In: Oecologia, 2007, vol. 152, no. 2, p. 265-273
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In: Basic and Applied Ecology, 2009, vol. 10, no. 5, p. 427-436
Facilitation of tree regeneration by nurse shrubs that offer protection against large herbivores is an important driver of wood-pasture dynamics. Here we asked whether the response to facilitation by nurse shrubs depends on the grazing resistance of the protégé saplings. We experimentally tested the protective effects of the thorny Rosa rubiginosa on browsing frequency, survival, and biomass...
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In: Oecologia, 2007, vol. 152, no. 2, p. 265-273
Current conceptual models predict that an increase in stress shifts interactions between plants from competitive to facilitative; hence, facilitation is expected to gain in ecological importance with increasing stress. Little is known about how facilitative interactions between plants change with increasing biotic stress, such as that incurred by consumer pressure or herbivory (i.e....
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In: Forest Ecology and Management, 2006, vol. 237, no. (1-3), p. 471-477
In wood pastures spatial associations of tree saplings with nurse structures such as unpalatable plants are generally explained as associational resistance; i.e. reduced herbivory by association with a defended neighbour. However, these associations may result from other underlying processes that occur at the seed stage. Here we tested whether the observed associations between...
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In: Journal of Vegetation Science, 2005, vol. 16, no. 2, p. 209-214
Question: Are tree saplings in wooded pastures spatially associated with specific nurse structures or plants that facili-tate tree sapling survival? Location: Wooded pastures in the Jura Mountains, Switzer-land. Methods: In two sites, 73 km apart, we sampled 294 plots of4 m², systematically distributed on 1 ha. We recorded number and height of all established Picea abies...
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In: Journal of Applied Ecology, 2006, vol. 43(2), p. 305
1. In endangered wooded pasture ecosystems established tree saplings are frequently found in spatial association with protective structures, suggesting nurse effects. This associational resistance is thought to be a driving force behind tree regeneration in wooded pastures. Experimental evidence for associational resistance is, however, scarce. We studied the effects of unpalatable plants on tree...
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