Sentences with phrase «macrofossils in»
Overall, the drastic reduction of the forest cover was followed by a lowering of approximately 30 m of the regional forest line — the difference between maximum position in altitude of krummholz and woodland — and approximately 50 m of the regional tree line (i.e. the difference between maximum altitude of spruce macrofossils in tundra sites and position of the current tree line).
http://rstb.royalsocietypublishing.org/ Not exact matches
We assume that the presence of chile is in the form of a sauce or paste, and not whole given that no seeds or other macrofossils were identified in the interiors of the vessels.»
«These include the sharp mud - over-peat contacts that are laterally continuous over 5 kilometers, changes in fossil foraminifera assemblages across the buried peat contacts, long - lasting submergence also derived from fossil foraminifera records, and radiocarbon ages of plant macrofossils taken from buried peat deposits that are consistent with other southern Cascadia earthquake chronologies derived from buried peat and tsunami deposits.»
«Abstract To investigate the Holocene climate and treeline dynamics in the European Russian Arctic, we analysed sediment pollen, conifer stomata, and plant macrofossils from Lake Kharinei, a tundra lake near the treeline in the Pechora area.
(iv) Sites with charcoal macrofossils beneath, in, and above the current organic horizon (corresponding to the large majority of the remaining sites of the study area) are treeless stands composed of a much scattered cover (generally < 1 %) of black spruce shrubs — i.e. sites burned probably more than twice since initial forest establishment, without successful tree regeneration and currently forming lichen - shrub tundra.
(i) Fire - free sites are those sites without charcoal macrofossils beneath, in, and on the current organic horizon (corresponding to 10 % of the surface of the study area) and with stands composed of a dense cover (generally > 40 %) of black spruce trees and shrubs — i.e. sites free of fire disturbance during a long period, but of unknown duration, of the Holocene.
Variations in climate can be determined by the analysis of biological data like annual tree rings, fossilized pollen and other plant macrofossils, the abundance and distribution of insects and other organisms, and the biota in lake sediments.
Patterns and rates of plant migration are documented using our macrofossil studies in combination with pollen stratigraphy.
Late Tertiary plant macrofossils from localities in Arctic / Subarctic North America: A review of data