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 43 for “"Neotropics"”.
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The Convoluted Origin and Diversification of Strangler Figs in the Neotropics
… of species diversity of strangler figs in the Neotropics (Ficus sect. Americanae, ca. 120 species), and I make emphasis on the evolutionary role of hybridization. I base my investigation on field collections and molecular data (RADseq) of >400 samples (>80 species) from the entire range of the …
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Optimising the trade-offs between food production, biodiversity and ecosystem services in the Neotropics
Agriculture is the greatest threat to biodiversity across the world and a major contributor to anthropogenic greenhouse gas emissions. Both pressures will increase over coming decades as populations and per capita consumption rise. How we choose to produce food will, to a large extent, determine …
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Taxonomy, phylogeny and resource use of Glyptapanteles (Hymenoptera: Braconidae, Microgastrinae), genus highly diversified in the Neotropics
… that this genus is one of the largest in the Neotropics. Glyptapanteles are diminutive parasitoid wasps, which are free-living as adults, but as immatures, they attack exclusively larvae of Lepidoptera as a food resource for their developing larvae. These parasitoid wasps play a preponderant …
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Impacts of Habitat, Resource Addition, and Predator Exclusion on Rodent Community Structure and Hantaviruses in the Neotropics
Understanding how climate and human land use change impacts trophic interactions is essential in the face of ongoing biodiversity loss and the continued emergence of RNA viruses and zoonosis. Human land use changes such as agricultural expansion, deforestation, and habitat degradation all have been …
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Habitat selection and spatial personalities of Belizean white-tailed deer
… efforts are of critical importance in the Neotropics – one of the most threatened and biodiverse regions of the world – primarily due to habitat loss and other anthropogenic impacts. Deer (family Cervidae) in the Neotropics act as keystone species because of their importance as prey for …
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Elevational Gradients Shape Bee Network Structure and Community Composition Across Tropical Lowland to Montane Forests in Costa Rica
… stability. Drivers of network properties in the neotropics, especially low and mid-elevations, remain relatively unknown, and thus this area should receive special attention. Replicated empirical networks comparing properties along environmental gradients in these regions can help contribute to …
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Discovery of Novel Neurologically Active Phytochemicals in Neotropical Piperaceae: An Ethnopharmacological Approach
… folk illnesses such as susto and mal aire in the Neotropics and to investigate the anxiolytic and antiepileptic potential of previously unstudied Neotropical members of the genera Piper and Peperomia. Firstly, the literature was reviewed and a regression analysis method was used in order to …
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Spatial and non-spatial patterns of genetic diversity in Neotropical bats
… are scarce, even for singular species. In the Neotropics, the highest concentration of mammal and amphibian genetic diversity has been found in the Andes mountains and the Amazon Rainforest, yet it is an open question whether bat genetic diversity is also higher in these regions, or even if any …
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Climatic, environmental, and phenological analyses of diverse lowland neotropical pollen rain data using ecoinformatic and machine learning tools
Analyses of modern pollen rain data from the Neotropics have traditionally been used to help interpret compositional changes observed in sedimentary pollen data. Comparisons of modern pollen assemblage data produced by different forest environments are compared to compositional changes observed …
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Molecular Phylogenetics and Historical Biogeography of the Tribe Chiococceae (Rubiaceae)
… and seeds. They are primarily distributed in the Neotropics but also occur in the West Pacific islands; thus exhibiting amphi-Pacific tropical disjunction. This study addresses the phylogenetic relationships and biogeography of the Chiococceae using molecular DNA sequence data, and presents novel …
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Forecasted Afrotropical Forest Responses to Climate Change Diverge from Neotropical Predictions with Consequences for Biodiversity Conservation and Carbon Storage
… to occur with equivalent warming in the Neotropics.</p><p>This work reveals that community forecasts are not generalizable across regions, and more representative studies are needed in understudied biomes like the Afrotropics. Nascent data sets, increased availability of high quality …
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New delimitations and phylogenetic relationships of Sabiceeae (Ixoroideae, Rubiaceae) and revision of the Neotropical species of Sabicea Aubl.
… reached São Tomé & Principe, Madagascar, and the Neotropics independently via four dispersal events. This study also indicates that most probably the major diversification of Sabicea s.l. started in mainland Africa and the second major radiation occurred in the Neotropics. The presence of only one …
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Transcriptomic Insights into the Morphological Variation Present in Bromeliaceae
… radiation of Bromeliaceae throughout the Neotropics to three main features: absorptive trichomes, tank reservoirs, and CAM photosynthesis. Based on leaf morphology and arrangement, root type, and nutrient acquisition, Pittendrigh (1948) conservatively separated bromeliads into four main …
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The Role of Continuous Flowering Phenology for in Neotropical Plant-Pollinator Interactions for Use in Conservation
… diversity of mutualistic interactions in the Neotropics exceeds that of all other tropical regions and is posited to result from a unique assemblage of plant species that produce the highest spatio-temporal predictability of food resources. A rare component of the Neotropical flora that …
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Species Richness and Ecological Diversity of Myxomycetes and Myxomycete-Like Organisms in the Tropical Forests of Brazil
… and diversity of microorganism in the Neotropics, this dissertation includes (1) an overview of the biogeographical patterns of microorganisms; (2) a bibliographic revision of the myxomycetes species found in Brazil distributed among the different vegetation physiognomies throughout the …
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Evolutionary relationships in Afro-Malagasy Schefflera (Araliaceae) based on nuclear and plastid markers
… Africa and Madagascar, Melanesia, the Neotropics, and a small clade distributed throughout several islands in the insular Pacific Ocean. The Afro-Malagasy clade contains nearly 50 species distributed throughout tropical, sub-Saharan Africa, Madagascar, the Comoros, and the Seychelles …
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Revisão dos Lekiini (Diptera, Tachinidae) neotropicais
… the world, 18 of them occurring in the neotropics: Beskioleskia Townsend, Galapagosia Curran, Genea Rondani, Geneodes Townsend, leskia Robineau-Desvoidy, Metamyobia Townsend, Mintholeskia Townsend, Parthenoleskia Townsend, Proleskiomima Townsend, Spathipalpus Rondani, Stomatodexia Brauer …
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Structure-function relationships in the water-use strategies and ecological diversity of the Bromeliaceae
… ecologically diverse angiosperm families in the Neotropics. In recent years, this family has begun to emerge as a model system for the study of plant evolutionary ecology and physiology, and major advances have been made in understanding the factors involved in episodes of rapid diversification …
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Modeling Neotropical Ecosystems during the Last Glacial Maximum
… modeling study of vegetation cover in the Neotropics during the Last Glacial Maximum, focusing on the individual and interactive effects of fire and low carbon dioxide on biome distribution and tree cover. Inclusion of fire and the effects of low carbon dioxide improved agreement with …
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Palynological Evidence for the Paleoenvironmental History of the Miocene Llanos Basin, Eastern Colombia
… with Andean uplift and the evolution of the Neotropics.</p>
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