Daniela Hohenstern
Institute of Forest Ecosystems

Alfred-Möller-Straße 1, Haus 41/42
16225 Eberswalde
Phone: +49 3334 3820 300
Fax: +49 3334 3820 354

Contact persons for

Level II



The Intensive Forest Monitoring (Level II) is performed within selected forest sites (case studies). Data on relevant parameters is collected periodically or even continuously in order to describe status and development of forest ecosystems.

Background and Objective

The Level II monitoring  is complementing the area-representative Level I monitoring (Crown condition assessment (WZE) and Soil survey (BZE)). It is part of the International Co-operative Programme on the Assessment of Air Pollution Effects on Forests (ICP Forests) under the umbrella of the Convention on Long-range Transboundary Air Pollution (CLRTAP). Established since the 1990s the permanent plots hold a variety of equipment to perform ecosystem-related studies on cause-effect relationships. In Germany data is collected on 68 sites for in total 14 surveys, partly in high temporal resolution. Data is quality checked, and fed into a data base at the PCC of ICP Forests. These activities performed by the German federal states are covered by a federal regulation based on the federal forest law since 01/01/2014. The collected data are internally evaluated and provided for national and international studies. At the moment in- and output studies of forest ecosystems are performed. Standard evaluation routines are developed as well.


The German federal states collect the data according to a internationally homogenised manual within the following surveys: crown condition, increment, foliar element concentrations, litterfall, phenology, visible ozon injuries, ground vegetation, deposition, meteorology, soil solution and soil solid phase. Quality checks are also perfomed after the manual. Gap replacement as well as the application of canopy flux models are applied according to adequate process-related models. Inference statistics are for crown condition, increment, foliar element concentrations or ground vegetation as response variables and deposition, soil, climate-related variables, or soil parameters as drivers are performed at different temporal and spatial scales.


Involved Thünen-Partners


Permanent task 1.1995

More Information

Projekt type:
Project status: ongoing


Results 1 - 5 of 16

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  1. Wang S, Zhang Y, Ju W, Chen JM, Cescatti A, Sardans J, Janssens IA, Wu M, Berry JA, Campbell E, Fernandez-Martinez M, Alkama R, Sitch S, Smith WK, Yuan W, He W, Lombardozzi D, Kautz M, Sanders TGM, Krüger I, et al (2021) Response to Comments on "Recent global decline of CO2 fertilization effects on vegetation photosynthesis". Science 373(6562):1-8, DOI:10.1126/science.abg7484
  2. Sanders TGM, Krüger I, Holzhausen M (2020) Das intensive forstliche Monitoring - Level II. Eberswalde: Thünen-Institut für Waldökosysteme, 2 p, Project Brief Thünen Inst 2020/25, DOI:10.3220/PB1608106763000
    pdf document (limited accessibility) 660 kb
  3. Sanders TGM, Spathelf P, Bolte A (2019) The response of forest trees to abiotic stress. Burleigh Dodds Ser Agric Sci 71:99-116, DOI:10.19103/AS.2019.0057.05
  4. Krause S, Strer M, Mund J-P, Sanders TGM (2019) UAV remote sensing data handling: A transition from testing to long-term data acquisition for intensive forest monitoring. J Photogramm Remote Sensing Geoinf Sci 28(39):167-174
  5. Prescher A-K, Schmitz A, Sanders TGM, Nussbaumer A, Karlsson GP, Neirynck J, Gottardini E, Hansen K, Johnson J, Nieminen TM, Schaub M, Ukonmaanaho L, Vanguelova EI, Verstraeten A, Waldner P (2018) Change in sulphur pools in forest ecosystems following the reduction of atmospheric sulphur dioxide. Geophys Res Abstr 20:9027
    pdf document (limited accessibility) 41 kb

Results 1 - 5 of 16

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