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Alternate patterns of temperature variation bring about very different disease outcomes at different mean temperatures

The dynamics of host-parasite interactions are highly temperature-dependent and may be modified by increasing frequency and intensity of climate-driven heat events. Here, we show that altered patterns of temperature variance lead to an almost order-of-magnitude shift in thermal performance of host a...

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Autores principales: Kunze, Charlotte, Luijckx, Pepijn, Jackson, Andrew L, Donohue, Ian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: eLife Sciences Publications, Ltd 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8846586/
https://www.ncbi.nlm.nih.gov/pubmed/35164901
http://dx.doi.org/10.7554/eLife.72861
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author Kunze, Charlotte
Luijckx, Pepijn
Jackson, Andrew L
Donohue, Ian
author_facet Kunze, Charlotte
Luijckx, Pepijn
Jackson, Andrew L
Donohue, Ian
author_sort Kunze, Charlotte
collection PubMed
description The dynamics of host-parasite interactions are highly temperature-dependent and may be modified by increasing frequency and intensity of climate-driven heat events. Here, we show that altered patterns of temperature variance lead to an almost order-of-magnitude shift in thermal performance of host and pathogen life-history traits over and above the effects of mean temperature and, moreover, that different temperature regimes affect these traits differently. We found that diurnal fluctuations of ±3°C lowered infection rates and reduced spore burden compared to constant temperatures in our focal host Daphnia magna exposed to the microsporidium parasite Ordospora colligata. In contrast, a 3-day heatwave (+6°C) did not affect infection rates, but increased spore burden (relative to constant temperatures with the same mean) at 16°C, while reducing burden at higher temperatures. We conclude that changing patterns of climate variation, superimposed on shifts in mean temperatures due to global warming, may have profound and unanticipated effects on disease dynamics.
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spelling pubmed-88465862022-02-16 Alternate patterns of temperature variation bring about very different disease outcomes at different mean temperatures Kunze, Charlotte Luijckx, Pepijn Jackson, Andrew L Donohue, Ian eLife Ecology The dynamics of host-parasite interactions are highly temperature-dependent and may be modified by increasing frequency and intensity of climate-driven heat events. Here, we show that altered patterns of temperature variance lead to an almost order-of-magnitude shift in thermal performance of host and pathogen life-history traits over and above the effects of mean temperature and, moreover, that different temperature regimes affect these traits differently. We found that diurnal fluctuations of ±3°C lowered infection rates and reduced spore burden compared to constant temperatures in our focal host Daphnia magna exposed to the microsporidium parasite Ordospora colligata. In contrast, a 3-day heatwave (+6°C) did not affect infection rates, but increased spore burden (relative to constant temperatures with the same mean) at 16°C, while reducing burden at higher temperatures. We conclude that changing patterns of climate variation, superimposed on shifts in mean temperatures due to global warming, may have profound and unanticipated effects on disease dynamics. eLife Sciences Publications, Ltd 2022-02-15 /pmc/articles/PMC8846586/ /pubmed/35164901 http://dx.doi.org/10.7554/eLife.72861 Text en © 2022, Kunze et al https://creativecommons.org/licenses/by/4.0/This article is distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited.
spellingShingle Ecology
Kunze, Charlotte
Luijckx, Pepijn
Jackson, Andrew L
Donohue, Ian
Alternate patterns of temperature variation bring about very different disease outcomes at different mean temperatures
title Alternate patterns of temperature variation bring about very different disease outcomes at different mean temperatures
title_full Alternate patterns of temperature variation bring about very different disease outcomes at different mean temperatures
title_fullStr Alternate patterns of temperature variation bring about very different disease outcomes at different mean temperatures
title_full_unstemmed Alternate patterns of temperature variation bring about very different disease outcomes at different mean temperatures
title_short Alternate patterns of temperature variation bring about very different disease outcomes at different mean temperatures
title_sort alternate patterns of temperature variation bring about very different disease outcomes at different mean temperatures
topic Ecology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8846586/
https://www.ncbi.nlm.nih.gov/pubmed/35164901
http://dx.doi.org/10.7554/eLife.72861
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