Drought reduces floral resources for pollinators

Climate change is predicted to result in increased occurrence and intensity of drought in many regions worldwide. By increasing plant physiological stress, drought is likely to affect the floral resources (flowers, nectar and pollen) that are available to pollinators. However, little is known about impacts of drought at the community level, nor whether plant community functional composition influences these impacts. To address these knowledge gaps, we investigated the impacts of drought on floral resources in calcareous grassland. Drought was simulated using rain shelters and the impacts were explored at multiple scales and on four different experimental plant communities varying in functional trait composition. First, we investigated the effects of drought on nectar production of three common wildflower species (Lathyrus pratensis, Onobrychis viciifolia and Prunella vulgaris). In the drought treatment, L. pratensis and P. vulgaris had a lower proportion of flowers containing nectar and O. viciifolia had fewer flowers per raceme. Second, we measured the effects of drought on the diversity and abundance of floral resources across plant communities. Drought reduced the abundance of floral units for all plant communities, irrespective of functional composition, and reduced floral species richness for two of the communities. Functional diversity did not confer greater resistance to drought in terms of maintaining floral resources, probably because the effects of drought were ubiquitous across component plant communities. The findings indicate that drought has a substantial impact on the availability of floral resources in calcareous grassland, which will have consequences for pollinator behaviour and populations.

• Publication year

  2018

• Venue

  Global Change Biology

• Publication date

  2018-04-13

• Fields of study

  Biology, Political Science, Medicine, Environmental Science

• Identifiers
  DOI 10.1111/gcb.14130PMID 29652102
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

• Faculty Opinions recommendation of Historical nectar assessment reveals the fall and rise of floral resources in Britain.

  2019influential reference
• High autonomous selfing capacity and low flower visitation rates in a subalpine population of Prunella vulgaris (Lamiaceae)

  2017cited by this paper
• Shifts in water availability mediate plant-pollinator interactions.

  2017cited by this paper
• Interacting effects of climate change and habitat fragmentation on drought-sensitive butterflies

  2017cited by this paper
• Bumblebee family lineage survival is enhanced in high-quality landscapes

  2017cited by this paper
• Generalist social bees maximize diversity intake in plant species-rich and resource-abundant environments

  2017cited by this paper
• Ecosystem functions and vegetation data for Winklebury Hill, Salisbury Plain, UK in 2015

  2017cited by this paper
• Multiple stressors: using the honeybee model BEEHAVE to explore how spatial and temporal forage stress affects colony resilience

  2016cited by this paper
• Drought and leaf herbivory influence floral volatiles and pollinator attraction

  2016influential reference
• Local bumble bee decline linked to recovery of honey bees, drought effects on floral resources.

  2016cited by this paper
• Plant diversity and root traits benefit physical properties key to soil function in grasslands

  2016cited by this paper
• Least-Squares Means: The R Package lsmeans

  2016cited by this paper
• Drought, pollen and nectar availability, and pollination success.

  2016cited by this paper
• Elevated temperature drives a shift from selfing to outcrossing in the insect-pollinated legume, faba bean (Vicia faba)

  2016cited by this paper
• Climate change impacts on pollination

  2016cited by this paper
• A horizon scan of future threats and opportunities for pollinators and pollination

  2016cited by this paper
• Functional mismatch in a bumble bee pollination mutualism under climate change

  2015cited by this paper
• Where is the UK's pollinator biodiversity? The importance of urban areas for flower-visiting insects

  2015cited by this paper
• Bee nutrition and floral resource restoration.

  2015cited by this paper
• Historical nectar assessment reveals the fall and rise of Britain in bloom

  2015cited by this paper
• Climate change reduces nectar secretion in two common Mediterranean plants

  2015cited by this paper
• What functional strategies drive drought survival and recovery of perennial species from upland grassland?

  2015cited by this paper
• Declining resilience of ecosystem functions under biodiversity loss

  2015cited by this paper
• Interacting effects of climate change and habitat fragmentation on drought-sensitive butterflies

  2015cited by this paper
• R: A language and environment for statistical computing.

  2014influential reference
• BEEHAVE: a systems model of honeybee colony dynamics and foraging to explore multifactorial causes of colony failure

  2014cited by this paper
• Fitting Linear Mixed-Effects Models Using lme4

  2014cited by this paper
• Invertebrates, ecosystem services and climate change

  2013cited by this paper
• Increasing drought under global warming in observations and models

  2013cited by this paper
• Four years of simulated climate change reduces above‐ground productivity and alters functional diversity in a grassland ecosystem

  2013cited by this paper
• Drought alters the expression of mating system traits in two species of Clarkia

  2013cited by this paper
• Crop flower visitation by honeybees, bumblebees and solitary bees: Behavioural differences and diversity responses to landscape

  2013cited by this paper
• A global analysis of the impact of drought on net primary productivity

  2013cited by this paper
• Separating Drought Effects from Roof Artifacts on Ecosystem Processes in a Grassland Drought Experiment

  2013cited by this paper
• Root traits contributing to plant productivity under drought

  2013cited by this paper
• Impacts of climate change on the future of biodiversity.

  2012cited by this paper
• The role of resources and risks in regulating wild bee populations.

  2011cited by this paper
• Sainfoin (Onobrychis viciifolia): a beneficial forage legume

  2011cited by this paper
• Photosynthesis and drought: can we make metabolic connections from available data?

  2011cited by this paper
• How many flowering plants are pollinated by animals

  2011cited by this paper
• Differential effects of plant diversity on functional trait variation of grass species.

  2011cited by this paper
• The VGAM Package for Categorical Data Analysis

  2010influential reference
• Leaf herbivory and drought stress affect floral attractive and defensive traits in Nicotiana quadrivalvis

  2010cited by this paper
• Multiple stressors on biotic interactions: how climate change and alien species interact to affect pollination

  2010cited by this paper
• Environment‐enhanced self‐fertilization: implications for niche shifts in adjacent populations

  2010cited by this paper
• Impacts of drought on pollination of Trigonella moabitica (Fabaceae) via bee visitations

  2009influential reference
• Economic valuation of the vulnerability of world agriculture confronted with pollinator decline

  2009cited by this paper
• How does climate warming affect plant-pollinator interactions?

  2009cited by this paper
• The LEDA Traitbase: a database of life‐history traits of the Northwest European flora

  2008cited by this paper
• Long-term resistance to simulated climate change in an infertile grassland

  2008influential reference
• Breeding system, pollinator choice and variation in pollen quality in British herbaceous plants

  2008cited by this paper
• Global warming and the disruption of plant-pollinator interactions.

  2007cited by this paper
• Climate Change 2007: Impacts, Adaptation and Vulnerability.

  2007cited by this paper
• Complementarity as a mechanism of coexistence between functional groups of grasses

  2007cited by this paper
• Scaling of Nectar Foraging in Orchid Bees

  2007cited by this paper
• Importance of pollinators in changing landscapes for world crops

  2007cited by this paper
• Floral diversity and the facilitation of pollination

  2006cited by this paper
• Declines in forage availability for bumblebees at a national scale

  2006cited by this paper
• Flower Choice and Learning in Foraging Bumblebees: Effects of Variation in Nectar Volume and Concentration

  2006cited by this paper
• The Evolutionary Enigma of Mixed Mating Systems in Plants: Occurrence, Theoretical Explanations, and Empirical Evidence

  2005cited by this paper
• Nectar sugar content: estimating standing crop and secretion rate in the field

  2003cited by this paper
• Drought stress, plant water status, and floral trait expression in fireweed, Epilobium angustifolium (Onagraceae).

  2001cited by this paper
• High and Dry: Drought Stress, Sex‐Allocation Trade‐offs, and Selection on Flower Size in the Alpine Wildflower Polemonium viscosum (Polemoniaceae)

  2000cited by this paper
• The response of two contrasting limestone grasslands to simulated climate change.

  2000cited by this paper
• British Plant Communities, Vol. 3: Grasslands and Montane Communities

  1998cited by this paper
• A Comparison of Plant Responses to the Extreme Drought of 1995 in Northern England

  1997cited by this paper
• Does temperature stress induce nectar secretion in Mediterranean plants

  1996cited by this paper
• The ecological flora database.

  1994influential reference
• Influence of water/heat stress on flowering and fruiting of mesquite (Prosopis glandulosa var. glandulosa).

  1992cited by this paper
• ENVIRONMENTAL INFLUENCES ON NECTAR PRODUCTION IN MILKWEEDS (ASCLEPIAS SYRIACA AND A. EXALTATA)

  1992cited by this paper
• Effects of Temperature and Water Stress on Some Floral Nectar Characteristics in Ipomopsis longiflora (Polemoniaceae) under Controlled Conditions

  1990influential reference
• Experimental manipulations of Polemonium foliosissimum: effects on subsequent nectar production, seed production and growth

  1988cited by this paper
• The evolution of empty flowers

  1986cited by this paper
• Ecology, Evolution and Organismal Biology Publications Ecology, Evolution and Organismal Biology Biodiversity Increases the Resistance of Ecosystem Productivity to Climate Extremes

  year unknowninfluential reference

• The CO2 and humidity senses of insects in a changing world.

  2026cites this paper
• Fire buffers drought impacts on reproduction in a resprouting Mediterranean shrub

  2026cites this paper
• The Effects of Global Climate Change on Gene Expression in Honey Bees (Apis mellifera)

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• Productivity‐dependent effects of adapted mowing regimes on arthropod communities in roadside grasslands

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• Bee on Boron—Sufficient Boron Supply of Brassica napus Is Crucial for Attracting Pollinating Insects to Ensure Seed Yield

  2026cites this paper
• Evaluating the ecological effectiveness of landscape-level collaborative conservation: A case study targeting wild bees

  2026cites this paper
• Honey Bee Nutrition

  2026cites this paper
• Bumble bee nest density is lower in drought years.

  2025cites this paper
• Nectar traits of New Zealand trees vary across climatic zones

  2025cites this paper
• A Geospatial atlas of honey bee forage plants and their distribution patterns in Africa and beyond

  2025cites this paper
• Assessing monthly habitat quality for bumblebees in grasslands using a habitat trait model: a case study in Worcestershire, UK

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• Adaptive evolution can mitigate the negative effects of temperature stress on plant–pollinator interactions

  2025cites this paper
• Seasonal direct and indirect effects of local habitat and landscape factors on wild bees in agroecosytems

  2025cites this paper
• Impact of climate change and drought threat on the honey bees food collection.

  2025cites this paper
• Museum genomics suggests long-term population decline in a putatively extinct bumble bee.

  2025cites this paper
• Experimental warming drives local grassland plant species loss

  2025cites this paper
• Plant reproductive strategies and pollinator attributes differ in small-scale habitat heterogeneity

  2025cites this paper
• Grassland Restoration Drives Strong Multitrophic Biodiversity Recovery, but Climate Extremes Jeopardize Drought‐Sensitive Species

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• An Innovative Multi-Omics Approach Reveals the Interactions Between Honeybees and Their Environment

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• Underlying mechanisms shaping wild bee decline

  2025cites this paper
• Drought stress and intercropping affect pollinator behavior via altered plant and flower traits in a legume

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• Effects of water availability on floral traits and pollinators in a columnar cactus endemic to the Atacama Desert, Chile

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• Soil moisture influences nectar robbing and plant fitness in a primrose species

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• Microalgae functional feed additives strengthen immunity and increase longevity in honey bees.

  2025cites this paper
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• Social-ecological perspective on European semi-natural grassland conservation and restoration: Key challenges and future pathways

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  2024cites this paper
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• Engaging citizens to monitor pollinators through a nationwide BioBlitz: Lessons learned and challenges remaining after four years

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• Floral nectar (FN): drivers of variability, causes, and consequences

  2024cites this paper
• The effect of global change on the expression and evolution of floral traits.

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• A blood test to monitor bee health across a European network of agricultural sites of different land-use by MALDI BeeTyping mass spectrometry.

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