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| Registros recuperados: 40 | |
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| Carrenho,Rosilaine; Gomes-da-Costa,Sandra Maria. |
| Three forest reserves, with highly degraded areas, are open to visitors in Maringá, Paraná, Brazil. Impact caused by tree cutting, heavy traffic and visitors on the establishment of arbuscular mycorrhizal fungi (AMF) was evaluated in two areas with different degradation stages of the Dr. Luis Teixeira Mendes Forest Garden, a remnant of semideciduous forest. Soil samples were removed from three locations within each area; spores were isolated from the soil by wet sieving and sucrose centrifugation and mounted on permanent slides. Spores were counted and identified taxonomically under a microscope. Diversity, dominance, equitability and similarity indexes were calculated from abundance data. The degraded area had the highest number of spores and featured... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Glomeromycetes; Forest fragmentation. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000200013 |
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| Oliveira,Carolina C. C.; Pereira,Lya C. S. M.; Lima,André; Shimabukuro,Yosio E.; Torezan,José Marcelo D.. |
| Hedgerows are linear structures found in agricultural landscapes that may facilitate dispersal of plants and animals and also serve as habitat. The aim of this study was to investigate the relationships among diversity and ecological traits of woody plants, hedgerow characteristics (size, age, and origin), and the structure of the surrounding Atlantic Forest landscape. Field data were collected from 14 hedgerows, and landscape metrics from 1000-m buffers surrounding hedgerows were recorded from a thematic map. In all sampled hedgerows, arboreal species were predominantly zoochoric and early-succession species, and hedgerow width was an important factor explaining the richness and abundance of this group of species. Connection with forest vegetation did not... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Ecological corridors; Forest fragmentation; Hedgerows; Landscape ecology; Rural landscape; Seed dispersal; Woody plants. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200239 |
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| Couto-Santos,Ana Paula Lima do; Conceição,Abel Augusto; Funch,Ligia Silveira. |
| This study aims to detect the composition, abundance patterns, and successional stage distributions exhibited by arboreal species inside and at the linear edge of a submontane seasonal forest in the Chapada Diamantina (12°28'31'S, 41°23'14'W), Bahia, Brazil. The individual plants with breast height diameters ≥5 cm were sampled in 30 quadrats (10 m × 10 m), 15 in the forest edge and 15 inside the forest. Species were classified according to successional category. Phytosociological and diversity indices were calculated. Shannon indices were compared using Hutcheson's t-test, and the remaining parameters were analyzed by ANOVA. Linear edges exerted a high impact on the floristic composition, diversity, and abundance of species, though little interference was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chapada Diamantina; Diversity; Forest fragmentation; Successional categories; Vegetation structure. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200190 |
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| Dias-Terceiro,Randolpho Gonçalves; Peixoto,Gabriela Marques; Gomes,Vitor Serrano; Menezes,Marcelo Costa; Neco,Eudécio Carvalho; Pessoa,Tainá Sherlakyann Alves; Fabricante,Juliano Ricardo; Albuquerque,Manoel Bandeira. |
| Epiphytes are common in the canopy of temperate and tropical forests, where they substantially contribute to species diversity and to key ecosystem processes. However, little is known about the effects caused by deforestation on this group of species, especially in northeastern Brazil, an area experiencing intense anthropogenic pressure. This study aimed to evaluate the effect of environmental variables on the structure of assemblies of vascular epiphytes in a fragment of open ombrophilous forest, Areia, northeastern Brazil. Sixty 10 × 10 m sampling plots were installed to cover different environments within the fragment. The relationship between environmental variables and species composition was evaluated by means of a generalized linear mixed model. The... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Brejo de altitude; Community ecology; Epiphytism; Environmental factors; Forest fragmentation. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200270 |
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| Vogel, Huilquer Francisco; Universidade Estadual do Centro-Oeste; Metri, Rafael; Universidade Estadual de Maringá; Zawadzki, Claudio Henrique; Universidade Estadual de Maringa; Moura, Maurício Osvaldo; Universidade Estadula do Centro-Oeste. |
| This study examined the structure and species richness of the avifauna in CEDETEG campus of Universidade Estadual do Centro-Oeste (Unicentro), in the urban area of Guarapuava, at Paraná State. Data were monthly taken from July 2006 to June 2007 using transects. A total of 125 bird species belonging to 42 families and 16 orders was recorded. The absence of large frugivorous species reveals the destabilization of native vegetation, evidencing that the current floristic structure does not support more specialized species. However, from the total amount of registered birds, 47 (38%) are related to the forest environment in the study area and 25 species (20%) are exclusive of this environment, pointing out the strong relevance of this campus for the... |
| Tipo: Composição de espécies |
Palavras-chave: 2.05.00.00-9 Avifauna; Forest fragmentation; Ombrophilous mixed forest Ecologia Avifauna; Forest fragmentation; Ombrophilous mixed forest. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7710 |
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| Grande, Thallita Oliveira; Alencar, Raony Macedo; Ribeiro, Paulo Pinheiro; Melo, Fabiano Rodrigues. |
| Human activities result in the formation of a mosaic of forest patches within a non-habitat matrix. The response of the local biodiversity to changes in land-use may occur at different scales. It is important to evaluate the effects of the attributes of both the patches and the surrounding landscape on the occupancy of forest patches by animal populations. Here, we assessed the predictive potential of local (basal area, tree density), patch (size, shape) and landscape scale (total area of forest, number of patches, matrix permeability, patch proximity) variables on the occupancy of forest patches by the syntopic primates Alouatta caraya, Sapajus libidinosus and Callithrix penicillata in the city of Goiânia in the Cerrado region of central Brazil. We used... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Primate syntopy patch occupancy matrix forest fragmentation playback primate syntopy; Patch occupancy; Matrix; Forest fragmentation; Playback.. |
| Ano: 2020 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/48339 |
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| Cunha, Hélida Ferreira da; UEG; Moreira, Fabiane Geralda Alves; Silva, Silvania de Sousa. |
| Roadkill of wild vertebrates along GO-060, Brazil. Roads represent an old and constant cause of accidental death of wildlife. From May 2004 to November 2005, we recorded the roadkills of vertebrates in the GO-060 road between Goiânia and Iporá. For each road-killed animal we wrote down the species and location along the road. We found 308 animals road-killed from at least 25 vertebrate species: 86% mammals, 11% birds and 3% reptiles. Tamandua tetradactyla, Cerdocyon thous and Myrmecophaga tridactyla were, in decreasing order, the species with the largest number of road-killed individuals. Among mammals, the number of road-killed individuals was not related to species weight. The number of species and road-killed animals was constant throughout the 17... |
| Tipo: Mortalidade |
Palavras-chave: 2.05.00.00-9 road mortality; Forest fragmentation; Cerrado; Brazil Ecologia road mortality; Forest fragmentation; Cerrado; Brazil. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4752 |
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| Anjos,Luiz dos. |
| Bird communities were studied in two types of fragmented habitat of Atlantic forest in the State of Paraná, southern Brazil; one consisted of forest fragments that were created as a result of human activities (forest remnants), the other consisted of a set of naturally occurring forest fragments (forest patches). Using quantitative data obtained by the point counts method in 3 forest patches and 3 forest remnants during one year, species richness and relative abundance were compared in those habitats, considering species groups according to their general feeding habits. Insectivores, omnivores, and frugivores presented similar general tendencies in both habitats (decrease of species number with decreasing size and increasing isolation of forest fragment).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Bioacoustics; Brazilian Atlantic forest; Conservation; Forest fragmentation. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200036 |
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| Medeiros,Herison; Castro,Wendeson; Salimon,Cleber Ibraim; Silva,Izaias Brasil da; Silveira,Marcos. |
| Forest fragmentation affects the structure and dynamics of plant communities, leading to biodiversity loss in forest remnants. In this paper we show that in a bamboo (Guadua weberbaueri Pilger) dominated forest fragment in southwestern Amazonia edge effect may be confounded by bamboo effect, which also occur inside the forest. We measured growth, mortality and, recruitment rate of trees with DBH ≥ 10 cm, in a fragment of bamboo dominated open forest in southwestern Amazonia, state of Acre, Brazil, in 15 plots at the forest edge and 15 plots inside the forest fragment, 500 m away from the border. Time interval between censuses was 1.8 years. The average diameter growth rate differed significantly between edge (3.82 ± 0.10 mm a-1) and interior (2.39 ± 0.18... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest fragmentation; Edge effect; Open forest with bamboo; Plant communities; Forest succession; Tropical forest dynamic. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000200029 |
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| Bordin,Sandra Mara Sabedot; Monteiro,Marcelo; Ferreira,Valéria Wesner; Lutinski,Junir Antonio; Rodrigues,Everton Nei Lopes. |
| Abstract: This study aimed to present a list of the species of frugivorous butterflies occurring in Atlantic Forests, in the Conservation Units: National Forest of Chapecó (FLONA), Ecological Station of Mata Preta (ESEC) and State Park of Araucárias (PAEAR) and adjacent forest fragments, located in the western region of the state of Santa Catarina. Three samplings were conducted between December 2017 and March 2018, totaling 24 days of collection in each sampling area. Van Someren-Rydon traps were used to capture frugivorous butterflies. There were 4,231 frugivorous butterflies belonging to four subfamilies, 12 tribes and 49 species. In all, 37 species of frugivorous butterflies were sampled in FLONA and 29 in adjacent forest fragments. In ESEC, 29 species... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation; Diversity; Ecology; Forest fragmentation; Species richness. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000400310 |
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| Torezan,José Marcelo Domingues; Souza,Rogério Fernandes de; Ruas,Paulo Maurício; Ruas,Claudete de Fátima; Camargo,Elvis Hassmann; Vanzela,André Luís Laforga. |
| RAPD was used to access the genetic variability in Aspisdosperma polyneuron, a long-lived, late-reproducing tropical tree, and highly important for the Atlantic Forest. RAPD profiles from adults (pre-fragmentation, >300 years old) and seedlings (post-fragmentation, <<50 years old) were analyzed. Results showed a decrease of genetic polymorphism of post-fragmentation cohorts in small fragments and higher genetic diversity within population. The genetic diversity distribution suggested the establishment of fragments as protected reserves, and the transference of seedlings among fragments for conservation of A. polyneuron. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspidosperma; DNA markers; Forest fragmentation; Genetic variability; Peroba-rosa; RAPD. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000200002 |
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| Mestre,Luiz Augusto Macedo; Cohn-Haft,Mario; Dias,Manoel Martins. |
| This study compared niche breath, prey size, and diet variability in two pairs of sympatric species of terrestrial insectivorous birds, each pair containing one species that can persist in small forest fragments and one that does not. The pairs were Myrmeciza ferruginea and Sclerurus rufigularis; and Formicarius colma and F. analis, respectively. The prey availability in forest fragments was also sampled and compared to the availability in continuous forests. Niche breath indices did not differ between pair members, but diet variability differed in the opposite direction from that hypothesized. Although the two bird species most vulnerable to fragmentation fed on larger prey than less vulnerable species, prey availability, including that based on prey size... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonian forests; Bird diet; Forest fragmentation; Insectivores; Formicarius colma; Formicarius analis; Myrmeciza ferruginea; Sclerurus rufigularis. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600014 |
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| Riitters, Kurt; U.S. Forest Service; kriitters@fs.fed.us; Wickham, James D; U.S. Environmental Protection Agency, National Exposure Research Laboratory; wickham.james@epa.gov; O'Neill, Robert; ; eoneill@attglobal.net; Jones, K. Bruce; U.S. Environmental Protection Agency, National Exposure Research Laboratory; jones.bruce@epa.gov; Smith, Elizabeth; U.S. Environmental Protection Agency, National Exposure Research Laboratory; smith.betsy@epa.gov. |
| We report an analysis of forest fragmentation based on 1-km resolution land-cover maps for the globe. Measurements in analysis windows from 81 km 2 (9 x 9 pixels, “small” scale) to 59,049 km 2 (243 x 243 pixels, “large” scale) were used to characterize the fragmentation around each forested pixel. We identified six categories of fragmentation (interior, perforated, edge, transitional, patch, and undetermined) from the amount of forest and its occurrence as adjacent forest pixels. Interior forest exists only at relatively small scales; at larger scales, forests are dominated by edge and patch conditions. At the smallest scale, there were significant differences in fragmentation among continents; within continents,... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Biogeography; Edge effect; Forest fragmentation; Geographic information systems; Global patterns; Land-cover map; Landscape ecology; Modeling; Perforated forest; Remote sensing; Satellite imagery; Spatial pattern. |
| Ano: 2000 |
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| Wade, Timothy G; U.S. Environmental Protection Agency, National Exposure Research Laboratory; wade.timothy@epa.gov; Riitters, Kurt; U.S. Forest Service; kriitters@fs.fed.us; Wickham, James D; U.S. Environmental Protection Agency, National Exposure Research Laboratory; wickham.james@epa.gov; Jones, K. Bruce; U.S. Environmental Protection Agency, National Exposure Research Laboratory; jones.bruce@epa.gov. |
| Because human land uses tend to expand over time, forests that share a high proportion of their borders with anthropogenic uses are at higher risk of further degradation than forests that share a high proportion of their borders with non-forest, natural land cover (e.g., wetland). Using 1-km advanced very high resolution radiometer (AVHRR) satellite-based land cover, we present a method to separate forest fragmentation into natural and anthropogenic components, and report results for all inhabited continents summarized by World Wildlife Fund biomes. Globally, over half of the temperate broadleaf and mixed forest biome and nearly one quarter of the tropical rainforest biome have been fragmented or removed by humans, as opposed to only 4% of the boreal... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Forest fragmentation; Forest pattern; Global; Risk assessment; Targeting. |
| Ano: 2003 |
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| Riitters, Kurt; U.S. Forest Service; kriitters@fs.fed.us; Wickham, James; U.S. Environmental Protection Agency; wickham.james@epamail.epa.gov; Coulston, John; North Carolina State University; jcoulston@fs.fed.us. |
| The question of incorporating road maps into U.S. national assessments of forest fragmentation has been a contentious issue, but there has not been a comparative national analysis to inform the debate. Using data and indices from previous national assessments, we compared fragmentation as calculated from high-resolution land-cover maps alone (Method 1) and after superimposing detailed road maps (Method 2). There was more overall fragmentation with Method 2. However, because roads were often adjacent to other nonforest land cover, Method 1 typically detected > 80% of the forest edge and > 88% of the fragmentation of core, i.e., intact, forest that was detected by Method 2. Indices based on individual patch size changed much more for Method 2;... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: United States; Ecological assessments; Land-cover maps; Landscape patterns; Road maps; Forest fragmentation. |
| Ano: 2004 |
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| Registros recuperados: 40 | |
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