Vegetation history

Cambios vegetales holocenos en la región mediterránea de la Península Ibérica: ensayo de síntesis

by Santiago Riera

Santiago Riera
Revista Ecosistemas, ISBN 1697-2473, Nº 15 (1), 2006

La Península Ibérica se caracteriza por la diversidad de su paisaje vegetal y, a menudo, también por presentar una more La Península Ibérica se caracteriza por la diversidad de su paisaje vegetal y, a menudo, también por presentar una
fragmentación del mismo. Esta estructuración paisajística es el resultado de la confluencia de un conjunto de factores
topográficos, climáticos, microclimáticos, históricos, así como de una acción humana diversa y ejercida desde antiguo. La
acción integrada de estos factores ha conducido a una sectorialización del medio vegetal, así como también de los procesos de cambio ambiental.
Algunos estudios han puesto de manifiesto que la variabilidad natural de los cambios vegetales ha sido superior a lo largo del
Holoceno en los territorios mediterráneos que atlánticos (Fig. 1) (Julià et al., 2001; Riera y Julià, 2002). Las frecuencias de
cambio vegetal evidenciadas por los diagramas polínicos peninsulares se muestran en la Figura 1, apreciándose la existencia
de un mayor número de períodos de alta recurrencia de cambios en las áreas de bioclima mediterráneo (Rivas Martínez,
1987).

Fire and vegetation change during the Early Pleistocene in southeastern Australia

by Kale Sniderman

Early Pleistocene vegetation change in upland south-eastern Australia

by Kale Sniderman

Decline of a biome: evolution, contraction, fragmentation, extinction and invasion of the Australian mesic zone biota

by Kale Sniderman

A complete pollen record of the last 230 ka from Lynch’s Crater, northeastern Australia

by Sophie Lewis

Kershaw, A.P., Bretherton, S.C., van der Kaars, S. (2007) A complete pollen record of the last 230 ka from Lynch’s Crater, northeastern Australia. Palaeogeography, Palaeoclimatology, Palaeoecology 151: 23-45.

Recent drilling eventually reached to the base of the sediments of Lynch's Crater on the Atherton Tableland within the... more Recent drilling eventually reached to the base of the sediments of Lynch's Crater on the Atherton Tableland within the humid
tropics of north-eastern Australia. This paper incorporates results from the sequence extension into a complete record from the site, much of which has only been presented previously in summary form. A more certain chronology for the record is provided by recent radiocarbon dating on the topmost sediments and the application of time series analysis to the whole sequence. This suggests that the vegetation and climate are forced essentially by northern hemisphere insolation and ice volume, probably operating through sea level and sea surface temperature changes. The extended record is considered to cover the last 230,000 years and the pattern of complex rainforest expansion during wetter interglacial periods and its replacement by drier rainforest and sclerophyll vegetation
during drier glacials is maintained. Superimposed on this cyclicity are trends resulting from both the evolution of the lake basin as well as external influences that include climate and, within the last 45,000 years, people.