API src

Found 8 results.

Related terms

Other language confidence: 0.8736930044069406

Raw pollen data from the Eemian core CON01-603-2

The studied core CON01-603-2 was recovered from the Continent site, Northern Basin from a water depth of 386 m (Fig. 1) (see Charlet et al., 2005-this volume). The analysed sequence (725.5–608 cm) consists of mainly of biogenic, diatomaceous sediments, although the upper part of the sequence between ca. 611–608 cm contains more silt particles and less diatoms than the lower part of the sequence. From a depth of 690 cm upwards the sediments are finely and coarsely laminated.Based on a standard technique for processing palynological samples, silicates were removed from the sediment by treatment with 40% HF for 3 days and with 50% HF for 1 day. Following Erdtmans acetolysis (Faegri and Iversen, 1989) sediment samples were sieved through 7-µm meshes in an ultrasonic water bath (Cwynar et al., 1979).

Raw pollen data from kasten core CON01-603-5 part2 (%)

Sediment slices of 0.5 cm thickness were obtained from gravity core segments and of 1 cm thickness from the Vydrino piston core. Volumetric subsamples of 5 cm3 (10 cm3 in case of the lowermost samples from Continent core) were prepared according to standard procedures, including 7-μm ultrasonic fine-sieving (Cwynar et al., 1979, Fægri et al., 1989 K. Fægri, P.E. Kaland and K. Krzywinski, Textbook of Pollen Analysis (4th edition), John Wiley & Sons, Chichester (1989) 328 pp..Fægri et al., 1989 and PALE Steering Committee, 1994). Two tablets of Lycopodium marker spores were added to each sample for calculating total pollen and spore concentrations (Stockmarr, 1971). Water-free glycerol was used for storage and preparation of microscopic slides. The palynological samples were counted at magnifications of 400–600×, applying 1000× for the identification of difficult pollen types, e.g., including Saxifragaceae, Crassulaceae, and Rosaceae.

Raw pollen data from kasten core CON01-603-5 part2 (counts)

Sediment slices of 0.5 cm thickness were obtained from gravity core segments and of 1 cm thickness from the Vydrino piston core. Volumetric subsamples of 5 cm3 (10 cm3 in case of the lowermost samples from Continent core) were prepared according to standard procedures, including 7-μm ultrasonic fine-sieving (Cwynar et al., 1979, Fægri et al., 1989 K. Fægri, P.E. Kaland and K. Krzywinski, Textbook of Pollen Analysis (4th edition), John Wiley & Sons, Chichester (1989) 328 pp..Fægri et al., 1989 and PALE Steering Committee, 1994). Two tablets of Lycopodium marker spores were added to each sample for calculating total pollen and spore concentrations (Stockmarr, 1971). Water-free glycerol was used for storage and preparation of microscopic slides. The palynological samples were counted at magnifications of 400–600×, applying 1000× for the identification of difficult pollen types, e.g., including Saxifragaceae, Crassulaceae, and Rosaceae.

Raw pollen data from kasten core CON01-605-5 (Vydrino)

Sediment slices of 0.5 cm thickness were obtained from gravity core segments and of 1 cm thickness from the Vydrino piston core. Volumetric subsamples of 5 cm3 (10 cm3 in case of the lowermost samples from Continent core) were prepared according to standard procedures, including 7-μm ultrasonic fine-sieving (Cwynar et al., 1979, Fægri et al., 1989 K. Fægri, P.E. Kaland and K. Krzywinski, Textbook of Pollen Analysis (4th edition), John Wiley & Sons, Chichester (1989) 328 pp..Fægri et al., 1989 and PALE Steering Committee, 1994). Two tablets of Lycopodium marker spores were added to each sample for calculating total pollen and spore concentrations (Stockmarr, 1971). Water-free glycerol was used for storage and preparation of microscopic slides. The palynological samples were counted at magnifications of 400–600×, applying 1000× for the identification of difficult pollen types, e.g., including Saxifragaceae, Crassulaceae, and Rosaceae.

Raw pollen data from piston core CON01-605-3 (Vydrino)

Sediment slices of 0.5 cm thickness were obtained from gravity core segments and of 1 cm thickness from the Vydrino piston core. Volumetric subsamples of 5 cm3 (10 cm3 in case of the lowermost samples from Continent core) were prepared according to standard procedures, including 7-μm ultrasonic fine-sieving (Cwynar et al., 1979, Fægri et al., 1989 K. Fægri, P.E. Kaland and K. Krzywinski, Textbook of Pollen Analysis (4th edition), John Wiley & Sons, Chichester (1989) 328 pp..Fægri et al., 1989 and PALE Steering Committee, 1994). Two tablets of Lycopodium marker spores were added to each sample for calculating total pollen and spore concentrations (Stockmarr, 1971). Water-free glycerol was used for storage and preparation of microscopic slides. The palynological samples were counted at magnifications of 400–600×, applying 1000× for the identification of difficult pollen types, e.g., including Saxifragaceae, Crassulaceae, and Rosaceae.

FP4-ENV 2C, Auswirkung der Aenderung in der Landnutzung/Bodenbedeckung auf Kohlenstoff- und Wasserfluesse mediterraner Waelder

Mit Hilfe eines prozessorientierten PiXEL-Modells (PROXEL), welches oekophysiologische, mikrometeorologische und biogeochemische Prinzipien integriert, sollen der Wasser- und Kohlenstoffhaushalt in mediterranen Oekosystemen (Eichenwaelder und -macchien) untersucht werden. Im Vordergrund steht dabei die Reaktion der Kompartimente Vegetation und Boden auf Trockenstress. Zentrale Kalibrierungs- und Validierungsgrundlage stellen dabei die innerhalb der MEDEFLU/EUROFLUX-Projekte gewonnen Eddy-Kovarianz-Fluss-Daten dar. Ergaenzende, eigene Messungen zu Teilprozessen (zB Wurzelwasseraufnahme, Bodenatmung) sind geplant. Das validierte Modell soll innerhalb eines Raster-GIS fuer Fragestellungen auf Landschaftsebene angewendet werden. Eventuelle Modellanwendungen sind die Analyse der Reaktion des Wasser- und Kohlenstoffkreislaufs auf Klima- und Landnutzungsaenderungen (inclusive Feuer und Sukzession). Hauptauftragnehmer: Consiglio Nazionale delle Richerche (CNR), Instituto di Analisi Ambientale e Telerilevamento Applicati alla Agricoltura; Firenze; Italy.

The Influence of Elevated CO2 on Forest Tree Recruitment

The influence of elevated CO2 on growth and development of forest tree seedlings is studied in situ in a mixed forest near Basel by using open top chambers. Plots are arranged across a light gradient so that CO2 and light interactions can be studied. Seedlings share soil space and soil resources with adult, canopy trees. We use three CO2 concentrations and higher 5 species to cover nonlinearity of response and biodiversity. Leading Questions: - Are forest trees carbon limited: Today-in the future? - What controls the alpine treeline?

Holzanatomische Untersuchungen zur Trockenresistenz einheimischer Laubholzarten

Ziel: Bestimmung des Einflusses von kontrollierten Wasserstress-Bedingungen auf die Holzanatomie. In unserer Arbeit ueber 'Gefaessverschluss-Mechanismen bei Laubhoelzern' konnte die Frage der Rolle der Thyllen beim Wassertransport und bei der Speicherung nicht genuegend geklaert werden. Dieses Projekt soll den holzanatomischen Effekt einer bzw von zwei Trockenperioden (in Freiland- und Gewaechshausbedingungen) untersuchen. Methoden: Lichtmikroskopie, Rasterelektronenmikroskopie, Bildanalyse (Geraete und Material vorhanden). Holzarten: Fagus, Fraxinus, Quercus, Robinia, Salix.

1