Capacity of the common Arctic picoeukaryote <i>Micromonas</i> to adapt to a warming ocean

Benner, Ina; Irwin, Andrew J.; Finkel, Zoe V.

doi:10.1002/lol2.10133

Cited by 14 publications

(12 citation statements)

References 39 publications

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“…To the best of our knowledge, this is the first study to report this genus as a major player within the austral pico-phytoplankton. It is unclear if the unprecedented high abundance of M. polaris in Antarctic waters is related to a local and transient phenomena or part of a greater change associated with global climate patterns, since this species seems to be favored by increasing temperatures, enhanced water column stratification and ocean acidification (Benner et al 2019;Hoppe et al 2018;Li et al 2009). We have also 14/58 detected a third Micromonas signature, which could potentially represent a novel Antarctic Micromonas clade ( Figure S5).…”

Section: Antarctic Vs Arctic Phytoplankton Communitiesmentioning

confidence: 89%

Annual phytoplankton dynamics in coastal waters from Fildes Bay, Western Antarctic Peninsula

Trefault

Iglesia

Moreno-Pino

et al. 2020

Preprint

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Year-round reports of phytoplankton dynamics in the West Antarctic Peninsula are rare and mainly limited to microscopy and/or pigment-based studies. We analyzed the phytoplankton community from coastal waters of Fildes Bay in the West Antarctic Peninsula between January 2014 and 2015 using metabarcoding of the nuclear and plastidial 18/16S rRNA gene from both size-fractionated and flow cytometry sorted samples. Each metabarcoding approach yielded a different image of the phytoplankton community with for example Prymnesiophyceae more prevalent in plastidial metabarcodes and Mamiellophyceae in nuclear ones. Overall 14 classes of photosynthetic eukaryotes were present in our samples with the following dominating: Bacillariophyta (diatoms), Pelagophyceae and Dictyochophyceae for division Ochrophyta, Mamiellophyceae and Pyramimonadophyceae for division Chlorophyta, Prymnesiophyceae and Cryptophyceae. Diatoms were dominant in the larger size fractions and during summer, while Prymnesiophyceae and Cryptophyceae were dominant in colder seasons. Pelagophyceae were particularly abundant towards the end of autumn (May). In addition of Micromonas polaris and Micromonas sp. clade B3, both previously reported in Arctic waters, we detected a new Micromonas 18S rRNA sequence signature, close to but clearly distinct from M. polaris, which potentially represent a new clade specific of the Antarctic. These results highlight the need for complementary strategies as well as the importance of year-round monitoring for a comprehensive description of phytoplankton communities in Antarctic coastal waters.

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Section: Antarctic Vs Arctic Phytoplankton Communitiesmentioning

confidence: 89%

Annual phytoplankton dynamics in coastal waters from Fildes Bay, Western Antarctic Peninsula

Trefault

Iglesia

Moreno-Pino

et al. 2020

Preprint

View full text Add to dashboard Cite

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“…To the best of our knowledge, this is the first study to report this genus as a major player within the austral pico-phytoplankton. It is unclear if the unprecedented high abundance of M. polaris in Antarctic waters is related to a local and transient phenomena or part of a greater change associated with global climate patterns, since this species seems to be favored by increasing temperatures, enhanced water column stratification and ocean acidification [68][69][70] . We have also detected a third Micromonas signature, which could potentially represent a novel Micromonas clade that could be endemic to Antarctica (Figure S5).…”

Section: Antarctic Versus Arctic Phytoplankton Communitiesmentioning

confidence: 99%

Annual phytoplankton dynamics in coastal waters from Fildes Bay, Western Antarctic Peninsula

Trefault

Iglesia

Moreno-Pino

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Year-round reports of phytoplankton dynamics in the West Antarctic Peninsula are rare and mainly limited to microscopy and/or pigment-based studies. We analyzed the phytoplankton community from coastal waters of Fildes Bay in the West Antarctic Peninsula between January 2014 and 2015 using metabarcoding of the nuclear and plastidial 18/16S rRNA gene from both size-fractionated and flow cytometry sorted samples. Overall 14 classes of photosynthetic eukaryotes were present in our samples with the following dominating: Bacillariophyta (diatoms), Pelagophyceae and Dictyochophyceae for division Ochrophyta, Mamiellophyceae and Pyramimonadophyceae for division Chlorophyta, Haptophyta and Cryptophyta. Each metabarcoding approach yielded a different image of the phytoplankton community with for example Prymnesiophyceae more prevalent in plastidial metabarcodes and Mamiellophyceae in nuclear ones. Diatoms were dominant in the larger size fractions and during summer, while Prymnesiophyceae and Cryptophyceae were dominant in colder seasons. Pelagophyceae were particularly abundant towards the end of autumn (May). In addition of Micromonas polaris and Micromonas sp. clade B3, both previously reported in Arctic waters, we detected a new Micromonas 18S rRNA sequence signature, close to, but clearly distinct from M. polaris, which potentially represents a new clade specific of the Antarctic. These results highlight the need for complementary strategies as well as the importance of year-round monitoring for a comprehensive description of phytoplankton communities in Antarctic coastal waters.

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“…without diurnal or seasonal fluctuations in temperature and/or pCO 2 ), experimental evolution studies of marine dinoflagellates, diatoms and coccolithophores under high temperature and/or pCO 2 conditions have mostly resulted in adaptation to the new environment (Table 1). Thus, fitness gains have been demonstrated in traits as diverse as cell growth (Aranguren-Gassis et al, 2019;Benner et al, 2020;Buerger et al, 2020;Chakravarti et al, 2017;Chakravarti & van Oppen, 2018;Huertas et al, 2011;Hutchins et al, 2015;Jin et al, 2013;Lohbeck et al, 2012;O'Donnell et al, 2018;Schaum et al, 2018), polyunsaturated fatty acid content (O'Donnell et al, 2019), photo-physiological performance and extracellular ROS level (Buerger et al, 2020;Chakravarti et al, 2017;Chakravarti & van Oppen, 2018). For example, populations of the marine diatom Thalassiosira pseudonana evolved under elevated temperature (32°C) achieved similar growth rates at high temperature compared to wild-type cells grown under control temperature (22°C) after ~100 asexual generations (Schaum et al, 2018).…”

Section: Studies Showing Increased Fitness Following Experiments Evolutionmentioning

confidence: 99%

Adaptive responses of free‐living and symbiotic microalgae to simulated future ocean conditions

Chan

Oakeshott

Buerger

et al. 2021

Global Change Biology

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Marine microalgae are a diverse group of microscopic eukaryotic and prokaryotic organisms capable of photosynthesis. They are important primary producers and carbon sinks but their physiology and persistence are severely affected by global climate change. Powerful experimental evolution technologies are being used to examine the potential of microalgae to respond adaptively to current and predicted future conditions, as well as to develop resources to facilitate species conservation and restoration of ecosystem functions. This review synthesizes findings and insights from experimental evolution studies of marine microalgae in response to elevated temperature and/or pCO2. Adaptation to these environmental conditions has been observed in many studies of marine dinoflagellates, diatoms and coccolithophores. An enhancement in traits such as growth and photo‐physiological performance and an increase in upper thermal limit have been shown to be possible, although the extent and rate of change differ between microalgal taxa. Studies employing multiple monoclonal replicates showed variation in responses among replicates and revealed the stochasticity of mutations. The work to date is already providing valuable information on species’ climate sensitivity or resilience to managers and policymakers but extrapolating these insights to ecosystem‐ and community‐level impacts continues to be a challenge. We recommend future work should include in situ experiments, diurnal and seasonal fluctuations, multiple drivers and multiple starting genotypes. Fitness trade‐offs, stable versus plastic responses and the genetic bases of the changes also need investigating, and the incorporation of genome resequencing into experimental designs will be invaluable.

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Capacity of the common Arctic picoeukaryote Micromonas to adapt to a warming ocean

Cited by 14 publications

References 39 publications

Annual phytoplankton dynamics in coastal waters from Fildes Bay, Western Antarctic Peninsula

Annual phytoplankton dynamics in coastal waters from Fildes Bay, Western Antarctic Peninsula

Annual phytoplankton dynamics in coastal waters from Fildes Bay, Western Antarctic Peninsula

Adaptive responses of free‐living and symbiotic microalgae to simulated future ocean conditions

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