Oxygen and capacity limited thermal tolerance of the lugworm Arenicola marina: A seasonal comparison

Schröer, Mareike; Saphörster, Julia; Bock, Christian; Pörtner, Hans‐Otto

doi:10.1016/j.jembe.2011.09.011

Cited by 8 publications

(4 citation statements)

References 44 publications

(21 reference statements)

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“…In other words, minimum and maximum temperatures were obtained from the species' occurrence reported in the GBIF online database 1 for the Mediterranean Sea. Starting from the water acclimation temperature, the temperature in each group was increased or decreased to the next level at a rate of 1 • C per hour (e.g., Schröer et al, 2011;Prusina et al, 2014;Montalto et al, 2017). Respiration rate was calculated according to Sarà et al (2013):…”

Section: Laboratory Experimentsmentioning

confidence: 99%

Predictive Metabolic Suitability Maps for the Thermophilic Invasive Hydroid Pennaria disticha Under Future Warming Mediterranean Sea Scenarios

2022

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Temperature is a fundamental variable for all biological processes. It influences the metabolism and tolerance limits of all living organisms, affecting species phenology and distribution patterns. It also facilitates the spread of non-indigenous species and the proliferation and expansion of native outbreak-forming species. Pennaria disticha is a colonial benthic cnidarian reported to be invasive in different Indian and Pacific coastal areas, as well as a harmful member of fouling communities found in Mediterranean marine aquaculture farms. Using the most basal functional trait (i.e., thermal tolerance), we explored the potential of P. disticha to colonize different habitats across the Mediterranean Sea in future warming scenarios. Respiration rate was measured as a proxy of P. disticha metabolism under 12 different experimental temperatures. The obtained thermal tolerance dataset was used to create a thermal performance curve (TPC). We then scaled modeled curve to occurrence probability to map species potential metabolic habitat suitability and phenological shifts within the Mediterranean Sea when subjected to different warming scenarios. Prediction maps for future climatic conditions showed a potential temporal and spatial expansion of P. disticha in the Western and Central Mediterranean. The present data increases our understanding of the ecological performance and potential distribution of an invasive and outbreak-forming species. This information will contribute to the development of early warning systems and to the design and implementation of risk assessment and management plans.

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Section: Laboratory Experimentsmentioning

confidence: 99%

Predictive Metabolic Suitability Maps for the Thermophilic Invasive Hydroid Pennaria disticha Under Future Warming Mediterranean Sea Scenarios

2022

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“…The incapacity of oxygen metabolism in heat-stressed ghost moths raises an interesting question, whether ambient oxygen levels affect their thermal tolerance. This question is addressed by the oxygen and capacity-limited thermal tolerance (OCLTT) hypothesis, which suggests that a mismatch between oxygen availability and metabolic demands during heating constrains the thermal tolerance of organisms (Pörtner, 2001(Pörtner, , 2006Pörtner & Peck, 2010;Schröer et al, 2011;Pörtner et al, 2017). A frequently used criterion for OCLTT is whether a positive correlation exists between ambient oxygen levels and CT max .…”

Section: Mechanisms Of Heat Susceptibility In Ghost Mothsmentioning

confidence: 99%

Metabolomics reveals the key role of oxygen metabolism in heat susceptibility of an alpine‐dwelling ghost moth, Thitarodes xiaojinensis (Lepidoptera: Hepialidae)

et al. 2018

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Ghost moths inhabiting the alpine meadows of the Tibetan Plateau are cold-adapted stenothermal organisms that are susceptible to heat (dead within 7 days at 27 °C exposure). Exploring the metabolic basis of their heat susceptibility would extend our understanding of the thermal biology of alpine-dwelling invertebrates. Here, gas chromatography-mass spectrometry-based metabolomics was combined with physiological and transcriptional approaches to determine the metabolic mechanisms of heat susceptibility in Thitarodes xiaojinensis larvae. The metabolomics results showed that 27 °C heat stress impaired the Krebs cycle and lipolysis in T. xiaojinensis larvae, as demonstrated by the accumulation of intermediary metabolites. In addition, carbohydrate reserves were highly and exclusively consumed, and an anaerobic product, lactate, accumulated. This evidence suggested a strong reliance on glycolysis to anaerobically generate energy. The respiration rate and enzymatic activity test results indicated a deficiency in O metabolism; in addition, the Krebs cycle capacity was not decreased, and the metabolic flux through aerobic pathways was limited. These findings were further supported by the occurrence of hypoxia symptoms in midgut mitochondria (vacuolation and swelling) and increased transcription of hypoxia-induced factor 1-α. Overall, heat stress caused O limitation and depressed the overall intensity of aerobic metabolism in ghost moths, and less efficient anaerobic glycolysis was activated to sustain their energy supply. As carbohydrates were depleted, the energy supply became deficient. Our study presents a comprehensive metabolic explanation for the heat susceptibility of ghost moths and reveals the relationship between O metabolism and heat susceptibility in these larvae.

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“…These findings are in line with evolutionary temperature adaptation to the colder environment in the sub-Arctic population. The thermal window of a species shifts with seasonal acclimatisation or latitudinal adaptation to different temperatures (Sommer et al 1997;Chapple et al 1998;Van Dijk et al 1999;Sommer and Pörtner 2002;Wittmann et al 1 3 2008;Schröer et al 2009;Schröer et al 2011). In general, the thermal window is shifted to low temperatures in animals from high latitudes when compared to temperate species and populations (e.g.…”

Section: Thermal Limits Under Normocapniamentioning

confidence: 99%

Impact of ocean acidification on thermal tolerance and acid–base regulation of Mytilus edulis from the White Sea

et al. 2018

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Oxygen and capacity limited thermal tolerance of the lugworm Arenicola marina: A seasonal comparison

Cited by 8 publications

References 44 publications

Predictive Metabolic Suitability Maps for the Thermophilic Invasive Hydroid Pennaria disticha Under Future Warming Mediterranean Sea Scenarios

Predictive Metabolic Suitability Maps for the Thermophilic Invasive Hydroid Pennaria disticha Under Future Warming Mediterranean Sea Scenarios

Metabolomics reveals the key role of oxygen metabolism in heat susceptibility of an alpine‐dwelling ghost moth, Thitarodes xiaojinensis (Lepidoptera: Hepialidae)

Impact of ocean acidification on thermal tolerance and acid–base regulation of Mytilus edulis from the White Sea

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