NDLI: Roles of adaptation, chance and history in the evolution of the dinoflagellate Prorocentrum triestinum

Content Provider	Springer Nature Link
Author	Flores Moya, Antonio Costas, Eduardo López Rodas, Victoria
Copyright Year	2008
Abstract	Evolutionary changes depend on adaptive evolution and two other components that traditionally have not been taken into account: chance and history. However, concepts in evolutionary biology are very often supported by descriptive studies but not by empirical approach. In order to disentangle the three components of evolutionary change, we have investigated the effects of long-term selection pressure on fitness and cell size in the bloom-forming dinoflagellate, Prorocentrum triestinum Schiller, under increased nutrient concentrations and temperature. Two strains of P. triestinum, previously adapted to grow under standard conditions (f/2 medium, 20°C), were grown under increased nutrient concentrations and temperature (f medium, 25°C) until fitness and cell size were invariant as a function of time (720 days, corresponding to c. 400 generations). The mean value for fitness of both strains of P. triestinum showed a significant increase whereas a decrease in mean cell size was found. The changes in fitness have adaptive value, but the changes in cell size were due to both adaptation and the contribution of chance-plus-history.
Starting Page	697
Ending Page	703
Page Count	7
File Format	PDF
ISSN	00281042
Journal	Naturwissenschaften
Volume Number	95
Issue Number	8
e-ISSN	14321904
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-03-19
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Adaptation Chance History Nutrients Prorocentrum Temperature Environment Life Sciences
Content Type	Text
Resource Type	Article
Subject	Medicine Ecology, Evolution, Behavior and Systematics

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