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Population Genetic And Hybridization Studies Of Three Bornean Bird Species: Mountain Black-Eye (Chlorocharis Emiliae), White-Rumped Shama (Copsychus Malabaricus), And Oriental Magpie-Robin (Copsychus Saularis), Dency Flenny Anak Augustine Gawin Gawin
Population Genetic And Hybridization Studies Of Three Bornean Bird Species: Mountain Black-Eye (Chlorocharis Emiliae), White-Rumped Shama (Copsychus Malabaricus), And Oriental Magpie-Robin (Copsychus Saularis), Dency Flenny Anak Augustine Gawin Gawin
LSU Doctoral Dissertations
Mountain Black-eye (Chlorocharis emiliae), Oriental Magpie-Robin (Copsychus saularis) and White-rumped Shama (C. malabaricus) are Bornean passerines with different population dynamics. To determine the effect of these differences on their population structures, I examined mitochondrial DNA sequences and morphological characters of populations within each species in Sarawak and Sabah, Malaysia. Chlorocharis is a white-eye (Zosteropidae), endemic to Borneo, with a unique “sky island” distribution. Molecular and previously obtained morphological data support its traditional division into at least three subspecies. An unexpected result of my comparisons was a marked genetic subdivision between its Sabah and Sarawak populations. C. malabaricus and C. saularis …
Biogeographical Approaches For Studying Species Invasion, Ganesh Prasad Bhattarai
Biogeographical Approaches For Studying Species Invasion, Ganesh Prasad Bhattarai
LSU Doctoral Dissertations
Many of the most notorious biological invasions occur at continent-wide or global scales but studies investigating mechanisms enhancing species invasions are often conducted at small spatial scales. Moreover, the contribution of mechanisms facilitating invasion might also vary across a geographical space. I used biogeographical approaches to explore the mechanisms enhancing invasion of introduced genotypes of Phragmites australis along the coastal wetlands of North America. I tested the hypotheses that large-scale disturbance events, such as hurricanes and tropical storms, enhance the invasion success of introduced P. australis in North America. The growth rate of P. australis patches was strongly and positively …