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Temporal escape-adaptation to eutrophication by Skeletonema marinoi

Olofsson, Malin and Almen, Anna-Karin and Jaatinen, Kim and Scheinin, Matias (2022). Temporal escape-adaptation to eutrophication by Skeletonema marinoi. FEMS Microbiology Letters. 369 :1
[Research article]

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Diatoms commonly set off the spring-bloom in temperate coastal environments. However, their temporal offset may change in regions subject to nutrient enrichment, and by peaking earlier, such populations can maintain their position in the vernal plankton succession. We tested whether the marine keystone diatom Skeletonema marinoi can accomplish this through thermal evolutionary adaptation. Eight geographically separated subpopulations, representing hydromorphologically and climatologically similar inlets displaying a range of trophic states, were compared in a common-garden experiment. At early-spring temperatures, both doubling times and variation coefficients thereof, correlated negatively with the trophic state of the environment of origin, indicating selection for fast growth due to eutrophication. At mid-spring temperatures, the relationships were reversed, indicating selection in the opposite direction. At late-spring temperatures, no significant relationships were detected, suggesting relaxed selection. Subsequent field observations reflected these findings, where blooming temperatures decreased with trophic state. Natural selection thus moves along with eutrophication towards colder temperatures earlier in the spring, favouring genotypes with the capacity to grow fast. The thermal niche shift demonstrated herein may be an evolutionary mechanism essentially leading to trophic changes in the local ecosystem.

Authors/Creators:Olofsson, Malin and Almen, Anna-Karin and Jaatinen, Kim and Scheinin, Matias
Title:Temporal escape-adaptation to eutrophication by Skeletonema marinoi
Series Name/Journal:FEMS Microbiology Letters
Year of publishing :2022
Number of Pages:7
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Microbiology (Microbiology in the medical area to be 30109)
Keywords:Baltic Sea, resting stages, elevated temperatures, climate change, diatoms, eutrophication
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Additional ID:
Type of IDID
Web of Science (WoS)000776762400002
ID Code:27634
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:26 Apr 2022 12:25
Metadata Last Modified:26 Apr 2022 12:31

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