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 17 of 17 for “"Tropical rain forests"”.
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Species Richness and Ecological Diversity of Myxomycetes and Myxomycete-Like Organisms in the Tropical Forests of Brazil
<p>Tropical rain forests cover less than two percent of Earth's surface, yet they sustain the greatest diversity of living organisms on the planet. Tropical rain forests cover nearly 73% of the Brazilian territory and besides harboring some of the most biodiverse ecosystems on the planet, this vast …
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Analysis of a Middle Pennsylvanian Channel Complex in Pikeville, Kentucky
… Middle Pennsylvanian rivers flowed through tropical rain forests with a high concentration of sediments, and a significant portion of that flux could have been particulate organic carbon derived from the densely vegetated forests. Removal of surficial carbon might have contributed to climate …
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THE IMPACT OF FOREST SUCCESSIONAL STATUS ON COMMUNITY STRUCTURE OF NEOTROPICAL CERAMBYCID BEETLES
<p>Due to anthropogenic activities, tropical rain forests face many challenges in sustaining biodiversity and maintaining global climates. This project examines how forest successional status affects community composition of saproxylic cerambycids, which, as early colonists of moribund trees, have …
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Effects of different canopy tree species on belowground biogeochemistry in a wet lowland tropical forest
Tropical rain forests are known for their tremendous biological diversity, but the effects of plant diversity on important ecosystem processes remain unclear. Interspecies differences in both the demand for nutrients and in foliar nutrient concentrations could drive differences in litter chemistry …
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Effects of different canopy tree species on belowground biogeochemistry in a wet lowland tropical forest
Tropical rain forests are known for their tremendous biological diversity, but the effects of plant diversity on important ecosystem processes remain unclear. Interspecies differences in both the demand for nutrients and in foliar nutrient concentrations could drive differences in litter chemistry …
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Coexistence and resource use in space and time in a West African tortoise beetle community
Tropical rain forests and coral reefs are usually regarded as the epitome of complexity and diversity. The mechanisms, however, that allow so many species to coexist continuously, still need to be unraveled. Earlier equilibrium models explain community organization with a strict niche separation …
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Mammalian Postcranial Evolution and Primate Extinction in the Middle Eocene of North America
… This decline has been linked to the recession of tropical rain forests out of northern latitudes at that time. Climatic change of this magnitude would presumably have an impact on the contemporary mammalian faunas, with reduction or extinction of forest groups like primates, but perhaps radiation …
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Experimental litterfall manipulation effects on soil bacterial community structure and soil carbon cycling in a wet tropical forest
… and fluxes remain largely unknown, especially in tropical forest ecosystems. To investigate how shifts in bacterial community composition resulting from differences in C availability affect organic matter decomposition and how soil C pools and fluxes respond to shifts in C inputs, I utilized an in …
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Experimental litterfall manipulation effects on soil bacterial community structure and soil carbon cycling in a wet tropical forest
… and fluxes remain largely unknown, especially in tropical forest ecosystems. To investigate how shifts in bacterial community composition resulting from differences in C availability affect organic matter decomposition and how soil C pools and fluxes respond to shifts in C inputs, I utilized an in …
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Multi-locus phylogenetic inference of the howler monkey (Alouatta) radiation in South America.
… Mexico to northern Argentina. They occur in tropical rain forests, flooded and gallery forests, and deciduous and semi-deciduous environments. Despite their importance as seed dispersers, howlers have also been known to be ecological indicators. Available phylogenetic hypotheses for this …
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The implementation of the socio-economic rights provisions of the African Charter on Human and Peoples’ Rights at the national level : a case study of Democratic Republic of Congo (DRC)
… phosphate, and bauxite); iron ore; and precious tropical rain forests. This situation is due to certain reasons, including: bad governance; mismanagement of public finances by political authorities at the expense of the majority; lack or weakness of the institutions or organs of implementation; …
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Development of image analysis techniques to enable low-cost tropical rain forest monitoring
Tropical rain forests are important carbon stores and harbours of biodiversity but are being cleared at an unprecedented rate. There is an estimated 2 billion hectares of degraded forest globally, which retains a large proportion of its biodiversity. Restoration of these lands is needed to meet …
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Konflikte zwischen Ökologie und Ökonomie sowie mögliche Lösungsansätze am Beispiel der Provinz Hainan, Südchina
Die Arbeit beschäftigt sich in erster Linie mit den Konflikten zwischen dem Tropenwaldschutz und der Wirtschaftsentwicklung in der Provinz Hainan, Südchina. Das Hauptziel der Arbeit ist, Lösungsansätze herauszufinden, um eine nachhaltige Entwicklung in der genannten Provinz zu ermöglichen.
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Leaf and canopy responses to forest degradation and extreme climatic events: a remote sensing perspective
… using hyperspectroscopy and on the structure of forests modified by oil palm plantations using airborne LiDAR. The first chapter explores the potential and limitations of using hyperspectral data to estimate leaf traits remotely. Working with six temperate tree species in contrasting soil types, …
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MODELLING THE GROWTH OF THE LOGGED OVER INLAND PRODUCTION FORESTS OF PENINSULAR MALAYSIA WITH FOREST MANAGEMENT CONSIDERATION
… are (1) to develop growth models for inland tropical rain forests and (2) to propose changes to the current management systems and cutting regime options. In the Malaysia context inland forests encompass lowland, coastal hill, hill and upper hill forests, 'flic current management systems …
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Safer without Sex?
… in a range of forest habitats including subtropical hardwood forests as well as tropical rain forests. In addition to queens, gamergates and thelytokous workers co-occur in the same species. This remarkable complexity of reproductive strategies makes P. punctata unique within ants and …
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Effects of fragmentation and invasion on ant communities
… characteristics are especially problematic in tropical ecosystems where nutrient-poor soils do not easily meet the agricultural demands of growing human populations. A consequence of replacing tropical forests with agriculture is the creation of landscapes consisting of fragments of natural …