Tree cover bimodality in savannas and forests emerging from the switching between two fire dynamics.

Moist savannas and tropical forests share the same climatic conditions and occur side by side. Experimental evidences show that the tree cover of these ecosystems exhibits a bimodal frequency distribution. This is considered as a proof of savanna-forest bistability, predicted by dynamic vegetation m...

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Auteurs principaux:	Carlo De Michele, Francesco Accatino
Format:	article
Langue:	EN
Publié:	Public Library of Science (PLoS) 2014
Sujets:	Medicine R Science Q
Accès en ligne:	https://doaj.org/article/fe3fa311e75f4e5c9d27a20a978e7cf8
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id	oai:doaj.org-article:fe3fa311e75f4e5c9d27a20a978e7cf8
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spelling	oai:doaj.org-article:fe3fa311e75f4e5c9d27a20a978e7cf82021-11-18T08:26:33ZTree cover bimodality in savannas and forests emerging from the switching between two fire dynamics.1932-620310.1371/journal.pone.0091195https://doaj.org/article/fe3fa311e75f4e5c9d27a20a978e7cf82014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24663432/?tool=EBIhttps://doaj.org/toc/1932-6203Moist savannas and tropical forests share the same climatic conditions and occur side by side. Experimental evidences show that the tree cover of these ecosystems exhibits a bimodal frequency distribution. This is considered as a proof of savanna-forest bistability, predicted by dynamic vegetation models based on non-linear differential equations. Here, we propose a change of perspective about the bimodality of tree cover distribution. We show, using a simple matrix model of tree dynamics, how the bimodality of tree cover can emerge from the switching between two linear dynamics of trees, one in presence and one in absence of fire, with a feedback between fire and trees. As consequence, we find that the transitions between moist savannas and tropical forests, if sharp, are not necessarily catastrophic.Carlo De MicheleFrancesco AccatinoPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 3, p e91195 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Carlo De Michele Francesco Accatino Tree cover bimodality in savannas and forests emerging from the switching between two fire dynamics.
description	Moist savannas and tropical forests share the same climatic conditions and occur side by side. Experimental evidences show that the tree cover of these ecosystems exhibits a bimodal frequency distribution. This is considered as a proof of savanna-forest bistability, predicted by dynamic vegetation models based on non-linear differential equations. Here, we propose a change of perspective about the bimodality of tree cover distribution. We show, using a simple matrix model of tree dynamics, how the bimodality of tree cover can emerge from the switching between two linear dynamics of trees, one in presence and one in absence of fire, with a feedback between fire and trees. As consequence, we find that the transitions between moist savannas and tropical forests, if sharp, are not necessarily catastrophic.
format	article
author	Carlo De Michele Francesco Accatino
author_facet	Carlo De Michele Francesco Accatino
author_sort	Carlo De Michele
title	Tree cover bimodality in savannas and forests emerging from the switching between two fire dynamics.
title_short	Tree cover bimodality in savannas and forests emerging from the switching between two fire dynamics.
title_full	Tree cover bimodality in savannas and forests emerging from the switching between two fire dynamics.
title_fullStr	Tree cover bimodality in savannas and forests emerging from the switching between two fire dynamics.
title_full_unstemmed	Tree cover bimodality in savannas and forests emerging from the switching between two fire dynamics.
title_sort	tree cover bimodality in savannas and forests emerging from the switching between two fire dynamics.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/fe3fa311e75f4e5c9d27a20a978e7cf8
work_keys_str_mv	AT carlodemichele treecoverbimodalityinsavannasandforestsemergingfromtheswitchingbetweentwofiredynamics AT francescoaccatino treecoverbimodalityinsavannasandforestsemergingfromtheswitchingbetweentwofiredynamics
_version_	1718421840353820672

Tree cover bimodality in savannas and forests emerging from the switching between two fire dynamics.

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