Anthropogenic Disturbance
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Anthropogenic Disturbances Affect the Relationship Between Spectral Indices and the Biometric Variables of Brazilian Savannas
ABSTRACT According to previous studies involving biometric variables modeling using remote sensing (RS), data did not consider the effects of anthropogenic disturbance as relevant factor. The main objective of this study was to model aboveground biomass (AGB) and total wood volume (TWV) of Brazilian Savanna biome using vegetation indices (VI) from LANDSAT 5
Floresta Ambient.. Publicado em: 05/09/2019
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2. What explains the variation on the regenerative component dynamics of Araucaria Forests in southern Brazil?
ABSTRACT: The natural regeneration process is essential for forest maintenance since it is critical for establishing new tree individuals. This study aimed to improve the understanding of the regenerative component dynamics of Araucaria Forests in Southern Brazil. We investigated the effects of climate, light, tree component structure and anthropogenic distu
Sci. agric. (Piracicaba, Braz.). Publicado em: 20/05/2019
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3. Organic Carbon and Physical Properties in Sandy Soil after Conversion from Degraded Pasture to Eucalyptus in the Brazilian Cerrado
ABSTRACT Soil is currently seen as the most relevant carbon sink and the most effective carbon stabilizer. In contrast, agriculture is the second largest C emitter, after burning of fossil fuels. This organic carbon (OC) introduced into the soil, mainly via organic matter (OM), is essential for several soil properties and plays an extremely important role in
Rev. Bras. Ciênc. Solo. Publicado em: 22/06/2017
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4. Do the structures of macaw palm fruit protect seeds in a fire-prone environment?
ABSTRACT Fire is an abiotic disturbance that regulates vegetation structure and biodiversity. Some plant species have adapted to fire prone environments by evolving protective structures. Acrocomia aculeata (macaw palm) is widely distributed throughout tropical America, and is found in environments continuously influenced by anthropogenic fire. We aimed to d
Acta Bot. Bras.. Publicado em: 27/10/2016
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5. Impact of Site Conditions Changes on the Tree Ring Records Suitability as Climate Proxies in the Brazilian Amazon
ABSTRACT The increment zones width in the xylem of Swietenia macrophylla King was investigated by dendrochronological methods in an undisturbed and a strongly disturbed tropical site near Aripuanã, Mato Grosso, Brazil (10°09’ S, 59°26’W). The study aimed to assess the impact of forest disturbance on the relationship between precipitation and the cambi
Floresta Ambient.. Publicado em: 03/05/2016
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6. Structure and floristic diversity of remnant semideciduous forest under varying levels of disturbance
The perturbation of Neotropical forests generates large disturbances in biological communities. The species that suffer least from the resulting habitat fragmentation are the pioneers, because they possess greater ability to inhabit disturbed environments. Therefore, it is expected that species diversity will be greater in areas subjected to intermediate dis
Acta Bot. Bras.. Publicado em: 2014-12
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7. Hemiodus langeanii (Characiformes: Hemiodontidae), a new species from rio Amana, rio Maués-Açú drainage, Amazon basin, Brazil
Hemiodus langeanii, espécie nova, é descrita com base em 20 espécimes coletados no rio Amana, um tributário do rio Maués-Açú na drenagem do rio Amazonas, na Amazônia Brasileira. O táxon novo pode ser diferenciado de seus congêneres devido ao seu corpo muito alto (27,1-35,3%, média 32,3% CP, vs. 18,8-28,5% nas demais espécies). A espécie nova apr
Neotropical Ichthyology. Publicado em: 2012
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8. Regeneração de espécies arbóreas em floresta impactada
This study aimed to investigate aspects of population ecology of six tree species in two areas with different historical preservation: Mata São Francisco State Park (MSFSP), Santa Mariana-Cornelio Procópio, PR, Brazil (23º 15 S and 50º 45 W, central point of fragment), who suffered exploration anthropogenic, and Mata dos Godoy State Park (MGSP) (23º 27
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2011
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9. The effects of four types of anthropogenic disturbances on composition and abundance of terrestrial isopods (Isopoda: Oniscidea)
The Brazilian Atlantic Forest is currently reduced to about 12% of its original range. Among the components that make up its great diversity, there are species with the potential to be bioindicators, which can be very important for conservation-oriented studies. This study compares the species composition, abundance and sex ratio of terrestrial isopods in si
Zoologia (Curitiba). Publicado em: 2011-02
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10. Estrutura e riqueza de hepáticas (Marchantiophyta) epifíticas em áreas fragmentadas de Cerrado com borda natural e antrópica / Estrutura e riqueza de hepáticas (Marchantiophyta) epifíticas em áreas fragmentadas de Cerrado com borda natural e antrópica / Structure and richness of the epiphytic liverworts (Marchantiophyta) in fragmented areas of Cerrado with natural edge and anthropogenic / Structure and richness of the epiphytic liverworts (Marchantiophyta) in fragmented areas of Cerrado with natural edge and anthropogenic
The damage caused by the proliferation of edge in forest cover, referred to as edge effects are extensive, may occur over large spatial scales influencing species composition, structure and ecological processes in boundaries of ecosystems. However, studies have shown highly variable response patterns of the taxonomic group studied in relation to the landscap
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/06/2010
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11. Estudo sobre a evolução do aporte natural e antrópico de matéria orgânica para sedimentos de um sistema estuarino- lagunar tropical (Mundaú-Manguaba, Alagoas) utilizando lipídios como marcadores moleculares / Study on the evolution of natural and anthropogenic inputs of organic matter for sediments of a tropical lagoon-estuarine system (Mundaú-Manguaba, Alagoas) using lipids as molecular markers
This thesis presents a study on the accumulation of organic matter in the sediments of the complex estuarine lagoon Mundaú Manguaba (CELMM) using lipids (fatty acids, sterols and linear alcohols) as molecular markers to evaluate the sources (natural and anthropogenic) and spatial and temporal variation in the composition of sedimentary organic matter, as we
Publicado em: 2010
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12. Terrestrial arthropods as biological indicators of anthropogenic disturbance / Artropodes como indicadores biologicos de pertubação antropica
In this study, the responses of terrestrial arthropods to different types of anthropogenic disturbance were examined, aiming to select and test ecological indicators. Ten groups of terrestrial arthropods were selected and sampled in an Atlantic Forest reserve with two sites with contrasting histories of disturbance, one with history of selective logging (pre
Publicado em: 2009