• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The Effects of Habitat Management on Wildlife Use in a Managed Loblolly Pine Forest

McCollum, Johannah Reed 10 August 2018 (has links)
To improve habitat quality for wildlife, habitat managers prescribe various disturbances. Habitat management techniques alter the vegetation structure, composition, and quality, changing food and cover resources and availability. To investigate how habitat management and vegetation heterogeneity affect space use by wildlife species, I deployed 81 camera-traps and collected fine scale vegetation data across a variety of treatments (i.e., canopy reduction, prescribed fire, and herbicide application) in a managed loblolly pine forest. I created a new method for accounting for imperfect detection and error in camera count data. My method provided better inference about the effects of variables on animal use. Species responded differently to different functional groups of plants, but predicted use from generalized additive models showed higher use in the most intensively managed pine stands, indicating that management promotes animal use by improving habitat quality. Animals used every treatment, indicating the need for heterogeneity in resources when managing wildlife.
2

Demanda e intensidade do uso de materiais básicos em economias recentemente industrializadas

Souza, Daniela Tatiane de 08 November 2013 (has links)
Made available in DSpace on 2016-06-02T19:50:21Z (GMT). No. of bitstreams: 1 5594.pdf: 3003572 bytes, checksum: 55948c291893c82b40741ea96ada20fa (MD5) Previous issue date: 2013-11-08 / Universidade Federal de Minas Gerais / This thesis aims to assess the evolution of the long-term dynamics of demand for basic materials caused by the growth of some newly industrialized countries, especially China. The underlying assumption is that the demand for materials may vary according to the level of economic development. One of the possible effects of Chinese growth on the Brazilian economy is the re-insertion into the world economy through the supply of basic commodities. Despite strong dynamical effects that the growth of demand for these materials has exercised in this century on several economies producing these goods, it remains the question about the long-term continuity of this movement. The historical experience of the most advanced countries points to the prospect of decrease in intensity of use of some materials as a result of changes in consumption patterns. It should therefore assess whether, in a wider horizon, this reduction can spread through some newly industrializing economies and limit the dynamism whose international insertion is specialized in supplying these materials. For this, the research methodology relied on reviews of the literature on the theory of development and intensity of materials use in countries with different degrees of industrialization. Moreover, empirical surveys allowed to compose a framework of quantitative information for paper and paperboard, steel, cement and aluminum that served as input for the construction of indicators of intensity of use. The conclusions of the study point to a decrease in the intensity of use in developed countries, featuring an ongoing process of dematerialization. Already in some newly industrializing economies like China, in two of the four studied materials - cement and steel - the perspective is clearly exhaustion of the dynamism due to the growth in Chinese consumption. / Esta tese tem o objetivo de avaliar a evolução do dinamismo de longo prazo da demanda de materiais básicos de uso industrial, ocasionado pelo crescimento de alguns países recentemente industrializados, principalmente a China. A hipótese subjacente é que o dinamismo da demanda de materiais varia segundo o nível de desenvolvimento econômico. Um dos efeitos do crescimento chinês sobre a economia brasileira foi o reforço da inserção na economia mundial por meio da oferta de commodities básicas. Apesar dos fortes efeitos dinamizadores que o crescimento da demanda desses materiais tem exercido neste início de século sobre várias economias produtoras desses bens, permanece a interrogação sobre a continuidade no longo prazo desse movimento. A experiência histórica dos países mais avançados aponta para uma perspectiva de diminuição da intensidade do uso de alguns materiais, como resultado de inovações tecnológicas e modificações nos padrões de consumo. Cabe, portanto, avaliar se, em um horizonte temporal mais largo, tal redução pode difundir-se através de algumas economias de industrialização recente e limitar o dinamismo de uma inserção internacional especializada na oferta desses materiais. Para isso, a metodologia da pesquisa se apoiou em revisões da literatura sobre a teoria do desenvolvimento e intensidade do uso de materiais em países com graus diferenciados de industrialização. Ademais, levantamentos empíricos permitiram compor um quadro de informações quantitativas para papel e papelão, aço, cimento e alumínio, os quais serviram de subsídio para a construção de indicadores de intensidade do uso. As conclusões do trabalho apontam para uma queda na intensidade do uso nos países desenvolvidos, caracterizando um processo de desmaterialização em curso. Já em algumas economias de industrialização recente como a China, em dois dos quatro materiais estudados - cimento e aço - a perspectiva é claramente de esgotamento do dinamismo decorrente do crescimento do consumo chinês.

Page generated in 0.0575 seconds