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The scaling of host density with richness affects the direction, shape, and detectability of diversity-disease relationships.

ABSTRACT: Pathogen transmission responds differently to host richness and abundance, two unique components of host diversity. However, the heated debate around whether biodiversity generally increases or decreases disease has not considered the relationships between host richness and abundance that may exist in natural systems. Here we use a multi-species model to study how the scaling of total host community abundance with species richness mediates diversity-disease relationships. For pathogens with density-dependent transmission, non-monotonic trends emerge between pathogen transmission and host richness when host community abundance saturates with richness. Further, host species identity drives high variability in pathogen transmission in depauperate communities, but this effect diminishes as host richness accumulates. Using simulation we show that high variability in low richness communities and the non-monotonic relationship observed with host community saturation may reduce the detectability of trends in empirical data. Our study emphasizes that understanding the patterns and predictability of host community composition and pathogen transmission mode will be crucial for predicting where and when specific diversity-disease relationships should occur in natural systems.

SUBMITTER: Mihaljevic JR

PROVIDER: S-EPMC4029764 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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The scaling of host density with richness affects the direction, shape, and detectability of diversity-disease relationships.

Mihaljevic Joseph R JR Joseph Maxwell B MB Orlofske Sarah A SA Paull Sara H SH

PloS one 20140521 5

Pathogen transmission responds differently to host richness and abundance, two unique components of host diversity. However, the heated debate around whether biodiversity generally increases or decreases disease has not considered the relationships between host richness and abundance that may exist in natural systems. Here we use a multi-species model to study how the scaling of total host community abundance with species richness mediates diversity-disease relationships. For pathogens with dens ...[more]

PMID: 24849581

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Dataset Information

The scaling of host density with richness affects the direction, shape, and detectability of diversity-disease relationships.

Publications

The scaling of host density with richness affects the direction, shape, and detectability of diversity-disease relationships.

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