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 12 of 12 for “"Barro Colorado Island"”.
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Differential avian extinction from Barro Colorado Island, Panama: Nest predation and population genetic factors
On Barro Colorado Island (BCI), a 1500 ha forest preserve in Gatun Lake (part of the Panama Canal) that has been isolated form mainland forest for 75 years, eight species of birds in the terrestrial insectivore guild have gone extinct, one is declining, and 3 persist. I evaluated two alternative …
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Diel patterns of insect herbivory and plant secondary metabolites in understory shrubs on Barro Colorado Island
… species in the genera Piper and Psychotria on Barro Colorado Island, Panama, to quantify the timing of herbivory over the course of 56 diel cycles. I found that on young leaves, protecting plants from herbivores during the night causes significantly fewer leaves to be damaged than if plants are …
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Plant Architecture, Photosynthetic Responses, and Population Biology in the Palms Socratea Durissima and Scheelea Zonensis on Barro Colorado Island, Panama (Physiological, Tropical)
… Socratea durissima and Scheelea zonensis on Barro Colorado Island, Panama. Canopy architecture and biomass allocation change as plants mature, and can affect light interception and carbon budgets. Thus plant growth forms are expected to affect the light requirements of plants, and are …
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Seed Banks, Seed Mortality, and the Role of Fungal Communities in Neotropical Forests
… seed bank; pioneer species; pathogens; ITS; Barro Colorado Island, Panama; La Selva, Costa Rica; Yasuni, Ecuador; recruitment limitation.
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Linking mechanism to pattern in community assembly: Ant-mediated seed dispersal in neotropical pioneer tree species
… that are commonly found in the soil seed bank of Barro Colorado Island (BCI), Panama. The seeds of these tree species do not provide an elaiosome food reward to their ant removers, but varied in mass, primary dispersal mode (animal or wind), dormancy type (physical, physiological, or quiescent), …
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Variability within the 10-year pollen rain of a seasonal neotropical forest
… ten years of seasonal aerial pollen samples from Barro Colorado Island (BCI), Panama. Using canonical correspondence analysis, we identified the environmental variables that most account for intra-annual and inter-annual variability in tropical pollen production and found that pollen rain samples …
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Predation on lizard eggs by ants: interaction modifications in an unstable physical environment
… of the tropical lizard, Anolis limifrons, on Barro Colorado Island, Panama, I hypothesized that annual variation in lizard population size is the result of modifications in the rate of predation on lizard eggs by Solenopsis ants induced by annual variation in wet season rainfall. I tested this …
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Estimation of population density and investigation of socio-spatial organization of ocelots (Leopardus pardalis) from comparison and integration of two noninvasive methods
… (chapter 2) in ocelots (Leopardus pardalis) on Barro Colorado Island, Panama. Ocelots are a medium-sized felid that ranges from northern Argentina to the southern United States. Although ocelots are currently listed as least concern throughout their range (IUCN 2013), some populations (e.g. …
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Community Structure, Nesting Success, and Isolation Effects in a Tropical Forest Bird Community
… ecologies. Third, I inventoried the avifauna of Barro Colorado Island (BCI), a 1600-ha hilltop isolated from the nearby mainland forest in 1914 during construction of the Panama Canal, to evaluate effects of isolation on bird community structure. Sixty-five species have disappeared from BCI in …
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The importance of cotyledon functional morphology and patterns of seed reserve utilization for the physiological ecology of neotropical tree seedlings
… species found in the tropical moist forest on Barro Colorado Island, Panama. Among epigeal phanerocotylar species, photosynthetic capacity per unit cotyledon mass is linearly related to the reciprocal of cotyledon thickness. The relative balance of the dual functions of cotyledons, export of …
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Climatic, environmental, and phenological analyses of diverse lowland neotropical pollen rain data using ecoinformatic and machine learning tools
… obtained from two lowland Panamanian forests: Barro Colorado Island (BCI) and Parque Nacional San Lorenzo (PNSL). Together, these records represent the three longest continuous collections of airborne pollen data analyzed from the Neotropics to date. This dissertation explores novel approaches …
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Spatial distribution of canopy gaps in a tropical forest landscape and its influence on the tree community
… of gap disturbance across a forest landscape at Barro Colorado Island (BCI), Panama, and its impact on species distribution. First, I addressed the spatial component of canopy gap disturbances, by exploring the patterns of canopy height across the forest landscape. I considered three main …