Increases and decreases in marine disease reports in an era of global change

Tracy, Allison M., Pielmeier, Madeline L., Yoshioka, Reyn M., Heron, Scott F., and Harvell, C. Drew (2019) Increases and decreases in marine disease reports in an era of global change. Proceedings of the Royal Society of London Series B, Biological Sciences, 286 (1912). 20191718.

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Outbreaks of marine infectious diseases have caused widespread mass mortalities, but the lack of baseline data has precluded evaluating whether disease is increasing or decreasing in the ocean. We use an established literature proxy method from Ward and Lafferty (Ward and Lafferty 2004 PLoS Biology2, e120 (doi:10.1371/journal.pbio.0020120)) to analyse a 44-year global record of normalized disease reports from 1970 to 2013. Major marine hosts are combined into nine taxonomic groups, from seagrasses to marine mammals, to assess disease swings, defined as positive or negative multi-decadal shifts in disease reports across related hosts. Normalized disease reports increased significantly between 1970 and 2013 in corals and urchins, indicating positive disease swings in these environmentally sensitive ectotherms. Coral disease reports in the Caribbean correlated with increasing temperature anomalies, supporting the hypothesis that warming oceans drive infectious coral diseases. Meanwhile, disease risk may also decrease in a changing ocean. Disease reports decreased significantly in fishes and elasmobranchs, which have experienced steep human-induced population declines and diminishing population density that, while concerning, may reduce disease. The increases and decreases in disease reports across the 44-year record transcend short-term fluctuations and regional variation. Our results show that long-term changes in disease reports coincide with recent decades of widespread environmental change in the ocean.

Item ID: 60889
Item Type: Article (Research - C1)
ISSN: 1471-2954
Keywords: infectious disease, marine, literature proxy, temperature anomalies
Copyright Information: © 2019 The Author(s) Published by the Royal Society. All rights reserved.
Funders: National Science Foundation (NSF), National Oceanic and Atmospheric Administration (NOAA), National Aeronautics and Space Administration (NASA)
Projects and Grants: NSF grant no. OCE-1215977, NSF Graduate Research Fellowship Program (DGE-1650441), NOAA grant no. NA14NES4320003 (Cooperative Institute for Climate and Satellites - CICS), NASA ROSES Ecological Forecasting grant no. 16-eco4cast-0032
Date Deposited: 06 Nov 2019 08:07
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310305 Marine and estuarine ecology (incl. marine ichthyology) @ 100%
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