Abstract
The disease ecology community has struggled to come to consensus on whether biodiversity reduces or increases infectious disease risk, a question that directly affects policy decisions for biodiversity conservation and public health. Here, we summarize the primary points of contention regarding biodiversity–disease relationships and suggest that vector-borne, generalist wildlife and zoonotic pathogens are the types of parasites most likely to be affected by changes to biodiversity. One synthesis on this topic revealed a positive correlation between biodiversity and human disease burden across countries, but as biodiversity changed over time within these countries, this correlation became weaker and more variable. Another synthesis—a meta-analysis of generally smaller-scale experimental and field studies—revealed a negative correlation between biodiversity and infectious diseases (a dilution effect) in various host taxa. These results raise the question of whether biodiversity–disease relationships are more negative at smaller spatial scales. If so, biodiversity conservation at the appropriate scales might prevent wildlife and zoonotic diseases from increasing in prevalence or becoming problematic (general proactive approaches). Further, protecting natural areas from human incursion should reduce zoonotic disease spillover. By contrast, for some infectious diseases, managing particular species or habitats and targeted biomedical approaches (targeted reactive approaches) might outperform biodiversity conservation as a tool for disease control. Importantly, biodiversity conservation and management need to be considered alongside other disease management options. These suggested guiding principles should provide common ground that can enhance scientific and policy clarity for those interested in simultaneously improving wildlife and human health.
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Measles photo, CDC/NIP/Barbara Rice; Giardia lamblia, CDC/Janice Haney Carr; HIV image, Matthew Cole / Alamy Stock Vector; tick photo, Scott Bauer, USDA Agricultural Research Service.



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References
Cardinale, B. J. et al. Biodiversity loss and its impact on humanity. Nature 486, 59–67 (2012).
Rohr, J. R., Bernhardt, E. S., Cadotte, M. W. & Clements, W. H. The ecology and economics of restoration: when, what, where, and how to restore ecosystems. Ecol. Soc. 23, 15 (2018).
Dornelas, M. et al. Assemblage time series reveal biodiversity change but not systematic loss. Science 344, 296–299 (2014).
Elton, C. S. The Ecology of Invasions by Animals and Plants (Methuen Publishing, 1958).
Van der Plank, J. E. Plant Diseases: Epidemics and Control (Academic Press, 1963).
Randolph, S. E. & Dobson, A. D. M. Pangloss revisited: a critique of the dilution effect and the biodiversity-buffers-disease paradigm. Parasitology 139, 847–863 (2012).
Levi, T. et al. Does biodiversity protect humans against infectious disease? Comment. Ecology 97, 536–542 (2016).
Ostfeld, R. S. A Candide response to Panglossian accusations by Randolph and Dobson: biodiversity buffers disease. Parasitology 140, 1196–1198 (2013).
Ostfeld, R. S. & Keesing, F. Straw men don’t get Lyme disease: response to Wood and Lafferty. Trends Ecol. Evol. 28, 502–503 (2013).
Ostfeld, R. S. & Keesing, F. Is biodiversity bad for your health? Ecosphere 8, e01676 (2017).
Lafferty, K. D. & Wood, C. L. It’s a myth that protection against disease is a strong and general service of biodiversity conservation: response to Ostfeld and Keesing. Trends Ecol. Evol. 28, 503–504 (2013).
Wood, C. L. & Lafferty, K. D. Biodiversity and disease: a synthesis of ecological perspectives on Lyme disease transmission. Trends Ecol. Evol. 28, 239–247 (2013).
Wood, C. L. et al. Does biodiversity protect humans against infectious disease? Ecology 95, 817–832 (2014).
Wood, C. L. et al. Does biodiversity protect humans against infectious disease? Reply. Ecology 97, 542–545 (2016).
Salkeld, D. J., Padgett, K. A. & Jones, J. H. A meta‐analysis suggesting that the relationship between biodiversity and risk of zoonotic pathogen transmission is idiosyncratic. Ecol. Lett. 16, 679–686 (2013).
Salkeld, D. J., Padgett, K. A., Jones, J. H. & Antolin, M. F. Public health perspective on patterns of biodiversity and zoonotic disease. Proc. Natl Acad. Sci. USA 112, E6261 (2015).
Civitello, D. J. et al. Biodiversity inhibits parasites: broad evidence for the dilution effect. Proc. Natl Acad. Sci. USA 112, 8667–8671 (2015).
Civitello, D. J. et al. Reply to Salkeld et al.: Diversity-disease patterns are robust to study design, selection criteria, and publication bias. Proc. Natl Acad. Sci. USA 112, E6262 (2015).
Wilcox, C. The Hidden Dispute Over Biodiversity’s Health Benefits. The Atlantic (31 October 2017).
Keesing, F. et al. Impacts of biodiversity on the emergence and transmission of infectious diseases. Nature 468, 647–652 (2010).
Laurenson, M. K., Norman, R., Gilbert, L., Reid, H. W. & Hudson, P. J. Identifying disease reservoirs in complex systems: mountain hares as reservoirs of ticks and louping‐ill virus, pathogens of red grouse. J. Anim. Ecol. 72, 177–185 (2003).
Norman, R., Bowers, R., Begon, M. & Hudson, P. J. Persistence of tick-borne virus in the presence of multiple host species: tick reservoirs and parasite mediated competition. J. Theor. Biol. 200, 111–118 (1999).
Van Buskirk, J. & Ostfeld, R. S. Controlling Lyme disease by modifying the density and species composition of tick hosts. Ecol. Appl. 5, 1133–1140 (1995).
Young, H., Griffin, R. H., Wood, C. L. & Nunn, C. L. Does habitat disturbance increase infectious disease risk for primates? Ecol. Lett. 16, 656–663 (2013).
Dunn, R. R. Global mapping of ecosystem disservices: the unspoken reality that nature sometimes kills us. Biotropica 42, 555–557 (2010).
Dunn, R. R., Davies, T. J., Harris, N. C. & Gavin, M. C. Global drivers of human pathogen richness and prevalence. Proc. Royal Soc. Lond. B 277, 2587–2595 (2010).
Keesing, F., Holt, R. D. & Ostfeld, R. S. Effects of species diversity on disease risk. Ecol. Lett. 9, 485–498 (2006).
Wood, C. L., McInturff, A., Young, H. S., Kim, D. & Lafferty, K. D. Human infectious disease burdens decrease with urbanization but not with biodiversity. Philos. Trans. Royal Soc. B 372, 20160122 (2017).
Kilpatrick, A. M. Globalization, land use, and the invasion of West Nile Virus. Science 334, 323–327 (2011).
Halsey, S. Defuse the dilution effect debate. Nature Ecol. Evol. 3, 145–146 (2019).
Ostfeld, R. S. & Keesing, F. Effects of host diversity on infectious disease. Annu. Rev. Ecol. Evol. Syst. 43, 157–182 (2012).
Laurenson, M. K., Norman, R., Gilbert, L., Reid, H. W. & Hudson, P. J. Mountain hares, louping-ill, red grouse and harvesting: complex interactions but few data. J. Anim. Ecol. 73, 811–813 (2004).
Donnelly, C. A. et al. Positive and negative effects of widespread badger culling on tuberculosis in cattle. Nature 439, 843–846 (2006).
Johnson, P. T. J., Ostfeld, R. S. & Keesing, F. Frontiers in research on biodiversity and disease. Ecol. Lett. 18, 1119–1133 (2015).
Kilpatrick, A. M., Salkeld, D. J., Titcomb, G. & Hahn, M. B. Conservation of biodiversity as a strategy for improving human health and well-being. Philos. Trans. Royal Soc. B 372, 20160131 (2017).
Lloyd-Smith, J. O. et al. Epidemic dynamics at the human-animal interface. Science 326, 1362–1367 (2009).
Plowright, R. K. et al. Pathways to zoonotic spillover. Nat. Rev. Microbiol. 15, 502–510 (2017).
Taylor, L. H., Latham, S. M. & Woolhouse, M. E. J. Risk factors for human disease emergence. Philos. Trans. Royal Soc. Lond. B 356, 983–989 (2001).
das Chagas Xavier, S. C. et al. Lower richness of small wild mammal species and Chagas disease risk. PLOS Neglect. Trop. Dis. 6, e1647 (2012).
Gottdenker, N. L., Chaves, L. F., Calzada, J. E., Saldaña, A. & Carroll, C. R. Host life history strategy, species diversity, and habitat influence Trypanosoma cruzi vector infection in changing landscapes. PLoS Neglect. Trop. Dis. 6, e1884 (2012).
Derne, B. T., Fearnley, E. J., Lau, C. L., Paynter, S. & Weinstein, P. Biodiversity and leptospirosis risk: a case of pathogen regulation? Med. Hypotheses 77, 339–344 (2011).
Dizney, L. J. & Ruedas, L. A. Increased host species diversity and decreased prevalence of Sin Nombre virus. Emerg. Infect. Dis. 15, 1012–1018 (2009).
Suzán, G. et al. Experimental evidence for reduced rodent diversity causing increased hantavirus prevalence. PLoS ONE 4, e5461 (2009).
Luis, A. D., Kuenzi, A. J. & Mills, J. N. Species diversity concurrently dilutes and amplifies transmission in a zoonotic host–pathogen system through competing mechanisms. Proc. Natl Acad. Sci. USA 115, 7979–7984 (2018).
Ostfeld, R. S. & Keesing, F. Biodiversity and disease risk: the case of lyme disease. Conserv. Biol. 14, 722–728 (2000).
Herrera, D. et al. Upstream watershed condition predicts rural children’s health across 35 developing countries. Nat. Commun. 8, 811 (2017).
Knutie, S. A., Wilkinson, C. L., Kohl, K. D. & Rohr, J. R. Early-life disruption of host microbiota decreases later-life resistance to infections. Nat. Commun. 8, 86 (2017).
Cohen, J. M. et al. Spatial scale modulates the strength of ecological processes driving disease distributions. Proc. Natl Acad. Sci. USA 113, E3359–E3364 (2016).
Strauss, A. T., Civitello, D. J., Cáceres, C. E. & Hall, S. R. Success, failure and ambiguity of the dilution effect among competitors. Ecol. Lett. 18, 916–926 (2015).
Ostfeld, R. S. & Keesing, F. Biodiversity series: the function of biodiversity in the ecology of vector-borne zoonotic diseases. Can. J. Zool. 78, 2061–2078 (2000).
Ostfeld, R. S., Thomas, M. B. & Keesing, F. in Biodiversity, Ecosystem Functioning, and Human Well-Being: An Ecological and Economic Perspective (eds Naeem, S. et al.) 209–216 (Oxford Univ. Press, 2009).
Schmidt, K. A. & Ostfeld, R. S. Biodiversity and the dilution effect in disease ecology. Ecology 82, 609–619 (2001).
Linske, M. A., Williams, S. C., Stafford, K. C. & Ortega, I. M. Ixodes scapularis (Acari: Ixodidae) reservoir host diversity and abundance impacts on dilution of Borrelia burgdorferi (Spirochaetales: Spirochaetaceae) in residential and woodland habitats in Connecticut, United States. J. Med. Entomol. 55, 681–690 (2018).
Frainer, A., McKie, B. G., Amundsen, P.-A., Knudsen, R. & Lafferty, K. D. Parasitism and the biodiversity-functioning relationship. Trends Ecol. Evol. 33, 260–268 (2018).
LoGiudice, K., Ostfeld, R. S., Schmidt, K. A. & Keesing, F. The ecology of infectious disease: effects of host diversity and community composition on Lyme disease risk. Proc. Natl Acad. Sci. USA 100, 567–571 (2003).
Levi, T., Keesing, F., Holt, R. D., Barfield, M. & Ostfeld, R. S. Quantifying dilution and amplification in a community of hosts for tick-borne pathogens. Ecol. Appl. 26, 484–498 (2016).
Johnson, P. T. J., Preston, D. L., Hoverman, J. T. & Richgels, K. L. D. Biodiversity decreases disease through predictable changes in host community competence. Nature 494, 230–233 (2013).
Rohr, J. R. et al. Predator diversity, intraguild predation, and indirect effects drive parasite transmission. Proc. Natl Acad. Sci. USA 112, 3008–3013 (2015).
Venesky, M. D., Liu, X., Sauer, E. L. & Rohr, J. R. Linking manipulative experiments to field data to test the dilution effect. J. Anim. Ecol. 83, 557–565 (2014).
Mitchell, C. E., Tilman, D. & Groth, J. V. Effects of grassland plant species diversity, abundance, and composition on foliar fungal disease. Ecology 83, 1713–1726 (2002).
Young, H. S. et al. Conservation, biodiversity and infectious disease: scientific evidence and policy implications. Philos. Trans. Royal Soc. B 372, 20160124 (2017).
Hosseini, P. R. et al. Does the impact of biodiversity differ between emerging and endemic pathogens? The need to separate the concepts of hazard and risk. Philos. Trans. R. Soc. B-Biol. Sci. 372, 20160129 (2017).
Clay, K. et al. in Infectious Disease Ecology: Effects of Ecosystems on Disease and of Disease on Ecosystems (eds Ostfeld, R. S., Keesing, F. & Eviner, V. T.) 145–178 (Princeton Univ. Press, 2008).
Parker, I. M. et al. Phylogenetic structure and host abundance drive disease pressure in communities. Nature 520, 542–544 (2015).
Lively, C. M. The effect of host genetic diversity on disease spread. Am. Nat. 175, E149–E152 (2010).
Han, B. A., Schmidt, J. P., Bowden, S. E. & Drake, J. M. Rodent reservoirs of future zoonotic diseases. Proc. Natl Acad. Sci. USA 112, 7039–7044 (2015).
Luis, A. D. et al. A comparison of bats and rodents as reservoirs of zoonotic viruses: are bats special? Proc. Royal Soc. B 280, 20122753 (2013).
Sears, B. F., Snyder, P. W. & Rohr, J. R. Host life history and host-parasite syntopy predict behavioural resistance and tolerance of parasites. J. Anim. Ecol. 84, 625–636 (2015).
Johnson, P. T. J. et al. Living fast and dying of infection: host life history drives interspecific variation in infection and disease risk. Ecol. Lett. 15, 235–242 (2012).
Previtali, M. A. et al. Relationship between pace of life and immune responses in wild rodents. Oikos 121, 1483–1492 (2012).
Lively, C. M. & Dybdahl, M. F. Parasite adaptation to locally common host genotypes. Nature 405, 679–681 (2000).
Lloyd-Smith, J. O., Schreiber, S. J., Kopp, P. E. & Getz, W. M. Superspreading and the effect of individual variation on disease emergence. Nature 438, 355–359 (2005).
Buck, J. C. & Perkins, S. E. Study scale determines whether wildlife loss protects against or promotes tick-borne disease. Proc. Royal Soc. Lond. B 285, 20180218 (2018).
Ostfeld, R. S. & LoGiudice, K. Community disassembly, biodiversity loss, and the erosion of an ecosystem service. Ecology 84, 1421–1427 (2003).
Keesing, F. & Ostfeld, R. S. Is biodiversity good for your health? Science 349, 235–236 (2015).
Mihaljevic, J. R., Joseph, M. B., Orlofske, S. A. & Paull, S. H. The scaling of host density with richness affects the direction, shape, and detectability of diversity-disease relationships. PLoS ONE 9, e97812 (2014).
Halliday, F. W., Heckman, R. W., Wilfahrt, P. A. & Mitchell, C. E. A multivariate test of disease risk reveals conditions leading to disease amplification Proc. Royal Soc. B. 284, 20171340 (The Royal Society).
Johnson, P. T. J. & Hoverman, J. T. Parasite diversity and coinfection determine pathogen infection success and host fitness. Proc. Natl Acad. Sci. USA 109, 9006–9011 (2012).
Joseph, M. B., Mihaljevic, J. R., Orlofske, S. A. & Paull, S. H. Does life history mediate changing disease risk when communities disassemble? Ecol. Lett. 16, 1405–1412 (2013).
Liu, X., Chen, F., Lyu, S., Sun, D. & Zhou, S. Random species loss underestimates dilution effects of host diversity on foliar fungal diseases under fertilization. Ecol. Evol. 8, 1705–1713 (2018).
Hechinger, R. F. & Lafferty, K. D. Host diversity begets parasite diversity: bird final hosts and trematodes in snail intermediate hosts. Proc. Royal Soc. Lond. B 272, 1059–1066 (2005).
Johnson, P. T. J. et al. Habitat heterogeneity drives the host-diversity-begets-parasite-diversity relationship: evidence from experimental and field studies. Ecol. Lett. 19, 752–761 (2016).
Kamiya, T., O’Dwyer, K., Nakagawa, S. & Poulin, R. Host diversity drives parasite diversity: meta‐analytical insights into patterns and causal mechanisms. Ecography 37, 689–697 (2014).
Wood, C. L. & Johnson, P. T. How does space influence the relationship between host and parasite diversity? J. Parasitol. 102, 485–494 (2016).
Rottstock, T., Joshi, J., Kummer, V. & Fischer, M. Higher plant diversity promotes higher diversity of fungal pathogens, while it decreases pathogen infection per plant. Ecology 95, 1907–1917 (2014).
Guernier, V., Hochberg, M. E. & Guegan, J. F. O. Ecology drives the worldwide distribution of human diseases. PLoS Biol. 2, 740–746 (2004).
Huang, Z., Van Langevelde, F., Estrada-Peña, A., Suzán, G. & De Boer, W. The diversity–disease relationship: evidence for and criticisms of the dilution effect. Parasitology 143, 1075–1086 (2016).
Halliday, F. W. & Rohr, J. R. Measuring the shape of the biodiversity-disease relationship across systems reveals new findings and key gaps. Nat. Commun. 10, 5032 (2019).
Myers, S. S. et al. Human health impacts of ecosystem alteration. Proc. Natl Acad. Sci. USA 110, 18753–18760 (2013).
Strona, G. & Lafferty, K. D. Environmental change makes robust ecological networks fragile. Nat. Commun. 7, 12462 (2016).
Chase, J. M. & Knight, T. M. Scale‐dependent effect sizes of ecological drivers on biodiversity: why standardised sampling is not enough. Ecol. Lett. 16, 17–26 (2013).
Becker, C. G. et al. Partitioning the net effect of host diversity on an emerging amphibian pathogen. Proc. Royal Soc. Lond. B 281, 20141796 (2014).
Barbosa, P. et al. Associational resistance and associational susceptibility: having right or wrong neighbors. Annu. Rev. Ecol. Evol. Syst. 40, 1–20 (2009).
Chase, J. M. et al. Embracing scale‐dependence to achieve a deeper understanding of biodiversity and its change across communities. Ecol. Lett. 21, 1737–1751 (2018).
Halliday, F. W., Heckman, R. W., Wilfart, P. A. & Mitchell, C. E. Past is prologue: host community assembly and the risk of infectious disease over time. Ecol. Lett. 22, 138–148 (2019).
Acknowledgements
We are thankful to J. Cohen, A. Dobson, R. Holt, P. T. J. Johnson, A. M. Kilpatrick, T. Levi, C. Lively and M. Venesky for insightful discussions on biodiversity–disease relationships over the years, and J. Mihaljevic for constructive comments on this manuscript. We also cannot thank R. Ostfeld and F. Keesing enough for >1.5 years of invaluable input on this manuscript as invited co-authors and their contributions to the biodiversity–disease discipline in general. All co-authors were encouraged to document any points of disagreement or compromise in an Appendix to this paper and passed on that opportunity. This research was supported by grants from the National Science Foundation (EF-1241889), National Institutes of Health (R01GM109499, R01TW010286), US Department of Agriculture (NRI 2006-01370, 2009-35102-0543), and US Environmental Protection Agency (CAREER 83518801) to J.R.R., by a grant from the National Science Foundation (OCE-1829509), an Alfred P. Sloan Foundation Sloan Research Fellowship, a University of Washington Innovation Award, and a University of Washington Royalty Research Fund award to C.L.W., and by grants from the National Science Foundation (DEB-1518681), the Stanford University Woods Institute for the Environment, and the Hellman Faculty Scholars fund to E.A.M. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the US Government.
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Rohr, J.R., Civitello, D.J., Halliday, F.W. et al. Towards common ground in the biodiversity–disease debate. Nat Ecol Evol 4, 24–33 (2020). https://doi.org/10.1038/s41559-019-1060-6
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