Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 431162
Title Driving factors behind the eutrophication signal in understorey plant communities of deciduous temperate forests
Author(s) Verheyen, K.; Baeten, L.; Frenne, P. De; Bernhardt-Römermann, M.; Brunet, J.; Cornelis, J.; Decocq, G.; Eriksson, O.; Dierschke, H.; Hommel, P.W.F.M.
Source Journal of Ecology 100 (2012)2. - ISSN 0022-0477 - p. 352 - 365.
DOI https://doi.org/10.1111/j.1365-2745.2011.01928.x
Department(s) CE - Forest Ecosystems
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) coppice-with-standards - ellenberg indicator values - ground-layer vegetation - white-tailed deer - nitrogen deposition - leaf-litter - species richness - atmospheric deposition - soil acidification - field-measurements
Abstract 1. Atmospheric nitrogen (N) deposition is expected to change forest understorey plant community composition and diversity, but results of experimental addition studies and observational studies are not yet conclusive. A shortcoming of observational studies, which are generally based on resurveys or sampling along large deposition gradients, is the occurrence of temporal or spatial confounding factors. 2. We were able to assess the contribution of N deposition versus other ecological drivers on forest understorey plant communities by combining a temporal and spatial approach. Data from 1205 (semi-)permanent vegetation plots taken from 23 rigorously selected understorey resurvey studies along a large deposition gradient across deciduous temperate forest in Europe were compiled and related to various local and regional driving factors, including the rate of atmospheric N deposition, the change in large herbivore densities and the change in canopy cover and composition. 3. Although no directional change in species richness occurred, there was considerable floristic turnover in the understorey plant community and a shift in species composition towards more shade-tolerant and nutrient-demanding species. However, atmospheric N deposition was not important in explaining the observed eutrophication signal. This signal seemed mainly related to a shift towards a denser canopy cover and a changed canopy species composition with a higher share of species with more easily decomposed litter. 4. Synthesis. Our multi-site approach clearly demonstrates that one should be cautious when drawing conclusions about the impact of atmospheric N deposition based on the interpretation of plant community shifts in single sites or regions due to other, concurrent, ecological changes. Even though the effects of chronically increased N deposition on the forest plant communities are apparently obscured by the effects of canopy changes, the accumulated N might still have a significant impact. However, more research is needed to assess whether this N time bomb will indeed explode when canopies will open up again.
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