Academic literature on the topic 'Central Amazon'

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Journal articles on the topic "Central Amazon"

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Cascon, Leandro Matthews, and Caroline Fernandes Caromano. "Paleoethnobotany perspectives in Central Amazon archaeology." Revista do Museu de Arqueologia e Etnologia. Suplemento, supl.8 (September 10, 2009): 207. http://dx.doi.org/10.11606/issn.2594-5939.revmaesupl.2009.113523.

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Inspirado pelos problemas de pesquisa desenvolvidos pelo Projeto Amazônia Central1, o presente artigo aborda o potencial da paleoetnobotânica na elucidação das relações estabelecidas pelos grupos amazônicos com o mundo vegetal e como estas relações influenciaram definitivamente a história da Floresta Amazônica e dos grupos que nela viveram
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Murdmaa, I. O., O. M. Dara, M. A. Lykova, D. G. Borisov, and E. V. Ivanova. "Mineralogy of Quaternary Sediments from the Valley of Vema Fracture Zone (Central Atlantic)." Океанология 64, no. 1 (2024): 46–65. http://dx.doi.org/10.31857/s0030157424010048.

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The content of sediment forming minerals in two cores from the eastern (ANS45-37) and western (ANS45-48) parts of the Vema transform fault valley is studied using the semi-quantitative XRD analysis of bulk powder sediment samples. The mineral composition of deep-sea sediments from the Amazone cone is also analyzed for comparison. It appeared that the average composition of the terrigenous component of both cores (according to prevailing quartz, secondary mica, plagioclase and potassium feldspar, as well as smectite, chlorite, kaolinite, illite) is quite similar and approximately corresponds to the composition of sediments from the Amazon cone. The ratio of four clay minerals suggests the supply of terrigenous material to the Amazon and Orinoco due to the erosion of the Andes and humid tropical weathering in the lower course of the rivers with further transportation of the suspended load to the ocean. This material was transported to the Vema transform valley due to the interplay between the gravity flows from the South American continental slope and the current of the Antarctic Bottom Water. Data on biogenic calcite (planktic foraminiferal tests, nannofossils) and opal A (radiolarians, sponge spicules) are obtained in addition. In the study area, several authigenic (diagenetic) minerals are identified. In particular, siderite and greigite are first found in the sediments from the Vema valley and Amazon cone, respectively.
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Hoefle, Scott William. "Patronage and empowerment in the central Amazon." Bulletin of Latin American Research 19, no. 4 (2000): 479–99. http://dx.doi.org/10.1111/j.1470-9856.2000.tb00120.x.

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Bentos, Tony V., Rita C. G. Mesquita, and G. Bruce Williamson. "Reproductive Phenology of Central Amazon Pioneer Trees." Tropical Conservation Science 1, no. 3 (2008): 186–203. http://dx.doi.org/10.1177/194008290800100303.

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Barros, MLB, and G. Boecken. "Jungle yellow fever in the central Amazon." Lancet 348, no. 9032 (1996): 969–70. http://dx.doi.org/10.1016/s0140-6736(05)65392-5.

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Mortillaro, J. M., M. Pouilly, M. Wach, C. E. C. Freitas, G. Abril, and T. Meziane. "Trophic opportunism of central Amazon floodplain fish." Freshwater Biology 60, no. 8 (2015): 1659–70. http://dx.doi.org/10.1111/fwb.12598.

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Rizzolo, Joana A., Cybelli G. G. Barbosa, Guilherme C. Borillo, et al. "Soluble iron nutrients in Saharan dust over the central Amazon rainforest." Atmospheric Chemistry and Physics 17, no. 4 (2017): 2673–87. http://dx.doi.org/10.5194/acp-17-2673-2017.

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Abstract. The intercontinental transport of aerosols from the Sahara desert plays a significant role in nutrient cycles in the Amazon rainforest, since it carries many types of minerals to these otherwise low-fertility lands. Iron is one of the micronutrients essential for plant growth, and its long-range transport might be an important source for the iron-limited Amazon rainforest. This study assesses the bioavailability of iron Fe(II) and Fe(III) in the particulate matter over the Amazon forest, which was transported from the Sahara desert (for the sake of our discussion, this term also includes the Sahel region). The sampling campaign was carried out above and below the forest canopy at the ATTO site (Amazon Tall Tower Observatory), a near-pristine area in the central Amazon Basin, from March to April 2015. Measurements reached peak concentrations for soluble Fe(III) (48 ng m−3), Fe(II) (16 ng m−3), Na (470 ng m−3), Ca (194 ng m−3), K (65 ng m−3), and Mg (89 ng m−3) during a time period of dust transport from the Sahara, as confirmed by ground-based and satellite remote sensing data and air mass backward trajectories. Dust sampled above the Amazon canopy included primary biological aerosols and other coarse particles up to 12 µm in diameter. Atmospheric transport of weathered Saharan dust, followed by surface deposition, resulted in substantial iron bioavailability across the rainforest canopy. The seasonal deposition of dust, rich in soluble iron, and other minerals is likely to assist both bacteria and fungi within the topsoil and on canopy surfaces, and especially benefit highly bioabsorbent species. In this scenario, Saharan dust can provide essential macronutrients and micronutrients to plant roots, and also directly to plant leaves. The influence of this input on the ecology of the forest canopy and topsoil is discussed, and we argue that this influence would likely be different from that of nutrients from the weathered Amazon bedrock, which otherwise provides the main source of soluble mineral nutrients.
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Hellmich, Dominique L., Andre B. S. Saidenberg, and Timothy F. Wright. "Genetic, but Not Behavioral, Evidence Supports the Distinctiveness of the Mealy Amazon Parrot in the Brazilian Atlantic Forest." Diversity 13, no. 6 (2021): 273. http://dx.doi.org/10.3390/d13060273.

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The presence of unidentified cryptic species within a species complex can obscure demographic trends of vulnerable species, impacting potential species conservation and management decisions. Previous work identified a taxonomic split between Central and South American populations of the mealy amazon (Amazona farinosa) that subsequently resulted in the elevation of these two populations to full species status (Amazona guatemalae and A. farinosa, respectively). In that study, however, a third, geographically disjunct population from the Brazilian Atlantic Forest was insufficiently sampled, limiting the ability of researchers to fully evaluate its genetic distinctiveness. Given that significant levels of biodiversity and endemism are found in this region, we aimed to use genetic and behavioral data to determine if the Atlantic Forest population of A. f. farinosa represents a third cryptic species within the complex. We sequenced 6 genes (4 mitochondrial and 2 nuclear introns) from the Atlantic Forest population of A. f. farinosa to measure the genetic relationships between this population and all other recognized species and subspecies of the mealy amazon. In addition, we use spectrographic cross-correlation and an analysis of 29 acoustic parameters to determine whether the taxa diverge in their learned contact call structure and if the degree of vocal differentiation correlates to genetic structure. We found that the Atlantic Forest population of A. f. farinosa was genetically distinct from that of the greater Amazon basin, but the degree of differentiation was less than that separating the Central and South American taxa. Acoustic analysis revealed substantial variation in contact call structure within each clade. This variation created substantial overlap in acoustic space between the clades. In all, the degree of call divergence between clades did not correspond to the degree of genetic divergence between the same clades. The results suggest that in taxa with substantial geographic variation in learned calls, such as the mealy amazon, vocalizations may not be a useful tool in the identification of cryptic species that are lifelong vocal learners. While these results do not support the elevation of the Brazilian Atlantic Forest population of the mealy amazon to full species status, given current trends of habitat loss in the Atlantic Forest as well as the imperiled status of large parrot species globally, we argue that this population nonetheless warrants special conservation and management consideration as a pool of unique genetic diversity within the southern mealy amazon species.
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Magalhães, Ivo Augusto Lopes, Osmar Abílio de Carvalho Junior, Renato Fontes Guimarães, and Roberto Arnaldo Trancoso Gomes. "SENTINEL-1 TIME SERIES ANALYSIS ON CENTRAL AMAZON FLOODS." Mercator 21, no. 1 (2022): 1–19. http://dx.doi.org/10.4215/rm2022.e21019.

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This study aimed to analyze the dynamics of the flooded areas of the Sentinel 1-SAR time series in a section of the Central Amazon between September 26, 2016, and February 8, 2020. The total of images was 59 for each polarization. In addition, the study calculated the average ordinary flood line (ALOF) from the heights of the fluviometric rulers between the years 1967 to 2020 and compared it with the values present in the radar time series. The pre-processing of the Sentinel-1 time series in the VV and VH polarizations used the following methodological sequence: Apply Orbit File, Radiometric Calibration (σ0), Range-Doppler Terrain Correction, Speckle Filter, and conversion to decibels (dB). The previous analysis of the adaptive filters showed different results for the two polarizations, obtaining the best result for the VV polarization using the Frost filter with 3x3 and the VH polarization with the Lee filter 3x3. The extraction of water bodies and wetlands used a threshold value, making masks for the entire period. The most considerable extent of the floodable area occurred on June 17, 2019, with 6,611.86 km2, representing 16.42% of the SAR scene in the VH polarization and 6,443.19 km2, representing 16.10% of the SAR scene in the VV polarization. The relationship between the VH and VV wetlands to the ruler's height was satisfactory, with coefficients of determination (R2) of 0.79 in the VH polarization and of 0.64 in the VV polarization and a p-value less than 0.05. Keywords: Remote sensing; Radar; Mapping of Water Bodies.
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MOTTA, JESSICA, MARCELO MENIN, ALEXANDRE P. ALMEIDA, TOMAS HRBEK, and IZENI PIRES FARIAS. "When the unknown lives next door: a study of central Amazonian anurofauna." Zootaxa 4438, no. 1 (2018): 79. http://dx.doi.org/10.11646/zootaxa.4438.1.3.

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The number of species of anurans in the Amazon is highly underestimated with new studies reporting the discovery of a large number of species every year. This advance in the discovery of biodiversity is due to the use of molecular tools, especially 16S rRNA gene barcoding, which is used to identify species and discover cryptic lineages. Few anurans of the central Amazon have molecular sequence data available in public databases, which contrasts with the considerable species richness of this biome. The aim of the present study was to test for the presence of cryptic species using the mPTP delimitation algorism. We morphologically identified 26 species, of which 23 were confirmed molecularly with the remaining three species identified as other congeneric species, since sequences with the same epithet do not exist in GenBank. Of these 23 species, nine contained one lineage restricted to central Amazon. This represents an underestimate of 39% in the taxonomic diversity in our sample. This is particularly surprising given that our sampling sites are among the best-studied regions of the central Amazon.
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Dissertations / Theses on the topic "Central Amazon"

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Araujo, Lima Carlos A. R. M. "Larval development and reproductive strategies of Central Amazon fishes." Thesis, University of Stirling, 1990. http://hdl.handle.net/1893/22855.

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Larval development and reproduction of 19 species of Central Amazonian fish (five cichlids, two siluriforms, one osteoglossiform and 11 characiforms) were studied over two years. Most species spawn during the flooding season. The cichlids, the siluriforms and two species of characiform are nest spawners, reproducing in the littoral areas of the floodplain. The osteoglossiform is a mouth-brooder. The remaining characiforms spawn in the river channels and show no parental care. Two main strategies explain 90% of the variability of reproductive traits found among the 19 species. The first strategy is used by riverine spawners (characiforms). They have high fecundity , high to very high reproductive expenditure (calories per spawn per wet weight of female) and spawn once a year during a short season. Their eggs vary in size from 0.06 to 0.3 mg and have intermediate to high calorific value. The second strategy is used by the cichlids and two species of characiforms. They have low fecundity, low reproductive expenditure, long spawning season, multiple spawnings per season and some of them show parental care. Their eggs vary in size from 0.4 to 1.2 mg and have an intermediate calorific content. The other three species show distinct combinations of reproductive traits, but have as common feature a high reproductive expenditure, a short annual spawning season and parental care. Patterns of larval development are correlated with egg size and adult spawning sites. Egg size explained most of variability of larval body size at hatching, pectoral fin bud, eye pigmentation, jaw formation, swim bladder inflation, onset of swimming, first feeding and maximum size attained with exclusively endogenous feeding. The pattern of blood circulation of the larvae was correlated with the spawning sites. Larvae of riverine spawners are small, utilize yolk efficiently and are relatively resistant to starvation. Newly hatched larvae of riverine spawners seem to be very sensitive to physico-chemical conditions of the floodplain lakes, but by the first feeding stage they develop some resistance to the low availability of oxygen. Larvae of littoral spawners are large, utilize yolk less efficiently, and seem to be resistant to low concentrations of oxygen. The resistance of larvae to oxygen deficiency is correlated with the development of the larval respiratory system. It is suggested that egg size of riverine spawners was selected to optimize the distance of the dispersal of the larvae in a range of floodplain lakes. Conversely, egg size of floodplain spawners seemed to be selected to optimize larval survival in the spawning lake. The results are further discussed in relation to life history models.
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Luizao, Flavio J. "Ecological studies in contrasting forest types in central Amazonia." Thesis, University of Stirling, 1995. http://hdl.handle.net/1893/2160.

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Most of the Amazonia is covered by the lowland evergreen rain forest (LERF) formation. A small proportion of the region (5-6% in total) is covered by heath forest, which is particularly common in the Rio Negro basin on Spodosols - white sand soils with a layer of mor humus. The smaller facies of heath forest (SHF) is called 'Camping' in Brazil and often lacks the mor humus; the taller facies (TBF) is called 'Campinarana'. The present study was made in central Amazonia, on a gradient from SHF through THF to well developed LERF. Soil, vegetation, and nutrient dynamics were studied in three 50 m x 50m plots in each type of forest. Litterfall was measured during one year and litter standing crop was measured three times a year. Three decomposition experiments, using bagged leaf litter, were made using leaves of two common species from the heath forests and one from the LERF. Fertiliser addition experiments in the field and in the laboratory were carried out to determine the potential nutrient limitations for plants in the three forest types. Annual litterfall was highest in the dry season and was 3.8 t ha-1 yr-1 in the SHF, 6.3 t ha-1 yr-1 in the THF and 7.8 t ha-1 yr-1 in the LERF. The rates of weight loss of the enclosed leaf litter were most rapid in the LERF and slowest in the SHF. The leaves of the LERF species Clitoria racemosa decomposed faster than those of the heath forest species. Fine roots penetrating litter-bags differed significantly among forest types and leaf species, and increased the decay rates. There were no significant differences in decomposition rates between the wet and dry season experiments. Significant differences in the release of chemical elements were observed: higher immobilization of iron and aluminium in the LERF; higher potassium and copper release in THF; and lower calcium, but higher boron release rates in SHF. Significantly higher immobilization of iron and aluminium (mainly in LERF) was found in bags penetrated by fine roots, while release of magnesium, calcium, manganese and zinc was significantly increased by fine roots, particularly in the TI-IF. Leaf mass loss and nutrient release were mostly controlled by abiotic factors in the SHF, but organisms were more active in the THF and LERF. Diplopoda were the dominant decomposers, particularly in the THF. Fertiliser addition showed an overall positive effect of liming, especially in heath forest soils. Nitrogen and phosphorus additions did not induce higher biomass production, while calcium chloride addition invariably induced a high mortality. 11÷ ion toxicity, together with a higher concentration of soil phenolics are suggested as causes of the poor growth in the heath forests, but in the SHF, where it lacks mor humus, limitation by nutrients, especially basic cations, may occur.
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Olsen, Jesse Eric Burle. "Flood pulse influences on exploited fish populations of the Central Amazon." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/83864.

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Seasonally fluctuating water levels, known as flood pulses, influence the population dynamics and catches of fishes from river-floodplains. Although different measures of flood pulses, here called flood pulse variables, have been correlated to changes in catches of river-floodplain fishes, the flood pulse variables that have the strongest relationships to catches have not been identified. Furthermore, it is unclear if flood pulses influence catches of river-floodplain fishes with different life history strategies in different ways. Catches of 21 taxa from approximately 18,000 fishing trips were modeled as a function of fishing effort, gear type, seasonal flood pulse variables, and interannual flood pulse variables. These models were analyzed to understand which flood pulse variables had the strongest relationships to catches, and evaluate different flood pulse influences among taxa with different life history strategies. High water flood pulse variables generally had positive influences on catches in future years, while low water flood pulse variables generally had negative influences on catches in future years. Flood pulses generally had stronger influences on the catches of fishes with high fecundities and smaller eggs than on catches of fishes with low fecundities and larger eggs. Variation was observed in strengths and directions of flood pulse influences on catches of fishes with similar and different life history strategies. While my results were generally consistent with prevailing knowledge of how flood pulses influence catches of fishes, other biological factors of specific fish populations may further explain population responses to flood pulses.<br>Master of Science
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Gribel, Rogerio. "Reproductive biology of two bombacaceous trees in the Brazilian Central Amazon." Thesis, University of St Andrews, 1996. http://hdl.handle.net/10023/14127.

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Studies were carried out on the reproductive biology of two bombacaceous trees (Pseudobombax munguba and Ceiba pentandra) which occur in the seasonally flooded areas of the white-water river basins ('varzea') in the Amazon region. The unique pollinator of P. munguba, which has nectarless flowers, is the large-sized phyllostomid bat Phyllostomus hastatus. In contrast, the flowers of C. pentandra are visited by a wide range of nocturnal (bats, marsupials, night-monkeys, hawk moths) and diurnal (bees, wasps, hummingbirds) animals, but only the phyllostomid bats, especially Phyllostomus hastatus and Phyllostomus discolor, play a relevant role in the pollination of this mass-flowering species. Both species appear to be self-incompatible since hand self-pollinated flowers always abscised 5-8 days after pollination, whereas a proportion of cross-pollinated flowers (20-29% in P. munguba; 17% in C. pentandra) formed fruit. However, analysis of fixed pistils using fluorescence microscopy revealed that in both species the self-pollen germinated normally on the stigma and the self-pollen tubes penetrated the ovules at the same rate as the cross-pollen tubes. Mixed-pollinated flowers (self- plus cross-pollen on the stigma) also set some fruits (9-14% in P. munguba; 9% in C. pentandra). Paternity analyses using isozyme genetic markers indicated that fruits resulting from controlled mixed-pollinations set a few selfed seeds (range of 0-28% in P. munguba; ca 2% in the studied tree of C. pentandra). The multilocus estimate of the outcrossing rate (tm) was calculated for P. munguba using data from two isozyme loci of 29 parent trees and 728 progenies. The population outcrossing estimation was high (tm = 0.948) suggesting that the breeding population is large and the level of inbreeding (both uniparental and biparental) is very low. The proportion of selfed-seeds produced by two neighbouring C. pentandra trees, which flowered simultaneously, was estimated using isozyme genetic markers at 9% and 28% respectively. It is considered that a high level of genetic load is the main factor responsible for the self-sterility and the predominant outcrossing mating system observed in both species. The number of lethal equivalents per zygote estimated for each was high: average of 13.8 (minimum 6.4) in the P. munguba population, and 12.3 for the single assessed individual of C. pentandra.
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Hardy, Elsa Rodrigues. "Cycle characteristics of planktonic cladocerans in a tropical lake, Central Amazon : field and experimental work." Thesis, Royal Holloway, University of London, 1989. http://repository.royalholloway.ac.uk/items/c71f2018-fabf-4a5a-ba6a-26653ffcccf2/1/.

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This thesis is concerned with an investigation into the effects of food concentration, temperature and turbidity on the life cycle characteristics such as growth, body size, development and reproduction of species of planktonic Cladocera brought to the U.K. from a shallow turbid Lake Jacaretinga, Amazonia. The species studied were Daphnia gessneri, Moina reticulata and Diaphanosoma sarsi. Long term growth experiments were performed using both batch and continuous flow culture under controlled laboratory conditions using various combinations of temperature (22&deg;, 27&deg;, and 32&deg;C),concentration of algal food Scenedesmus acutus (0.03, 0.05, 0.1, 0.25, 0.5, and 1.OmgC.1) and turbidity (10, 20, and 50 NTU). Animals were examined daily throughout their cycle from the newborn (neonate) to 3rd adult instars. The ecology of planktonic animals in Lake Jacaretinga was studied intensively during a three month period (February, March and April 1986). This period of study included two ecologically/limnologically important periods, namely, before the flooding of the River Amazon and after the river flooding, when the lake became more turbid due to suspended particles. Weekly samples of zooplankton providedinformation on the species composition and numerical density of the cladoceran populations as well as their horizontal distribution in five stations. Information was also obtained on environmental condition in the lake (temperature, dissolved oxygen concentration, Secchi disc transparency, chlorophyll-a and particulate carbon concentration). Population of Diaphanosoma sarsi, Ceriodaphnia cornuta and Daphniagessneri, decreased during the flood, and populations of Moinareticulata increased and became a dominant species. Life cycle experiments shows that growth and reproduction are greatly influenced by food concentration and turbidity. Consistent differences were found between Daphnia gessneri and Moina reticulata,being Moina reticulata more successful in survival, growth and reproduction. Application of the experimental results on the effects of food, temperature and turbidity on the life cycle characteristics of the planktonic cladocerans are used to interpret the changes in the cladoceran population in Lake Jacaretinga during this period of floading. This is a significant contribution to our knowledge since Lake Jacaretinga is one of the characteristic varzea lakes in Central Amazonia whose limnology is largely determined by the annual flooding of Amazon River.
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Frost, Christopher John. "Comparing attitudes about forests between young adults in north-central Florida and the Peruvian Amazon." [Florida] : State University System of Florida, 2000. http://etd.fcla.edu/etd/uf/2000/ana6139/thesisforpublic.pdf.

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Thesis (M.S.)--University of Florida, 2000.<br>Title from first page of PDF file. Document formatted into pages; contains xvi, 275 p.; also contains graphics. Vita. Includes bibliographical references (p. 263-274).
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Cossio-Solano, Rosa E. "Land use of riparian zones in two communities in the Palcazu basin, central Andean Amazon, Peru." FIU Digital Commons, 2001. http://digitalcommons.fiu.edu/etd/2645.

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The purpose of this study was to compare outcomes in forms of riparian zone land use between a native and a colonist community of the Palcazu basin in Peru. Data were gathered through a survey of 79 settler households and an ethnographic study. The results showed that riparian zones are highly valued for the conservation of fertile lowland soils by both communities. Statistical tests showed that riparian land use practices (including non-riparian land use) in both communities are similar; only significant differences were found in the percentage of protection fringe forested, in the area of riparian zone under use and in the importance of riparian zones for the householders. Contextual circumstances in both communities are similar and markets are distant. My research also suggests that there is nothing inherent in the culture of either Yanesha peoples or colonists that leads them to open more or less agricultural land.
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Neves, Eduardo Góes. "The Formative that Never Ended: The Long History of Stability in Human Occupations in the Central Amazon." Pontificia Universidad Católica del Perú, 2012. http://repositorio.pucp.edu.pe/index/handle/123456789/113469.

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The beginnings of human occupation of the Amazon go back to the Pleistocene-Holocene transition. Already at 8500 BP there are signs of human occupation in different settings, both riverine and hinterland, throughout the whole basin. The beginnings of ceramic production may be early as well, with dates possibly from the eighth millennium BP and certainly from the sixth millennium BP. Paradoxically, however, with the exception of localized areas, the archaeological record of the middle Holocene across the Amazon is characterized by large hiatuses with few if any signs of human occupation. Hence, although there are signs of continuous human occupation and population aggregation starting at 4500 BP at places such as the Upper Madeira, the Upano basin and the mouth of the Amazon, these seem to be isolated phenomena since no corresponding developments are seen at the same time elsewhere in the Amazon. It is rather later, from around the anno domini on, that a widespread and visible pattern of population growth, site aggregation and noticeable anthropic landscape changes become visible. These changes are matched, in the archaeological record, by the sudden appearance of large sites with deep stratified ceramic deposits associated with anthropic dark soils, raised fields and causeways, large villages surrounded by moats and connected by road networks and of artificial residential and funerary mounds associated with elaborated pottery, quasi-urban settlement systems, polished stone statuettes, long-range trade networks, and the construction of circular megalithic structures. Do theses hiatuses mean that the Amazon basin was scarcely occupied during the mid-Holocene? Is there a taphonomic bias towards the destruction or poor visibility of sites dating from this interval? Can these apparent hiatuses be correlated with events of climatic change? Current data from pollen records, carbon isotopes in stable organic matter, and fluvial geomorphology show that the mid-Holocene in the Amazon could have been drier than the present. If this is true, it is likely that many of the archaeological sites from this time are either destroyed, under water or under tons of alluvial sediment. Conversely, it is also possible that dryness and changes in water level and forest cover may have had a direct impact in human occupation, explaining the changes observed in the archaeological record.<br>Los inicios de la ocupación de la Amazonía se remontan a la transición entre el Pleistoceno y el Holoceno. Ya hacia 8500 a.p. existen indicios de ella en diversos asentamientos, tanto ribereños como del interior, a lo largo de toda la cuenca. Los comienzos de la producción cerámica también pueden ser tempranos, con fechas, posiblemente, del octavo milenio a.p. y, con certeza, del sexto milenio a.p. Sin embargo, de manera paradójica, con la excepción de algunas áreas, el registro arqueológico del Holoceno Medio a lo largo de la Amazonía se caracteriza por grandes lagunas con pocas evidencias, o ninguna, de presencia del hombre. Por lo tanto, si bien hay señales de ocupación humana continua y la congregación de gente se inicia hacia 4500 a.p. en lugares como el alto Madeira, la cuenca del Upano y la desembocadura del Amazonas, estas parecen constituir fenómenos aislados, ya que no se observan desarrollos correspondientes en otras partes de la Amazonía al mismo tiempo. Más bien, es aún más tarde, desde alrededor de los inicios de nuestra era en adelante, que se hicieron visibles un crecimiento notable y generalizado de la población, la aglutinación de sitios y transformaciones evidentes en el paisaje antrópico. Estas corresponden, en el registro arqueológico, a la aparición súbita de conjuntos de mayores dimensiones, con profundos depósitos estratificados de cerámica asociados con tierras antrópicas de color oscuro, campos de cultivo y caminos elevados, grandes aldeas rodeadas por fosos y conectadas por redes de caminos, montículos artificiales residenciales y mortuorios asociados con cerámica elaborada, sistemas de asentamientos casi urbanos, estatuaria de piedra pulida, redes de comercio de largo alcance y la construcción de estructuras megalíticas circulares. ¿Significan estos vacíos que la cuenca del Amazonas estaba apenas habitada durante el Holoceno Medio? ¿Existe una predisposición hacia la destrucción o pobre visibilidad de los sitios de este intervalo temporal? ¿Se les puede correlacionar con eventos de cambios climáticos? Los datos actuales obtenidos de registros y estudios de polen, análisis de isótopos de carbón en materiales orgánicos estables y estudios de geomorfología fluvial muestran que el Holoceno Medio en la Amazonía pudo haber sido más seco que en el presente. Si esto es verídico, es probable que los yacimientos arqueológicos de esta etapa estén destruidos, bajo el agua o bajo toneladas de sedimento aluvial. De manera inversa, también es posible que las alteraciones en el nivel del agua y la cubierta boscosa puedan haber tenido un impacto directo en los grupos humanos en cuestión, lo que explicaría los cambios visibles en el registro arqueológico.
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Abizaid, Christian. "Floodplain dynamics and traditional livelihoods in the upper Amazon : a study along the central Ucayali River, Peru." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102779.

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Poor people in rural areas of developing countries are considered to be particularly vulnerable. Research shows that the rural poor tend to live in risky environments and face greater difficulties coping because they are excluded from formal safety nets and have few assets. Today, there is much concern that risk, especially environmental risk, contributes to perpetuate poverty and threatens livelihood security, yet our understanding of the implications of environmental risk for rural livelihood remains incipient. This dissertation explores peasant livelihood within the context of environmental change through a study of peasant responses to rapid river changes along the Central Ucayali River, a highly active meandering river and a major Amazon tributary in Peru.<br>Livelihood responses to floodplain dynamics were examined using the case of a recent meander cut-off near the city of Pucallpa as a "natural experiment." Participant observation and a household survey with 68 ribereno households, in three different villages upstream and downstream from the cut-off, served to investigate: (1) livelihood before and after the cut-off; (2) the role of humans in facilitating the cut-off, (3) land tenure; and (4) the links between shocks and asset evolution.<br>Descriptive analysis indicates that riberenos modified their livelihoods in response to the biophysical changes attributed to the cut-off and derived important economic opportunities. Results suggest that riberenos actually intervened to facilitate the cut-off to reduce travel time and make boat travel safer. Despite the potential for unclear rights and overlapping claims, due to land instability and the coexistence of formal and customary tenure rules, land disputes did not result in physical violence. Examples from two villages were used to illustrate how tenure rules are renegotiated as the resource base expands or contracts. Descriptive and statistical analyses show that riverbank slumps were the main form of risk along the Ucayali and, despite their direct effect on land holdings, environmental shocks did not necessarily constrain land accumulation or increase inequality. This study argues that environmental risk can increase vulnerability and reduce welfare but, under certain circumstances it creates new opportunities for rural people in developing countries. The implications of these findings for vulnerability reduction, human adaptation to environmental change, and Amazonian cultural ecology are discussed.<br>Les populations pauvres des regions rurales des pays en développement sontconsidérées comme étant particulièrement vulnérables. Les recherches passées ontdémontré que les membres de ces populations tendent à vivre dans des environnements àrisques et font face à de plus grands défis parce qu'exclus du filet de sécurité socialeformel et parce que possédant comparativement moins de biens mobiliers et immobiliers.Aujourd'hui, de beaucoup s'inquiètent de la contribution de ces risques, en particulier desriques environnementaux, à perpétuer la pauvreté et du danger qu'ils posent pour lemaintient des modes de vie. Malgré ces inquiétudes, notre compéhension desimplications des risques environnementaux pour les modes de vie ruraux demeure faible.Cette dissertation explore le mode de vie paysan en période de changementsenvironnementaux. Il s'agit d'une étude de la réponse des paysans du moyen Ucayali auxrapides changements dans la dynamique du fleuve. L'Ucayali est un affluent majeur dufleuve Amazone, au Pérou.
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Castro, Marcio Walter de Moura. "A cronologia dos sítios Lago do Iranduba e Laguinho à luz das hipóteses da ocupação humana para a Amazônia Central." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/71/71131/tde-21102009-104015/.

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Esta dissertação descreve as atividades realizadas durante duas etapas de escavações em 2006 e 2007 nos sítios Lago do Iranduba e Laguinho, ambos localizados no município de Iranduba (AM), e apresenta os resultados e conclusões oriundas desta pesquisa. Buscou-se, desde a primeira intervenção, compreender os padrões de uso, ocupação e abandono dos sítios, além de estabelecer uma cronologia baseada em datações relativas e absolutas. As pesquisas realizadas pelo PAC (Projeto Amazônia Central) em sítios na região sugerem um ápice demográfico da ocupação humana pré-colonial na Amazônia central durante o fim do primeiro milênio DC. Confirmar esse clímax ocupacional nos sítios Lago do Iranduba e Laguinho é o principal objetivo desta pesquisa. Para testar esta hipótese, investigamos as informações contidas no material cerâmico, sobretudo diagnosticando-o em relação às fases já estabelecidas para a região. Interpretamos também as feições e montículos como correlatos materiais destas ocupações humanas. Sugerimos nesta dissertação um método de classificação das feições baseada em seu conteúdo, morfologia e volume, que gerou uma tipologia; e calculamos o volume dos grandes montículos do sítio Laguinho para discorrer sobre sua monumentalidade e criar quadros hipotéticos sobre o esforço humano envolvido em sua construção. Nesta pesquisa identificamos duas ocupações humanas no sítio Lago do Iranduba, relacionadas às fases cerâmicas Paredão e Guarita. No sítio Laguinho foram identificadas três ocupações distintas, relacionadas à cerâmica das fases Açutuba, Paredão e Guarita. Através das datações absolutas e relativas e da interpretação do registro arqueológico confirmamos a hipótese do apogeu demográfico, ocorrido no fim do primeiro milênio na Amazônia central, por grupos fabricantes da cerâmica Paredão. Ocupação humana responsável pelas principais modificações da paisagem, representadas na construção dos grandes montículos e da maior parte das feições no sítio Laguinho.<br>This dissertation describes the two excavation seasons in 2006 and 2007, in Lago do Iranduba and Laguinho sites, both in Iranduba city, estate of Amazonas - Brazil; and presents the results and conclusions of this research. Since the first archaeological intervention, we have been trying to comprehend the patterns of use, occupation and abandon of the sites and to establish a chronology based on relative and absolute dates. The research developed by PAC (Central Amazon Project) in the region sites suggests a demographical apex in the pre-colonial occupations in central Amazon during the end of the first millennium AD. To confirm this climax in the occupations in Laguinho and Lago do Iranduba sites is the main goal of this research. To test this hypothesis, we investigate the data enclosed in the ceramics to diagnose it in accordance with the ceramic phases already established to the area. The features and the mounds were also considered correlated materials of these human occupations. We suggest in this dissertation a classification method for features that rely on its content, morphology and volume, and create a typology; we also calculate the volume of the larger mounds of Laguinho site to discuss its monumentality and develop simulations about human effort involved on its construction. In this research we identified two occupations in Lago do Iranduba site, related to Paredão and Guarita phases. In Laguinho site three different occupations were identified, related to Açutuba, Paredão and Guarita phases. Through the absolute and relative dates and the interpretation of the archaeological record we confirm the hypothesis of demographic apogee occurring in the en of the first millennium in central Amazon, by groups that manufactured the ceramics classified as Paredão phase. The same human occupation is responsible for the major changes in the landscape, represented on the building of the large mounds and most of the features.
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Books on the topic "Central Amazon"

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Junk, Wolfgang J., ed. The Central Amazon Floodplain. Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03416-3.

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J, Junk Wolfgang, ed. The central Amazon floodplain: Ecology of a pulsing system. Springer, 1997.

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Julie, Byrd, ed. Sell on Amazon: A guide to Amazon's Marketplace, Seller Central, and Fulfillment by Amazon programs. Stephen W. Weber, 2008.

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J, Junk Wolfgang, ed. Central Amazon floodplain: Actual use and options for a sustainable management. Backhuys Publishers, 2000.

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Junek, Bruce B. Andes to the Amazon: Seven journeys in Mexico, Central and South America. Images of the World, 1999.

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Verswijver, G. Club-fighters of the Amazon: Warfare among the Kaiapo Indians of Central Brazil. Rijksuniversiteit teGent, 1992.

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Leonel, Mauro. Roads, Indians and the environment in the Amazon: From Central Brazil to the Pacific Ocean. IWGIA, 1992.

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Mark, Greenberg, ed. Amazon diary: Property of Alex Winters. Putnam & Grosset Group, 1998.

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Mark, Greenberg, ed. Amazon diary: Property of Alex Winters. Putnam, 1996.

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Talbott, Hudson. Amazon diary: [the jungle adventures of Alex Winters]. Viking/Puffin, 1997.

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Book chapters on the topic "Central Amazon"

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Queiroz, Helder L. "Protected Areas of Sustainable Use, Involvement of Social Actors, and Biodiversity Conservation in the Várzea: The Case of the Mamirauá Reserve—Sharing Conservation Benefits in Central Amazonia, Brazil." In The Amazon Várzea. Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-94-007-0146-5_17.

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Gotal Dmitrovic, Lovorka. "The Amazon of Central Europe—the Drava River." In Environmental Science and Technology: Sustainable Development. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-27431-2_3.

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Teixeira, Wenceslau Geraldes, Götz Schroth, Jean Dalmo Marques, and Bernd Huwe. "Unsaturated Soil Hydraulic Conductivity in the Central Amazon: Field Evaluations." In Application of Soil Physics in Environmental Analyses. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06013-2_13.

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Zanchi, Fabrício Berton. "Soil Carbon and the Carbon Cycle in the Central Amazon Forest." In Igapó (Black-water flooded forests) of the Amazon Basin. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-90122-0_4.

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Scarano, Fabio Rubio, Reinaldo Luiz Bozelli, André Tavares Corrêa Dias, et al. "Twenty-Five Years of Restoration of an Igapó Forest in Central Amazonia, Brazil." In Igapó (Black-water flooded forests) of the Amazon Basin. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-90122-0_15.

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Julião, Genimar R., Eduardo M. Venticinque, and G. Wilson Fernandes. "Influence of Flood Levels on the Richness and Abundance of Galling Insects Associated with Trees from Seasonally Flooded Forests of Central Amazonia, Brazil." In Igapó (Black-water flooded forests) of the Amazon Basin. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-90122-0_7.

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Neves, Eduardo Goés, James B. Petersen, Robert N. Bartone, and Michael J. Heckenberger. "The Timing of Terra Preta Formation in the Central Amazon: Archaeological Data from Three Sites." In Amazonian Dark Earths: Explorations in Space and Time. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05683-7_9.

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Neves, Eduardo Góes. "Was Agriculture a Key Productive Activity in Pre-Colonial Amazonia? The Stable Productive Basis for Social Equality in the Central Amazon." In Human-Environment Interactions. Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4780-7_16.

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Resende, Tales Carvalho, and Avenir Geradine Meikengang. "Regional cooperation for the conservation of biodiversity in the Congo Basin forests: Feedback on actions carried out in the TRIDOM-TNS landscapes." In Managing Transnational UNESCO World Heritage sites in Africa. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-80910-2_12.

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AbstractBiodiversity does not adhere to political boundaries. Globally, more than 50% of all terrestrial species have a range that crosses an international border. This includes more than 50% of all mammals, 25% of all amphibians and almost 70% of all birds. Of the threatened species, over 20% had a transboundary range (Mason et al., 2020). Covering a total area of more than 1.5 million km2 in six Central African countries (Cameroon, Gabon, Equatorial Guinea, Central African Republic, Republic of Congo and Democratic Republic of Congo), the so-called Congo Basin forests are the second largest tropical forest in the world after the Amazon Basin. They form the most diverse assemblage of plants and animals in Africa, and are home to some 10,000 species of plants, 1,000 birds, 700 fish and 400 mammals, including many iconic species such as forest elephants, lowland gorillas and chimpanzees. Currently, almost 15% of the total forest area of the Congo Basin has protected area status. The management of these protected areas is now based on a new paradigm: the landscape conservation approach. Twelve landscapes have been identified as priorities in the Congo Basin because of their relative taxonomic importance, overall integrity, and the resilience of the ecological processes they represent. Among these landscapes, the TRIDOM (Trinational Dja-Odzala-Minkébé) (Cameroon, Congo and Gabon) and TNS (Trinational Sangha) (Cameroon, Congo and Central African Republic) stand out as hosting the majority of the last remaining forest elephants, lowland gorillas and chimpanzees in Central Africa. The presence of four of the eight natural World Heritage sites in the Congo Basin forests testifies to the exceptional importance of these two contiguous transboundary landscapes. This article will review the evolution of regional cooperation for the conservation of biodiversity in the Congo Basin forests by providing feedback on actions carried out in the TRIDOM and TNS landscapes.
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Saes, Beatriz Macchione. "Ecologically Unequal Exchange: The Renewed Interpretation of Latin American Debates by the Barcelona School." In Studies in Ecological Economics. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-22566-6_13.

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AbstractThe ecological perspective of unequal exchange between core and peripheral countries or regions has been discussed at least since the 1980s, when Stephen Bunker analysed how the lack of political power in the Brazilian Amazon extractivist areas led to an unequal distribution of extraction costs and benefits, favouring central importing regions. Subsequent contributions are based on different theoretical perspectives, from Marxist and world-system approaches to thermodynamics and Odum’s energy framework. In Barcelona School of Environmental Social Science, researchers and students led by Joan Martínez-Alier have contributed empirically and theoretically to the ecologically unequal exchange approach advancement since the mid-1990s. This chapter analyses those contributions, highlighting their original interpretation of Latin American debates and theories. I discuss how the debate over the external debt in Latin America – which seriously affected these countries in the 1980s – and the main theories of the Economic Commission for Latin America and the Caribbean (ECLAC), have decisively influenced the unequal trade theoretical and empirical works developed at the Institute of Environmental Science and Technology (ICTA-UAB). Firstly, these works reinforced the Latin American environmental justice organizations’ claim for the recognition of an ecological debt from Global North to Global South. Secondly, they provided a renewed interpretation of ECLAC economist Raúl Prebisch’s hypothesis that trade terms are structurally unfavourable to peripheral countries.
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Conference papers on the topic "Central Amazon"

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Quinche Bravo, Oscar Vinicio, Elvis Michael Salinas Guaman, Freddy Campoverde Armijos, Fausto García Márquez, and Mónica Karel Huerta. "Development of Photovoltaic Systems for Indigenous Communities in Amazonia." In 2024 IEEE 42nd Central America and Panama Convention (CONCAPAN XLII). IEEE, 2024. https://doi.org/10.1109/concapan63470.2024.10933905.

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Ansart, Claire, Cécile Gautheron, Djamila Demri, et al. "Record of Cenozoic weathering episodes in central Amazon basin." In Goldschmidt2021. European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.5063.

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""COLLABORATIVE LEARNING IN STEAM TEACHING FOR STUDENTS IN THE CENTRAL AMAZON"." In International Conferences on E-Society 2023 and Mobile Learning 2023. IADIS Press, 2023. http://dx.doi.org/10.33965/es_ml2023_202302p068.

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Fairhead, J. D., S. E. Williams, V. Lesur, M. F. Mushayandebvu, and O. B. De Paula. "Testing Extended Euler Deconvolution on the Central Amazon Geophysical Anomaly, Brazil." In 63rd EAGE Conference & Exhibition. European Association of Geoscientists & Engineers, 2001. http://dx.doi.org/10.3997/2214-4609-pdb.15.p212.

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Feitl, Melina, Sherilyn C. Fritz, Xavier Benito Granell, and Miriam Steinitz-Kannan. "CHARACTERIZING SHORT-TERM (1970-PRESENT) LAKE CHANGE IN THE HIGH-MOUNTAIN TROPICS AND AMAZON OF ECUADOR." In 52nd Annual North-Central GSA Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018nc-312294.

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P. Soares, José Eduardo, Lucas Coutrim C. P. Caridade, and Reinhardt A. Fuck. "Geophysical characteristics of the Neoproterozoic Amazon Plate-Tocantins Province suture in central Brazil." In Simpósio Brasileiro de Geofísica. Sociedade Brasileira de Geofísica, 2010. http://dx.doi.org/10.22564/4simbgf2010.096.

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Eduardo P. Soares, José, Lucas Coutrim C.P. Caridade, and Reinhardt A. Fuck. "Geophysical Characteristics Of The Neoproterozoic Amazon Plate-Tocantins Province Suture In Central Brazil." In IV Simpósio Brasileiro de Geofísica. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609-pdb.197.sbgf_2395.

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Hess, L. L., and J. M. Malack. "Mapping floodplain vegetation in the central Amazon basin with multi-temporal SIR-C data." In IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174). IEEE, 1998. http://dx.doi.org/10.1109/igarss.1998.703758.

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Moreira, Tayana, D. N. Brandao, D. B. Haddad, M. B. Ceddia, E. F. M. Pinheiro, and R. F. Oliveira. "A first approach using neural network to estimating soil bulk density of Urucu basin in Central Amazon-Brazil." In 2017 International Joint Conference on Neural Networks (IJCNN). IEEE, 2017. http://dx.doi.org/10.1109/ijcnn.2017.7966260.

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Barragán Jaimes, Jessica Alejandra, and William Schnaider Torres Bermón. "APLICACIÓN WEB PARA LA ADMINISTRACIÓN DE LA INFRAESTRUCTURA DE RED Y TELECOMUNICACIONES DEL CAMPUS CENTRAL DE LA UNIVERSIDAD FRANCISCO DE PAULA SANTANDER EN LA SEDE CÚCUTA." In La formación de ingenieros: un compromiso para el desarrollo y la sostenibilidad. Asociacion Colombiana de Facultades de Ingeniería - ACOFI, 2020. http://dx.doi.org/10.26507/ponencia.833.

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La administración de la infraestructura de red y telecomunicaciones de la Universidad Francisco de Paula Santander seccional Cúcuta, es la labor realizada por el Centro de Servicios de Información (CSI). En base a un conjunto de problemáticas asociadas a tan importante labor, se planteó el diseño y desarrollo de una aplicación web que permitiera centralizar e integrar la información generada en los procesos de instalación, configuración, control, soporte y mantenimiento de los diferentes dispositivos de hardware, cableado estructurado e instalaciones con los que cuenta la universidad en su infraestructura de red, facilitando la toma de decisiones y optimizando la labor realizada por el personal del CSI. El desarrollo del producto de software se llevó a cabo bajo la metodología OpenUp, debido a que es un proceso unificado, iterativo e incremental; promueve la colaboración para alinear los intereses comunes, balancea las prioridades competitivas, se centra en la arquitectura minimizando los riesgos, y favorece la retroalimentación en busca de mejoras. La construcción de la aplicación se basó en tecnologías Open Source. Los desarrolladores hicieron uso del framework Laravel integrado con la herramienta CRUDBooster, MariaDB como Sistema de gestión de base de datos, y para la transición de la aplicación a la comunidad del CSI (despliegue en el entorno de producción) se implementó un servidor virtual en Amazon Elastic Compute Cloud (Amazon EC2).
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Reports on the topic "Central Amazon"

1

Flores, Bernardo M., Adriane Esquivel-Muelbert, Marco Ehrlich, et al. NINE WAYS TO AVOID THE AMAZON TIPPING POINT. Sustainable Development Solutions Network (SDSN), 2023. http://dx.doi.org/10.55161/svvo2555.

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Global greenhouse gas emissions, combined with local deforestation and forest degradation, are pushing the Amazonian system closer to a tipping point. A large-scale Amazon tipping point may trigger the collapse of most forests and consequently: (1) accelerate global warming, hindering efforts to achieve the goals of the Paris Agreement; (2) reduce moisture flow across South America, threatening water security for basic socioeconomic activities, such as agriculture; (3) increase temperatures across the Amazon region that may become unbearable for humans living in urban and rural areas; (4) cause mass species extinctions; and (5) compromise the biological and cultural assets that represent key solutions to the current and future challenges of humanity. Synergies between disturbances may cause unexpected tipping behaviour, even in forest regions previously considered as resilient to climate change, such as the central or western Amazon.
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Vecco Giove, Carlos Daniel. Base de datos de producción de miel Tetragonisca Angustula. Repositorio Institucional de la Universidad Nacional de San Martín, 2023. http://dx.doi.org/10.51252/11458/5089.

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Base de datos para la investigación: "Competence and temporal patterns in the honey production of Tetragonisca angustula (Hymenoptera: Apinae: Meliponini) in a meliponiculture system in the Central Huallaga, Peruvian Amazon"
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Redwood, John. Managing the Environmental and Social Impacts of Major IDB-Financed Road Improvement Projects in the Brazilian Amazon: The Case of BR-364 in Acre. Inter-American Development Bank, 2012. http://dx.doi.org/10.18235/0009054.

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The Environment and Safeguards Group (ESG) of the IDB has examined how potential environmental and social risks of major Bank-supported road improvement investments in natural resource rich and socio-culturally diverse "frontier" regions have been identified and addressed in various parts of South and Central America. The present paper presents the findings and recommendations for selected ongoing and/or completed IDB-financed road and road related projects in Brazil. To the extent possible, the experience and lessons learned from all major parts of the project cycle -- design/preparation, up-front environmental assessment, implementation/supervision, and monitoring and evaluation -- are considered, as are the analysis and management of direct, indirect and cumulative environmental and social impacts.
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Sanabria Castellanos, Cindy Marleyi, Jorge Luis Díaz Moreno, and Hernán Quijada Bonilla. Investigación de brote por COVID-19 en un Centro de Protección de Personas Mayores, Leticia–Amazonas, mayo de 2020. Instituto Nacional de Salud, 2021. http://dx.doi.org/10.33610/01229907.2021v3n1a2.

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Antecedentes: en Leticia, Amazonas, en un Centro de Protección se presentó un brote por COVID-19. El primer resultado confirmado correspondió a una persona mayor con síntomas respiratorios. Objetivo: caracterizar las variables sociodemográficas y epidemiológicas de la población confirmada por COVID-19 en el centro de protección de personas mayores en Leticia, Amazonas en mayo de 2020. Materiales y métodos: se realizó un estudio de brote con diseño descriptivo transversal, en el cual se recolectó información de casos confirmados y probables por COVID-19 en personas de 60 años y más y funcionarios en un Centro de Protección en Leticia, Amazonas. Resultados: el centro de protección presentó 33 beneficiarios, con media de edad de 75,6 años. El 96,8 % (30) de los beneficiarios fue mayor de 60 años, el 70,5 % (12/17) del total de casos confirmados en población beneficiaria presentó síntomas; se identificó una razón de prevalencia 2,25 (IC 95 %: 1,02–4,97). La tasa de ataque en beneficiarios fue 51,6 % y en funcionarios de 48,4 %. Conclusión: las personas mayores alojadas en centros de protección presentan una alta tasa de contagios y muertes asociada a la presencia de comorbilidades y a la inapropiada implementación de protocolos de bioseguridad y cuidado.
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Guiteras, Anna. School Centres for 'Savages': In Pursuit of a Convivial Sociability in the Bolivian Amazon. Maria Sibylla Merian International Centre for Advanced Studies in the Humanities and Social Sciences Conviviality-Inequality in Latin America, 2019. http://dx.doi.org/10.46877/guiteras.2019.16.

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Flores, Bernardo M., Adriane Esquivel-Muelbert, Marco Ehrlich, et al. NUEVE MANERAS DE EVITAR EL PUNTO DE NO RETORNO EN LA AMAZONÍA. Sustainable Development Solutions Network (SDSN), 2023. http://dx.doi.org/10.55161/oqrm8068.

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Las emisiones globales de gases de efecto invernadero, combinadas con la deforestación y degradación forestal local, están empujando al sistema Amazónico más cerca de un punto de un punto de no retorno. Las sinergias entre perturbaciones pueden provocar un comportamiento de ión inesperado, incluso en regiones forestales que antes se consideraban resilientes al cambio climático, como la Amazonia central u occidental.
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Cornelius, J. P. Tree domestication by the World Agroforestry Centre and Partners in the Peruvian Amazon: lesso ns learned and future prospects . World Agroforestry Centre (ICRAF), 2010. http://dx.doi.org/10.5716/wp16850.pdf.

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Giambruno, Cecilia, Nicolás Castro Vergara, and Claudio Paul Ortega Ariza. Nota CIMA #29: ¿qué tan lejos están las oportunidades educativas en la Amazonía? Inter-American Development Bank, 2025. https://doi.org/10.18235/0013435.

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En la región amazónica, 1 de cada 3 niños, niñas y adolescentes vive a más de 2,5 km del centro educativo más cercano, lo que implica al menos una hora de caminata diaria. Los análisis muestran grandes variaciones tanto entre países como dentro de cada uno. Las poblaciones en territorios indígenas, en áreas con alta incidencia de pobreza, y en edad de asistir a educación secundaria enfrentan mayores barreras de acceso, evidenciando la necesidad de mejorar la oferta educativa en ciertos territorios para reducir las desigualdades en la región amazónica.
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Rodríguez Reyes, Andrea Jineth, Deccy González Ruge, and Lissethe Carolina Pardo Herrera. Inicio de una nueva fase epidémica de dengue en Colombia. Instituto Nacional de Salud, 2021. http://dx.doi.org/10.33610/01229907.2021v3n1a1.

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Introducción: en Colombia, el dengue presenta un comportamiento endemoepidémico con brotes cada 3 años y se ha convertido en un problema prioritario en salud pública. Objetivo: describir el comportamiento epidemiológico de dengue en Colombia durante el 2019, para orientar las estrategias de prevención, vigilancia y control. Materiales y métodos: estudio descriptivo de los casos de dengue notificados al Sistema Nacional de Vigilancia en Salud Pública (Sivigila) en Colombia entre la semana epidemiológica 01 a 52 de 2019. Plan de análisis: cálculo de proporciones, tasas, medidas de tendencia central y dispersión. Se calculó los indicadores definidos en el protocolo del evento del Instituto Nacional de Salud. Se identificó los factores relacionados con las muertes por dengue a partir de las unidades de análisis. Resultados: Durante el 2019 se notificaron 124 989 casos de dengue y se confirmaron 122 muertes por dengue. La incidencia a nivel nacional fue de 465,9 casos por 100 000 habitantes, siendo significativamente superior en la población masculina. La mayor proporción de casos se presentó en el grupo de 5 a 14 años. A partir de la semana epidemiológica 08, el evento a nivel nacional presentó una situación de brote sostenido. La región Orinoquía y Amazonía, presentaron las incidencias más altas con 1943,6 casos por 100 000 habitantes y 944,2 casos por 100 000 habitantes, respectivamente. En las muertes por dengue, el principal problema asociado estuvo relacionado con la prestación de los servicios de salud. Conclusión: Colombia inició una nueva fase epidémica de dengue en 2019, con una incidencia superior a la observada en la epidemia de 2016 pero inferior con respecto a los periodos epidémicos 2010 y 2013.
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Goh, Ailsa Ee Ping, Meng Ee Wong, and Carol Soo Ching Tan. Perspectives of stakeholders on youth with intellectual disabilities transitioning to adulthood. National Institute of Education, Nanyang Technological University, Singapore, 2020. https://doi.org/10.32658/10497/22665.

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Abstract:
Transition is difficult for everyone, but it is particularly challenging for youth with disabilities and their families. When these youth transition out of school to post school environments, they will move from a structured environment with clear daily routines, with school personnel who are tasked to teach and support them, to environments where ongoing support and services are not readily available. Some of these youth with disabilities enter work environments that can be impersonal and most of them are unprepared for the level of independence that is required of them (Sitlington, Frank, &amp; Carson, 1992). Many of them will find difficulty forming social networks as an adult and feel isolated in the community (Amado, Stancliffe, McCarron, &amp; McCallion, 2013). Many youth with disabilities leave school with no employment in the near future (Nord, Luecking, Mank, Kiernan, &amp; Wray, 2013) and to further complicate matters, there may be limited places at alternative day activity centres for them (Enabling Masterplan, 2012). These group of youth with disabilities may be inactive, socially isolated, and will continue to rely on family for any social and community interaction (Lichtenstein &amp; Michaelides, 1993; Ow &amp; Lang, 2000).
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