Resource quantity affects infection success and impacts of a microsporidian on hosts

Resource quantity affects infection success and impacts of a microsporidian on hosts | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL Oikos This is a preprint and has not been peer reviewed. Data may be preliminary. 3 February 2025 V1 Latest version Share on Resource quantity affects infection success and impacts of a microsporidian on hosts Authors : Elizabeth Davenport 0000-0002-2139-6820 [email protected] , Marcin Dziuba , Fiona Corcoran , Natalia Ferreira dos Santos , Kira Monell , Paige McCreadie , Siobhan Calhoun , Taleah Nelson , Logan Jacobson , Riley Manuel , and Meghan Duffy 0000-0002-8142-0802 Authors Info & Affiliations https://doi.org/10.22541/au.173858053.37915414/v1 Published Oikos Version of record Peer review timeline 354 views 214 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Resource quantity in the environment often changes over time and influences the nutritional status of hosts that may encounter parasites. If resource availability significantly alters both infection success and within-host growth of a parasite, fluctuations in resources may underlie the seasonal disease outbreaks that have been observed for some parasites. Moreover, resource quantity may affect how a parasite impacts host survivorship and traits, including feeding rate and assimilation of nutrients. Some parasites, such as intracellular microsporidia with highly reduced genomes, may be particularly sensitive to variation in host nutritional status and more likely to have resource-dependent impacts. To determine how resource quantity affects infection success and parasite impacts on hosts, we conducted laboratory experiments using the microsporidian parasite Ordospora pajunii and its zooplankton host, the dominant grazer Daphnia dentifera. We found that infection probability and spore burden were higher when resources were more abundant, suggesting O. pajunii benefits when host quality is higher. However, parasite virulence, which was measured in terms of host mortality, was greater when resources were more limited. Parasite exposure depressed host feeding rate, but the timing of this reduction differed across the resource gradient. Further investigation of host carbon assimilation efficiency and dissolved organic carbon release during infections when resources were more limited revealed no significant impact of infection. Overall, resource-dependent impacts of O. pajunii on hosts, including reduced host feeding rate and increased host mortality, may contribute to seasonal disease outbreaks and drive trophic cascades in lakes. Supplementary Material File (oik-11412-file002.pdf) Download 586.86 KB Information & Authors Information Version history V1 Version 1 03 February 2025 Peer review timeline Published Oikos Version of Record 26 Sep 2025 Published Copyright This work is licensed under a Non Exclusive No Reuse License. Collection Oikos Keywords assimilation efficiency daphnia feeding rate ordospora pathogen resources Authors Affiliations Elizabeth Davenport 0000-0002-2139-6820 [email protected] University of Michigan View all articles by this author Marcin Dziuba University of Michigan View all articles by this author Fiona Corcoran University of Michigan View all articles by this author Natalia Ferreira dos Santos University of Michigan View all articles by this author Kira Monell University of Michigan View all articles by this author Paige McCreadie University of Michigan View all articles by this author Siobhan Calhoun University of Michigan View all articles by this author Taleah Nelson University of Michigan View all articles by this author Logan Jacobson University of Michigan View all articles by this author Riley Manuel University of Michigan View all articles by this author Meghan Duffy 0000-0002-8142-0802 University of Michigan College of Literature Science and the Arts View all articles by this author Metrics & Citations Metrics Article Usage 354 views 214 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Elizabeth Davenport, Marcin Dziuba, Fiona Corcoran, et al. Resource quantity affects infection success and impacts of a microsporidian on hosts. Authorea . 03 February 2025. DOI: https://doi.org/10.22541/au.173858053.37915414/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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