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 19 of 19 for “"Tropical Tree"”.
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The effects of local-scale resource heterogeneity on tropical tree communities
… especially in species rich communities such as tropical forests, as niche processes may play an important part in biodiversity maintenance. An important part of the environmental niche for tropical tree species is their specialization for particular soil resource conditions. My dissertation …
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The effect of soil nutrient availability on resource allocation in tropical tree species
Tropical tree communities are diverse in both their taxonomic composition and in their functional strategies for resource use and acquisition. Soil resources influence productivity of tropical forests and the distributions of tree species across edaphically heterogeneous landscapes. My dissertation …
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Stratospheric ozone depletion and plant-insect interactions: Effects of UVB radiation of generalist and specialist herbivores on a tropical tree and a temperate forb
I investigated effects of UVB radiation on plant-insect interactions using two plant-herbivore systems.
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The Effects of Dispersal on Macroecological Patterns
… ecological systems: birds on islands and trees in tropical rainforests. These independent estimates of dispersal then allow me to determine if macroecological patterns in these two systems can be attributed to dispersal dynamics.</p><p>In chapter two, I explore the contrasting …
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Phylogenetic Analyses of Andean and Amazonian Tree Communities in Ecuador
… Andean montane forests are richly populated with tropical tree species that have been little studied in a community phylogenetic context. The implementation of elevational transects and trait based analyses having proven useful in gaining a better understanding of how environmental factors are …
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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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Evaluation of Random Amplified Polymorphic DNA and Simple Sequence Repeat markers in Moringa oleifera (Lam.) to establish population diversity
… is potentially an economically important tree species. It has gained interest globally for its multipurpose uses, in particular as a source of nutrition and oil, as well as for its various medicinal properties. Moringa is native to India, Malaysia and the Middle East, but have been …
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The Role That Asexual Reproduction Plays in the Regeneration of Tropical Piper Shrubs: Habitat Differences and Genetic Consequences
… but little explored characteristic of many tropical plants with a variety of life-histories and habitat requirements. My dissertation research examined the ecological correlates and population genetic consequences of asexual reproductive success in five co-occurring Piper species using a …
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A Global GIS Analysis of Primate Diversity and Biogeography: Assessing Trends in Habitat Loss and Extinction Risk to Inform Primate Conservation
… concentrated in the tropics, and tropical rainforests in particular. Tropical tree cover loss is therefore central to the biodiversity crisis, and unfortunately it is continuing at alarming rates and showing no signs of slowing. This forest loss severely impacts primates, which are …
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Fruit to Sapling: an Ontogenetically Integrated Study of Tree Recruitment in an Amazonian Rainforest
<p>I examined recruitment patterns of multiple tree species in a western Amazonian floodplain forest at three ontogenetic stages: seed fall, seedling establishment, and sapling recruitment.</p><p>From analyzing a long-term seed rain dataset collected using a high-density array of seed traps, I …
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Development of efficient experimental strategies for the cryopreservation of problematic tropical rain forest tree germplasm
The rapid loss of the world’s tropical rainforest has serious consequences for mankind and global biodiversity. The conservation and sustainable management of tropical rainforests is helped greatly by the longterm storage and predictable availability of germplasm. Cryopreservation is one of the …
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Leaf Volatile Emissions Structure Tree Community Assembly and Mediate Climate Feedbacks in Tropical Forests
The biochemistry of leaves merges the fates of trees and the atmosphere. Leaf primary metabolism cycles carbon and indirectly drives atmospheric circulation via the latent heat of transpiration. Tropical forests contain half of global forest carbon, and actively cycle carbon and energy year round, …
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Tracking climate signals in tropical trees
The tropical warm pool waters surrounding Indonesia are one of the equatorial heat and moisture sources that are considered as a driving force of the global climate system. The climate in Indonesia is dominated by the equatorial monsoon system, and has been linked to El Niño-Southern Oscillation …
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Evaluating dry woodlands degradation and on-farm tee management in kenyan drylands
Tropical dry forests and woodlands are comprised of trees that are specially adapted to the harsh climatic and edaphic conditions, providing important ecosystem services for communities in an environment where other types of tropical tree species would not survive. Due to cyclic droughts which …
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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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Spatial distribution of canopy gaps in a tropical forest landscape and its influence on the tree community
Tropical forests are highly dynamic and diverse ecosystems, but our understanding of the processes that shape the local abundance and spatial distribution of the tree species within them is still rather limited. In particular, the role of disturbance in determining compositional variation in …
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Wachstumsraten, Wachstumsmuster und Wachstumsstörungen tropischer Bäume: Analyse von Langzeiteffekten und kurzfristigen Störungen mit Hilfe von Jahrringstudien
… are key data on understanding some aspects of tropical forest dynamics and ecology. In species that produce annual tree rings, tree-ring analysis allows the most precise estimate of these two parameters. The present study assessed the age and radial growth rate of three Hymenaea species …