Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 174 for “"rainforest"”.
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Antiproliferative Natural Products from the Madagascar Rainforest
… anticancer natural products from the Madagascar rainforest, twenty extracts from Madagascar were selected for investigation based on their antiproliferative activity. Bioassay-guided fractionation of five of the extracts yielded sixteen new compounds, and their structures were determined using a …
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Diversity of geometrid moths in a montane rainforest in Ecuador
The diversity of the very species-rich family of geometrid moths was investigated in a montane forest at the border of the Podocarpus National Park in southern Ecuador along an altitudinal gradient ranging from 1,040 m to 2,677 m above sea level. This study is part of a larger interdisciplinary …
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Late Cainozoic rainforest vertebrates from Australopapua: evolution, biogeography and extinction
… flora and fauna. In particular, mesothermic rainforest faunas are among Australia‟s most vulnerable terrestrial biota under threat from both natural and anthropogenic causes. There is a gap in knowledge of past patterns of change and, in particular, a conspicuous lack of direct evidence of …
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Comparing density analyses and carnivore ecology in Madagascar's southeastern rainforest
… and 3) explore temporal activity patterns of rainforest carnivores. I found the spatially-explicit-capture-recapture models were empirically superior, as they are flexible and account for spatial variation in detection probability and area estimation. I found both endemic and exotic carnivore …
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Isolation, Characterization, and Synthesis of Bioactive Natural Products from Rainforest Flora
… ongoing investigations for anticancer drugs from rainforestflora, five plant extracts were determined to contain interesting bioactivity. These extracts were subjected to various separation techniques, affording a number of bioactive compounds that were then characterized by spectral and …
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The development of selling sustainability in saving The Great Bear Rainforest
Thesis (M.A.)--Michigan State University. Public Relations, 2010
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Comparative Phylogeography of Glassfrogs (Vitreorama) Endemic to the Brazilian Altantic Rainforest
<p>The Brazilian Atlantic Forest harbors one of the most diverse faunas of the world, including 2-3% of all known vertebrate species. Understanding the role of both climate and landscape in shaping current biodiversity patterns has been the focus of many recent phylogeographic studies. Here I …
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Idea and community : the growth of David Tudor's Rainforest, 1965-2006
David Tudor's sound work Rainforest was created in four distinct versions between 1968 and 1973. The work's central concept is the use of various resonant objects as loudspeakers, or "acoustic filters", to modify sounds from numerous sources which are played through the objects. The author traces …
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Investigating the efficiency of reforestation approaches in restoring rainforest biodiversity and function
… was clearly progressing towards that of rainforest with increasing restoration age. Restoration increased dung beetlemediated secondary seed dispersal, leaf litter decomposition rates and decomposition multifunctionality (dung and litter decomposition). Functional trait-based metrics …
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Trees and people : an anthropology of British campaigners for the Amazon Rainforest
… and campaigns for the Brazilian Amazon rainforest in the 1990s. It is the result of over two and a half years investigation amongst campaigners in environmental, social and human rights organisations in the UK. My approach combines different theoretical and methodological perspectives, …
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Poison frog warning signals: From the rainforest to the genome and back again
Signal communication is pervasive in nature and is used to convey information to both conspecifics and heterospecifics. Aposematic species use warning signals (e.g. bright coloration) to alert predators to the presence of a secondary defense (e.g., spines, toxins, etc). The presence of a …
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Searching for Anticancer Natural Products From the Rainforest Plants of Suriname and Madagascar
Through the ICBG (International Cooperative Biodiversity Group) program and a continuing search for anticancer compounds, plant extracts were obtianed from Suriname and Madagascar and screened for cytotoxic activity in the A2780 human ovarian cancer cell line. Fractionation of a leaf and flower …
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How availability and quality of nectar and honeydew shape an Australian rainforest ant community
… sources were studied in a tropical lowland rainforest in North Queensland, Australia. The study focused on the hypothesis whether the distribution and composition of nectar and honeydew diets influence resource partitioning and competition in the ant community, and thus regulate community …
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Storm Response and Water Balance of Temperate Rainforest Karst Watersheds: Tongass National Forest, Alaska
The Tongass National Forest in southeast Alaska contains 2,176 square kilometers of karst. As part of the evolving Tongass Land Management Plan, research into the function of karst systems is crucial in understanding how forest management affects not only karst areas but also surrounding …
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Navigating in a Rainforest: Movement Patterns in a Neotropical Primate. The Black Howler Monkey
Navigating rainforests requires a continuous integration and processing of socio-ecological information. To incorporate such information into movement decisions, animals have evolved different cognitive mechanisms that enhance their spatial performance and foraging effort across heterogeneous …
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