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 103 for “"tropical forest"”.
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ASSESSING AND IMPROVING BIODIVERSITY OUTCOMES FOR TROPICAL FOREST RESTORATION
… as a key strategy to stem biodiversity declines. Tropical forests, which both house 80% of global biodiversity and account for 90% of deforestation from 2000-2018, are a particular focus of international initiatives like the Bonn Challenge and the UN Decade on Ecosystem Restoration (2021-2030). …
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Measuring tropical forest disturbance and regrowth with spaceborne lidar
The world’s tropical forests are vulnerable, facing threats of deforestation and anthropogenic disturbances, but they are also the site of enormous potential for forest growth. While these changes in tropical forest frontiers are widely agreed to have major implications for global carbon fluxes and …
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Understanding tropical forest dynamics through remote sensing and deep learning
Protection of tropical forests is key to achieving global climate and biodiversity conservation goals. They play an essential role in carbon sequestration, water cycling, and nutrient exchanges, thereby regulating atmospheric composition and global climate patterns. However, they are under …
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The influence of epiphytes on arthropods in the tropical forest canopy
… maintenance of the extraordinary biodiversity in tropical forests is a major challenge for modern biology. In this context, epiphytes are presumed to play an important role. To investigate the biological reality of this persistent yet insufficiently investigated notion, I conducted the present …
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The effects of tropical forest management on biodiversity and ecosystem functioning
The Effects of Tropical Forest Management on Biodiversity and Ecosystem Functioning Eleanor M. Slade 1. Between 35 % and 50 % of all closed-canopy tropical forest has been lost, and the rate of deforestation continues to increase throughout the tropics. Despite a wealth of literature on the effects …
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Effects of nutrient limitation on understory communities in a tropical forest
… diversity and abundance peak in mid-elevation tropical forests. Soil nutrient limitation is an important factor influencing plant communities and yet little is known about the factors influencing fern floristic composition and functional traits in montane tropical forests. My dissertation …
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The Impact of Global Climate Change on Tropical Forest Biodiversity in Amazonia
… of detailed knowledge about the distribution of tropical biodiversity, and from the smaller degree of warming expected at low latitudes. However, various General Circulation Models (GCMs) simulate regional drying and increasing seasonality for parts of the tropics, including Amazonia. This may …
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Wood and soil-atmosphere carbon dioxide fluxes from a tropical forest ecosystem
<p>Carbon cycling in tropical rainforests is an important component of the global carbon budget. A better understanding of controlling mechanisms and magnitude of CO2 sources from tropical forests will improve our ability to predict future impacts of climate changes. The research presented in this …
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Interactions among tree species and pathogen-suppressive bacteria in tropical forest soils
In tropical forests, soil-borne plant pathogens are thought to regulate diversity by driving negative plant-soil feedbacks and promoting density-dependent mortality of seedlings close to parent trees. Pathogens interact with a myriad of other organisms in soil that have the potential to moderate …
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Invertebrate mediated biodiversity-ecosystem functioning relationships : lessons from tropical forest dung beetles
Biological communities are changing across the globe as a result of anthropogenic pressures; abundances of individuals are declining within populations and species are becoming extinct. Biological diversity and trophic complexity in grasslands and soil food webs are positively associated with the …
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Community Structure, Nesting Success, and Isolation Effects in a Tropical Forest Bird Community
Rates of tropic deforestation have escalated in recent decades. Although the influence of deforestation on temperate communities has been studied in detail, few studies have been conducted in the tropics. Basic information describing local levels of species richness, population densities, and …
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Land use, food production, and the future of tropical forest species in Ghana
Agriculture is arguably the greatest threat to tropical forest species. Conservation scientists disagree over the relative importance of two opposing strategies for minimising this threat: enhancing on-farm biodiversity, through wildlife-friendly farming practices, or sparing land for nature by …
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Tropical forest structure: Ground measurements of coarse necromass and satellite observations of crown geometry
<p>Forests are structurally diverse, but these structures derive from the same processes of disturbance and growth. Understanding forest structure can help unlock the history, function, and future of a forested ecosystem. Components of forest structure include tree size distributions, foliage …
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Rainfall redistribution and change of water quality in tropical forest canopies : patterns and persistence
… During the passage of rain water through a forest canopy two main processes take place. First, water is redistributed; and second, its chemical properties change substantially. The rain water redistribution and the brief contact with plant surfaces results in a large variability of both …
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Occurrence, Composition, and Habitat Associations of Terrestrial Herbaceous Plants in a Tropical Forest Community
In tropical forests, niche differentiation in terms of resource partitioning remains a central hypothesis for the maintenance of species diversity. However, all plants require seemingly identical resources, which would appear to limit the number of niche dimensions available for species to inhabit. …
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Tree functional diversity affects litter decomposition and arthropod community composition in a tropical forest
The crucial role of tropical forests in the global carbon balance is determined by tree growth and the rapid turnover of organic material. Land-use change and forest recovery from disturbance alters species- and functional diversity, which in turn can modify decomposition processes and affect …
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The climatic significance of tropical forest edges and their representation in global climate models
… whether land covers created in the clearance of tropical humid forests influence water exchange between remnant forest patches and the atmosphere, and, if so, how this affects regional and global water exchange. Fieldwork presented in this thesis ascertains whether the amount of water transferred …
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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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