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Analysis of grassland degradation in Zona da Mata, MG, Brazil, based on NDVI time series data with the integration of phenological metrics. Repositório Alice
HOTT, M. C.; CARVALHO, L. M. T.; ANTURNES, M. A. H.; RESENDE, J. C. de; ROCHA, W. S. D. da.
Abstract: There is currently a lot of interest in determining the state of Brazilian grasslands. Governmental actions and programs have recently been implemented for grassland recovery in Brazilian states, with the aim of improving production systems and socioeconomic indicators. The aim of this study is to evaluate the vegetative growth, temporal vigor, and long-term scenarios for the grasslands in Zona da Mata, Minas Gerais State, Brazil, by integrating phenological metrics. We used metrics derived from the normalized difference vegetation index (NDVI) time series from moderate resolution imaging spectroradiometer (MODIS) data, which were analyzed in a geographic information system (GIS), using multicriteria analysis, the analytical hierarchy process,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Time series; NDVI; Phenological metrics; Remote sensing; Degradation; Grasslands.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118582
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Avaliação de sensor multiespectral em mapeamentos da infestação de pastagens naturais pelo capim-annoni. Repositório Alice
NEVES, M. C.; PEREZ, N. B.; LUIZ, A. J. B.; DEIBLER, A.; PINHO, L. B. de.
Resumo: O emprego de imagens adquiridas por aeronaves remotamente pilotadas na agricultura é uma alternativa cada vez mais frequente. Este trabalho tem como objetivo avaliar o emprego de um sensor desenvolvido para estes equipamentos no mapeamento e quantificação da infestação de pastagens naturais do sul do Brasil pelo capim-annoni (Eragrostis plana Nees). Foram analisadas as correlações entre variáveis biométricas (relacionadas à biomassa e níveis de infestação em pastagens) e respostas espectrais (cinco bandas do sensor e dois índices obtidos pela composição de bandas). Várias correlações foram estatisticamente significativas e a maior delas mostrou que a reflectância na banda correspondente à borda do vermelho é inversamente proporcional ao nível de...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Aeronaves remotamente pilotadas; Plantas invasoras; Banda borda do vermelho; Remotely piloted aircrafts; Invasive plant; Red edge band; Reconhecimento Aéreo; Aerofotogrametria; Pastagem; Capim Annoni; Erva Daninha; Grasslands; Invasive species; Multispectral imagery.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1117339
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Biomass components of Pennisetum purpureum cv. Roxo managed at different growth ages and seasons. Repositório Alice
MARANHÃO, T. D.; CÂNDIDO, M. J. D.; LOPES, M. N.; POMPEU, R. C. F. F.; CARNEIRO, M. S. de S.; FURTADO, R. N.; SILVA, R. R. da; SILVEIRA, F. G. A. da.
Abstract: This study was carried out aiming to evaluate the biomass components of elephant grass cv. Roxo at seven growth ages, during rainy, transition and dry seasons. A completely randomized design was adopted with a split plot arrangement over time. The treatments consisted of seven growth ages (9, 18, 27, 36, 45, 54 and 63) and three seasons (rainy, transition and dry). The variables green forage biomass, dead forage biomass, green stem biomass and green leaf blade biomass showed positive linear responses to age and had their magnitude influenced by the evaluated seasons. The live/dead material ratio showed a decreasing linear response as a function of age. The leaf blade/stem ratio showed a negative linear adjustment in the rainy season, reaching a...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Grassland management; Growth stages; Seasonality; Estacionalidade; Estrutura do dossel; Capim Roxo; Estação seca; Manejo de pastagem; Pennisetum Purpureum; Capim Elefante; Forrageira Tropical; Gramínea Forrageira; Crescimento; Caule; Biomass; Canopy; Dry season; Grasslands; Leaves; Stems; Wet season; Pasture management.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1094388
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Biomass Partitioning Following Defoliation of Annual and Perennial Mediterranean Grasses Ecology and Society
Gutman, Mario; Agricultural Research Organization; mgutman@shani.net; Noy-Meir, Imanuel; Hebrew University of Jerusalem; noymeir@agri.huji.ac.il; Pluda, Daniel C; Volcani Center;; Seligman, No'am; Volcani Center; noamseli@netvision.net.il; Rothman, Steven; ;; Sternberg, Marcelo; Tel Aviv University; MarceloS@tauex.tau.ac.il.
A two-year experiment was conducted in northeastern Israel to study the effects of various defoliation regimes on biomass partitioning between vegetative and reproductive structures in a perennial and an annual Mediterranean grass. Greater insight into the mechanisms regulating biomass partitioning after defoliation enables ecologists and rangeland managers to interpret and predict population and community dynamics in Mediterranean grasslands more efficiently. Two typical Mediterranean grasses, Triticum dicoccoides, an annual species, and Hordeum bulbosum, a perennial species, were grown in containers in the open. They were subjected to a series of defoliation treatments that comprised three clipping frequencies and three clipping heights in a full...
Tipo: Peer-Reviewed Reports Palavras-chave: Annual vs. perennial grasses; Biomass partitioning; Defoliation treatments; Grasslands; Grazing response; Hordeum bulbosum; Israel; Mediterranean; Reproductive effort; Triticum dicoccoides; Vegetative vs. reproductive structures..
Ano: 2001
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Brazilian tropical grassland ecosystems: distribution and research advances. Repositório Alice
GUARDA, V. D. A.; GUARDA, R. D. A..
A few decades ago we sought the understanding of the functioning of Brazilian ecosystems. During these years, changes in the way land use were influenced primarily by economic issues involving the process of valuation of land in different regions. Furthermore, developments in research have provided productive increments that were well characterized in some phases. This paper aims to trace a brief history of the distribution of grassland ecosystems in Brazil and show how it has been the advances in research on forages and pastures in the country, pointing its evolution, transition times and trends. Moreover, it purports to show a perspective of the dynamics of occupation of Brazilian territory by these ecosystems. The information is presented on three...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Cerrado; Manejo; Pastagem; Pastejo; Ecossistema; Grazing management; Grasslands; Agroecosystems.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/983390
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Cambios en la vegetacion de un campo abandonado despues de un cultivo de trigo. Repositório Alice
BOCCANELLI, S. I.; PIRE, E. F.; TORRES, P. S.; LEWIS, J. P..
La vegetacion pristina de los campos altos del sur de Santa Fe (Argentina) son distintos tipos de flechillares caracterizados por la abundancia de varias especies del genero Stipa. Cuando un campo agricola se abandona suele revertir a las comunidades pristinas. El objeto de este trabajo es analizar los diez primeros anos de la sucesion secundaria de un campo sometido a agricultura durante largo tiempo que se abandono despues de un cultivo de trigo (Triticum aestivum). En el primer ano aparece trigo acompanado de malezas anuales (Chenopodium album y Portulaca oleracea); despues del primer ano una parcela fue colonizada por Baccharis salicifolia y las otras por Carduus acanthoides, Cerastium glomeratum, Ammi majus, etc. Los ultimos anos constituyen una etapa...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Pampa; Pradera; Triticum aestivum; Sucesion; Diversidad; Dinamica de la vegetacion; Grasslands; Succession; Diversity; Vegetation dynamics.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/87005
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Características da bacia hidrográfica do Rio Ivinhema. Repositório Alice
POTT, A.; SILVA, J. dos S. V. da; GOMES, E. L..
Resumo: A Unidade de Planejamento e Gerenciamento (UPG) do Rio Ivinhema faz parte do Corredor Ecológico Pantanal-Serra da Bodoquena-Rio Paraná. São brevemente descritos composição municipal, rede fluvial, geologia, geomorfologia, solos, qualidade de água e vulnerabilidade ambiental, com ênfase em vegetação e uso do solo. A vegetação é de transição Cerrado-Mata Atlântica (Floresta Estacional Semidecidual) e florestas e campos inundáveis de planície de inundação. Os tipos de vegetação mais ameaçados são áreas úmidas como os buritizais (Mauritia flexuosa), não respeitados como Áreas de Preservação Permanente, as florestas, e os campos naturais, cujos escassos remanescentes também deveriam ser preservados.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Buritizal; Campos naturais; Mata Atlântica; Bacia hidrográfica; Cerrado; Várzea; Floodplains; Grasslands; Wetlands; Mauritia.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1001229
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Contribution of Additive and Dominance Effects on Agronomical and Nutritional Traits, and Multivariate Selection on Urochloa spp. Hybrids. Repositório Alice
MATIAS, F. I.; BARRIOS, S. C. L.; BEARARI, L. M.; MEIRELES, K. G. X.; MATEUS, R. G.; AMARAL, P. N. C. do; ALVES, G. F.; VALLE, C. B. do; FRITSCHE-NETO, R..
A tropical forage breeding program contains several peculiarities, especially when it involves polyploid species and facultative apomixis. Urochloa spp. are excellent perennial forages, and the identification of superior genotypes depends on the selection of many characteristics under complex genetic control, with high cost and time-consuming evaluation. Therefore, the use of tools such as multivariate analysis and diallel analyses could contribute to improving the efficiency of breeding programs. Thus, the objectives were to estimate (i) the contribution of additive and nonadditive effects on agronomical and nutritional traits in a population of interspecific hybrids of Urochloa spp., originated from a partial diallel between five apomictic and four...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Forrageira Tropical; Apomixia; Gramínea Perene; Controle Genético; Hibrido; Cruzamento Animal; Livestock; Grasslands; Breeding; Urochloa; Perennials; Polyploidy; Hybrids.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1106550
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Current and future land use and land cover scenarios in the Arroio Marrecas watershed AGRIAMBI
Tornquist,Carlos G.; Silva,Diego S. da.
ABSTRACT This study evaluated historic land use and land cover changes in the Arroio Marrecas watershed (Caxias do Sul, Rio Grande do Sul state of Brazil) and simulated future land use scenarios until 2034. Spatial and temporal simulations were conducted with the Conversion of Land Use and its Effects - Small Regional Extent (CLUE-S) model. Three land use scenarios were developed to include public policies and agricultural trends in the study region for 20 years (2015-2034). Geospatial analysis of different land uses showed that areas that were originally covered grasslands and forests decreased, which can be attributed to the expansion of intensive agricultural uses, such as fruit farming/forestry and urbanization. The reallocation dynamics of land use...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Geospatial analysis; Environmental modeling; CLUE-S; Grasslands.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000300215
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Effects of flooding on the spatial distribution of soil seed and spore banks of native grasslands of the Pantanal wetland Acta Botanica
Oliveira,Patricia Carla de; Torezan,José Marcelo Domingues; Cunha,Catia Nunes da.
ABSTRACTTo better understand the role that flooding plays in shaping plant communities of native floodable grasslands of the Pantanal and to characterize the spatial distribution of plants, we present the results of a survey of soil seed and spore banks using the seedling emergence method. We hypothesized that terrain subjected to the deepest and longest flooding should have higher propagule abundance and richness. The species composition and distribution of seeds and spores in the soil were assessed at five sites using three sampling positions at each according to inundation intensity. In each sample position 2cm-thick soil samples were collected in quadrats to a depth of 10cm. Litter was also collected as an independent layer. Sample monitoring in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eleocharis minima; Eleocharis plicarhachis; Flooding; Grasslands; Isoetes pedersenii; Panicum laxum; Rotala mexicana; Sagittaria guayanensis; Soil seed and spore bank; Spatial distribution.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300400
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Estimativa de expoentes de Hurst para séries temporais de imagens NDVI / MODIS em regiões de pastagens da Zona da Mata de Minas Gerais. Repositório Alice
HOTT, M. C.; CARVALHO, L. M. T. de; ANTUNES, M. A. H.; ALVES, H. M. R.; ROCHA, W. S. D. da.
The Zona da Mata region in Minas Gerais State is configured in a traditional dairy production chain, whose grasslands have subtle dynamics in their phenology, and currently there is a strong concern regarding degradation and vegetative development trends. The Hurst exponents (H) are a potential tool to describe the evolution scale of time series, sensitive to short- and long-term memory. This study was aimed at developing an algorithm in the GIS that presents reliable results of the Hurst exponents for NDVI from MODIS imagery, using binary blocks method applied to R/S analysis (range rescaled) in the Gretl, an econometrics and time series software. We produced H values identical to those estimated H for time series of pixels extracted from the satellite...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Serie temporal; Hurst exponents; Expoentes de hurst; Pastagem; Grasslands; Moderate resolution imaging spectroradiometer.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1041272
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Factors influencing seed germination in Cerrado grasses Acta Botanica
Kolb,Rosana Marta; Pilon,Natashi Aparecida Lima; Durigan,Giselda.
Few studies address the ecology of herbs of Cerrado grasslands, which are ecosystems where the long dry season, high temperatures, insolation, fire and invasive grasses greatly influencing germination and the establishment of plants. We assessed germination of 13 species of Poaceae from Cerrado grasslands under nursery conditions or in germination chambers, the latter with i) recently collected seeds and seeds after six months storage, ii) under constant and alternating temperatures, and iii) in the presence and absence of light. Germinability, mean germination time (MGT) and required light were quantified to elucidate factors involved in successful germination. Germinability was low for most grasses, probably because of low seed viability. For most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conservation; Grasslands; Poaceae; Savanna; Seed storage; Seed viability.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100087
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Ferramentas para plano de manejo que visem a conservação das pastagens nativas associada com a introdução de gramíneas exóticas no Pantanal. Infoteca-e
SANTOS, S. A.; CARDOSO, E. L..
A presente publicação visa apresentar informações e ferramentas que possam subsidiar a definição de estratégias de manejo que proporcionem a conservação das pastagens nativas, associada com a introdução de gramíneas exóticas, e que permitam a manutenção da sustentabilidade dos sistemas de produção no Pantanal.
Tipo: Documentos (INFOTECA-E) Palavras-chave: Pastagem nativa; Conservação; Pastures; Pasture grasses; Grasslands.
Ano: 2017 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/1071787
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Fitofisionomias do bioma cerrado. Repositório Alice
RIBEIRO, J. F.; WALTER, B. M. T..
Os biomas do Brasil; O bioma cerrado; Origem das formacoes florestais; Origem das formacoes savanicas e campestres; Cerrado: definicao de termos; Trabalhos abordando terminologia fitofisionomica; Padronizacao de termos fitofisionomicos; Principais tipos fitofisionomicos do cerrado; Formacoes florestais; Mata ciliar; Mata de galeria; Mata seca; Cerradao; Formacoes savanicas; Cerrado sentido estrito; Parque do cerrado; Palmeiral; Vereda; Formacoes campestres; Campo sujo; Campo rupestre; Campo limpo; Chave de identificacao dos tipos fitofisionomicos do cerrado.
Tipo: Capítulo em livro científico (ALICE) Palavras-chave: Cerrado; Floresta; Savana; Mata ciliar; Floresta decidua; Cerradao; Palmeira; Campo; Vereda; Terminologia; Brasil; Forests; Savannas; Riparian vegetation; Deciduous forests; Palmae; Grasslands; Terminology; Brazil.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/554094
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Florística e aspectos fitogeográficos dos "campos" do parque estadual do Jaraguá, São Paulo, Brasil. Repositório Alice
BERALDO, K.; FRANÇA, V. G.; HEIDEN, G.; PIRANI, J. R..
bitstream/item/182862/1/Gustavo-Heiden-Beraldo.et.al.2018-Incluido.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Atlantic Forest Domain; Conservation; Floristics; Savanna; Grasslands.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1095603
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Genetic diversity and population structure of naturally rare Calibrachoa species with small distribution in southern Brazil Genet. Mol. Biol.
John,Ana Laura de Wallau; Mäder,Geraldo; Fregonezi,Jeferson N.; Freitas,Loreta B..
Abstract Calibrachoa is a South-American genus comprising 27 species, several considered endemic or rare; few were subjects in genetic studies. We attempted to generate new data about the phylogenetically related and rare species C. eglandulata, C. sendtneriana, C. serrulata, and C. spathulata concerning their genetic diversity and population structure, which, coupled with their known restricted distribution, could help access their conservation status and contribute to the study of the Brazilian biodiversity. We sequenced 88 individuals for plastid intergenic spacers and genotyped 186 individuals for five microsatellite loci. Compared among each other, C. sendtneriana and C. serrulata presented the highest values of genetic diversity [π% (sd) = 0.23...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plastid DNA; Microsatellites; Threatened species; Grasslands; Herbaceous species.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000100108
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Houseflies speaking for the conservation of natural areas: a broad sampling of Muscidae (Diptera) on coastal plains of the Pampa biome, Southern Brazil Rev. Bras. entomol.
Zafalon-Silva,Ândrio; Kirst,Frederico Dutra; Krüger,Rodrigo Ferreira.
ABSTRACT The Brazilian Coastal Plain of the Pampa Biome (CPPB), has suffered fragmentation caused by resource extraction and cattle raising. In turn, conservation proposals are needed to prevent the anthropisation of Pampa natural areas. The first step towards conservation proposals by using insects is fauna inventories, providing data support for legislators. Thus, we undertook a regional and broad-scale sampling survey to investigate the diversity of Muscidae flies in protected and non-protected areas of CPPB. In addition, we carried out an ecological guild diversity analysis as a metric approach of bioindication. The Muscidae sampling resulted in 6314 specimens, 98 species taxa in 31 genera. Based on diversity estimators, our sampling represents 70-86%...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic forest; Diptera; Ecology; Guilds; Grasslands; Muscidae.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262018000400292
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Land-Use and Land Cover Dynamics in South American Temperate Grasslands Ecology and Society
In the Río de la Plata grasslands (RPG) biogeographical region of South America, agricultural activities have undergone important changes during the last 15–18 years because of technological improvements and new national and international market conditions. We characterized changes in the landscape structure between 1985–1989 and 2002–2004 for eight pilot areas distributed across the main regional environmental gradients. These areas incorporated approximately 35% of the 7.5 × 105 km&#178 of the system. Our approach involved the generation of land-use and land cover maps, the analysis of landscape metrics, and the computation of annual transition probabilities between land cover types. All of the...
Tipo: Peer-Reviewed Reports Palavras-chave: Campos; Fragmentation; Grasslands; Land use; Landscape dynamics pampas; Remote sensing; Spatial metrics.
Ano: 2008
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Lolium multiflorum seeds in the soil: I. Soil seed bank dynamics in a no til system Rev. bras. sementes
Maia,Fernanda Costa; Maia,Manoel de Souza; Bekker,Renée M.; Berton,Rogério Previatti; Caetano,Leandro Sebastião.
The objective of the study was to characterize annual ryegrass seed population dynamics, managed for natural re-sowing, in no til systems in rotation with soybean, in different chronosequences An area was cultivated for two years with soybean, left as fallow land for the next two years and then cultivated again with soybean for the next two years. The four chronosequences represented different management periods, two with soybean (6 and 8 years old) and the other two resting (3 and 9 years old). Soil samples were taken every month during one year and divided into two depths (0-5 and 5-10 cm). Vegetation dynamics were also evaluated (number of plants, inflorescences and seedlings). Soil seed bank (SSB) dynamics showed structural patterns in time, with a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Annual ryegrass; Buried seeds; Soybean; Grasslands; No til system.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222008000200013
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Microbial quality of soil from the Pampa biome in response to different grazing pressures Genet. Mol. Biol.
Vargas,Rafael S.; Bataiolli,Renata; da Costa,Pedro B.; Lisboa,Bruno; Passaglia,Luciane Maria P.; Beneduzi,Anelise; Vargas,Luciano K..
The aim of this study was to evaluate the impact of different grazing pressures on the activity and diversity of soil bacteria. We performed a long-term experiment in Eldorado do Sul, southern Brazil, that assessed three levels of grazing pressure: high pressure (HP), with 4% herbage allowance (HA), moderate pressure (MP), with 12% HA, and low pressure (LP), with 16% HA. Two reference areas were also assessed, one of never-grazed native vegetation (NG) and another of regenerated vegetation after two years of grazing (RG). Soil samples were evaluated for microbial biomass and enzymatic (β-glucosidase, arylsulfatase and urease) activities. The structure of the bacterial community and the population of diazotrophic bacteria were evaluated by RFLP of the 16S...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial diversity; Diazotrophic bacteria; Diversity; Grasslands; Soil microbial communities.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000200205
Registros recuperados: 34
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