Thesis (M.S.)--Southern Oregon University, 2007 / Computer printout. Includes bibliographical references (leaves 49-53). Also available via Internet as PDF file through Southern Oregon Digital Archives: http://soda.sou.edu. Search Bioregion Collection.

Orientadores: Marcos César Ferreira, Édson Luis Bolfe / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociências / Made available in DSpace on 2018-08-23T13:41:49Z (GMT). No. of bitstreams: 1 Andrade_DanielDiasde_M.pdf: 5558237 bytes, checksum: d148a7a1eabd8b1f1c82c3c7d7641810 (MD5) Previous issue date: 2013 / Resumo: O uso de modelos de estimativa de biomassa através de dados de sensoriamento remoto pode contribuir à geração de conhecimento para a mitigação dos efeitos negativos no clima e na biodiversidade do planeta, oriundos da utilização humana dos recursos naturais. A Área de Proteção Ambiental (APA) Fernão Dias é uma Unidade de Conservação Estadual de Uso Sustentável localizada na Serra da Mantiqueira no Estado de Minas Gerais, próxima à fronteira com o Estado de São Paulo. Por meio da estimativa realizada a partir de dados de campo para a biomassa acima do solo do fragmento denominado "97", coberto por Floresta Ombrófila Madura, e de respostas espectrais detectadas pelo sensor TM do satélite Landsat 5, realizou-se a estimativa do carbono para a cobertura florestal presente no território da APA. O grau de relação entre o Índice de Vegetação ajustado ao solo (SAVI), o Índice de Vegetação pela Razão (SRI), o Índice de Vegetação Melhorado (EVI), o Índice de Vegetação da Diferença Normalizada (NDVI), o Índice de Vegetação Perpendicular (PVI) e os dados de campo foi obtido por meio de equações de regressão linear simples. Foram obtidas correlações distintas entre as variáveis espectrais (índices de vegetação) e os parâmetros biofísicos (carbono): r2 = 0,738; 0,728; 0,721; 0,670; e 0,542, respectivamente. Mapas síntese do estoque de carbono acima do solo (t/ha) foram gerados para as áreas florestadas da APA, delimitados por divisões físicas e político-administrativas. A estimativa se aproximou dos valores amostrados para a biomassa medida em campo, apresentando menor equivalência na medida em que se amplia e se diversifica a área utilizada na estimativa / Abstract: The use of biomass estimation models by means of remote sensing data may contribute to the generation of knowledge for the mitigation of negative effects on climate and biodiversity in the planet, due to the human appropriation of the natural resources. Fernão Dias Environmental Protection Area (APA) is a State Conservation Unit of Sustainable Use located at the Mantiqueira Mountains, Minas Gerais State, nearby the São Paulo State border. Aboveground biomass was estimated for the fragment denominated "97", covered by Mature Evergreen Forest. Landsat 5 imagery was used to map forest cover, so Carbon estimation could be represented for the entire Fernão Dias APA Area. The relationship between Soil Adjusted Vegetation Index (SAVI), Simple Ratio Index (SRI), Enhanced Vegetation Index (EVI), Normalized Difference Vegetation Index (NDVI), Perpendicular Vegetation Index (PVI), and field data was obtained by simple linear regression equations. Distinct correlations for the spectral variables (vegetation indices) and the biophysical parameters (Carbon) were obtained: r2 = 0,738; 0,728; 0,721; 0,670; e 0,542, respectively. Synthetic maps for aboveground Carbon (t/ha) were generated for the Fernão Dias APA's forest areas, delimited by physical and political-administrative divisions. The estimations were similar to the biomass values sampled in the field, presenting smaller equivalences as the area used in the estimation is increased and diversified / Mestrado / Análise Ambiental e Dinâmica Territorial / Mestre em Geografia

Please read the abstract in the section 00front of this document / Dissertation (MSc(Botany))--University of Pretoria, 2005. / Plant Science / unrestricted

A vegetation survey of natural woodland and grassland was undertaken in the urban areas of the Gauteng Province, where 7,3 million of the 38,5 million people of South Africa live. Relevés were compiled in 132 stratified random sample plots in selected open spaces in the study area. A TWINSPAN classification, refined by Braun-Blanquet procedures, indicated six woodland communities represented by 72 relevés, and eight grassland communities represented by 59 relevés. The identification, classification and description of these plant communities are important for the continued conservation of open spaces in the urban environment in order to integrate landscape ecological mapping and urban spatial planning processes. The study further recorded a high number of species. It indicated that the natural areas in the urban environment have a high conservation status and maintain a high species richness. This information could in future be used for further biodiversity studies in the Province. Species with low occurrence were specifically listed and can be used to inform "red data" status research initiatives. / Dissertation (MSc (Botany))--University of Pretoria, 2006. / Plant Science / unrestricted

Please read the abstract in the section 00front of this document / Dissertation (MSc (Botany))--University of Pretoria, 2007. / Plant Science / MSc / unrestricted

In order to understand vegetational gradients which develop in response to environmental gradients, the physiological capabilities of each species must be examined in relation to the observed environmental gradient. The distributions of three temperate zone shrub species which occupy different positions on the spur ridges of Brush Mountain may be influenced by their tolerances to light and moisture. Greenhouse studies indicate that <i>R. maximum</i> has a 60 % reduction in photosynthesis at water potentials below -1.0 MPa. <i>R. nudiflorum</i> has only a 30 % reduction and <i>K. latifolia</i> has less than 10 % reduction. Seasonal pressure volume curve determinations, conductance measurements, and water potential measurements of plants in the natural environment indicated that photosynthesis is not affected by water potential in <i>K. latifolia</i>. <i>R. maximum</i> has a significant reduction in conductance during drought which may limit photosynthesis. R. nudiflorum appears to begin senescence prior to severe drought in this area. Greenhouse experiments of adaptability to increasing light intensity show that <i>K. latifolia</i> and <i>R. nudiflorum</i> can significantly increase their light saturation point and maximum rate of photosynthesis in high light environments. <i>R. maximum</i> does not increase its photosynthesis rate in high light environments and appears to undergo chloroplast degradation when grown in high irradiance. Gradient analysis of vegetation on Brush Mountain shows that <i>R. maximum</i> reaches its highest importance in low light, high moisture sites. <i>K. latifolia</i> is most important in low moisture, high irradiance sites. <i>R. nudiflorum</i> is infrequent in the study area but occurs mostly in moderate moisture and irradiance sites. The distributions of <i>R. maximum</i> and <i>K. latifolia</i> appear to match their experimentally determined physiological tolerances. The results for <i>R. nudiflorum</i> are inconclusive. / Master of Science

The history of wetland regulation, identification, and delineation was researched to examine the current status of wetland assessment. One area of interest was the Natural Resources Conservation Service (NRCS) programs to construct and restore wetlands on previously farmed land. Indices of biotic integrity and other intensive assessment methods such as Floristic Quality Assessments are frequently used to document condition and quality for both natural and constructed wetlands. This research used the Ohio Rapid Assessment Method (ORAM) to evaluate five NRCS wetlands of different ages and an undisturbed natural wetland for comparison. In addition, an intensive vegetative survey was conducted at each wetland to determine the characteristics of the plant community and to create a Vegetation Index of Biotic Integrity (VIBI) based on the Ohio wetland assessment program. The goals of the research were to document the condition of the wetlands, to evaluate the use of the rapid assessment method compared to the more extensive vegetative assessments, and to examine the vegetative composition of the wetlands as a function of age since establishment under the NRCS programs. Scores determined by the ORAM and the VIBI demonstrated a close correlation. ORAM scores also correlated to Floristic Quality Assessment Index scores calculated as part of the VIBI. Scores calculated by the ORAM and VIBI were regressed against the age of the wetland. These assessment scores were not significantly related to age, however lack of significance might have been constrained by the small number of samples. This research demonstrated that the rapid assessment technique used provided results comparable to more intensive methods and could provide a relatively quick and accessible method to monitor wetland condition and development. / Department of Natural Resources and Environmental Management

Dissertation (Ph.D.)--The University of North Carolina at Greensboro, 2008. / Title from PDF t.p. (viewed Aug. 10, 2009). Directed by Roy Stine; submitted to the Dept. of Geography. Includes bibliographical references (p. 154-165).

As part of a vegetation survey program for the newly acquired farms incorporated into the Loskop Dam Nature Reserve, the vegetation of the Hondekraal Section was investigated. The study provides an ecological basis for establishing an efficient wildlife management plan for the Reserve. From a TWINSPAN classification, refined by Braun-Blanquet procedures, 12 plant communities, which can be grouped into eight major plant communities, were identified. A classification and description of the major plant communities are presented as well as a management plan. Descriptions of the plant communities include characteristic species as well as prominent and less conspicuous species of the tree, shrub, herb and grass strata. This study proves that the extended land incorporated into the Reserve contributes to the biological diversity of the Reserve. / Environmental Sciences / M. Tech. (Nature Conservation)

The natural vegetation of the Cradle of Humankind World Heritage Site (COH WHS) was classified using Braun-blanquet methodology. This identified 22 distinct plant communities and 2 variants. Sampling took place over two growing seasons with a total of 91 releves being compiled. A stratified random approach to sampling used Land Types as a means of primary area stratification, with terrain position providing the means for further refinement. The grassland comprised of 12 plant communities and 2 variants and the woodland comprised of 10 plant communities. The classification of the woodland areas included some bush clumps associated with the entrances of caves which were also described independently in which seven distinct plant communities were identified A positive linear correlation exists between the size of the cave entrances and the extent to which the surrounding woody vegetation extends. This suggests the likelihood of cave entrance size influencing the surrounding vegetation. / Environmental Sciences / M. Tech. (Nature Conservation)