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| Registros recuperados: 39 | |
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| Duarte,Marcelo Maisonette. |
| The abundance of soil microarthropods from seven fragments of Araucaria Forest, Muitos Capões, Rio Grande do Sul, Brazil, was compared. The size of the fragments ranged from 0.25 ha to 35 ha, the two largest fragments are situated within the Aracuri Ecological Station and the remaining five are situated in a cattle ranching farm. In June 2000, three plots (10 m x 10 m) were established in the central area of each patch, and three soil cores (7 cm diameter x 6 cm deep) were taken per plot. The abundance of microarthropods in the upper six centimeters (soil + litter) varied between 63209 and 102704 ind.m-2, with oribatid mites (Acari, Cryptostigmata) being dominant in all fragments (between 46.9 % and 61.3 % of total individuals). Most microarthropod groups... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil microarthropods; Araucaria forest; Acari; Collembola; Habitat fragmentation. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000200008 |
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| Santos,André Maurício de Melo; Santos,Bráulio Almeida. |
| Edge influence, or edge effect, drives many biological changes in fragmented landscapes. This has been extensively studied in many forest ecosystems, but it remains to be described for the Brazilian Caatinga. Based on the biotic and physical conditions of the shrubby Caatinga, our prediction a priori was that this type of vegetation is free from edge influence in terms of vegetation structure and composition. We sampled shrubs, cacti and trees in twenty 200 m² plots on old edges (>60 yrs old) and interior of a 690 ha fragment, partially isolated and surrounded by Opuntia ficus-indica cacti. Plant height, stem diameter at ground level, stem density, species richness and diversity were statistically equal between edge and interior habitats. Magnitude of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shrubs; Edge effect; Habitat fragmentation; Seasonal scrub vegetation. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062008000400018 |
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| FIGUEIREDO, E. O.; PEREIRA, N. W. V.; WADT, L. H. de O.. |
| O modelo de ocupação da Amazônia, implementado nas últimas décadas, pouco considerou as especificidades dos distintos ecossistemas florestais existentes na região. Quando se considera a dimensão territorial da Amazônia e os impactos decorrentes do desflorestamento e conseqüente processo de fragmentação de florestas, o fato ganha importância global. Este trabalho faz parte do projeto "Efeito do processo de fragmentação florestal na sustentabilidade de alguns ecossistemas periféricos aos eixos rodoviários no sudeste acreano", financiado pelo Programa Nacional de Diversidade Biológica (Pronabio), e foi desenvolvido num fragmento florestal localizado à margem direita da Rodovia Federal BR-364, km 30, sentido Rio Branco/Porto Velho, no município de Rio Branco,... |
| Tipo: Séries anteriores (INFOTECA-E) |
Palavras-chave: Fragmentação florestal; Biomassa aérea; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Bosques tropicales; Biomasa aérea; Fragmentación de hábitats; Reservorios de carbono.; Floresta tropical; Ecossistema; Degradação ambiental; Impacto ambiental; Biomassa; Carbono; Estoque; Tropical forests; Habitat fragmentation; Aboveground biomass; Carbon sinks; Environmental impact.. |
| Ano: 2000 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/495836 |
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| Bouchard, Julie; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; julie.bouchard@mail.mcgill.ca; Ford, Adam T.; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; atford@gmail.com; Eigenbrod, Felix E; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; felix.eigenbrod@gmail.com; Fahrig, Lenore; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; lenore_fahrig@carleton.ca. |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Breeding dispersal; Habitat fragmentation; Highway; Migration; Movement; Road avoidance; Road mortality. |
| Ano: 2009 |
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| Simmons, Jody M; Monash University; Australian Centre for Biodiversity; jodymichellesimmons@yahoo.com.au; Sunnucks, Paul; Monash University; Australian Centre for Biodiversity; paul.sunnucks@sci.monash.edu.au; Taylor, Andrea C; Monash University; Australian Centre for Biodiversity; andrea.taylor@sci.monash.edu.au; van der Ree, Rodney; Australian Research Centre for Urban Ecology, Royal Botanic Gardens Melbourne; rvdr@unimelb.edu.au. |
| Habitat fragmentation continues to occur despite increasing evidence of its adverse effects on ecosystems. One of the major detrimental effects of roads and traffic is the creation of barriers or filters to the movement of wildlife, ultimately disconnecting some populations. Our understanding of the extent to which roads reduce the movement of biota is mostly based on field-based observational methods of inferring animal movement, and to a much smaller extent, on allele frequency-based genetic analyses. Field-based methods, as it is typically feasible to apply them, tend to be informative at fine temporal and spatial scales. Allele frequency-based genetic methods are informative at broad geographic scales but at timescales usually greater than recent... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Barrier; Dispersal; Gene flow; Genotypic analyses; Habitat fragmentation; Road ecology. |
| Ano: 2010 |
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| Martins,Aline C.; Gonçalves,Rodrigo B.; Melo,Gabriel A. R.. |
| Bee fauna and associated flora from a grassland site in Brazil, surveyed 40 and 20 years ago, were newly surveyed with comparable methodology to evaluate changes in the bee fauna of this site, considering that human population and urbanization has exponentially increased in the last 40 years. In general, bee species richness has declined in 22%, as well as their abundance. Some of the previously abundant species are now absent, including Bombus bellicosus Smith, 1879, Gaesischia fulgurans (Holmberg, 1903) and Thectochlora basiatra (Strand, 1910). No particular trend of differential decrease among either taxonomic or functional groups was observed, except for a minor increase in the proportion of oligolectic species and a 50% reduction in the number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apidae; Apoidea; Habitat fragmentation; Pollinators; Species richness; Urban environments. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200006 |
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| 浅利, 裕伸; 柳川, 久. |
| We studied the nest types used by Pteromys volans orii in two small, fragmented woods (2.1 ha and 3.1 ha) in Obihiro, Hokkaido from April 2005 to March 2006. Three nest types (cavity, nest box, drey) were used by eight flying squirrels. Each flying squirrel made use of two to eight nest-sites. The flying squirrels in our study area appear to have been restricted as to nest resources, since these woods are fragmented and small, they are surrounded by roads and fields. The preferred nests during snow-free and the snowy season were, respectively, cavity and nest box, and cavity and drey. We suggest that longer and more frequent use of nest boxes during the snow-free season might be related to rises in temperature and numbers of ectoparasites. The use of... |
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Palavras-chave: Habitat fragmentation; Nest site use; Obihiro; Pteromys volans orii; Small wood. |
| Ano: 2008 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4168 |
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| KELT,DOUGLAS A.. |
| Four recent studies on Chilean vertebrates underscore the very different effects that habitat fragmentation may have under different conditions. In southern Chile, birds exhibited significant species-area relationships, whereas the more depauperate small mammal community did not. The avifauna of highly isolated rainforest remnants in Fray Jorge National Park (IV Región) presented steeper species-area relations than those in southern Chile, reminiscent of land-bridge islands after faunal relaxation. The small mammal results were unexpected but may reflect the reduced vagility and immigration potential of this group. Additionally, the inter-remnant matrix habitat may support large populations of only some species, allowing them to capitalize on resources... |
| Tipo: Journal article |
Palavras-chave: Habitat fragmentation; Valdivian temperate rainforest; Small mammals; Birds; Conservation. |
| Ano: 2001 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000400005 |
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| Schapheer,Constanza; Lopez-Uribe,Margarita M.; Vera,Alejandro; Villagra,Cristian A.. |
| ABSTRACT Wild cockroaches are often described as abundant and diverse insects from wet tropical zones; however, they can also be found in arid and semiarid areas. It is proposed that in these drier environments cockroach survival may dependent on its tight association with native plant species. In this work, using bait trapping and active collection methods, we surveyed cockroach species along central Chile coastal scrubland; the southern limit of the semiarid Mediterranean Matorral biome in the Neotropical Region (32° S). Based on morphological and DNA barcoding methods we found that our collected cockroaches belonged to native species Moluchia brevipennis (Saussure, 1864) (Blattodea: Ectobiidae). Furthermore, thanks to field sampling, we noticed for the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Larcenists; Habitat fragmentation; Ecological interactions; South American cockroaches. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262017000200114 |
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| Milet-Pinheiro,Paulo; Schlindwein,Clemens. |
| Euglossine bees are known to be long-distance pollinators in tropical rainforests. But there is controversy concerning to the flight ranges of these bees between forest fragments. In an isolated fragment of Atlantic Rainforest in Pernambuco, NE Brazil, surrounded by sugarcane monocultures, it was examined if euglossine males leave closed rainforest to collect fragrances. In a straight-line transect leading from forest into a sugarcane plantation, euglossine males were simultaneously captured by scent baits at seven distinct points: inside the forest, forest edge, outside the forest in the sugarcane fields at distances of 10 m, 50 m, 100 m, 250 m and 500 m from the forest edge. A total of 945 euglossine bees of 16 species were recorded. The results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Rainforest; Habitat fragmentation; Northeast Brazil; Orchid bees; Scent baits. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400008 |
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| SILVEIRA, M.; AMARAL, E. F. do; GUILHERME, E.; CALOURO, A. M.; SALIMON, C. I.; MORATO, E. F.; DUARTE, A. F.; SAMPAIO, P. R. M.. |
| A Fazenda Experimental Catuaba (FEC), o antigo seringal, é um sítio consolidado para ações de ensino, pesquisa e extensão da Universidade Federal do Acre (UFAC). Ela provê suporte para atividades de grupos de pesquisa, para estudantes do ensino médio e de cursos de graduação e de pós-graduação, e para treinamentos, oficinas e cursos de capacitação, todas alinhadas com um dos principais objetivos da Convenção da Diversidade Biológica, a conservação da biodiversidade e dos serviços ecossistêmicos. Este capítulo sintetiza os resultados principais dos 30 anos de pesquisas realizadas na FEC e alerta para a diminuição do número de fragmentos e para o aumento da extensão das bordas no seu entorno e para a perda de biomassa, de biodiversidade e de serviços... |
| Tipo: Capítulo em livro técnico (INFOTECA-E) |
Palavras-chave: Restauração florestal; Fragmentação florestal; Serviços ecossistêmicos; Cadastro Ambiental Rural; Plano de Recuperação Ambiental; University education; Granjas de demostración; Restauración de bosques; Fazenda Experimental Catuaba; Universidade Federal do Acre; Biodiversidad; Investigación; Programas de extensión; Servicios ecosistémicos; Fragmentación de hábitats; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Campo Experimental; Ensino Superior; Pesquisa; Biodiversidade; Demonstration farms; Forest restoration; Biodiversity; Research; Extension programs; Ecosystem services; Habitat fragmentation. |
| Ano: 2020 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1128546 |
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| AMARAL, E. F. do; BROWN, I. F.; MELO, A. W. F. de. |
| O uso da terra na Amazônia está condicionado ao processo de fragmentação florestal. No Acre, o arco do desmatamento é constituído pela BR-364 e BR-317. Este trabalho tem como objetivo avaliar os efeitos do uso da terra nas características químicas e físicas do solo, em uma cronosseqüência de uso em uma área de grande fazendeiro no sudeste acreano. Foi conduzido na fazenda Ponteio, situada às margens da BR-317, no município de Capixaba, sendo georreferenciadas três unidades amostrais, caracterizando o gradiente de pressão antrópica: pasto, capoeira e floresta. Em cada unidade amostral foram retiradas informações sobre o histórico de uso e coletados dados referentes às seguintes características: densidade aparente, resistência do solo até 60 cm... |
| Tipo: Séries anteriores (INFOTECA-E) |
Palavras-chave: Fragmentação florestal; Arco do Desmatamento; Rodovia BR-364; Rodovia BR-317; Fazenda Ponteio; Capixapa (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Propiedades químicas del suelo; Uso de la tierra.; Fragmentación de hábitats; Propiedades fìsicas del suelo; Uso da terra; Solo; Propriedade Físico-Química; Land use; Habitat fragmentation; Soil chemical properties; Soil physical properties.. |
| Ano: 2001 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/495274 |
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| Golden Kroner, Rachel E.; Department of Environmental Science and Policy, George Mason University; Betty and Gordon Moore Center for Science, Conservation International; rachelelizabethgolden@gmail.com; Krithivasan, Roopa; Department of Geography, Clark University; rkrithivasan@clarku.edu; Mascia, Michael B.; Betty and Gordon Moore Center for Science, Conservation International; m.mascia@conservation.org. |
| Protected area downgrading, downsizing, and degazettement (PADDD) has been documented worldwide, but its impacts on biodiversity are poorly understood. To fill this knowledge gap, we reviewed historical documents to identify legal changes that altered the boundaries of Yosemite National Park. We identified two downsizes and five additions between 1905 and 1937 that reduced the size of Yosemite National Park by 30%. To examine the effects of these downsizing events on habitat fragmentation by roads, we compared protected, never-protected, and downsized lands at three spatial scales using four habitat fragmentation metrics: road density, fragment (land surrounded by roads) area-to-perimeter ratio, fragment area, and fragment density. In general, lands that... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Downsizing; Governance; Habitat fragmentation; PADDD; Protected areas; Yosemite National Park. |
| Ano: 2016 |
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| Carvalho,Naira C. de; Bordignon,Marcelo O.; Shapiro,Julie T.. |
| Several factors, such as hunting and the pet trade, are responsible for the worldwide decline of wildlife populations. In addition, fatal collisions with vehicles on highways have also taken one of the largest tolls. This study aimed to quantify the richness and abundance of vertebrate roadkill along highway MS-080 in Mato Grosso do Sul, Central-West Brazil. We compare the amount of roadkill to the distance between cities, moon phases and the flow of vehicles on the highway. Samples were collected weekly between March and September 2011, totaling 257 individuals, belonging to 32 families and 52 species, resulting in an index of 0.13 individuals hit/km. Birds were the most frequently hit taxa, followed by mammals. The most affected species was Cariama... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation; Roads; Roadkill; Urbanization; Habitat fragmentation. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000100006 |
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| Registros recuperados: 39 | |
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