High thermal plasticity, and vulnerability, in extreme environments at the warm distributional edge: The case of a tidepool shrimp

Amsalem, Eyal; Rilov, Gil

doi:10.1016/j.jembe.2021.151641

Cited by 3 publications

(1 citation statement)

References 63 publications

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“…Splash pools are, consequently, ephemeral habitats in which organisms often experience extreme and recurrent hypersaline and hyperosmotic stress (46)(47)(48)(49). Thus, we investigated how this highly fluctuating environment might influence the life history and multicellular development of C. flexa.…”

Section: Multicellular C Flexa Sheets Occur In a Restricted Salinity ...mentioning

confidence: 99%

Clonal-aggregative multicellularity entrained by salinity in one of the closest relative of animals

Ros-Rocher,

Reyes-Rivera,

Horo

et al. 2024

Preprint

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Multicellularity evolved multiple times independently during eukaryotic diversification. Two distinct mechanisms underpin multicellularity: clonal development (serial cell division of a single precursor cell) and aggregation (in which independent cells assemble into a multicellular entity). Clonal and aggregative development are traditionally considered to be mutually exclusive and to result from independent acquisitions of multicellularity. Here, we show that the choanoflagellate Choanoeca flexa, a close relative of animals that forms contractile monolayers of cells (or "sheet colonies"), develops by an unconventional intermediate mechanism that we name "clonal-aggregative multicellularity". We find that C. flexa sheets can form through purely clonal processes, purely aggregative processes, or a combination of both, depending on experimental conditions. To assess the ecological relevance of these findings, we characterize the natural context of multicellular development in the native environment of C. flexa on the island of Curaçao. We show that the C. flexa life cycle is environmentally regulated by extreme salinity fluctuations in splash pools undergoing cycles of evaporation and refilling. Upon desiccation, C. flexa colonies dissociate into drought-resistant quiescent cells, which resume activity and reform multicellular sheets after rehydration. We hypothesize that clonal-aggregative development reflects selection for fast transitions into and out of multicellularity in the ephemeral context of coastal splash pools. Our findings underscore the potential of the exploration of biodiversity to reveal new fundamental biological phenomena and expand the known option space for both multicellular development and for the origin of animal multicellularity.

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Section: Multicellular C Flexa Sheets Occur In a Restricted Salinity ...mentioning

confidence: 99%

Clonal-aggregative multicellularity entrained by salinity in one of the closest relative of animals

Ros-Rocher,

Reyes-Rivera,

Horo

et al. 2024

Preprint

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Last snail standing? superior thermal resilience of an alien tropical intertidal gastropod over natives in an ocean-warming hotspot

Rilov

Klein²,

Iluz³

et al. 2022

Biol Invasions

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Response of native and invasive grazers to global warming: marine heatwaves vs. gradual trends

Noè,

Bommarito,

Díaz-Morales

et al. 2024

Mar. Ecol. Prog. Ser.

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Ecological responses to global warming are likely driven by a combination of gradual warming trends and extreme climate events, which are increasing in frequency and intensity. Specifically, heatwaves may amplify the impact of ongoing warming, and thus affect species’ physiological responses, behaviour and eventually survival. Here, we tested the hypothesis that a tropical invasive grazer snail, Cerithium scabridum, will be more resilient to the effects of future gradual warming and marine heatwaves (MHWs) than its native congener C. lividulum, co-occurring in rocky intertidal pools along the Levantine coast. Survival and faecal production (as a proxy for feeding rate) of the 2 species were measured under 4 experimental temperature conditions: ambient summer mean (31°C), predicted warming scenario (ambient +3°C), and short-term MHWs (+5°C) added to either ambient or warming treatments, followed by a recovery period. No effect of warming alone was detected on either species, whereas MHW reduced faecal production only in the native C. lividulum. During the recovery period, C. lividulum survival dropped, but the few surviving individuals recovered from the heat stress as indicated by the increase in faecal production. Neither snail species survived under the combination of warming and MHW. These results suggest that both species, living in a thermally fluctuating and often extreme environment, can tolerate a +3°C gradual warming, but only the invasive snail can withstand a +5°C heatwave. However, neither species can endure a severe heatwave on top of predicted gradual warming, potentially leading to population collapse among both species in the region.

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High thermal plasticity, and vulnerability, in extreme environments at the warm distributional edge: The case of a tidepool shrimp

Cited by 3 publications

References 63 publications

Clonal-aggregative multicellularity entrained by salinity in one of the closest relative of animals

Clonal-aggregative multicellularity entrained by salinity in one of the closest relative of animals

Last snail standing? superior thermal resilience of an alien tropical intertidal gastropod over natives in an ocean-warming hotspot

Response of native and invasive grazers to global warming: marine heatwaves vs. gradual trends

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