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Full-Text Articles in Life Sciences
Going All The Way: Phylogeography And Trans-Pacific Divergence Genetics Of Nucella Lima, Lisa Cox
Going All The Way: Phylogeography And Trans-Pacific Divergence Genetics Of Nucella Lima, Lisa Cox
All Theses
Fluctuating climate over the last 2 million years (MY) has repeatedly caused latitudinal shifts in species distributions, fueling the hypothesis that the glacial-interglacial dynamics of the Pleistocene could have driven regional genetic differentiation and potentially speciation. For species whose distributions spanned the entire North Pacific, regional extinction of northern populations during cooler glacial periods may have resulted in isolation and genetic differentiation of eastern and western populations. To test this hypothesis, I gathered genetic data from a rocky shore intertidal gastropod, Nucella lima, whose current (i.e. warm interglacial) distribution spans the entire North Pacific. Mitochondrial DNA sequences are genetically structured …
Biological Reserves Under Climate Change; A Case Study In Brazil's Atlantic Rainforest, Maria Amin
Biological Reserves Under Climate Change; A Case Study In Brazil's Atlantic Rainforest, Maria Amin
Dissertations and Theses
No abstract provided.
Causes And Consequences Of Changes In Algal Community Structure Of Arctic Tundra Ponds From Barrow, Alaska, Mariana Vargas Medrano
Causes And Consequences Of Changes In Algal Community Structure Of Arctic Tundra Ponds From Barrow, Alaska, Mariana Vargas Medrano
Open Access Theses & Dissertations
Algal communities in the Arctic are highly sensitive to environmental change, such as longer growing seasons and changes in ice cover. On the north slope of Alaska, ponds and lakes cover large portions of the total land area. We surveyed the periphytic algal communities in tundra ponds from Barrow, Alaska to assess environmental effects on their populations. Samples were collected in August 2008-10 from two main study areas: the IBP (the International Biological Program), which was also studied in 1970-71 but now is located near to human settlements, and the BEO (Barrow Environmental Observatory), which is within a protected area. …