Sophie Ackermann’s research while affiliated with University of Padua and other places

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Publications (1)

Fig. 1. (A) Study area, (B) study site: a 2 ha plot located in the eastern Italian Alps at an elevation of 1900 m (latitude: 46.23 N; longitude: 11.32 E).
Fig.2. The sum of model weights (∑wi) of each variable estimated by the multi-model inference procedure for each species separately (a-n). Predictors that consistently occurred in the most likely models (∑wi> 0.75) or model averaged confidence intervals that did not include 0 were taken as well supported by our data and considered the most important predictors (in grey). The distribution of lichen species was modeled using hurdle regression (a-d, f, h, k-m) or GLM (e, g, i-j, n). The direction of the relationship is indicated by (+) or (-) for continuous variables. For trees, the main host species resulting from Tukey contrasts is indicated: (L) larch, (P) stone pine, (S) spruce, and (n.s.) not significant. Interactions between tree age and DBH (A × D), and co-occurrence lichen cover, age, and DBH (L × A, L × D, and L × A × D) were also tested.
Fig.3. 3D perspective plots generated from the best plausible models (see Supplementary material Appendix C). Plots display (A) the effect of tree age and tree size (DBH) on the cover of Vulpicida pinastri, and the effect of co-occuring lichen cover and tree size (DBH) on the cover of (B) Parmeliopsis ambigua and (C) Platismatia glauca. Axes are arbitrarily rotated to provide the clearest perspective of interactions.
Fine-scale population dynamics help to elucidate community assembly patterns of epiphytic lichens in alpine forests
  • Article

September 2016

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167 Reads

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4 Citations

Fungal Ecology

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Sophie Ackermann

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We examined the main and interactive effects of factors related to habitat filtering, dispersal dynamics, and biotic interactions, on tree-level population dynamics of a subset of species composing the epiphytic lichen pool in an alpine forest. We tested these processes evaluating the population size of 14 lichen species on six hundred and sixty-five trees within a 2 ha plot located in a high elevation alpine forest of the eastern Italian Alps. Our results indicate that community assembly patterns at the tree-level are underpinned by the simultaneous effects of habitat filtering, dispersal, and biotic interactions on the fine-scale population dynamics. These processes determine how the single species are sorted into community assemblages, contributing to tree-level community diversity and composition patterns. This corroborates the view that the response of lichen communities to environmental gradients, in terms of compositional and diversity shifts, may reflect differential species responses to different drivers.

Citations (1)

... Habitat quality can include factors such as presence of particular tree species if some lichen species have preferred substrates, tree size, tree age, bark texture and pH, or presence of holes and cracks [7][8][9][10][11][12][13][14]. Diameter of the tree at breast height (DBH) is often used as a proxy for tree size [15] or age [16] and has been positively correlated with lichen species richness in mangrove forests in New Zealand [6], Mediterranean oak forests [4] and deciduous forests in Sweden [17]. ...

Reference:

Spatial Distribution of Lichens in Metrosideros excelsa in Northern New Zealand Urban Forests
Fine-scale population dynamics help to elucidate community assembly patterns of epiphytic lichens in alpine forests
  • Citing Article

  • September 2016

Fungal Ecology

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Sophie Ackermann

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[...]

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