Abstract
As a part of the ‘Intensive Forest Monitoring Programme’ of ICP Forests, ground floor vegetation has been surveyed along with parameters of other relevant components of the forest ecosystems and their environment at 80 permanent plots all over Germany. Its floristic composition and their changes can therefore be linked to a wide variety of potentially influencing factors, scrutinising recent hypotheses on floristic changes, mainly soil eutrophication and acidification due to air pollutants. Results of a broad-scaled feasibility study are presented and critically discussed with regard to future in-depth evaluations. After an overview on the most abundant species, the syntaxonomic allocation of the plots is given. An ordination reveals a gradient from nutrient and base rich soils to poor acidic soils. Floristic dynamics are mainly aligned with the main axis, but conclusions about the medium-term development cannot be stated yet. Ordination and subsequent statistics are recommended to open up a wide field for explorative investigations. Indicator values for soil acidity and nutrient supply corroborate the main floristic gradient. Based on an empirical species–area relationship (SAR), species numbers for a common plot size of 400 m2 were calculated. Basic relationships among different diversity measures and between diversity measures and basic stand and site-related parameters were elaborated. Recommendations focus on enhancements of the assessment of ground floor vegetation within the context of the Level II monitoring like annual sampling or harmonisation of the plot sizes.
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Acknowledgements
This article is based on studies performed in the project ‘Conception and Feasibility Study for Integrated Evaluations of Data from the Environmental Monitoring of Forests (IFOM)’ granted by the German Federal Ministry for Education and Science. Barbara Wolff (Eberswalde), Goddert von Oheimb (Lüneburg) and two anonymous reviewers are acknowledged for their valuable comments on the earlier versions, Wolfgang Lux and Helgard Vaqué (both Eberswalde) for their support around the data pool and Gregor Stolley (Kiel) for his valuable hints.
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Seidling, W. Ground floor vegetation assessment within the intensive (Level II) monitoring of forest ecosystems in Germany: chances and challenges. Eur J Forest Res 124, 301–312 (2005). https://doi.org/10.1007/s10342-005-0087-1
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DOI: https://doi.org/10.1007/s10342-005-0087-1