[PDF] Warm Temperatures Reduce Flower Attractiveness and Bumblebee Foraging | Semantic Scholar (2024)

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This study highlights an important mechanism by which global warming can change plant-pollinator interactions and negatively impact plant fitness, as well as potentially alter plant evolution through changes in phenotypic selection.

The results suggest that generalist plant–pollinator interactions may be resilient to future potential mismatches in the size of the partners but remain to be tested if they are still resilient under the new environmental conditions resulting from global changes.

It is shown that climate change will perturb plant-pollinator mutualisms, causing wide-ranging effects on partner species and diminishing the ecosystem service they provide, and warmed plants produced fewer, lighter seeds, indicating pollinator-mediated fitness costs.

Data showed that high temperatures had a limited effect on the pollinarium reconfiguration time, thus indicating that high temperature had alimited effect on folding compared to the effect that it had on the viability of the pollen.

It is suggested that the transfer of lower‐quality pollen from plants experiencing soil‐moisture limitation led to drought‐induced pollen limitation, which may occur in a wide variety of flowering plant species as climate warming and drought increasingly impact animal‐pollinated systems.

This study is the first to document how short, field-realistic bursts of extreme heat exposure to flowering host plants can indirectly affect bee pollinators and their offspring, with important implications for crop pollination and native bee populations.

This work assessed how exposure to elevated temperatures during development affects the foraging behavior and morphology of workers from commercial and wild Bombus terrestris colonies to provide the first evidence that colony temperature can have striking effects on bumblebee foragingbehavior.

This work suggests that connectance is an attribute of network structure that can be manipulated, with implications for management goals or conservation efforts in these mutualistic communities.

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Plants are able to buffer floral trait expressions against short-term drought events, potentially to maintain pollinator attraction, and bumblebees can recognize differences in intraspecific phenotypes involving morphological traits and scent emission.

The direct physiological effects of temperature on flowering plants and pollinating insects is summarized to highlight ways in which plant and pollinator responses could affect floral resources for pollinators, and pollination success for plants, respectively.

The results strongly suggest that declining nectar production in higher flowers is an adaptation to enhance outcrossing in A. gymnandrum.

It was found that decreasing soil moisture content correlated with decreasing size of all measured morphological traits except stamen length and nectar tube width, which resulted in decreasing visitation rates by bumble bees under lower soil moisture availability.

It is indicated that floral and inflorescence traits act together to influence both pollinator energetics, which affects a plant species’ attractiveness, and the rate of pollen removal, which should affect pollen export.

Nectar rather than pollen appeared to be the main driver of floral choice by insects in this system, and conservation schemes for bees in farmland or gardens might benefit from ensuring that rewarding plant species are present at high density and/or are aggregated in space.

A significant effect of temperature on nectar secretion is found, with a negative effect of very high temperatures in all species, and climate warming will likely have a distinctive effect on both plant and pollinator populations and their interactions across different seasons.

The role of pollen composition on differences in foraging strategies among bumble bee species is demonstrated and may represent major nectar sources for bumblebee species in peaty, wet meadows in South Belgium.

The results suggest that floral area is the primary morphological floral trait related to bee visitation of several distinct bee groups, but that wild bee families and functionally distinct bees groups have unique responses to floral trait expression.

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