Evolutionary Adaptation to Temperature. VII. Extension of the Upper Thermal Limit of Escherichia coli

Evolution ◽  
1999 ◽  
Vol 53 (2) ◽  
pp. 386 ◽  
Author(s):  
Judith A. Mongold ◽  
Albert F. Bennett ◽  
Richard E. Lenski
Keyword(s):  
Escherichia Coli ◽  
Evolutionary Adaptation ◽  
Thermal Limit ◽  
Upper Thermal Limit

scholarly journals EVOLUTIONARY ADAPTATION TO TEMPERATURE. VII. EXTENSION OF THE UPPER THERMAL LIMIT OFESCHERICHIA COLI

Evolution ◽  
1999 ◽  
Vol 53 (2) ◽  
pp. 386-394 ◽  
Author(s):  
Judith A. Mongold ◽  
Albert F. Bennett ◽  
Richard E. Lenski
Keyword(s):  
Ofescherichia Coli ◽  
Evolutionary Adaptation ◽  
Thermal Limit ◽  
Upper Thermal Limit

Evolutionary Adaptation to Temperature. III. Adaptation of Escherichia coli to a Temporally Varying Environment

Evolution ◽  
1994 ◽  
Vol 48 (4) ◽  
pp. 1222 ◽  
Author(s):  
Armand M. Leroi ◽  
Richard E. Lenski ◽  
Albert F. Bennett
Keyword(s):  
Escherichia Coli ◽  
Evolutionary Adaptation ◽  
Varying Environment

scholarly journals High mutation rates limit evolutionary adaptation in Escherichia coli

PLoS Genetics ◽  
2018 ◽  
Vol 14 (4) ◽  
pp. e1007324 ◽  
Author(s):  
Kathleen Sprouffske ◽  
José Aguilar-Rodríguez ◽  
Paul Sniegowski ◽  
Andreas Wagner
Keyword(s):  
Escherichia Coli ◽  
Mutation Rates ◽  
Evolutionary Adaptation

scholarly journals EVOLUTIONARY ADAPTATION TO ENVIRONMENTAL pH IN EXPERIMENTAL LINEAGES OF ESCHERICHIA COLI

Evolution ◽  
2007 ◽  
Vol 61 (7) ◽  
pp. 1725-1734 ◽  
Author(s):  
Bradley S. Hughes ◽  
Alistair J. Cullum ◽  
Albert F. Bennett
Keyword(s):  
Escherichia Coli ◽  
Evolutionary Adaptation

scholarly journals Neural dysfunction at the upper thermal limit in the zebrafish

2020 ◽  
Author(s):  
Anna H. Andreassen ◽  
Petter Hall ◽  
Pouya Khatibzadeh ◽  
Fredrik Jutfelt ◽  
Florence Kermen
Keyword(s):  
Heart Rate ◽  
Heat Stress ◽  
High Temperatures ◽  
Neural Activity ◽  
Thermal Tolerance ◽  
Oxygen Availability ◽  
Adult Zebrafish ◽  
Thermal Limit ◽  
Larval Zebrafish ◽  
Upper Thermal Limit

ABSTRACTUnderstanding animal thermal tolerance is crucial to predict how animals will respond to increasingly warmer temperatures, and to mitigate the impact of the climate change on species survival. Yet, the physiological mechanisms underlying animal thermal tolerance are largely unknown. In this study, we developed a method for measuring upper thermal limit (CTmax) in larval zebrafish (Danio rerio) and found that it occurs at similar temperatures as in adult zebrafish. We discovered that CTmax precedes a transient, heat-induced brain-wide depolarization during heat ramping. By monitoring heart rate, we established that cardiac function is sub-optimal during the period where CTmax and brain depolarization occur. In addition, we found that oxygen availability affects both locomotor neural activity and CTmax during a heat stress. The findings of this study suggest that neural impairment due to limited oxygen availability at high temperatures can cause CTmax in zebrafish.HighlightsLarval zebrafish reach their critical thermal limit (CTmax) at similar temperature as adult zebrafishAcute heat stress causes a brain-wide spreading depolarization near the upper thermal limitCTmax precedes brain-wide depolarizationHeart rate declines at high temperatures but is maintained during CTmax and brain depolarizationNeural activity is impaired prior to CTmax and brain-wide depolarizationOxygen availability in the water affects both CTmax and neural activity

scholarly journals Obligate mutualistic cooperation limits evolvability

2020 ◽  
Author(s):  
Benedikt Pauli ◽  
Leonardo Oña ◽  
Marita Hermann ◽  
Christian Kost
Keyword(s):  
Escherichia Coli ◽  
Amino Acids ◽  
Amino Acid ◽  
Environmental Change ◽  
Selection Experiment ◽  
Evolutionary Adaptation ◽  
Darwinian Fitness ◽  
Mutualistic Interaction ◽  
Interaction Partners ◽  
Outstanding Question

AbstractCooperative mutualisms are widespread in nature and play fundamental roles in many ecosystems. Due to the often obligate nature of these interactions, the Darwinian fitness of the participating individuals is not only determined by the information encoded in their own genomes, but also the traits and capabilities of their corresponding interaction partners. Thus, a major outstanding question is how obligate cooperative mutualisms affect the ability of organisms to respond to environmental change with evolutionary adaptation. Here we address this issue using a mutualistic cooperation between two auxotrophic genotypes of Escherichia coli that reciprocally exchange costly amino acids. Amino acid-supplemented monocultures and unsupplemented cocultures were exposed to stepwise increasing concentrations of different antibiotics. This selection experiment revealed that metabolically interdependent bacteria were generally less able to adapt to environmental stress than autonomously growing strains. Moreover, obligate cooperative mutualists frequently regained metabolic autonomy, thus resulting in a collapse of the mutualistic interaction. Together, our results identify a limited evolvability as a significant evolutionary cost that individuals have to pay when entering into an obligate mutualistic cooperation.

scholarly journals Thermoregulatory behaviour explains countergradient variation in the upper thermal limit of a rainforest skink

Oikos ◽  
2016 ◽  
Vol 126 (5) ◽  
pp. 748-757 ◽  
Author(s):  
John Llewelyn ◽  
Stewart Macdonald ◽  
Amberlee Hatcher ◽  
Craig Moritz ◽  
Ben L. Phillips
Keyword(s):  
Thermal Limit ◽  
Countergradient Variation ◽  
Thermoregulatory Behaviour ◽  
Upper Thermal Limit

Evolutionary Adaptation to Temperature. IV. Adaptation of Escherichia coli at a Niche Boundary

Evolution ◽  
1996 ◽  
Vol 50 (1) ◽  
pp. 35 ◽  
Author(s):  
Judith A. Mongold ◽  
Albert F. Bennett ◽  
Richard E. Lenski
Keyword(s):  
Escherichia Coli ◽  
Evolutionary Adaptation
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