Rapid plastic responses to chronic hypoxia in the bearded fireworm, Hermodice carunculata (Annelida: Amphinomidae)

Grimes, Candace J.; Paiva, Paulo Cesar; Petersen, Lene H.; Schulze, Anja

doi:10.1007/s00227-020-03756-0

Cited by 7 publications

(10 citation statements)

References 49 publications

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“…The worms used in this study had likely never been exposed to hypoxia before, so it is not surprising that we see different expression trends at timepoint 1 and 3. The increase in expression of genes related to epithelial morphogenesis after 6 h (Table 5 ) may be the first sign of increasing branchial filament formation in this species to cope with hypoxic conditions, which occurs both under intermittent 38 and chronic hypoxia 39 . Although fireworms most likely cannot increase their branchial surface area within six hours, this short time may be sufficient to trigger the onset of branchial tissue formation.…”

Section: Discussionmentioning

confidence: 93%

“…Although the bearded fireworm is motile, its slow speed and limited movement range are likely to impede its escape from a large-area hypoxic event. In captivity, this amphinomid climbs toward the surface of the water when DO is lowered, either by crawling up the wall of aquaria or onto rock surfaces 38 , 39 . Recently, Yáñez-Rivera and Salazar-Vallejo 34 proposed the existence of two species: H. carunculata in the Western Atlantic and H. nigrolineata Iin the Eastern Atlantic, and the distinction between the two was based primarily on the number of branchial filaments 40 .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Yáñez-Rivera and Salazar-Vallejo 34 proposed the existence of two species: H. carunculata in the Western Atlantic and H. nigrolineata Iin the Eastern Atlantic, and the distinction between the two was based primarily on the number of branchial filaments 40 . However, based on molecular evidence 41 and phenotypic plasticity of branchiae in response to DO conditions 38 , 39 , H. nigrolineata is now considered a junior synonym to H. carunculata .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Previous work has focused on morphological changes and oxygen uptake in H. carunculata in response to hypoxia 27 , 38 , 39 . Most notably, branchial surface area increases in response to both intermittent 38 and chronic 39 hypoxia. While the effect on oxygen uptake rates during hypoxia is small 27 , 38 , hypoxia exposure results in a long-term elevation of the metabolic rate, potentially leading to increased feeding activity 27 .…”

Section: Introductionmentioning

confidence: 99%

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Differential gene expression indicates modulated responses to chronic and intermittent hypoxia in corallivorous fireworms (Hermodice carunculata)

Grimes

Petersen

Schulze

2021

Sci Rep

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Climate models predict an increase in extent, frequency, and duration of marine hypoxia events in the twenty first century. A better understanding of organismal responses to hypoxia in individual species is a crucial step for predicting ecosystem responses. We experimentally subjected a common invertebrate, the bearded fireworm (Hermodice carunculata) to two levels of chronic hypoxia and, in a separate experiment, to intermittent hypoxia. We found components of the conserved hypoxia-inducible factor (HIF) pathway and show a modulated response to hypoxia depending on the severity of hypoxic stress: under mild hypoxia, only the HIF-1α subunit is upregulated, while expression of the other subunit, aryl hydrocarbon nuclear translator, only increases significantly at more severe hypoxia levels. The chronic trials revealed down-regulation of genes related to cell adhesion, transport, development and heme-binding, and up-regulation of genes related to glycolysis, oxygen binding, cell differentiation, digestive and reproductive function. The intermittent hypoxia trials revealed an upregulation of heme transporter activity during hypoxia, and our time series analysis characterized nine clusters of genes with similar expression patterns. Our findings suggest that H. carunculata is likely to tolerate, and be resilient to, predicted future hypoxia conditions.

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Differential gene expression indicates modulated responses to chronic and intermittent hypoxia in corallivorous fireworms (Hermodice carunculata)

Grimes

Petersen

Schulze

2021

Sci Rep

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Effect of temperature and body size on anterior and posterior regeneration in Hermodice carunculata (Polychaeta, Amphinomidae)

Toso,

Mammone,

Rossi

et al. 2024

Mar Biol

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In recent years, population outbreaks of the annelid Hermodice carunculata (Polychaeta, Amphinomidae) are recurrently detected along the coastal zone of the Salento peninsula (Southern Italy), with impacts on marine benthic ecosystems. Annelida are renowned for their remarkable regeneration potential, enabling them to reform lost body parts. A handful of studies have reported posterior regeneration of H. carunculata, but anterior regeneration has not been fully explored. In this study, we investigated the capacity of H. carunculata collected in shallow coastal areas (Ionian Sea, 40°08’26.9” N 17°58’44.1” E) to regenerate anterior body parts under different temperature conditions (22 and 14 °C) and considering two different body sizes (∼ 4 g and 25 g). In addition, histological analysis and lipid analyses were carried out to detect changes in the reproductive cycle and lipid storage during ongoing regeneration. The results suggest that small and large-sized specimens of H. carunculata can regenerate efficiently anterior body parts in 12–20 weeks post amputation when kept at 22 °C. Small-sized worms kept at 14 °C regenerated slower but died in 24 weeks post amputation before regenerating a mouth, while large-sized worms kept at 14 °C were affected by a 100% mortality during blastema formation. In addition, lipid extraction analyses show that H. carunculata can regenerate during extended periods of starvation by de novo synthesizing lipid reserves and regeneration in H. carunculata does not negatively impact the reproductive cycle, as gametogenesis occurs also during the regenerative processes.

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Acclimation to cyclic hypoxia improves thermal tolerance and copper survival in the caridean shrimp Palaemon varians

Peruzza

Thatje

Hauton

2021

Comparative Biochemistry and Physiology Part A: Molecular &

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Rapid plastic responses to chronic hypoxia in the bearded fireworm, Hermodice carunculata (Annelida: Amphinomidae)

Cited by 7 publications

References 49 publications

Differential gene expression indicates modulated responses to chronic and intermittent hypoxia in corallivorous fireworms (Hermodice carunculata)

Differential gene expression indicates modulated responses to chronic and intermittent hypoxia in corallivorous fireworms (Hermodice carunculata)

Effect of temperature and body size on anterior and posterior regeneration in Hermodice carunculata (Polychaeta, Amphinomidae)

Acclimation to cyclic hypoxia improves thermal tolerance and copper survival in the caridean shrimp Palaemon varians

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