Title |
Forest species diversity reduces disease risk in a generalist plant pathogen invasion
|
---|---|
Published in |
Ecology Letters, September 2011
|
DOI | 10.1111/j.1461-0248.2011.01679.x |
Pubmed ID | |
Authors |
Sarah E. Haas, Mevin B. Hooten, David M. Rizzo, Ross K. Meentemeyer |
Abstract |
Empirical evidence suggests that biodiversity loss can increase disease transmission, yet our understanding of the 'diversity-disease hypothesis' for generalist pathogens in natural ecosystems is limited. We used a landscape epidemiological approach to examine two scenarios regarding diversity effects on the emerging plant pathogen Phytophthora ramorum across a broad, heterogeneous ecoregion: (1) an amplification effect exists where disease risk is greater in areas with higher plant diversity due to the pathogen's wide host range, or (2) a dilution effect where risk is reduced with increasing diversity due to lower competency of alternative hosts. We found evidence for pathogen dilution, whereby disease risk was lower in sites with higher species diversity, after accounting for potentially confounding effects of host density and landscape heterogeneity. Our results suggest that although nearly all plants in the ecosystem are hosts, alternative hosts may dilute disease transmission by competent hosts, thereby buffering forest health from infectious disease. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 1 | 25% |
South Africa | 1 | 25% |
Unknown | 2 | 50% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 2 | 50% |
Science communicators (journalists, bloggers, editors) | 1 | 25% |
Scientists | 1 | 25% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 10 | 3% |
South Africa | 4 | 1% |
Australia | 2 | <1% |
Canada | 2 | <1% |
Mexico | 2 | <1% |
Sweden | 1 | <1% |
France | 1 | <1% |
Switzerland | 1 | <1% |
New Zealand | 1 | <1% |
Other | 2 | <1% |
Unknown | 298 | 92% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 87 | 27% |
Student > Ph. D. Student | 79 | 24% |
Student > Master | 38 | 12% |
Student > Bachelor | 18 | 6% |
Student > Doctoral Student | 16 | 5% |
Other | 55 | 17% |
Unknown | 31 | 10% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 175 | 54% |
Environmental Science | 76 | 23% |
Earth and Planetary Sciences | 10 | 3% |
Biochemistry, Genetics and Molecular Biology | 5 | 2% |
Engineering | 2 | <1% |
Other | 13 | 4% |
Unknown | 43 | 13% |