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Tipo do documento Info:eu-repo/semantics/article (51) Article / Letter to the editor (10) Part of book or chapter of book (5) Comunicado Técnico (INFOTECA-E) (2) Info:eu-repo/semantics/other (1) Info:eu-repo/semantics/report (1) Journal article (1) Mais... Ano 2018 (3) 2017 (2) 2015 (1) 2014 (1) 2013 (5) 2012 (4) 2011 (5) 2010 (4) 2009 (11) 2008 (11) 2007 (4) 2006 (2) 2005 (2) 2004 (3) 2003 (3) 2002 (4) 2000 (1) 1999 (1) 1997 (2) 1995 (2) Mais... País Brazil (50) Netherlands (15) Argentina (4) Chile (1) Japan (1) Mexico (1) Mais... Idioma Inglês (32) Português (20) Espanhol (5)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 41 Primeira ... 1 2 3 ... Última Floristic and vegetation structure of a granitic grassland in Southern Brazil 88 Ferreira,Pedro Maria de Abreu; Müller,Sandra Cristina; Boldrini,Ilsi Iob; Eggers,Lilian. A floristic and structural survey of a natural grassland community was conducted on Morro do Osso, a granitic hill in Porto Alegre, RS, Brazil. Structural data were surveyed in 39 one square meter plots placed over two major grassland areas. An accidental fire has occurred in one of the areas approximately one year prior to our survey, leading to further analysis of parameters differences between sites. The floristic list contains 282 species, whereas the structural survey has found 161 species. Families with highest accumulated importance values were Poaceae, Asteraceae and Fabaceae. The diversity and evenness indexes were 4.51 nats ind-1 and 0.86, respectively. Cluster analysis denoted two groups coinciding with the areas distinguished by the fire... Tipo: Info:eu-repo/semantics/article Palavras-chave: Campos; Diversity; Fire; Relict vegetation; Similarity; Threatened species. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000100004 Soil Biological, Chemical, and Physical Properties After a Wildfire Event in a Eucalyptus Forest in the Pampa Biome 90 Santana,Natielo Almeida; Morales,Cedinara Arruda Santana; Silva,Diego Armando Amaro da; Antoniolli,Zaida Inês; Jacques,Rodrigo Josemar Seminoti. ABSTRACT Wildfire events cause considerable environmental disturbance but few studies have examined changes in soil properties due to fire. This study aimed to assess the effect of a wildfire event on chemical, physical, and biological properties of the soil in a eucalyptus forest in the Pampa biome. Part of a seven-year-old eucalyptus forest was affected by a wildfire event that lasted for two days. Soil and plant litter sampling was performed in three areas: in the forest that was not affected by the fire, in the forest affected by it, and in an adjacent natural pasture area (the original vegetation). Seven samples were collected from the 0.00-0.05 and 0.05-0.20 m layers of each plot for biological analysis, and three samples were collected for chemical... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fire; Environmental disturbance; Soil quality; Soil diversity. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100417 Fire regimen and spread of plants naturalized in central Chile 97 CONTRERAS,TOMÁS E; FIGUEROA,JAVIER A; ABARCA,LUIS; CASTRO,SERGIO A. Setting fires is an old practice of land management in the Mediterranean region of central Chile. Fire in the region is currently of predominantly human origin and previously published material suggests that the scheduling of these activities is associated with the spread of naturalized exotic species. Research into the effects of fire on both native and exotic Mediterranean vegetation in central Chile has increased notably over recent years. The objective of our review is to highlight new knowledge in this area of research from the last 30 years and to contribute to systematization and an explicit conceptual model which takes into account the effect of a fire regimen on the spread of exotic plants and the mechanisms involved. We begin with analyses of the... Tipo: Journal article Palavras-chave: Central Chile; Exotic plant; Fire; Germination; Naturalized plant. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000300001 Fire effects on a Spartina densiflora salt marsh in the floodplain of the Paraná River, Argentina 97 MADANES,NORA; FISCHER,SYLVIA; VICARI,RICARDO. We studied the effects of fire on the structural attributes of a Spartina densiflora salt marsh. The study was carried out from November 1995, spring (N95S) to December 1996, late spring (D96LS). In November 1995, we installed 37 permanent plots. In January 1996, 32 of the plots were accidentally burned (B) and the remaining were not burned (NB). Vegetation on each plot was sampled seasonally, plant species were identified and cover-abundance was estimated. We analyzed and compared seasonal variations in plant species richness, diversity, composition and cover-abundance in burned and non-burned plots. In addition, we analyzed variations in biological types (forbs, graminoids) and types of life cycles (annuals, perennials) in B and NB plots before and after... Tipo: Journal article Palavras-chave: Spartina densiflora; Salt-marsh; Fire; Community. Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000200005 The effect of heat and smoke on the emergence of exotic and native seedlings in a Mediterranean fire-free matorral of central Chile 97 FIGUEROA,JAVIER A; CAVIERES,LOHENGRIN A. We studied the effect of heat shock and wood-fueled smoke on the emergence of native and exotic plant species in soil samples obtained in an evergreen matorral of central Chile that has been free of fire for decades. It is located on the eastern foothills of the Andes Range in San Carlos de Apoquindo. Immediately after collection samples were dried and stored under laboratory conditions. For each two transect, ten samples were randomly chosen, and one of the following treatments was applied: (1) heat-shock treatment, (2) plant-produced smoke treatment, (3) combined heat-and-smoke treatment, and (4) control, corresponding to samples not subjected to treatment. Twenty-seven species, representing 13 families, emerged from the soil samples. The most abundant... Tipo: Journal article Palavras-chave: Central Chile; Exotic herb; Fire; Heat-shock; Smoke. Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000100008 ผลกระทบของไฟป่าต่อดินและพืช ณ ท้องที่ดอยอ่างขาง: ผลในปีแรก 106 Sirirat Boonplian. Thesis (M.Sc. in Forestry) Tipo: PhysicalObject Palavras-chave: Plant; Soil; Fire; Doi Angkhang; พืช; ดิน; ไฟป่า; ผลกระทบ; ดอยอ่างขาง. Ano: 1985 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5465 Changes in soil organic carbon after burning in a forest-savanna edge 109 Sánchez Ojeda,Federico; Armenteras Pascual,Dolors. Abstract Soils are one of the largest terrestrial pools of carbon, yet there is still little understanding of spatial variability for ecosystems in the tropics. Fire plays an important role in Neotropical savannas ecosystems and significantly contribute to global greenhouse gas (GHG) fluxes. Nevertheless, the impacts of burning on soil carbon is still uncertain in Latin America. We compared soil organic carbon (SOC) in the first 20 cm depth in savannas in pre and post fire conditions along a forests-savanna edge typically present in these landscapes of the northern South America. We established 8 transects of 20 m longitude along the border with 1m2 plots sampled every 4 m. SOC pre-disturbance was on average 1.794 (±SE 0.043) and the minimum value found... Tipo: Info:eu-repo/semantics/article Palavras-chave: SOC; Fire; Edge influence; Disturbance; Carbon cycl; Colombia. Ano: 2017 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000400519 Post-fire resprouting strategies of woody vegetation in the Brazilian savanna 39 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 Key factors affecting seed germination of Copaifera langsdorffii, a Neotropical tree 39 Souza,Matheus Lopes; Silva,Dávila Regina Pacheco; Fantecelle,Laura Bubantz; Lemos Filho,José Pires de. In natural conditions biotic and abiotic factors interact, synergistically affecting seed germination. In this study, we experimentally simulated natural conditions that occur during seed dispersal that can affect the germination of Copaifera langsdorffii. Specifically we evaluated the effect of aril removal by different dispersal agents (birds and ants) and fire on germination. The seeds were submitted to the following treatments: Control (seeds placed to germinate with aril intact); Acid (simulation of passage through the digestive tract of a bird); Aril removal (simulation of aril removed by ants); Fire (seeds exposed to fire). Germination percentage and time varied among treatments (X²=89.735, P<0.001; X²=16.225, P<0.001, respectively). None of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Copaifera langsdorffii; Fire; Plant-disperser interaction; Seed germination. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400473 How does resprouting response differ among three species of savanna trees and in relation to plant size? 39 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 Structural assessment of a population of Anacardium humile subjected to fire during different periods of the year 39 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 Variation in aboveground biomass and necromass of two invasive species in the Atlantic rainforest, southeast Brazil 39 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 Does fire determine distinct floristic composition of two Cerrado savanna communities on different substrates? 39 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 Disturbance as a factor in breaking dormancy and enhancing invasiveness of African grasses in a Neotropical Savanna 39 Gorgone-Barbosa,Elizabeth; Pivello,Vânia R.; Baeza,M. Jaime; Fidelis,Alessandra. The Cerrado is threatened by wildfires and invasive species. We aimed to evaluate in laboratory conditions whether temperature fluctuation at the soil surface, resulting from the absence of vegetation due to fire, can affect the germination of Urochloa decumbens and U. brizantha, two invasive African grasses. Seeds of both species were submitted to simulations: 1) temperature during fire at 1cm belowground (F); 2) temperature fluctuation at 1cm belowground without vegetation cover for a month (TF); 3) (F) + (TF); 4) control at 25ºC. After treatments, seeds were put to germinate at 25ºC for 40 days. We had four replicates per treatment and three temporal replicates. We compared germination percentage and the mean germination time among treatments using... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Fire; Germination percentage; Invasive species; Physiological dormancy; Seed dormancy; Temperature fluctuation; Urochloa brizantha; Urochloa decumbens. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100131 Management techniques for the control of Melinis minutiflora P. Beauv. (molasses grass): ten years of research on an invasive grass species in the Brazilian Cerrado 39 Martins,Carlos Romero; Hay,John Du Vall; Scaléa,Marcio; Malaquias,Juaci Vitória. ABSTRACT The invasion of exotic species is considered to be a major threat to the preservation of biodiversity. In the Parque Nacional de Brasília (National Park of Brasília), the invasive Melinis minutiflora (molasses grass) occupies more than 10 % of the area of the park. The present, long-term, study compared two treatments of exposure to molasses grass: 1) fire and 2) integrated management (fire + herbicide sprays + manual removal). The aerial biomass of molasses grass in the experimental area initially represented ca. 55 % of the total aerial biomass, a percentage that apparently did not influence native plant species richness at this site. Fire alone was not sufficient to control molasses grass, which attained its pre-treatment biomass values after... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fire; Glyphosate; Ground layer biomass and species richness; Protected areas; Recolonization. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400546 Woody vegetation dynamics in a floodplain campo de murundus in central Brazil 39 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 Spatial patterns of two co-occurring savanna and forest tree species in a dense fire-protected savanna fragment 39 Costa,Rafael Carvalho da; Santos,Flavio Antonio Maës dos. ABSTRACT Savanna-forest transition under fire-exclusion could be explained by differential competitive performance of savanna and forest species under shading/fire-exclusion. Aiming to understand strategies related to either habitat affinity, we investigated spatial patterns of a savanna and a forest species in a fire-protected savanna. We predicted that: savanna species would have lower abundance than the forest species due to a restriction in the number of open microsites; segregation of size classes and a trend from clumping to regularity with size for forest species due to absence of microsite limitation and intra-specifc competition; and spatial association and increasing clustering with size for savanna species due to microsite limitation. To test... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Competition; Fire; Microsite limitation; Recruitment; SADIE; Savanna; Spatial patterns. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000400577 Influência da queima no teor de pigmentos, proteína solúvel e carboidratos em gramíneas de pastagens naturais - doi: 10.4025/actascianimsci.v32i3.8400 2 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... 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 Effect of high temperature on germination of four legumes from a forest-grassland mosaic in Southern Brazil 49 Silveira,Fernanda Schmidt; Overbeck,Gerhard Ernst. Passage of a fire can break dormancy of the seeds of many plant species in fire-prone ecosystems. This response to fire is especially well known for the Fabaceae family, but has been poorly studied in Southern Brazil. We collected seeds of four Fabaceae species present in grasslands-forest mosaics of Southern Brazil: Mimosa bimucronata, Desmodium barbatum, Sesbania virgata and Collaea stenophylla. Seeds were exposed to different heat treatments (exposure to 60° and 80 °C for 5 minutes, to 100 °C for 2 minutes, control without heat treatment); not all species were tested in all treatments. After the treatment, the seeds were kept in a germination chamber with a light period of 12/12 hours and temperature of 25 °C. Germinated seeds were counted every 2 days.... Tipo: Info:eu-repo/semantics/other Palavras-chave: Campos Sulinos; Ecophysiology; Fabaceae; Fire; Grassland; Heat shock. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000200331 The response of bats (Mammalia: Chiroptera) to an incidental fire on a gallery forest at a Neotropical savanna 49 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 Registros recuperados: 41 Primeira ... 1 2 3 ... Última

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