oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Cladocera Chydoridae of high altitude water bodies (Serra da Mantiqueira), in Brazil
SANTOS-WISNIEWSKI, M. J.;ROCHA, O.;GüNTZEL, A. M.;MATSUMURA-TUNDISI, T.;
Brazilian Journal of Biology , 2002, DOI: 10.1590/S1519-69842002000400016
Abstract: the diversity of species of cladocera, chydoridae in the water bodies belonging to the water management unity of serra da mantiqueira, was studied inside the biota/fapesp program. a total of 21 water bodies were analyzed and the sampling was carried out between 9th and 11th september, 1999. horizontal and vertical net hauls were taken at littoral and limnetic region in each lake. most water bodies in serra da mantiqueira unity are small, shallow, and densely colonized by macrophytes. most species of cladocera found belong to the chydoridae family, being typical inhabitants of the littoral zone, living associated with macrophytes. a total of 12 species were found, 9 of the subfamily aloninae and 3 chydorinae. in more than half of the water bodies the relative abundance of chydorids reached 100%, and they were dominant in most of the others, with few exceptions. alona rustica was the most frequent species, occurring in 62% of the water bodies. the results evidenced the importance of the littoral zone as propitious habitats for the species of chydoridae and contributing significantly to the diversity of cladocera as a whole.
Cladocera Chydoridae of high altitude water bodies (Serra da Mantiqueira), in Brazil  [cached]
SANTOS-WISNIEWSKI M. J.,ROCHA O.,GüNTZEL A. M.,MATSUMURA-TUNDISI T.
Brazilian Journal of Biology , 2002,
Abstract: The diversity of species of Cladocera, Chydoridae in the water bodies belonging to the water management unity of Serra da Mantiqueira, was studied inside the BIOTA/FAPESP Program. A total of 21 water bodies were analyzed and the sampling was carried out between 9th and 11th September, 1999. Horizontal and vertical net hauls were taken at littoral and limnetic region in each lake. Most water bodies in Serra da Mantiqueira unity are small, shallow, and densely colonized by macrophytes. Most species of Cladocera found belong to the Chydoridae family, being typical inhabitants of the littoral zone, living associated with macrophytes. A total of 12 species were found, 9 of the subfamily Aloninae and 3 Chydorinae. In more than half of the water bodies the relative abundance of chydorids reached 100%, and they were dominant in most of the others, with few exceptions. Alona rustica was the most frequent species, occurring in 62% of the water bodies. The results evidenced the importance of the littoral zone as propitious habitats for the species of Chydoridae and contributing significantly to the diversity of Cladocera as a whole.
Sele??o de ameixeiras promissoras para a Serra da Mantiqueira
Oliveira, Marcelo Caetano de;Pio, Rafael;Ramos, José Darlan;Alvarenga, ?ngelo Albérico;Santos, Ver?nica Andrade dos;Fante, Camila;
Revista Ceres , 2011, DOI: 10.1590/S0034-737X2011000400019
Abstract: salicina lindl) is a fruit species commercially cultivated in regions of mild and severe winters, and cultivar selection is mainly based on climate adaptation. the objective of this study was to select superior genetic materials, adapted to edafoclimatic conditions to the south region of minas gerais state, in the highlands of serra da mantiqueira. the evaluations were carried out with the plum cultivars 'pretinha', 'irati', 'gema de ouro', 'reubennel', 'roxa de delfim moreira', 'gulfblaze', 'frontier', 'santa rosa', and nine selections (selection i, selection ii, selection iii, selection iv, selection v, selection vi, selection vii, selection viii and selection ix), grafted onto the rootstock 'okinawa'. the experiment was arranged in arandomized block design, with eigth cultivars and nine selections, with four repetitions. plant vegetative development of eighteen, and twenty-four month old plum trees was evaluated during the crop cycle 2007/2008, besides phenological data on sprouting, blooming, fruiting and harvest. the results showed that the selections iii and ix were earlier; selections vii, viii, 'gema de ouro' and 'reubennel' were mid-season; and 'irati' and 'gulfblaze' were late. cultivars irati, gema de ouro and reubennel showed better adaptation to soil and climatic conditions to the region of the highlands of the mantiqueira mountain range in minas gerais.
First assessment of the avifauna of Araucaria forests and other habitats from extreme southern Minas Gerais, Serra da Mantiqueira, Brazil, with notes on biogeography and conservation
Vasconcelos, Marcelo Ferreira de;D'Angelo Neto, Santos;
Papéis Avulsos de Zoologia (S?o Paulo) , 2009, DOI: 10.1590/S0031-10492009000300001
Abstract: the avifauna of the araucaria forests in the higher reaches of the serra da mantiqueira massif is little known and poorly documented. this region is recognized as an important area of differentiation of birds in southeastern brazil. here, we present the first ornithological survey of the araucaria forests and associated habitats in the mountains of extreme southern minas gerais state, near the southern tip of the serra da mantiqueira. the study area comprises the serra do juncal region and several adjacent sites, located in the municipalities of gon?alves and camanducaia. we recorded 206 bird species, of which 57 (27.7%) are endemic to the atlantic forest. several records represent the first specimens for minas gerais, in the hinterlands of serra da mantiqueira, proving that many atlantic species also occur in the intern most slope of this mountain range. examples are: dysithamnus xanthopterus, chamaeza ruficauda, leptasthenura setaria, heliobletus contaminatus, hemitriccus obsoletus, phylloscartes difficilis, piprites pileata, poospiza thoracica, and cacicus chrysopterus. the region is also a previously unknown area of sympatry of other closely related species: scytalopus notorius and s. speluncae, lepidocolaptes squamatus and l. falcinellus, and basileuterus culicivorus and b. hypoleucus. both species of lepidocolaptes and basileuterus hybridize in the region. we also comment on the avifauna conservation, which have been threatened by eco-tourism, building of new styles of houses, domestic animals, forest fragmentation, and plantations.
Nutritional Quality of Olives and Olive oil Produced in the Serra Da Mantiqueira from Brazil  [PDF]
?ngelo Albérico Alvarenga, Joyce Ludimila da Cruz, Adelson Francisco de Oliveira, Luiz Fernando de Oliveira da Silva, Emerson Dias Gon?alves, Paulo Márcio Norberto
Agricultural Sciences (AS) , 2017, DOI: 10.4236/as.2017.87039
Abstract: The olive tree (Olea europaea L.) is one of the oldest fruits grown by man. Its fruit can be processed into olive oil or treated properly and serve directly for the in natura consumption in the form of olives. Extracted from the olive, the olive oil is highly valued in the market, for its nutritional benefits and also for its unique and delicate flavor. Brazil is the second largest importer of olive oil in the world, but technology is already available and the expansion of the crop has been taking place in the south-southeast regions, where the climate is favorable, in order to serve this market. The objective of this work was to evaluate the physical and chemical qualities of the olives and characterize, sensorially and chemically, olive oils from different olive cultivars planted in the Region of Serra da Mantiqueira. The olives and olive oils produced from the cultivars Arbequina, Arbosana, Grapolo 541, Koroneiki and Maria da Fé were evaluated at the EPAMIG Experimental Field of Maria da Fé, Minas Gerais, and Brazil. In the first experiment the olives harvested in February of 2015 were analyzed in terms of weight, volume, transverse and longitudinal diameter of the fruit and the lump and the relation of the olive/lump and the chemical (protein, lipid, moisture and ashes). In the second experiment the olives were processed by the grinding, beating and centrifugation method to obtain the oils. The olive oils were analyzed for acidity, peroxide index and absorbance in the ultraviolet region at 274 nm, 270 nm, 266 nm and 232 nm. After this characterization the olive oils produced in the Serra da Mantiqueira were then submitted to sensorial analysis. The results were submitted to analysis of variance and the means were compared by the Tukey test at 5% of probability. The interpretation of the data from the sensorial analysis was done using the software sensomaker. Differences were observed between olives and olive oils produced by different cultivars in the Serra da Mantiqueira. The cultivar Grappolo 541 produces larger fruits, indicated for the preparation of olives and in natura consumption. Due to the small size of the fruit, the cultivar Maria da Fé is more suitable for olive oil production. The oils of all cultivars are within the parameters established by the Brazilian legislation in force, being classified as Extra Virgin Olive Oil. The oils of all cultivars were well accepted by consumers, especially the cultivars Maria da Fé and Grappolo 541.
Spatial continuity of soil attributes in an Atlantic Forest remnant in the Mantiqueira Range, MG Continuidade espacial de atributos do solo sob remanescente de Mata Atlantica na Serra da Mantiqueira, MG  [cached]
Marcela de Castro Nunes Santos,José Marcio de Mello,Carlos Rogério de Mello,Léo Fernandes ávila
Ciência e Agrotecnologia , 2013,
Abstract: The spatial characterization of soil attributes is fundamental for the understanding of forest ecosystems. The objective of this work was to develop a geostatistical study of chemical and physical soil attributes at three depths (D1 - 0-20 cm; D2 - 20-50 cm; D3 - 50-100 cm), in an Experimental Hydrographic Micro-catchment entirely covered by Atlantic Forest, in the Mantiqueira Range region, Minas Gerais. All the considered variables presented spatial dependence structure in the three depths, and the largest degrees of spatial dependence were observed for pH in the three depths, soil cation exchange capacity potential in D3, soil organic matter in D1 and D3 and clay and soil bulk density in D2. The method most used for the adjustments of semi-variogram models was the Maximum Likelihood and the most selected model was the Exponential. Furthermore, the ordinary kriging maps allowed good visualization of the spatial distribution of the variables. A caracteriza o espacial de atributos do solo é fundamental para o entendimento de ecossistemas florestais. Neste trabalho, objetivoi-se desenvolver um estudo geoestatístico de atributos químicos e físicos do solo em três profundidades (P1 - 0-20 cm; P2 - 20-50 cm; P3 - 50-100 cm), em uma Microbacia Hidrográfica Experimental inteiramente coberta por Mata Atlantica, na regi o Serra da Mantiqueira, Minas Gerais. Todas as variáveis consideradas apresentaram estrutura de dependência espacial nas três profundidades, sendo que os maiores graus de dependência espacial foram observados para pH nas três profundidades, capacidade de troca de cátions potencial do solo em P3, matéria organica do solo em P1 e P3 e argila e densidade do solo em P2. O método mais utilizado para ajuste foi o da Máxima Verossimilhan a e o modelo mais selecionado foi o Exponencial. Além disso, os mapas de krigagem permitiram boa visualiza o da distribui o espacial das variáveis.
Seasonality of net radiation in two sub-basins of Paracatu by the use of modis sensor products Sazonalidade do saldo de radia o em duas sub-bacias do Paracatu por meio da utiliza o de produtos do sensor modis  [cached]
Evaldo de P. Lima,Gilberto C. Sediyama,Bernardo B. da Silva,José M. Gleriani
Engenharia Agrícola , 2012,
Abstract: The net radiation (Rn) represents the main source of energy for physical and chemical processes that occur in the surface-atmosphere interface, and it is used for air and soil heating, water transfer, in the form of vapor from the surface to the atmosphere, and for the metabolism of plants, especially photosynthesis. If there is no record of net radiation in certain areas, the use of information is important to help determine it. Among them we can highlight those provided by remote sensing. In this context, this work aims to estimate the net radiation, with the use of products of MODIS sensor, in the sub-basins of Entre Ribeiros creek and Preto River, located between the Brazilian states of Goiás and Minas Gerais. The SEBAL (Surface Energy Balance Algorithm for Land) was used to obtain the Rn in four different days in the period of July to October, 2007. The Rn results obtained were consistent with others cited in the literature and are important because the orbital information can help determine the Rn in areas where there are not automatic weather stations to record the net radiation. O saldo de radia o (Rn) representa a principal fonte de energia para os processos físico-químicos que ocorrem na interface superfície-atmosfera, sendo utilizado no aquecimento do ar e do solo, transferência da água, na forma de vapor da superfície para a atmosfera, e metabolismo das plantas, especialmente a fotossíntese. Se n o houver o registro do saldo de radia o em determinadas áreas, torna-se importante a utiliza o de informa es que ajudem a determiná-lo. Entre elas, podemos destacar as fornecidas por sensoriamento remoto. Neste contexto, este trabalho tem o objetivo de determinar o saldo de radia o, com a utiliza o de produtos do sensor MODIS, nas sub-bacias do Ribeir o Entre Ribeiros e Rio Preto, que ficam entre os Estados de Goiás e Minas Gerais. O SEBAL (Surface Energy Balance Algorithm for Land) foi utilizado para a obten o do Rn em quatro dias diferentes, no período de julho a outubro de 2007. Os resultados encontrados foram compatíveis com outros citados em literatura e s o importantes, pois as informa es orbitais podem auxiliar na determina o do Rn em áreas onde n o existam esta es meteorológicas automáticas que registrem o saldo de radia o.
Biologia populacional de Pareiorhina rudolphi (Loricariidae, Hypostominae) na microbacia do Ribeir o Grande, serra da Mantiqueira oriental, Estado de S o Paulo = Population biology of Pareiorhina rudolphi (Loricariidae, Hypostominae) in the Ribeir o Grande system, eastern serra da Mantiqueira, S o Paulo State
Francisco Manoel de Souza Braga,Leandro Muller Gomiero,Ursulla Pereira Souza
Acta Scientiarum : Biological Sciences , 2009,
Abstract: Pareiorhina rudolphi foi amostrada em riachos da microbacia do Ribeir o Grande, serra da Mantiqueira oriental (22o47’08’’S, 45o28’17’’W). As amostras foram realizadas usando-se uma unidade de pesca elétrica, em julho/2002, outubro/2001, fevereiro/2002 e abril/2002. A propor o sexual apresentou diferen a significativa doesperado 1:1 (χ2 = 6,53; p < 0,05), determinando-se uma propor o de 1,6:1 (fêmea:macho). Pareiorhina rudolphi tem um período de desova indo da primavera ao ver o, os altos valores observados para a rela o gonadossomática e o fator de condi o relativo em outubro e fevereiro coincidem com o período reprodutivo. O comprimento da primeira matura o gonadal de P. rudolphi foi de 4,45 cm para ambos os sexos. A fecundidade absoluta foi baixa, variando de quatro a 11 ovócitos. O perifiton foi usado como fonte direta de alimento para a espécie, que permanece aderida ao substrato com seus largos lábioscirculares, e usam seus conspícuos dentes amarelados para raspar. Os parametros de crescimento, taxa de mortalidade natural e taxa de sobrevivência foram respectivamente: K = 0,35 ano-1, L∞ = 7,2 cm, tmax = 8,6 anos, M = 1,1 ano-1, S = 33%. As característicasapresentadas por P. rudolphi s o adapta es ao ambiente em fun o de um ajuste populacional, e n o de abundancia da espécie. Pareiorhina rudolphi was sampled in streams of the Ribeir o Grande system, eastern Serra da Mantiqueira (22o47’08’’S, 45o28’17’’ W). Samplings were carried out using an electrofishing device, during the months of July/2001, October/2001, February/2002 and April/2002. Sex-ratio diverged significantly from the expected 1:1 ratio (χ2 = 6.53; p < 0.05), standing at 1.6:1 (female: male). The spawning period for Pareiorhina rudolphi lasts from spring to summer, with the highest observed in October and February by the gonadosomatic index and the relative condition factor coincided with the spawning period. The length at sexual maturity of P. rudolphi is about 4.45 cmfor both sexes. The absolute fecundity was low, and ranged from 4 to 11 oocytes. The periphyton was used as a direct food source by the species, which remain attached to the substrate with theirlarge circular lips, and use their conspicuous slightly yellowish teeth to graze the periphyton. The growth parameters, natural mortality rate and survival rate for P. rudolphi were respectively: K = 0.35 year-1, L∞ = 7.2 cm, tmax = 8.6 years, M = 1.1 year-1, S = 33%. The characteristics presented by P. rudolphi occur in the environment in function of a population adjustment, and not ofspecies abundance.
Regenera??o natural em áreas desmatadas e dominadas por Pteridium aquilinum (L.) Kuhn. na Serra da Mantiqueira
Ribeiro, Selma Cristina;Botelho, Soraya Alvarenga;Fontes, Marco Aurélio Leite;Garcia, Paulo Oswaldo;Almeida, Hisaías de Souza;
CERNE , 2013, DOI: 10.1590/S0104-77602013000100009
Abstract: this study was set out with the objective of analyzing successional process in areas which are deforested and dominated by pteridium aquilinum in the serra da mantiqueira mountain range, by researching the natural regeneration of shrub and tree species and evaluating both disturbance history and the edaphic conditions on the natural regeneration community. this research investigated two abandoned pasture areas in bocaina de minas county exposed to natural regeneration intervals ranging from six years (area named 6a) to twenty years (area named 20a). the inventory occurred from sixty plots of 10 m2, where all samples surveyed were between 0.15 m and 3 m high. all samples were identified and both the diameter in ground level and total height of the specimens were measured. the survey totaled 1,159 samples and 53 species. melastomataceae was registered with the highest species richness and the highest specimen abundance. the two sampled areas showed species composition differences, with jaccard similarity coefficient equal to 3.7%. the canonical correspondence analysis showed the correlations between natural regeneration stratum and non-labile phosphorus and clay in the 6a area. on the other hand, the 20a area showed correlations between plant regeneration and the k, p, ca2+, al3+ levels, with higher ph levels, and with the sum of exchangeable bases. in addition, the vegetation surveyed in area 20a was correlated with higher pteridium population density. the results showed that the dominance of pteridium aquilinum leads to successional process under inhibition, in which the ferns act negatively on the richness and abundance of shrub populations. it was also confirmed the pteridium's affinity to steep areas, mainly in higher altitudes, where the soil is acid, as well as its preference to disturbed areas. moreover, we highlight the fragilities of the mountain environments and the importance of preserving natural vegetation, as well as the bracken management as a strategy
Enraizamento de estacas em cultivares de oliveiras promissores para a Serra da Mantiqueira
Oliveira, Marcelo Caetano de;Ramos, José Darlan;Pio, Rafael;Santos, Ver?nica Andrade dos;Silva, Fábio Oséias dos Reis;
Revista Ceres , 2012, DOI: 10.1590/S0034-737X2012000100021
Abstract: currently, there is lack of information about cutting rooting of olive cultivars for the highlands of mantiqueira range, in minas gerais. the objective of this study was to evaluate the rooting of different cultivars using perlite and sand as substrates. cuttings of cultivars maria da fé, mission, penafiel, grappolo 575, galega, ascolano 315 and grappolo 54 were collected in january and prepared with approximately 12 cm in length, 4 mm in diameter and 4 internodes, keeping four leaves in the first two nodes. the cuttings were treated with 3 mg l-1 iba for five seconds and, then, put to root in plastic trays, containing perlite or sand and kept under intermittent nebulization system in a greenhouse. both substrates were fertilized with nippoterra?, (diluted to 25 g l-1), in the rate of 62 ml of solution per liter of substrate. the percentage of cuttings forming callus, rooting and the average number of roots were determined after 61 days. cuttings of the cultivars ascolano 315 and maria da fé showed the best results. the substrate sand increased the rhizogenic capacity of olive cuttings.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.