Ecological Research

, Volume 30, Issue 2, pp 279–292 | Cite as

Estimation of annual spatial variations in forest production and crop yields at landscape scale in temperate climate regions

  • M. RuidischEmail author
  • T. T. Nguyen
  • Y. L. Li
  • R. Geyer
  • J. Tenhunen
Special Feature Long-term and interdisciplinary research on forest ecosystem functions: Challenges at Takayama site since 1993


Simulating regional variations in gross primary production (GPP) and yields of major land cover types is complex due to differences in plant physiological properties, landscape topography, and climate gradients. In our study, we analyzed the inter-annual and inter-regional variation, as well as the effect of summer drought, on gross primary production and crop yields of 9 major land uses within the state-funded Bioenergy Region Bayreuth in Germany. We developed a simulation framework using a process based model which accounts for variations in both CO2 gas exchange, and in the case of crops, growth processes. The results indicated a severe impact of summer drought on GPP, particularly of forests and grasslands. Yields of winter crops, early planted summer grain crops as well as the perennial 2nd generation biofuel crop Silphium perfoliatum, on the other hand, were buffered despite drought by comparatively mild winter and spring temperatures. We estimated regional yield increases from SW to NE, suggesting a comparative advantage for these crops in the cooler and upland part of the region. In contrast, grasslands and annual summer crops such as maize and potato did not exhibit any apparent regional pattern in the simulations. The 2nd generation bioenergy crop exhibited significantly higher GPP and yields compared to the conventional bioenergy crop maize, suggesting that cultivation of S. perfoliatum should be increased for economic and environmental reasons, but additional study of the growth of S. perfoliatum is still required.


Photosynthesis Bioenergy production Plant growth model Spatial analysis Climate change Drought 



This work was initiated as part of the project REGECON—Regional Economic Evaluation of Adaptation Measures in Agricultural, Forestry, and Bioenergy Production under the Influence of Climate Change funded by the Federal Ministry of Education and Research (BMBF) of Germany (Funding number: 01LA1101A). The authors also acknowledge the support of Mr. Asen of the Amt für Ernährung, Landwirtschaft und Forsten. Last but not least, we acknowledge those, who provided eddy-flux datasets to FLUXNET: Christian Bernhofer and Thomas Grünwald (TU Dresden, Germany), Andre Granier and Bernhard Longdoz (Institut Nationale de la Recherche Agronomique, Nancy, France), Marc Aubinet (University of Liege, Gembloux Agro-Bio Tech, Unit of Biosystems Physics, Belgium), Christine Moureaux, Tanguy Manise and Anne Ligne (University de Liège, Belgium).

Supplementary material

11284_2014_1208_MOESM1_ESM.docx (1.1 mb)
Supplementary material 1 (DOCX 1102 kb)


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Copyright information

© The Ecological Society of Japan 2014

Authors and Affiliations

  • M. Ruidisch
    • 1
    Email author
  • T. T. Nguyen
    • 2
  • Y. L. Li
    • 3
  • R. Geyer
    • 1
  • J. Tenhunen
    • 1
  1. 1.Department of Plant EcologyUniversity of BayreuthBayreuthGermany
  2. 2.Institute of Environmental Economics and World TradeLeibnitz University HannoverHannoverGermany
  3. 3.South China Botanical GardenChinese Academy of SciencesGuangzhouChina

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