Reduced thermal variability in cities and its impact on honey bee thermal tolerance

Sánchez-Echeverría, Karina; Castellanos, Ignacio; Mendoza‐Cuenca, Luis; Zuria, Iriana; Sánchez‐Rojas, Gerardo

doi:10.7717/peerj.7060

Cited by 23 publications

(20 citation statements)

References 68 publications

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“…We conducted our study in a narrow temporal window and elevation. Considering the long activity period of the species we studied, especially for X. violacea , any acclimation to temperature, as occurs in honey bees (Sánchez‐Echeverría et al ., ), might influence the CT max of these species. Future studies on this species should focus on assessing variations in CT max , as well as CT min , at different periods of the year and at different elevations and latitudes.…”

Section: Discussionmentioning

confidence: 99%

“…However, thermal tolerances remain unknown for most bees and studies addressing the influence of some factors, such as feeding status, sex and acclimation are only available for bumble and honey bees. Although acclimation and feeding status appear not to have an effect on the critical thermal limits of bumble bees (Oyen & Dillon, ), these have a significant effect on honey bees (Sánchez‐Echeverría et al ., ; V.H. Gonzalez, J. Hranitz, J.F.…”

Section: Discussionmentioning

confidence: 99%

“…The critical thermal maximum (CT max ) is the temperature at which an organism loses motor control when exposed to high temperatures (Lutterschmidt & Hutchison, ). CT max appears to have a strong predictive power for understanding bees' responses to changes in land use and climate change (Barthell et al ., ; Hranitz et al ., ; Hamblin et al ., ; Burdine & McCluney, ; Sánchez‐Echeverría et al ., ). However, relatively few studies have assessed the CT max for bees and limited information is available on whether broad spatial patterns in the diversity of bees' thermal tolerance are consistent with those reported for other taxa.…”

Section: Introductionmentioning

confidence: 97%

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Thermal tolerance varies with dim‐light foraging and elevation in large carpenter bees (Hymenoptera: Apidae: Xylocopini)

González

Hranıtz

Percival

et al. 2020

Ecological Entomology

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1. Thermal tolerance has a strong predictive power for understanding the ecology and distribution of organisms, as well as their responses to changes in land use and global warming. However, relatively few studies have assessed thermal tolerances for bees.2. The present study aimed to determine whether the critical thermal maximum (CT max ) of carpenter bees (Apidae: genus Xylocopa Latreille) varies with different patterns of foraging activity and elevation. In addition, the influence of body size, body water content and relative age was examined with respect to their CT max and differences in thoracic temperature (T th ) among species were evaluated.3. The CT max of one crepuscular (Xylocopa olivieri) and two diurnal species (Xylocopa violacea and Xylocopa iris) of carpenter bees was assessed at sea level on the Greek island of Lesvos. To detect variation as a result of elevation, the CT max of a population of X. violacea at 625 m.a.s l. was assessed and compared with that from sea level. 4. Xylocopa olivieri displayed a similar CT max to that of X. violacea but lower than that of X. iris. Body size, body water content, and relative age did not affect CT max . In X. violacea, CT max decreased with elevation and all three species have high T th independent of ambient temperatures.5. The results of the present study are consistent with variations in CT max predicted by broad spatial and temporal patterns reported for other insects, including honey and bumble bees. The implications of the results are discussed aiming to understand the differences in the foraging pattern of these bees.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Thermal tolerance varies with dim‐light foraging and elevation in large carpenter bees (Hymenoptera: Apidae: Xylocopini)

González

Hranıtz

Percival

et al. 2020

Ecological Entomology

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“…In the acorn ant ( Temnothorax curvispinosus ), populations from urban habitats have a slightly greater thermal range: CT min and CT max were 1°C higher in urban populations (Diamond et al ., 2017). A similar trend was documented in the honeybee ( Apis mellifera ; Sánchez‐Echeverría et al ., 2019).…”

Section: Thermal Tolerance and Environmental Conditionsmentioning

confidence: 99%

Adaptations to thermal stress in social insects: recent advances and future directions

Perez

2020

Biological Reviews

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Thermal stress is a major driver of population declines and extinctions. Shifts in thermal regimes create new environmental conditions, leading to trait adaptation, population migration, and/or species extinction. Extensive research has examined thermal adaptations in terrestrial arthropods. However, little is known about social insects, despite their major role in ecosystems. It is only within the last few years that the adaptations of social insects to thermal stress have received attention. Herein, we discuss what is currently known about thermal tolerance and thermal adaptation in social insects – namely ants, termites, social bees, and social wasps. We describe the behavioural, morphological, physiological, and molecular adaptations that social insects have evolved to cope with thermal stress. We examine individual and collective responses to both temporary and persistent changes in thermal conditions and explore the extent to which individuals can exploit genetic variability to acclimatise. Finally, we consider the costs and benefits of sociality in the face of thermal stress, and we propose some future research directions that should advance our knowledge of individual and collective thermal adaptations in social insects.

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“…This can increase survival by up to 190% compared to an isolated queen (in the laboratory [ 42 ]). Although previous studies showed that worker size diversity can improve resistance to starvation and cold temperatures as isolated stresses in laboratory experiments (e.g., [ 18 , 25 , 29 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ]), it is still unclear whether it could provide colony-level benefits during realistic multifactorial overwintering conditions.…”

Section: Introductionmentioning

confidence: 99%

Worker Size Diversity Has No Effect on Overwintering Success under Natural Conditions in the Ant Temnothorax nylanderi

Honorio

Doums

Molet

2021

Insects

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Winter is a difficult period for animals that live in temperate zones. It can inflict high mortality or induce weight loss with potential consequences on performance during the growing season. Social groups include individuals of various ages and sizes. This diversity may improve the ability of groups to buffer winter disturbances such as starvation or cold temperature. Studies focusing on the buffering role of social traits such as mean size and diversity of group members under winter conditions are mainly performed in the laboratory and investigate the effect of starvation or cold separately. Here, we experimentally decreased worker size diversity and manipulated worker mean size within colonies in order to study the effect on overwintering survival in the ant Temnothorax nylanderi. Colonies were placed under natural conditions during winter. Colony survival was high during winter and similar in all treatments with no effect of worker size diversity and mean worker size. Higher brood survival was positively correlated with colony size (i.e., the number of workers). Our results show that the higher resistance of larger individuals against cold or starvation stresses observed in the laboratory does not directly translate into higher colony survival in the field. We discuss our results in the light of mechanisms that could explain the possible non-adaptive size diversity in social species.

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Reduced thermal variability in cities and its impact on honey bee thermal tolerance

Cited by 23 publications

References 68 publications

Thermal tolerance varies with dim‐light foraging and elevation in large carpenter bees (Hymenoptera: Apidae: Xylocopini)

Thermal tolerance varies with dim‐light foraging and elevation in large carpenter bees (Hymenoptera: Apidae: Xylocopini)

Adaptations to thermal stress in social insects: recent advances and future directions

Worker Size Diversity Has No Effect on Overwintering Success under Natural Conditions in the Ant Temnothorax nylanderi

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