The effects of temperature, activity and convection on the plastron PO2 of the aquatic bug Aphelocheirus aestivalis (Hemiptera; Aphelocheiridae)

Jones, Karl K.; Hetz, Stefan K.; Seymour, Roger S.

doi:10.1016/j.jinsphys.2017.07.001

Cited by 16 publications

(9 citation statements)

References 38 publications

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“…Under these conditions, aerial gas exchange by surfacing represents a more convenient respiratory strategy when compared to under water gas exchange. Other aquatic insects that rely on diffusive oxygen uptake via a plastron likewise depend on cold, flowing water ( Jones et al, 2018 ) and are more prone to oxygen limitation ( Verberk and Bilton, 2015 ).…”

Section: Discussionmentioning

confidence: 99%

Does plasticity in thermal tolerance trade off with inherent tolerance? The influence of setal tracheal gills on thermal tolerance and its plasticity in a group of European diving beetles

Verberk

Calosi

Spicer

et al. 2018

Journal of Insect Physiology

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Section: Discussionmentioning

confidence: 99%

Does plasticity in thermal tolerance trade off with inherent tolerance? The influence of setal tracheal gills on thermal tolerance and its plasticity in a group of European diving beetles

Verberk

Calosi

Spicer

et al. 2018

Journal of Insect Physiology

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“…The boundary layer typically is defined as the distance from the surface at which flow velocity reaches 90 or 95% of free stream velocity. In thick boundary layers, formed in slow-moving water, oxygen levels adjacent to respiratory surfaces can become more depleted by metabolic demand than they do in thin boundary layers, which form in fast, turbulent flows [4,12,32,33]. We therefore expect that heat and hypoxia tolerance limits of organisms, which depend on temperature-oxygen interactions, should be strongly influenced by variation in water flow velocity [12,[33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

“…In thick boundary layers, formed in slow-moving water, oxygen levels adjacent to respiratory surfaces can become more depleted by metabolic demand than they do in thin boundary layers, which form in fast, turbulent flows [4,12,32,33]. We therefore expect that heat and hypoxia tolerance limits of organisms, which depend on temperature-oxygen interactions, should be strongly influenced by variation in water flow velocity [12,[33][34][35][36]. Although previous studies have found support for this prediction [36][37][38], flow is rarely included in more recent studies on the tolerance limits of aquatic ectotherms, even though flow regimes are predicted to change significantly with climate change.…”

Section: Introductionmentioning

confidence: 99%

Flow increases tolerance of heat and hypoxia of an aquatic insect

et al. 2021

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Recent experiments support the idea that upper thermal limits of aquatic insects arise, at least in part, from a lack of sufficient oxygen: rising temperatures typically stimulate metabolic demand for oxygen more than they increase rates of oxygen supply from the environment. Consequently, factors influencing oxygen supply, like water flow, should also affect thermal and hypoxia tolerance. We tested this hypothesis by measuring the effects of experimentally manipulated flows on the heat and hypoxia tolerance of aquatic nymphs of the giant salmonfly (Plecoptera: Pteronarcys californica ), a common stonefly in western North America. As predicted, stoneflies in flowing water (10 cm s −1 ) tolerated water that was approximately 4°C warmer and that contained approximately 15% less oxygen than did those in standing water. Our results imply that the impacts of climate change on streamflow, such as changes in patterns of precipitation and decreased snowpack, will magnify the threats to aquatic insects from warmer water temperatures and lower oxygen levels.

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“…This endogenous metabolic suppression suggests the presence of diapause in this species (Lester & Irwin, 2012). This study also showed that D. armandi larvae could adjust their respiratory metabolism and related enzyme activities to improve their adaptation under cold stress (Feng et al, 2018;Jones et al, 2018).…”

Section: Discussionmentioning

confidence: 57%

Effects of cold stress on metabolic regulation in the overwintering larvae of the Chinese white pine beetle, Dendroctonus armandi

Dai

Ning

et al. 2020

Entomologia Exp Applicata

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The Chinese white pine beetle, Dendroctonus armandi Tsai & Li (Coleoptera: Curculionidae, Scolytinae), is considered the most destructive forest pest in the Qinling and Bashan Mountains of China. In recent years, winter temperature has dropped in these regions, and extremely low temperatures are hard to survive for insects. Cold hardiness becomes a crucial strategy because temperature change often leads to fluctuations in insect abundance, and the metabolism rate is a key index of resistance to cold in overwintering insects. Therefore, we investigated the relationship between the change in respiratory rate and the activity of metabolism-related mitochondrial enzymes in D. armandi larvae under cold conditions. We found that the respiratory rate decreased, and it was matched with the activity of glutamate dehydrogenase, aconitase, and lipase during overwintering. Among the various test times under cold conditions, the respiratory rate also decreased with decreasing temperature and increased under very low temperatures. At all cold stress periods, glutamate dehydrogenase and lipase showed increased activity at higher temperatures and decreased activity under lower temperatures, but the activity of NAD-malic enzyme, NADP-malic enzyme, mitochondrial isocitrate dehydrogenase, and aconitase were contrary. Under all low temperatures, the activity of enzymesexcept for NADP-malic enzyme, glutamate dehydrogenase, and lipaseincreased in short-term cold stress and decreased in long-term cold stress at 4, 0, −4, −6, −8, and −10°C. However, at −2°C, the activity of enzymes showed a decreasing trend in short-term treatments and an increasing trend in long-term treatments, except for mitochondrial isocitrate dehydrogenase. The results not only improve our understanding of the metabolic mechanism of cold adaptation in D. armandi, but also provide an important experimental basis for further study and biological pest control.

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The effects of temperature, activity and convection on the plastron PO2 of the aquatic bug Aphelocheirus aestivalis (Hemiptera; Aphelocheiridae)

Cited by 16 publications

References 38 publications

Does plasticity in thermal tolerance trade off with inherent tolerance? The influence of setal tracheal gills on thermal tolerance and its plasticity in a group of European diving beetles

Does plasticity in thermal tolerance trade off with inherent tolerance? The influence of setal tracheal gills on thermal tolerance and its plasticity in a group of European diving beetles

Flow increases tolerance of heat and hypoxia of an aquatic insect

Effects of cold stress on metabolic regulation in the overwintering larvae of the Chinese white pine beetle, Dendroctonus armandi

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