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Selection: Guyot:V [3 articles] 

Publications by author Guyot:V.
 

Tree diversity reduces pest damage in mature forests across Europe

  
Biology Letters, Vol. 12, No. 4. (27 April 2016), 20151037, https://doi.org/10.1098/rsbl.2015.1037

Abstract

Forest pest damage is expected to increase with global change. Tree diversity could mitigate this impact, but unambiguous demonstration of the diversity–resistance relationship is lacking in semi-natural mature forests. We used a network of 208 forest plots sampled along two orthogonal gradients of increasing tree species richness and latitudes to assess total tree defoliation in Europe. We found a positive relationship between tree species richness and resistance to insect herbivores: overall damage to broadleaved species significantly decreased with the number of ...

 

Biotic homogenization can decrease landscape-scale forest multifunctionality

  
Proceedings of the National Academy of Sciences, Vol. 113, No. 13. (29 March 2016), pp. 3557-3562, https://doi.org/10.1073/pnas.1517903113

Abstract

[Significance] Numerous studies have demonstrated the importance of biodiversity in maintaining multiple ecosystem functions and services (multifunctionality) at local spatial scales, but it is unknown whether similar relationships are found at larger spatial scales in real-world landscapes. Here, we show, for the first time to our knowledge, that biodiversity can also be important for multifunctionality at larger spatial scales in European forest landscapes. Both high local (α-) diversity and a high turnover in species composition between locations (high β-diversity) were found to ...

 

Tree diversity limits the impact of an invasive forest pest

  
PLoS ONE, Vol. 10, No. 9. (11 September 2015), e0136469, https://doi.org/10.1371/journal.pone.0136469

Abstract

The impact of invasive herbivore species may be lower in more diverse plant communities due to mechanisms of associational resistance. According to the “resource concentration hypothesis” the amount and accessibility of host plants is reduced in diverse plant communities, thus limiting the exploitation of resources by consumers. In addition, the “natural enemy hypothesis” suggests that richer plant assemblages provide natural enemies with more complementary resources and habitats, thus promoting top down regulation of herbivores. We tested these two hypotheses by comparing ...

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