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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2014
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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) |
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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_ |
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