Joachim Block and Hans Werner Schröck. Forschungsanstalt für Waldökologie und Forstwirtschaft Rheinland-Pfalz

Transkript

1 Comparative assessment of the suitability of the tree species sessile oak, common beech, Scots pine and Douglas-fir on Triassic sandstone locations at different climate scenarios as a contribution to the development of new, regional forest management strategies Joachim Block and Hans Werner Schröck

2 Part of: WP2 Development of tools for surveying forest site and forest stand shifts, risk assessment, water regime assessment and assessment of goods and services c) Assessment and monitoring by field surveys Cooperating partners: (FAWF) Universität Trier, FB IV, Abt. Geobotanik TU München, Lehrstuhl für Waldwachstumskunde

3 Regional forestry management strategies in response to different climatechangeimpacts Region: Pfälzerwald ha biosphere reserve Typical forest region for low mountain range exposure Soil: Triassic sandstone; Cambisol, dystric; base saturation <10%

4 Locations of the test plots Stand type common beech sessile oak / common beech Scots pine / common beech Douglas-fir Douglas-fir / common beech Plot characteristics: altitude m asl: m mean annual temperature: 7,9 C mean temperature (May-Sept.): 14,3 C mean annual precipitation: mm precipitation (May-Sept.): 423 mm

5 Main aims Implementing recommendations for forest owners and policy makes necessary the collection of basics as comprehensive as possible. Economic advantages and disadvantages of the five stand types (yield of wood, economic yield, options of using timber and dendromass for material and energetic utilization) Risks resulting from abiotic and biotic stress influences Ecological advantages and disadvantages of the five stand types (nutrient budget, biodiversity, close-to-naturalness) Impact on the environment (water retention, groundwater recharge, groundwater and spring water quality, carbon storage)

6 Assessment of: (part 1) Water and nutrient budget Measurement of material input (atmospheric deposition, mineral decomposition) und material output (seepage water) Simulation by applying the water budget model COUP-MODEL Competing performance of common beech Douglas-fir Water use efficiency; effects of drought periods (dendrometer, sap flow measurements, tensiometer) (lectures by W. Werner, M. Haßdenteufel) Tree-ring analysis and carbon discrimination, root growth, natural regeneration Growth and dendromass production Measurement of the growing stock and increment in the total aboveground stand Simulation by applying the growth models BALANCE, SILVA (lecture by T. Roetzer)

7 Assessment of: (part 2) Nutrient and carbon removal within forest harvesting Measurement of the distribution of nutrient levels within the tree Simulation of nutrient removal by different harvesting methods by applying the growth models SILVA und BALANCE Biotic and abiotic stress influences Measurement of the effects of drought on tree growth Influence of pests (lecture by H. Delb) Estimation of the impact of weather extremes in the measurement period as well as in retrospect Genetic studies (Douglas-fir,...) (lecture by W. Maurer)

8 Common beech pure stand (age: 56)

9 Douglas-fir pure stand (age: 50)

10 Douglas-fir - common beech mixed stand

11 Drilling for measuring holes sap flow Sap flow measurements, dendrometer, tensiometer, stem flow Treeclimbing for sampling leaves

12 Oak (with common beech) age: 44

13 Scots pine (with common beech) age: 34

14 Requirements for other groups Scaling down of ECHAM 5 using at least two different methods (Remo, Wettreg, CLM or different ones); Control Run and comparison with the present measuring results Simulation of scenarios A1B, B1 and A1 Selection of a medium, a humid and a dry realization Description of dates (daily sum, daily mean) including the parameters rainfall, air temperature, humidity, solar radiation, wind speed for the period from 2000 to 2100 for three selected meteorological monitoring stations Important for biological reactions are in particular all extreme events like storms, hail or drought stress as triggers for pest calamities.

15 Politicians of the State Parliament of (Enquetekommission 15/1 Klimawandel )