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Reis S.M.,Programa de Pos Graduacao em Biodiversidade e Biotecnologia | de Oliveira E.A.,Programa de Pos Graduacao em Biodiversidade e Biotecnologia | Elias F.,Federal University of Pará | Gomes L.,University of Brasilia | And 6 more authors.
Revista Brasileira de Botanica | Year: 2017

The savanna formations of the Brazilian “Cerrado” present a high degree of resistance and resilience to the impacts of fire, although little is known of its forest formations. Given this, the present study evaluated the resistance and resilience of the “Cerradão” to fire impacts over a 7-year period. In March 2008, we established 50 permanent plots of 10 m × 10 m and measured all the woody individuals with a base diameter ≥5 cm. Six months later, all plots were burned by an accidental fire. In March 2012 and March 2015, we re-measured all surviving individuals, and measured the recruits. Species richness, the density of individuals, and the basal area were all significantly greater (P < 0.05) in 2008, prior to the fire, in comparison with 2012 and 2015, after the fire. Species richness and the density of individuals were also higher (P < 0.05) in 2015, about 7 years post-fire, in comparison with 2012. During the interval in which the fire occurred (2008–2012), the mortality and reposition time, and the stability were all higher (P < 0.05) than during the subsequent interval, post-fire (2012–2015). The recruitment rate was also lower between 2008 and 2012 (P < 0.05). Our results indicate that the “Cerradão” has reduced resistance and resilience to the disturbances caused by fire relative to savanna formations. Given this, frequent burn-off may cause drastic alterations to this phytophysiognomy, emphasizing the need for special care for the preservation of its biodiversity. © 2016, Botanical Society of Sao Paulo.


Morandi P.S.,Programa de Pos graduacao em Biodiversidade e Biotecnologia | Marimon-Junior B.H.,Mato Grosso State University | de Oliveira E.A.,Programa de Pos graduacao em Biodiversidade e Biotecnologia | Reis S.M.,Programa de Pos graduacao em Biodiversidade e Biotecnologia | And 4 more authors.
Edinburgh Journal of Botany | Year: 2015

The occurrence of cerrado (as tree and shrub savanna is called in Brazil) and forest formations side by side is common at the southern margin of the Brazilian Amazonian Forest, and previous studies have demonstrated the advance of forests over cerrado areas. The aim of the present study is to provide an accurate documentation of the transition process between the two major biomes. Tree data (≥ 5 cm diameter at 0.3 m above soil level) from three plots of cerrado sensu stricto lying near three of cerradão (the taller, denser form of cerrado) were inventoried starting in 2002 in an area of 1.5 ha made up of 150 subplots of 10 × 10 m (50 in each area). This showed that the most important species of the cerradão were invading areas previously occupied by smaller, lower forms of cerrado (although it is sometimes difficult to define which are ‘forest’ and which ‘cerrado’ species as many are flexible in size – for instance Emmotum nitens can often be intermediate, establishing in cerrado that develops into cerradão and on to forest). Some typical species such as Eriotheca gracilipes and Emmotum nitens, established since the first inventories, have increased their populations (between 27 and 210%). Tachigali vulgaris, a typical, weedy, adventive species of the Cerrado–Amazonian Forest transition, showed the largest increase in abundance in areas of cerrado sensu stricto (between 100 and 1200%), and is probably the most important pioneer species in the initial advance of the forest into cerrado at the Southern Amazonian border. Copyright © Trustees of the Royal Botanic Garden Edinburgh 2015


Morandi P.S.,Programa de Pos graduacao em Biodiversidade e Biotecnologia | Marimon-Junior B.H.,Programa de Pos graduacao em Biodiversidade e Biotecnologia | Marimon-Junior B.H.,Mato Grosso State University | De Oliveira E.A.,Programa de Pos graduacao em Biodiversidade e Biotecnologia | And 6 more authors.
Edinburgh Journal of Botany | Year: 2015

The occurrence of cerrado (as tree and shrub savanna is called in Brazil) and forest formations side by side is common at the southern margin of the Brazilian Amazonian Forest, and previous studies have demonstrated the advance of forests over cerrado areas. The aim of the present study is to provide an accurate documentation of the transition process between the two major biomes. Tree data (≥ 5 cm diameter at 0.3 m above soil level) from three plots of cerrado sensu stricto lying near three of cerradão (the taller, denser form of cerrado) were inventoried starting in 2002 in an area of 1.5 ha made up of 150 subplots of 10 × 10 m (50 in each area). This showed that the most important species of the cerradão were invading areas previously occupied by smaller, lower forms of cerrado (although it is sometimes difficult to define which are 'forest' and which 'cerrado' species as many are flexible in size - for instance Emmotum nitens can often be intermediate, establishing in cerrado that develops into cerradão and on to forest). Some typical species such as Eriotheca gracilipes and Emmotum nitens, established since the first inventories, have increased their populations (between 27 and 210%). Tachigali vulgaris, a typical, weedy, adventive species of the Cerrado-Amazonian Forest transition, showed the largest increase in abundance in areas of cerrado sensu stricto (between 100 and 1200%), and is probably the most important pioneer species in the initial advance of the forest into cerrado at the Southern Amazonian border. © Copyright 2015 Trustees of the Royal Botanic Garden Edinburgh.

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