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Niche differentiation within a cryptic pathogen complex: climatic drivers and hyperparasitism at multiple spatial scales

Faticov, Maria and Desprez-Loustau, Marie-Laure and Kiss, Levente and Massot, Marie and d'Arcier, Julie Faivre and Mutz, Jessie and Nemeth, Mark Z. and Roslin, Tomas and Tack, Ayco J. M. (2022). Niche differentiation within a cryptic pathogen complex: climatic drivers and hyperparasitism at multiple spatial scales. Ecography. 2022 :2
[Research article]

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Abstract

Pathogens are embedded in multi-trophic food webs, which often include co-occurring cryptic species within the same pathogen complex. Nonetheless, we still lack an understanding of what dimensions of the ecological niche might allow these cryptic species to coexist. We explored the role of climate, host characteristics (tree autumn phenology) and attack by the fungal hyperparasite Ampelomyces (a group of fungi attacking plant pathogens) in defining the niches of three powdery mildew species (Erysiphe alphitoides, E. hypophylla and E. quercicola) within a cryptic pathogen complex on the pedunculate oak Quercus robur at the continental (Europe), national (Sweden and France) and landscape scales (a 5 km(2) island in southwestern Finland). Previous studies have shown that climate separated the niches of three powdery mildew species (E. alphitoides, E. hypophylla and E. quercicola) in Europe and two species (E. alphitoides and E. quercicola) in France. In our study, we did not detect a significant relationship between temperature or precipitation and the distribution of E. alphitoides and E. hypophylla present in Sweden, while at the landscape scale, temperature, but not relative humidity, negatively affected disease incidence of E. alphitoides in an exceptionally warm year. Tree variation in autumn phenology did not influence disease incidence of powdery mildew species, and hyperparasite presence did not differ among powdery mildew species at the continental, national and landscape scale. Climate did not affect the distribution of the hyperparasite at the continental scale and at the national scale in Sweden. However, climate affected the hyperparasite distribution in France, with a negative relationship between non-growing season temperature and presence of the hyperparasite. Overall, our findings, in combination with earlier evidence, suggest that climatic factors are more important than species interactions in defining the niches of cryptic species within a pathogen complex on oak.

Authors/Creators:Faticov, Maria and Desprez-Loustau, Marie-Laure and Kiss, Levente and Massot, Marie and d'Arcier, Julie Faivre and Mutz, Jessie and Nemeth, Mark Z. and Roslin, Tomas and Tack, Ayco J. M.
Title:Niche differentiation within a cryptic pathogen complex: climatic drivers and hyperparasitism at multiple spatial scales
Series Name/Journal:Ecography
Year of publishing :2022
Volume:2022
Number:2
Number of Pages:12
Publisher:WILEY
ISSN:0906-7590
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:climate variation, cryptic pathogen species, hyperparasite, niche differentiation, spatial distribution
URN:NBN:urn:nbn:se:slu:epsilon-p-116032
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116032
Additional ID:
Type of IDID
DOI10.1111/ecog.06062
Web of Science (WoS)000743333600001
ID Code:27415
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:21 Mar 2022 12:25
Metadata Last Modified:21 Mar 2022 12:31

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