Effect of Biodiversity Changes in Disease Risk: Exploring Disease Emergence in a Plant-Virus System

Pagán Muñoz, Jesús Israel and González Jara, Pedro and Moreno Letelier, Alejandra and Rodelo Urrego, Manuel Alfredo and Fraile Pérez, Aurora and Piñero, Daniel and Garcia-Arenal Rodriguez, Fernando (2012). Effect of Biodiversity Changes in Disease Risk: Exploring Disease Emergence in a Plant-Virus System. "Plos Pathogens" (n. 8); pp.. ISSN 1553-7366. https://doi.org/10.1371/journal.ppat.1002796.

Description

Title: Effect of Biodiversity Changes in Disease Risk: Exploring Disease Emergence in a Plant-Virus System
Author/s:
  • Pagán Muñoz, Jesús Israel
  • González Jara, Pedro
  • Moreno Letelier, Alejandra
  • Rodelo Urrego, Manuel Alfredo
  • Fraile Pérez, Aurora
  • Piñero, Daniel
  • Garcia-Arenal Rodriguez, Fernando
Item Type: Article
Título de Revista/Publicación: Plos Pathogens
Date: July 2012
ISSN: 1553-7366
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Biotecnologia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The effect of biodiversity on the ability of parasites to infect their host and cause disease (i.e. disease risk) is a major question in pathology, which is central to understand the emergence of infectious diseases, and to develop strategies for their management. Two hypotheses, which can be considered as extremes of a continuum, relate biodiversity to disease risk: One states that biodiversity is positively correlated with disease risk (Amplification Effect), and the second predicts a negative correlation between biodiversity and disease risk (Dilution Effect). Which of them applies better to different host-parasite systems is still a source of debate, due to limited experimental or empirical data. This is especially the case for viral diseases of plants. To address this subject, we have monitored for three years the prevalence of several viruses, and virus-associated symptoms, in populations of wild pepper (chiltepin) under different levels of human management. For each population, we also measured the habitat species diversity, host plant genetic diversity and host plant density. Results indicate that disease and infection risk increased with the level of human management, which was associated with decreased species diversity and host genetic diversity, and with increased host plant density. Importantly, species diversity of the habitat was the primary predictor of disease risk for wild chiltepin populations. This changed in managed populations where host genetic diversity was the primary predictor. Host density was generally a poorer predictor of disease and infection risk. These results support the dilution effect hypothesis, and underline the relevance of different ecological factors in determining disease/infection risk in host plant populations under different levels of anthropic influence. These results are relevant for managing plant diseases and for establishing conservation policies for endangered plant species.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7236470RNAVIRSPEUnspecifiedANALYSIS OF SPECIATION MECHANISMS IN RNA VIRUSES

More information

Item ID: 15847
DC Identifier: http://oa.upm.es/15847/
OAI Identifier: oai:oa.upm.es:15847
DOI: 10.1371/journal.ppat.1002796
Official URL: http://www.plospathogens.org/article/info%3Adoi%2F10.1371%2Fjournal.ppat.1002796
Deposited by: Memoria Investigacion
Deposited on: 24 Jun 2013 14:52
Last Modified: 03 Nov 2014 13:44
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