argenteus

2021American Journal of BotanyDOI: 10.1002/ajb2.1613Cited 5 times

Article

The sensory and cognitive ecology of nectar robbing

2021Frontiers in Ecology and EvolutionDOI: 10.3389/fevo.2021.698137Cited 15 times

Article

Bumble bees are constant to nectar-robbing behaviour despite low switching costs

2020Animal BehaviourDOI: 10.1016/j.anbehav.2020.09.008Cited 10 times

Article

Competition for nectar resources does not affect bee foraging tactic constancy

2020Ecological EntomologyDOI: 10.1111/een.12866Cited 14 times

Article

Support early-career field researchers

2020ScienceDOI: 10.1126/science.abc1261Cited 30 times

Article

Bee phenology is predicted by climatic variation and functional traits

2020Ecology LettersDOI: 10.1111/ele.13583Cited 97 times

Article

Towards a U.S. national program for monitoring native bees

2020Biological Conservation doi 10.1016/j.biocon.2020.108821DOI: 10.1016/j.biocon.2020.108821Cited 110 times

Article

Pollen and vegetative secondary chemistry of three pollen-rewarding lupines

2019American Journal of BotanyDOI: 10.1002/ajb2.1283Cited 11 times

Article

The individual and combined effects of snowmelt timing and frost exposure on the reproductive success of montane forbs

2019Journal of Ecology

Article

Consequences of secondary nectar robbing for male components of plant reproduction

2018American Journal of BotanyDOI: 10.1002/ajb2.1082Cited 9 times

Article

Costs and benefits of alternative food handling tactics help explain facultative exploitation of pollination mutualisms

2018Ecological Society of AmericaDOI: 10.1002/ecy.2395Cited 25 times

Article

Direct and indirect effects of episodic frost on plants growth and reproduction in subalpine wildflowers

2018Global Change Biology

Article

Why are some plant-nectar robber interactions commensalisms?

2018OikosDOI: 10.1111/oik.05440Cited 20 times

Article

Foraging strategy predicts foraging economy in a facultative secondary nectar robber

2017OikosDOI: 10.1111/oik.04229Cited 15 times

Article

Facilitated exploitation of pollination mutualisms: fitness consequences for plants

2017Journal of Ecology

Article

The behavioral ecology of nectar robbing: why be tactic constant?

2017Current Opinion in Insect ScienceDOI: 10.1016/j.cois.2017.05.013Cited 41 times

Article

Interannual bumble bee abundance is driven by indirect climate effects on floral resource phenology

2017Ecology LettersDOI: 10.1111/ele.12854Cited 189 times

Article

Phenological change in a spring ephemeral: implications for pollination and plant fitness

2016Global Change Biology

Article

Seasonal variation in the secondary chemistry of foliar and reproductive tissues of Delphinium nuttallianum.

2016Biochemical Systematics and Ecology

Article

Quantifying direct vs. indirect effects of nectar robbers on male and female components of plant fitness

2015Journal of EcologyDOI: 10.1111/1365-2745.12476Cited 27 times

Article

Nectar yeasts in Delphinium nuttallianum (Ranunculaceae) and their effects on nectar quality

2015Fungal Ecology

Article

The effect of repeated, lethal sampling on wild bee abundance and diversity

2015Methods in Ecology and EvolutionDOI: 10.1111/2041-210x.12375Cited 108 times

Article

Secondary compounds in floral rewards of toxic rangeland plants: impacts on pollinators

2014Journal of Agricultural and Food ChemistryDOI: 10.1021/jf500521wCited 99 times

Article

Yeasts in nectar enhance male fitness in a montane perennial herb

2014EcologyDOI: 10.1890/13-1740.1Cited 109 times

Article

Nectar Yeasts in the Tall Larkspur Delphinium barbeyi (Ranunculaceae) and Effects on Components of Pollinator Foraging Behavior

2014PloS one

Article

Using economic instruments to develop effective management of invasive species: insights from a bioeconomic model

2013Ecological ApplicationsDOI: 10.1890/12-0649.1Cited 33 times

Article

Dose-dependent effects of nectar alkaloids in a montane plant-pollinator community

2013Journal of EcologyDOI: 10.1111/1365-2745.12144Cited 53 times

Article

Norditerpene alkaloid concentrations in tissues and floral rewards of larkspurs and impacts on pollinators

2013Biochemical Systematics and EcologyDOI: 10.1016/j.bse.2012.11.015Cited 72 times

Article

When resources don't rescue: flowering phenology and species interactions affect compensation to herbivory in Ipomopsis aggregata

2012OikosDOI: 10.1111/j.1600-0706.2012.20458.xCited 33 times

Article

Additive effects of herbivory, nectar robbing and seed predation on male and female fitness components of the host plant Ipomopsis aggregata

2011Oecologia

Student Paper

Bee sampling has no effect on bee abundance in montane meadows

2010

Article

Beyond biomass: measuring the effects of community-level nitrogen enrichment on floral traits, pollinator visitation and plant reproduction

2010J of EcologyDOI: 10.1111/j.1365-2745.2010.01648.xCited 145 times

Article

Variation in the phenology and abundance of flowering by native and exotic plants in subalpine meadows

2010Biological Invasions

Article

Realized tolerance to nectar robbing: compensation to floral enemies in Ipomopsis aggregata

2009Annals of Botany

Article

The importance of interannual variation and bottom-up nitrogen enrichment for plant-pollinator networks

2009OikosDOI: 10.1111/j.1600-0706.2009.17740.xCited 85 times

Article

Nectar sugar limits larval growth of solitary bees (Hymenoptera: Megachilidae)

2009Environmental EntomologyDOI: 10.1603/022.038.0441Cited 50 times

Article

The effects of nutrient addition on floral characters and pollination in two subalpine plants, Ipomopsis aggregata and Linum lewisii

2009Plant Ecology

Article

Effects of flowering plant density on pollinator visitation, pollen receipt, and seed production in Delphinium barbeyi

2009American Journal of BotanyDOI: 10.3732/ajb.0800260Cited 61 times

Article

Ecology and evolution of plant-pollinator interactions

2009Annals of BotanyDOI: 10.1093/aob/mcp122Cited 267 times

Article

Mechanisms of tolerance to floral larceny in two animal-pollinated wildflowers, Polemonium viscosum and Ipomopsis aggregata

2008Ecology

Article

Interactions between nectar robbers and seed predators mediated by a shared host plant, Ipomopsis aggregata

2008Oecologia

Article

Evaluation of the field impact of an adventitious herbivore on an invasive plant, yellow toadflax, in CO, USA

2008Plant EcologyDOI: 10.1007/s11258-008-9415-0Cited 12 times

Article

Predicting the effects of nectar robbing on plant reproduction: implications of pollen limitation and plant mating system

2007American Journal of BotanyDOI: 10.3732/ajb.94.12.1935Cited 78 times

Article

The consequences of direct versus indirect spsecies interactions on selection on traits: pollination and nectar robbing in Ipomopsis aggregata

2006American Naturalist

Article

Temporal and spatial variation in pollination of a montane herb: a seven-year study

2005EcologyDOI: 10.1890/04-1274Cited 236 times

Article

The dual role of floral traits: pollinator attraction and plant defense

2004EcologyDOI: 10.1890/03-0390Cited 209 times

Article

Community and evolutionary ecology of nectar.

2004Ecology

Article

Direct and indirect effects of pollinators and seed predators to selection on plant and floral traits

2004OikosDOI: 10.1111/j.0030-1299.2004.12641.xCited 193 times

Article

Impact of nectar robbing on estimates of pollen flow: conceptual predictions and emperical outcomes

2003EcologyDOI: 10.1890/0012-9658(2003)084[0485:ionroe]2.0.co;2Cited 64 times

Article

Linking pollinator visitation rate and pollen receipt

2003American Journal of BotanyDOI: 10.3732/ajb.90.11.1612Cited 158 times

Article

Variation in nectar robbing over time, space, and species

2002OecologiaDOI: 10.1007/s00442-002-1060-zCited 123 times

Article

Volatile production by the buds and corollas of two sympatric, confamial plants, Ipomopsis aggregata and Polemonium foliosissimum

2002Journal of Chemical Ecology

Article

The impact of floral larceny on individuals, populations, and communities

2001OecologiaDOI: 10.1007/s004420100739Cited 230 times

Thesis

Effects of nectar-robbing bumblebees on hummingbird-pollinator behavior and plant reproductive success in Ipomopsis aggregata (Polemoniaceae)

2000

Article

Consequences of nectar robbing for realized male function in a hummingbird-pollinated plant

2000EcologyDOI: 10.1890/0012-9658(2000)081[2637:conrfr]2.0.co;2Cited 73 times

Article

Hummingbird avoidance of nectar-robbed plants: spatial location or visual cues

2000OikosDOI: 10.1034/j.1600-0706.2000.910311.xCited 76 times

Article

Nectar-robbing bumble bees reduce the fitness of Ipomopsis aggregata (Polemoniaceae)

1999Ecology

Article

Nectar Robbing in Ipomopsis aggregata: Effects on Pollinator Behavior and Plant Fitness

1998Oecologia

Article

A trade-off between the frequency and duration of bumblebee visits to flowers

1998OecologiaDOI: 10.1007/s004420050644Cited 31 times

R. E. Irwin

Local Knowledge Graph (Top 60 entities)

Works (84)

Shorter seasonal snow cover poses a risk to solitary bee populations in a mountainous ecosystem

The hole truth: why do bumble bees rob flowers more than once?

Current and lagged climate affects phenology across diverse taxonomic groups

Skewness in bee and flower phenological distributions

Comparative impacts of long-term trends in snowmelt and species interactions on plant population dynamics

Plant removal across an elevational gradient marginally reduces rates, substantially reduces variation in mineralization

Life-history traits predict responses of wild bees to climate variation

Winters are changing: snow effects on Arctic and alpine tundra ecosystems

Nectar addition changes pollinator behavior but not plant reproduction in pollen rewarding <i> Lupinus argenteus</i>

The sensory and cognitive ecology of nectar robbing

Bumble bees are constant to nectar-robbing behaviour despite low switching costs

Competition for nectar resources does not affect bee foraging tactic constancy

Support early-career field researchers

Bee phenology is predicted by climatic variation and functional traits

Towards a U.S. national program for monitoring native bees

Pollen and vegetative secondary chemistry of three pollen-rewarding lupines

The individual and combined effects of snowmelt timing and frost exposure on the reproductive success of montane forbs

Consequences of secondary nectar robbing for male components of plant reproduction

Costs and benefits of alternative food handling tactics help explain facultative exploitation of pollination mutualisms

Direct and indirect effects of episodic frost on plants growth and reproduction in subalpine wildflowers

Why are some plant-nectar robber interactions commensalisms?

Foraging strategy predicts foraging economy in a facultative secondary nectar robber

Facilitated exploitation of pollination mutualisms: fitness consequences for plants

The behavioral ecology of nectar robbing: why be tactic constant?

Interannual bumble bee abundance is driven by indirect climate effects on floral resource phenology

Phenological change in a spring ephemeral: implications for pollination and plant fitness

Seasonal variation in the secondary chemistry of foliar and reproductive tissues of <i>Delphinium nuttallianum</i>.

Quantifying direct vs. indirect effects of nectar robbers on male and female components of plant fitness

Nectar yeasts in <i>Delphinium nuttallianum</i> (Ranunculaceae) and their effects on nectar quality

The effect of repeated, lethal sampling on wild bee abundance and diversity

Secondary compounds in floral rewards of toxic rangeland plants: impacts on pollinators

Yeasts in nectar enhance male fitness in a montane perennial herb

Nectar Yeasts in the Tall Larkspur <i>Delphinium barbeyi</i> (Ranunculaceae) and Effects on Components of Pollinator Foraging Behavior

Using economic instruments to develop effective management of invasive species: insights from a bioeconomic model

Dose-dependent effects of nectar alkaloids in a montane plant-pollinator community

Norditerpene alkaloid concentrations in tissues and floral rewards of larkspurs and impacts on pollinators

When resources don't rescue: flowering phenology and species interactions affect compensation to herbivory in <i>Ipomopsis aggregata</i>

Additive effects of herbivory, nectar robbing and seed predation on male and female fitness components of the host plant <i>Ipomopsis aggregata</i>

Bee sampling has no effect on bee abundance in montane meadows

Beyond biomass: measuring the effects of community-level nitrogen enrichment on floral traits, pollinator visitation and plant reproduction

Variation in the phenology and abundance of flowering by native and exotic plants in subalpine meadows

Realized tolerance to nectar robbing: compensation to floral enemies in <i>Ipomopsis aggregata</i>

The importance of interannual variation and bottom-up nitrogen enrichment for plant-pollinator networks

Nectar sugar limits larval growth of solitary bees (Hymenoptera: Megachilidae)

The effects of nutrient addition on floral characters and pollination in two subalpine plants, <i>Ipomopsis aggregata</i> and <i>Linum lewisii</i>

Effects of flowering plant density on pollinator visitation, pollen receipt, and seed production in <i>Delphinium barbeyi</i>

Ecology and evolution of plant-pollinator interactions

Mechanisms of tolerance to floral larceny in two animal-pollinated wildflowers, <i>Polemonium viscosum</i> and <i>Ipomopsis aggregata</i>

Interactions between nectar robbers and seed predators mediated by a shared host plant, <i>Ipomopsis aggregata</i>

Evaluation of the field impact of an adventitious herbivore on an invasive plant, yellow toadflax, in CO, USA

Predicting the effects of nectar robbing on plant reproduction: implications of pollen limitation and plant mating system

The consequences of direct versus indirect spsecies interactions on selection on traits: pollination and nectar robbing in Ipomopsis aggregata

Temporal and spatial variation in pollination of a montane herb: a seven-year study

The dual role of floral traits: pollinator attraction and plant defense

Community and evolutionary ecology of nectar.

Direct and indirect effects of pollinators and seed predators to selection on plant and floral traits

Impact of nectar robbing on estimates of pollen flow: conceptual predictions and emperical outcomes

Linking pollinator visitation rate and pollen receipt

Variation in nectar robbing over time, space, and species

Volatile production by the buds and corollas of two sympatric, confamial plants, Ipomopsis aggregata and Polemonium foliosissimum

The impact of floral larceny on individuals, populations, and communities

Effects of nectar-robbing bumblebees on hummingbird-pollinator behavior and plant reproductive success in <i>Ipomopsis aggregata</i> (Polemoniaceae)

Consequences of nectar robbing for realized male function in a hummingbird-pollinated plant

Hummingbird avoidance of nectar-robbed plants: spatial location or visual cues

Nectar-robbing bumble bees reduce the fitness of <i>Ipomopsis aggregata</i> (Polemoniaceae)

Nectar Robbing in <i>Ipomopsis aggregata</i>: Effects on Pollinator Behavior and Plant Fitness

A trade-off between the frequency and duration of bumblebee visits to flowers