Prior heat accumulation reduces survival during subsequent experimental heat waves

Prior heat accumulation reduces survival during subsequent experimental heat waves Heat waves, i.e., periods of extremely hot weather, are expected to increase in frequency and duration under climate change. Repeated exposure to thermal stress events such as heat waves can affect population dynamics and even population persistence. Understanding whether recent thermal history bolsters or hinders demographic responses such as survival or growth during heat waves is crucial for predicting population persistence in the face of climate change. We tested for differential mortality following an experimental heat wave in populations of the splash pool copepod, Tigriopus californicus, inhabiting pools that differ in their recent thermal history. We observed differences in survivorship that were correlated with differences in thermal history. Among multiple metrics of thermal history, daily degree-hours (a measure of heat accumulation) best explained heat wave survival such that a higher number of degree-hours resulted in reduced heat wave survival. This finding is consistent with the hypothesis that repeated exposure to sublethal temperatures reduces thermal tolerance. Increasing heat wave intensity and duration, or warmer conditions that increase heat accumulation followed by heat waves may negatively impact population persistence by exacerbating the demographic effects of heat waves. The results of this study emphasize the need to integrate mechanistic physiology within the realm of population ecology to bolster the ability to predict population-level responses to climate change. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Experimental Marine Biology and Ecology Elsevier

Prior heat accumulation reduces survival during subsequent experimental heat waves

Loading next page...
 
/lp/elsevier/prior-heat-accumulation-reduces-survival-during-subsequent-drp50oKKyZ
Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier B.V.
ISSN
0022-0981
eISSN
1879-1697
D.O.I.
10.1016/j.jembe.2018.01.012
Publisher site
See Article on Publisher Site

Abstract

Heat waves, i.e., periods of extremely hot weather, are expected to increase in frequency and duration under climate change. Repeated exposure to thermal stress events such as heat waves can affect population dynamics and even population persistence. Understanding whether recent thermal history bolsters or hinders demographic responses such as survival or growth during heat waves is crucial for predicting population persistence in the face of climate change. We tested for differential mortality following an experimental heat wave in populations of the splash pool copepod, Tigriopus californicus, inhabiting pools that differ in their recent thermal history. We observed differences in survivorship that were correlated with differences in thermal history. Among multiple metrics of thermal history, daily degree-hours (a measure of heat accumulation) best explained heat wave survival such that a higher number of degree-hours resulted in reduced heat wave survival. This finding is consistent with the hypothesis that repeated exposure to sublethal temperatures reduces thermal tolerance. Increasing heat wave intensity and duration, or warmer conditions that increase heat accumulation followed by heat waves may negatively impact population persistence by exacerbating the demographic effects of heat waves. The results of this study emphasize the need to integrate mechanistic physiology within the realm of population ecology to bolster the ability to predict population-level responses to climate change.

Journal

Journal of Experimental Marine Biology and EcologyElsevier

Published: Apr 1, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from
Google Scholar,
PubMed
Create lists to
organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off