Long-Term m5C Methylome Dynamics Parallel Phenotypic Adaptation in the CyanobacteriumTrichodesmium DOI Creative Commons
Nathan G. Walworth, Michael Lee, Egor Dolzhenko

et al.

Molecular Biology and Evolution, Journal Year: 2020, Volume and Issue: 38(3), P. 927 - 939

Published: Oct. 3, 2020

Abstract A major challenge in modern biology is understanding how the effects of short-term biological responses influence long-term evolutionary adaptation, defined as a genetically determined increase fitness to novel environments. This particularly important globally microbes experiencing rapid global change, due their on food webs, biogeochemical cycles, and climate. Epigenetic modifications like methylation have been demonstrated plastic responses, which ultimately impact adaptive environmental change. However, there remains paucity empirical research examining dynamics during adaptation nonmodel, ecologically microbes. Here, we show first evidence marine prokaryote for m5C methylome correlated with phenotypic CO2, using 7-year evolution experiment (1,000+ generations) biogeochemically cyanobacterium Trichodesmium. We identify methylated sites that rapidly changed response high (750 µatm) CO2 exposure were maintained at least 4.5 years selection. After 7 selection, however, levels initially responded high-CO2 returned ancestral, ambient levels. Concurrently, adapted growth N2 fixation rates remained significantly higher than those cell lines irrespective concentration, trend consistent genetic assimilation theory. These data demonstrate maintenance CO2-responsive alongside before returning ancestral observations distributed provide critical insights into traits under

Language: Английский

Experimental evolution and the dynamics of adaptation and genome evolution in microbial populations DOI Open Access
Richard E. Lenski

The ISME Journal, Journal Year: 2017, Volume and Issue: 11(10), P. 2181 - 2194

Published: May 16, 2017

Language: Английский

Citations

328
Biogeochemical extremes and compound events in the ocean DOI
Nicolas Gruber, Philip W. Boyd, Thomas L. Frölicher

et al.

Nature, Journal Year: 2021, Volume and Issue: 600(7889), P. 395 - 407

Published: Dec. 15, 2021

Language: Английский

Citations

243
The possible evolution and future of CO2-concentrating mechanisms DOI Open Access
John A. Raven, John Beardall, Patricia Sánchez‐Baracaldo

et al.

Journal of Experimental Botany, Journal Year: 2017, Volume and Issue: 68(14), P. 3701 - 3716

Published: March 14, 2017

CO2-concentrating mechanisms (CCMs), based either on active transport of inorganic carbon (biophysical CCMs) or biochemistry involving supplementary fixation into C4 acids (C4 and CAM), play a major role in global primary productivity. However, the ubiquitous CO2-fixing enzyme autotrophs, Rubisco, evolved at time when atmospheric CO2 levels were very much higher than today O2 was low and, as approached (by no means monotonically), today's levels, some subsequently many organisms CCM that increased supply decreased Rubisco oxygenase activity. Given other environmental factors have altered considerably between autotrophs present day, are predicted to continue change future, we here examine drivers for, possible timing of, evolution CCMs. CCMs probably fell 2-16 times level, depending kinetics. We also assess effects key such temperature nutrient activity evidence for evolutionary changes related cellular processes well limitations continuity through variations.

Language: Английский

Citations

153
Measures and Approaches in Trait-Based Phytoplankton Community Ecology – From Freshwater to Marine Ecosystems DOI Creative Commons
Guntram Weithoff, Beatrix E. Beisner

Frontiers in Marine Science, Journal Year: 2019, Volume and Issue: 6

Published: Feb. 12, 2019

Trait-based approaches to investigate (short- and long-term) phytoplankton dynamics community assembly have become increasingly popular in freshwater marine science. Although the nature of pelagic habitat main taxa ecology are relatively similar both systems, lines research evolved, at least part, separately. We compare contrast adopted ecosystems with respect functional traits. note differences study goals relating trait use that assess those relate ecosystem processes biogeochemical cycling affect type characteristics assigned as traits taxa. Specific relevant for ecological function examined relation herbivory, amplitude environmental change spatial temporal scales study. Major identified, including shorter time scale regular compared open oceans well sampling done by researchers based on site-accessibility. Overall, we encourage researcher better motivate, why they apply trait-based analyses their studies make process-driven approaches, which more common studies. further propose fully comparative conducted along gradient spanning brackish systems or geographic gradients. Such will benefit from combined strength fields.

Language: Английский

Citations

79
Genetic diversity and evolution in eukaryotic phytoplankton: revelations from population genetic studies DOI Open Access
Karin Rengefors, Anke Kremp, Thorsten B. H. Reusch

et al.

Journal of Plankton Research, Journal Year: 2017, Volume and Issue: unknown

Published: Jan. 3, 2017

Eukaryotic phytoplankton exhibit an enormous species richness, displaying a range of phylogenetic, morphological and physiological diversity. Yet, until recently, very little was known about the diversity, genetic variation evolutionary processes within populations. An approach to explore this diversity understand evolution is use population genetics as conceptual framework methodology. Here, we discuss patterns, questions that studies have revealed in eukaryotic phytoplankton. First, describe main biological generating variation. We specifically importance life-cycle complexity for phenotypic consider how such can be maintained during blooms when rapid asexual proliferation dominates. Next, partitioned over time space, with focus on shaping structure, particular selection exchange. Our aim also show used make inferences realized dispersal sexual recombination, these are so difficult study directly. Finally, highlight important open suggest promising avenues future will made possible by new sequencing technologies.

Language: Английский

Citations

85
The Algal Revolution DOI
Juliet Brodie, Cheong Xin Chan, Olivier De Clerck

et al.

Trends in Plant Science, Journal Year: 2017, Volume and Issue: 22(8), P. 726 - 738

Published: June 11, 2017

Language: Английский

Citations

80
Fast adaptation of tropical diatoms to increased warming with trade-offs DOI Creative Commons
Peng Jin, Susana Agustı́

Scientific Reports, Journal Year: 2018, Volume and Issue: 8(1)

Published: Dec. 5, 2018

Abstract Ocean warming with climate change is forcing marine organisms to shift their distributions polewards and phenology. In warm tropical seas, evolutionary adaptation by local species will be crucial avoid predicted desertification reduction in diversity. However, little known about the of phytoplankton seas. Across ocean, diatomic microalgae are main primary producers cold waters; they also contribute communities where play a necessary role biological pump. Here we show that four diatoms isolated from Red Sea adapted conditions (30 °C) after 200–600 generations using various thermal strategies. Two increased optimal growth temperature ( T opt ) maximum rate. The other two did not increase growth, but shifted specialist generalist increasing critical limit. Our data can adapt warming, although trade offs on photosynthetic efficiency, high irradiance stress, lower rate could alter competitive fitness. findings suggest adaptive responses among help arrest sharp decline diversity resulting for waters.

Language: Английский

Citations

78
The impacts of ocean acidification on marine trace gases and the implications for atmospheric chemistry and climate DOI Creative Commons
Frances E. Hopkins, Parvadha Suntharalingam, Marion Gehlen

et al.

Proceedings of the Royal Society A Mathematical Physical and Engineering Sciences, Journal Year: 2020, Volume and Issue: 476(2237)

Published: May 1, 2020

Surface ocean biogeochemistry and photochemistry regulate ocean–atmosphere fluxes of trace gases critical for Earth's atmospheric chemistry climate. The oceanic processes governing these are often sensitive to the changes in pH (or p CO 2 ) accompanying acidification (OA), with potential future climate feedbacks. Here, we review current understanding (from observational, experimental model studies) on impact OA marine sources key climate-active gases, including dimethyl sulfide (DMS), nitrous oxide (N O), ammonia halocarbons. We focus DMS, which available information is considerably greater than other gases. highlight OA-sensitive regions such as polar oceans upwelling systems, discuss combined effect multiple stressors (ocean warming deoxygenation) gas fluxes. To unravel biological mechanisms responsible production, detect adaptation, propose combining process rate measurements longer term experiments using both organisms laboratory natural planktonic communities field. Future observations should be routinely accompanied by two components carbonate system improve our how situ influences production. Together, this will lead improvements capabilities more reliable predictions global

Language: Английский

Citations

68
Extreme Levels of Ocean Acidification Restructure the Plankton Community and Biogeochemistry of a Temperate Coastal Ecosystem: A Mesocosm Study DOI Creative Commons

Carsten Spisla,

Jan Taucher, Lennart T. Bach

et al.

Frontiers in Marine Science, Journal Year: 2021, Volume and Issue: 7

Published: Jan. 25, 2021

The oceans’ uptake of anthropogenic carbon dioxide (CO 2 ) decreases seawater pH and alters the inorganic speciation – summarized in term ocean acidification (OA). Already today, coastal regions experience episodic events during which surface layer drops below values projected for at end century. Future OA is expected to further enhance intensity these extreme events. To evaluate influence such regions, we deployed eight pelagic mesocosms 53 days Raunefjord, Norway, enclosed 56–61 m 3 local containing a natural plankton community under nutrient limited post-bloom conditions. Four were enriched with CO simulate p levels 1978 2069 μatm while other four served as untreated controls. Here, present results from multivariate analyses on OA-induced changes phyto-, micro-, mesozooplankton structure. Pronounced differences emerged early experiment, amplified by enhanced top-down control throughout study period. groups responding most profoundly high conditions cyanobacteria (negative), chlorophyceae auto- heterotrophic microzooplankton variety mesozooplanktonic taxa, including copepoda (mixed), appendicularia (positive), hydrozoa fish larvae gastropoda (negative). restructuring coincided significant concentration elemental stoichiometry particulate organic matter. Results imply that can lead substantial reorganization planktonic food web, affecting multiple trophic phytoplankton primary secondary consumers.

Language: Английский

Citations

55
Reduced H+channel activity disrupts pH homeostasis and calcification in coccolithophores at low ocean pH DOI Creative Commons
Dorothee Kottmeier,

Abdesslam Chrachri,

Gerald Langer

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2022, Volume and Issue: 119(19)

Published: May 6, 2022

Significance Coccolithophore calcification is a major ocean biogeochemical process. While this process likely to be sensitive acidification-driven changes in carbonate chemistry, incomplete understanding of the underlying mechanisms and constraints bottleneck predicting acidification effects on calcification. We report severe disruption pH homeostasis linked loss H + channel function coccolithophore Coccolithus braarudii acclimated seawater values that are encountered currently localized regions more widely future oceans. This leads specific defects coccolith morphology. These findings provide mechanistic insight into how different coccolithophores affected by chemistry.

Language: Английский

Citations

28