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24 -- conbinations of Fagus orientalis and Populus nigra Alnus glutinosa LVL -- 90.
The second dust event (AD 920), occurring when the climate switched to drier conditions causing the rapid decline of the Tiwanaku State (Ortloff & Kolata 1993), may be linked with the beginning of Zone m-3 (AD 1050-1994) when Alnus became established.
This LPAZ is characterized by a sharp increase in the quantity of Alnus (20%), Corylus (10%) and broadleaved trees, and decrease in the amount of Pinus pollen.
Occupied Unoccupied Group/Species Mean [+ or -] SD Mean [+ or -] SD Shrubs Alnus incana ssp.
Species closely related to our red alder include Alnus glutinosa, which is know by the trade name common alder.
It will seek to buy land, make necessary compensation payments, map water and soil in target areas and introduce best-practice restoration techniques for: alluvial forests with alnus glutinosa and fraxinus excelsior; calcareous fens in the Prejmer and Harman swamps; and Eurosiberian silvo-steppe with Quercus sp.
The sudden appearance of high Alnus acuminata pollen concentrations in the Marcacocha record at the beginning of this time zone suggests an upslope migration of certain tree species in response to elevated temperatures affecting the basin.