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| Registros recuperados: 41 | |
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| Portela,Rita Cássia Quitete; Matos,Dalva Maria Silva; Siqueira,Ludmila Pugliese de; Braz,Maria Isabel Guedes; Silva-Lima,Leonardo; Marrs,Robert Hunter. |
| This paper describes the variation of the above-ground biomass, necromass, and net above-ground primary production (NAGPP) of two weed species, Panicum maximum Jacquin (Poaceae) and Pteridium arachnoideum (Kaulf.) Maxon. (Dennstaedtiaceae), at two sites in the Poço das Antas Biological Reserve, southeast Brazil. Both species form mono-dominant stands in the matrix surrounding forest fragments. The organic matter was sampled monthly from each site, separated into biomass and necromass, and net above-ground primary production (NAGPP) was calculated. There was marked intra-seasonal fluctuation for both species; Pa. maximum generally had the largest values for necromass, total mass and NAGPP (NAGPP, Pa. maximum = 3953 g.m-2.y-1, Pt. arachnoideum = 2667... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fire; Panicum maximum; Plant invasion; Pteridium arachnoideum. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000200029 |
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| Lenza,Eddie; Abadia,Ana Clara; Menegat,Hélio; Lúcio,Nadjarriny W.; Maracahipes-Santos,Leonardo; Mews,Henrique A.; Santos,Josias O. dos; Martins,Jhany. |
| ABSTRACT We surveyed two savanna sites, one on flat terrain with deep soil (DS), and the other on hilly terrain with rocky outcrops and shallow soil (RS), before and after an accidental fire. We found that the fire did not cause any significant changes in the species composition or diversity of either community, and did not result in floristic homogenization. However, we did record a reduction in the density of plants and in basal area in the DS savanna in comparison with the RS savanna, as well as a higher rate of basal sprouting, which indicates a trade-off between mortality and sprouting. We conclude that, whereas post-fire changes in vegetation structure were more pronounced in the DS savanna than in the RS, the difference in the underlying substrate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Fire; Fuel; Savanna; Species composition. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200250 |
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| Massi,Klécia Gili; Franco,Augusto César. |
| ABSTRACT Cerrado tree species can survive fire by resprouting. Generally, large and less damaged plants produce new branches and leaves from stem buds (aerial), whereas small and highly injured individuals would resprout from the stem base or from underground organs (basal). We compared the three most common Cerrado woody plant species in a savanna area of the IBGE Ecological Reserve, Brasília, Brazil, aiming to verify if the resprouting strategy (aerial or basal) differed between species and if that was related to plant size. Guapira noxia had small-sized plants, a higher percentage of trunk charred and more individuals with basal resprouting, while Eriotheca pubescens had large-sized plants with a greater intensity of aerial resprouting, Basal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; Disturbance; Fire; Resprout; Size; Tree. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000400693 |
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| Pinto,José Roberto Rodrigues; Mews,Henrique Augusto; Jancoski,Halina Soares; Marimon,Beatriz Schwantes; Bomfim,Bárbara de Oliveira. |
| Campos de murundus (grasslands dotted with knolls that are covered with savanna-like woody vegetation) are a common landscape in central Brazil. In this study, we assessed for the first time the dynamics of the vegetation in a floodplain campo de murundus, describing changes in composition and structure of the woody vegetation. In 2005, we established 16 permanent 25 × 25 m plots, where we identified and mapped individuals with a trunk diameter at the base ≥ 2.86 cm, as well as measuring the height of those individuals. In 2008 (after two fire events), we resampled the plots. In 2005, we had registered 4.54 m² ha-1 of basal area, 430 individuals, 42 species, 36 genera and 24 families. In 2008, we found an increase in basal area (to 4.65 m² ha-1) and a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Earth mounds; Fire; Mortality; Recruitment; Savanna. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400005 |
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| Sousa,Diego Guimarães de; Cunha,Hélida Ferreira da. |
| ABSTRACT Understanding how fire affects the plant biota of the Cerrado is essential for formulating conservational strategies. We evaluated the effects of fires during different periods of the year on the populational structure of Anacardium humile. The research was carried out in areas of typical cerrado stricto sensu in the territory of the Kalunga, state of Goiás, Brazil. These areas, which comprise the same population, were submitted to the following treatments: unburned (control), burned in May 2016 (early fire - EF), and burned in September 2016 (late fire - LF). In July 2018, we delimited two contiguous transects of 100 x 20 m, subdivided into 10 plots of 20 x 20 m, in each area. Fire stimulated the development of branches from basal regrowth in EF... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anacardiaceae; Burning; Cerrado; Fire; Impact; Regimes. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000200401 |
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| Souchie,Fabiane Furlaneto; Pinto,Jose Roberto Rodrigues; Lenza,Eddie; Gomes,Letícia; Maracahipes-Santos,Leonardo; Silvério,Divino Vicente. |
| ABSTRACT Post-fire response by vegetation may reflect the severity of the damage suffered, but we still know little about the species-specific nature of responses to fire or their predictors. Here, we evaluated 26 woody species before and after a fire event in an Cerrado sensu stricto area (typical Brazilian savanna-type) in order to evaluate mortality rates and the type of resprouting (epigeal, hypogeal or epigeal + hypogeal). We evaluated the relative importance of stem diameter, height, and bark thickness as predictors of the type of post-fire resprouting, using a sequential logistic regression model (SLRM). Mortality was 4 %, while epigeal resprouting was recorded in 57 % of the individuals, hypogeal resprouting was recorded in 24 %, and epigeal +... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bark thickness; Cerrado sensu stricto; Disturbance; Fire; Resilience. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200260 |
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| Mendes, Cristina Rodrigues; UFSM; Lima, Maria da Graça de Souza; UFPel; Quadros, Fernando Luiz Ferreira de; UFSM; Abreu, Claudete Miranda; FURG; Garagorry, Fábio Cervo; UFSM. |
| A importância do fogo na origem e na manutenção das áreas de pastagens é bastante discutida. O objetivo foi verificar a influência da queima no teor de pigmentos fotossintéticos, proteína solúvel e carboidratos em gramíneas nativas de pastagem sob pastoreio rotacionado. Foram avaliadas as lâminas foliares de oito gramíneas, de pastagem natural, representantes de quatro grupos funcionais. Foram quantificados teores de pigmentos, proteínas solúveis, carboidratos solúveis, amido e açúcares redutores. A maioria das espécies sem queima teve maior teor de pigmentos. De modo geral, não houve efeito do fogo sobre a proteína solúvel, porém as espécies D. sabulorum, A. affinis e A. laevis se destacaram como o grupo de maior teor proteico solúvel dentre as espécies... |
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Palavras-chave: Carotenóide; Clorofila; Fotossíntese; Fogo; Grupos funcionais Carotenoid; Chlorophyll; Photosynthesis; Fire; Functional groups. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/8400 |
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| Oliveira,Hernani F. M. de; Aguiar,Ludmilla M.S.. |
| Fire is a common and natural event in Cerrado that can influence the composition of trees and mammals and change the entire conditions of the environment. This study was developed in a gallery forest of Distrito Federal - Brazil. Bat samplings were conducted for a total of six nights after a fire that happened on the gallery forest. Three samplings were conducted: one day, three months and seven months after fire. A total of nine mist nets (12 m x 3 m) were opened from 7pm to 1am. Captured bats were measured and identified to species. Shannon index measured the species diversity of bats in the gallery forest over time. A rarefaction curve was made to assess the estimated bat richness in each of the samplings and a chi-square test was used to check whether... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Chiroptera; Cerrado; Fire; Impact; Recovery. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000400402 |
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| Elmqvist, Thomas; Stockholm University; thomase@system.ecology.su.se; Wall, Maria; Stockholm University; fredwall@club-internet.fr; Berggren, Anna-Lena; Stockholm University; Anna-Lena.Berggren@o.lst.se; Blix, Lisa; Stockholm University; lisa.blix@lrf.se; Rinman, Ulrika; Stockholm University; ulrika.rinman@sjv.se. |
| In disturbed rain forests, large, living remnant trees may be of significant importance for postdisturbance reorganization either directly, by producing large quantities of seeds, or indirectly, by attracting vertebrate seed dispersers. In addition, remnant trees may also be important in providing a favorable microhabitat for seedlings of late-successional species. This study focused on the role of large remnant trees (> 40 cm dbh) in patterns of regeneration after cyclone and fire damage in the Tafua and Falealupo Rain Forest Preserves, Savaií, Samoa. At Tafua, 10 large trees at each of two sites (one site burned in 1990) were investigated with regard to numbers of species and densities of plants from three different size classes at... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Biological legacies; Cyclone; Fire; Rain forest; Remnant trees; Reorganization; Vertebrate dispersal.. |
| Ano: 2001 |
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| Chalmers, Nigel; Rhodes University, South Africa;; Fabricius, Christo; Rhodes University, South Africa; c.fabricius@ru.ac.za. |
| Local ecological knowledge (LEK) can shed light on ecosystem change, especially in under-researched areas such as South Africa’s Wild Coast. However, for ecosystem planning purposes, it is necessary to assess the accuracy and validity of LEK, and determine where such knowledge is situated in a community, and how evenly it is spread. Furthermore, it is relevant to ask: does LEK add value to science, and how do science and local knowledge complement one another? We assessed change in woodland and forest cover in the Nqabara Administrative Area on South Africa’s Wild Coast between 1974 and 2001. The inhabitants of Nqabara are “traditional” Xhosa-speaking people who are highly dependent on natural resources for their... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Cultivation; Fire; GIS; Land-cover change; Landscape ecology; Local ecological knowledge; Politics; Scientific knowledge; Vegetation. |
| Ano: 2007 |
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| The diversity, expressed as species richness in equal-sized samples, of wood-living beetles in successional stages of deciduous forest after forest fires approximately 100 years ago did not differ between patch sizes in this study. Thus, the crucial question for conservation is whether the lack of reduction in diversity in small patches means that a number of small patches can elevate the regional diversity as efficiently as can one larger area. In the present study, the smaller patches did not differ from larger patches in substrate availability, quality, or heterogeneity. The frequency of a group of species was measured as the number of occurrences, viz. the number of trees on which a species was found, summed over all species in the group. The number of... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Alpha (local) diversity; Beta (between-habitats) diversity; Deciduous forest; Disturbance; Diversity; Fire; Gamma (regional) diversity; Invasion; Matrix habitat; Patch size; Species-richness.. |
| Ano: 1999 |
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| Fiedler, Carl E.; College of Forestry and Conservation, University of Montana; carl.fiedler@umontana.edu; Friederici, Peter; School of Communication, Northern Arizona University; peter.friederici@nau.edu; Petruncio, Mark; Forestry Program, Yakama Nation; petruncio@yakama.com; Denton, Charles; Ecological Restoration Institute; Charles.Denton@nau.edu; Hacker, W. David; Forestry Department, New Mexico Highlands University; david_hacker@nmhu.edu. |
| There is no one-size-fits-all approach to managing frequent-fire, old-growth forests. However, there are general guidelines to follow: 1) set objectives for both structure (tree density, diameter distribution, tree species composition, spatial arrangement, amount of coarse woody debris) and function (nutrient cycling, desired tree species regeneration); 2) prioritize treatments according to ecological, economic, and social needs and risks; 3) identify the potential treatments (natural fire, prescribed fire, silvicultural cutting) that best meet the objectives and scale of the project; and 4) implement the treatment(s). We discuss each of these guidelines in this article. |
| Tipo: Peer-Reviewed article |
Palavras-chave: Fire; Forest management; Function; Silvicultural treatments; Structure; Thinning. |
| Ano: 2007 |
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| Registros recuperados: 41 | |
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