ORBi: Dury Marie - Simulating the Holocene re-colonization of Europe by tree species using dynamic vegetation models

Reference : Simulating the Holocene re-colonization of Europe by tree species using dynamic vegetati...


	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
	To cite this reference:	http://hdl.handle.net/2268/124164

Title :	Simulating the Holocene re-colonization of Europe by tree species using dynamic vegetation models
Language :	English
Author, co-author :	Dury, Marie [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Modélisation du climat et des cycles biogéochimiques >]
	Lehsten, Dörte [ > > ]
	Warnant, Pierre [ > > ]
	François, Louis [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Modélisation du climat et des cycles biogéochimiques >]
	Dullinger, Stefan [ > > ]
	Polska, Anneli [ > > ]
	Hülber, Karl [ > > ]
	Cheddadi, Rachid [ > > ]
	Laborde, Henri [ > > ]
	Sykes, Martin [ > > ]
	Hickler, Thomas [ > > ]
	Singarayer, Joy [ > > ]
Publication date :	Jul-2011
On invitation :	No
Audience :	International
Event name :	XVIII INQUA Congress
Event date :	du 21 au 27 juillet 2011
Event organizer :	International Union for Quaternary Research
Event place (city) :	Berne
Event country :	Suisse
Keywords :	[en] vegetation ; modelling ; species dispersal ; Holocene ; Europe
Abstract :	[en] Pollen and macro-fossil data collected from various localities in Europe provide the opportunity to reconstruct the speed and the routes of the post-glacial spread of European tree species. Moving from a limited number of refugia at the end of the glacial period, tree species have progressively re-colonized the continent through the Holocene at seemingly species-specific migration rates. However, the relative roles of climatic fluctuations, dispersal capacities of individual species, and inter-specific competition in controlling these rates remains controversial. Here, we investigate these different aspects with two dynamic vegetation models (DVM), LPJ-GUESS and CARAIB. Transient runs of both models were performed over the Holocene, using HadCM3 GCM-reconstructed climate. Large-scale species migration at 0.5°x0.5° is represented in these models using migration rates derived from a small-scale cellular automaton, CATS. Individual tree species migration rates were pre-calculated with CATS every 1000 years over each grid cell used by the DVMs in the climatic conditions reconstructed by the GCM. In the DVMs, these migration speeds were influenced by the response to competition from other species. The DVMs were used to study the migration of one species, from its 10 kyr BP refugia, within a landscape defined by a set of other species for which no dispersal limitations are assumed. Here, we illustrate the results obtained for three wind-dispersed tree species: Abies alba, Picea abies, Fagus sylvatica and compare them to their past distributions reconstructed from pollen and macro-fossil data.
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/124164

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