Potent social synchronization can override photic entrainment of circadian rhythms

Fuchikawa, Taro; Eban-Rothschild, Ada; Nagari, Moshe; Shemesh, Yair; Bloch, Guy

doi:10.1038/ncomms11662

Cited by 73 publications

(89 citation statements)

References 57 publications

(72 reference statements)

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“…This internal rhythm is generated by a circadian clock (~24 hours long), that regulates numerous physiological and behavioral processes including the sleep/wake cycle. The circadian clock can be synchronized to the environment by different cues (or Zeitgebers ) [5,20], such as light [21], temperature [22], food availability [23], and social interactions [24,25]. Internal clocks are advantageous to animals, enabling them to predict daily recurring events – even in the absence of environmental cues – and aligning their internal processes to the environment [20,26], as for feeding and metabolism [27].…”

Section: Circadian Regulation Of Sleep/wake Statesmentioning

confidence: 99%

To sleep or not to sleep: neuronal and ecological insights

Eban-Rothschild

Giardino

Lecea

2017

Current Opinion in Neurobiology

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Daily, animals need to decide when to stop engaging in cognitive processes and behavioral responses to the environment, and go to sleep. The main processes regulating the daily organization of sleep and wakefulness are circadian rhythms and homeostatic sleep pressure. In addition, motivational processes such as food seeking and predator evasion can modulate sleep/wake behaviors. Here, we discuss the principal processes regulating the propensity to stay awake or go to sleep—focusing on neuronal and behavioral aspects. We first introduce the neuronal populations involved in sleep/wake regulation. Next, we describe the circadian and homeostatic drives for sleep. Then, we highlight studies demonstrating various effects of motivational processes on sleep/wake behaviors, and discuss possible neuronal mechanisms underlying their control.

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Section: Circadian Regulation Of Sleep/wake Statesmentioning

confidence: 99%

To sleep or not to sleep: neuronal and ecological insights

Eban-Rothschild

Giardino

Lecea

2017

Current Opinion in Neurobiology

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“…For chronobiologists, the scope for a Wild Clock approach has been highlighted by evidence that clock regulation in real-world contexts tends to be more complex, and may differ, from expectations based on laboratory studies [109,121,205]. Hence, an important import from ecology is an appreciation of the complexity of the environmental signals that affect biological clocks.…”

Section: (C) Prospects Of a Wild Clock Approachmentioning

confidence: 99%

“…of zeitgebers that entrain animal clocks in a more complex and natural context, but also show that non-photic time givers may override photic entrainment [107][108][109].…”

Section: Converging Key Concepts Of Both Fields: Plasticity and Chronmentioning

confidence: 99%

Two sides of a coin: ecological and chronobiological perspectives of timing in the wild

Helm

Visser

Schwartz

et al. 2017

Phil. Trans. R. Soc. B

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132

199

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Most processes within organisms, and most interactions between organisms and their environment, have distinct time profiles. The temporal coordination of such processes is crucial across levels of biological organization, but disciplines differ widely in their approaches to study timing. Such differences are accentuated between ecologists, who are centrally concerned with a holistic view of an organism in relation to its external environment, and chronobiologists, who emphasize internal timekeeping within an organism and the mechanisms of its adjustment to the environment. We argue that ecological and chronobiological perspectives are complementary, and that studies at the intersection will enable both fields to jointly overcome obstacles that currently hinder progress. However, to achieve this integration, we first have to cross some conceptual barriers, clarifying prohibitively inaccessible terminologies. We critically assess main assumptions and concepts in either field, as well as their common interests. Both approaches intersect in their need to understand the extent and regulation of temporal plasticity, and in the concept of 'chronotype', i.e. the characteristic temporal properties of individuals which are the targets of natural and sexual selection. We then highlight promising developments, point out open questions, acknowledge difficulties and propose directions for further integration of ecological and chronobiological perspectives through Wild Clock research.

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“…Moreover, the disruption and modification of forager honey bee circadian rhythms may affect the overall bee colony temporal structure through disruption of social entrainment. Previous studies have reported that the rhythms of honey bee foragers serve to synchronize the rhythms of the hive-bound nurse bees 43,44 .…”

Section: Discussionmentioning

confidence: 99%

“…Average activity duration was calculated by subtracting the onsets from the offsets of each day (offset time -onset time) and then averaging (Supplemental Figure 4A Sleep was analyzed from the activity data collected from the LAMs. Several studies have shown that lack of movement (beam interruptions) for five consecutive minutes serves as a reliable measure for sleep in honey bees 29,44,45 . Consistent with these studies we defined sleep as 5 min or longer bouts of inactivity.…”

Section: Behavioral Metrics (Data Analysis)mentioning

confidence: 99%

Neonicotinoids Disrupt Circadian Rhythms and Sleep in Honey Bees

Tackenberg

Giannoni-Guzmán

Doll

et al. 2020

Preprint

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Honey bees are critical pollinators in ecosystems and agriculture, but their numbers have significantly declined. Declines in pollinator populations are thought to be due to multiple factors including habitat loss, climate change, increased vulnerability to disease and parasites, and pesticide use. Neonicotinoid pesticides are agonists of insect nicotinic cholinergic receptors, and sub-lethal exposures are linked to reduced honey bee hive survival. Honey bees are highly dependent on circadian clocks to regulate critical behaviors, such as foraging orientation and navigation, time-memory for food sources, sleep, and learning/ memory processes. Because circadian clock neurons in insects receive light input through cholinergic signaling we tested for effects of neonicotinoids on honey bee circadian rhythms and sleep. Neonicotinoid ingestion by feeding over several days results in neonicotinoid accumulation in the bee brain, disrupts circadian rhythmicity in many individual bees, shifts the timing of behavioral circadian rhythms in bees that remain rhythmic, and impairs sleep. Neonicotinoids and light input act synergistically to disrupt bee circadian behavior, and neonicotinoids directly stimulate wake-promoting clock neurons in the fruit fly brain. Neonicotinoids disrupt honey bee circadian rhythms and sleep, likely by aberrant stimulation of clock neurons, to potentially impair honey bee navigation, time-memory, and social communication.

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Potent social synchronization can override photic entrainment of circadian rhythms

Cited by 73 publications

References 57 publications

To sleep or not to sleep: neuronal and ecological insights

To sleep or not to sleep: neuronal and ecological insights

Two sides of a coin: ecological and chronobiological perspectives of timing in the wild

Neonicotinoids Disrupt Circadian Rhythms and Sleep in Honey Bees

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