TY - JOUR
T1 - Warming and temperature variability determine the performance of two invertebrate predators
AU - Morón Lugo, Sonia C.
AU - Baumeister, Moritz
AU - Nour, Ola Mohamed
AU - Wolf, Fabian
AU - Stumpp, Meike
AU - Pansch, Christian
N1 - Funding Information:
We thank Ute Hecht, Frauke Nevoigt and Karl Bumke from GEOMAR weather station for providing the temperature data (GEOMAR, Ocean Circulation and Climate Dynamics - Marine Meteorology; http://www. geomar.de/en/service/weather). Data were processed by Rainer Kiko, GEOMAR. We would also like to thank Sarah Rühmkorf for help in maintenance during the experiment and Francisco R. Barboza for statistical advice. This work was funded through the German Research Foundation (DFG) project: The neglected role of environmental fluctuations as modulator of stress and driver of rapid evolution (Grant Number: PA 2643/2/348431475) and through GEOMAR. The project was supported by the Cluster of Excellence “The Future Ocean”, funded within the framework of the Excellence Initiative by the Deutsche Forschungsgemeinschaft (DFG) on behalf of the German federal and state governments. CP was funded by the postdoc program of the Helmholtz-Gemeinschaft Deutscher Forschungszentren and by GEOMAR.
Publisher Copyright:
© 2020, The Author(s).
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/12/1
Y1 - 2020/12/1
N2 - In a warming ocean, temperature variability imposes intensified peak stress, but offers periods of stress release. While field observations on organismic responses to heatwaves are emerging, experimental evidence is rare and almost lacking for shorter-scale environmental variability. For two major invertebrate predators, we simulated sinusoidal temperature variability (±3 °C) around todays’ warm summer temperatures and around a future warming scenario (+4 °C) over two months, based on high-resolution 15-year temperature data that allowed implementation of realistic seasonal temperature shifts peaking midpoint. Warming decreased sea stars’ (Asterias rubens) energy uptake (Mytilus edulis consumption) and overall growth. Variability around the warming scenario imposed additional stress onto Asterias leading to an earlier collapse in feeding under sinusoidal fluctuations. High-peak temperatures prevented feeding, which was not compensated during phases of stress release (low-temperature peaks). In contrast, increased temperatures increased feeding on Mytilus but not growth rates of the recent invader Hemigrapsus takanoi, irrespective of the scale at which temperature variability was imposed. This study highlights species-specific impacts of warming and identifies temperature variability at the scale of days to weeks/months as important driver of thermal responses. When species’ thermal limits are exceeded, temperature variability represents an additional source of stress as seen from future warming scenarios.
AB - In a warming ocean, temperature variability imposes intensified peak stress, but offers periods of stress release. While field observations on organismic responses to heatwaves are emerging, experimental evidence is rare and almost lacking for shorter-scale environmental variability. For two major invertebrate predators, we simulated sinusoidal temperature variability (±3 °C) around todays’ warm summer temperatures and around a future warming scenario (+4 °C) over two months, based on high-resolution 15-year temperature data that allowed implementation of realistic seasonal temperature shifts peaking midpoint. Warming decreased sea stars’ (Asterias rubens) energy uptake (Mytilus edulis consumption) and overall growth. Variability around the warming scenario imposed additional stress onto Asterias leading to an earlier collapse in feeding under sinusoidal fluctuations. High-peak temperatures prevented feeding, which was not compensated during phases of stress release (low-temperature peaks). In contrast, increased temperatures increased feeding on Mytilus but not growth rates of the recent invader Hemigrapsus takanoi, irrespective of the scale at which temperature variability was imposed. This study highlights species-specific impacts of warming and identifies temperature variability at the scale of days to weeks/months as important driver of thermal responses. When species’ thermal limits are exceeded, temperature variability represents an additional source of stress as seen from future warming scenarios.
UR - http://www.scopus.com/inward/record.url?scp=85083773537&partnerID=8YFLogxK
U2 - 10.1038/s41598-020-63679-0
DO - 10.1038/s41598-020-63679-0
M3 - Article
C2 - 32321937
AN - SCOPUS:85083773537
SN - 2045-2322
VL - 10
JO - Scientific Reports
JF - Scientific Reports
IS - 1
M1 - 6780
ER -