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Full-Text Articles in Marine Biology
Distribution And Diversity Of Bacterial Chemolithotrophs In Marine And Freshwater Sediments, Lisa M. Nigro
Distribution And Diversity Of Bacterial Chemolithotrophs In Marine And Freshwater Sediments, Lisa M. Nigro
Electronic Theses and Dissertations
Bacterial chemolithotroph population structure has been investigated in Lowes Cove marine intertidal mudflat and Damariscotta Lake, Maine. A 492 to 495 fragment of the cbbL gene, coding for the large subunit of Form I ribulose-1,5- bisphosphate carboxylase/oxygenase (rubisco) was amplified from lake surface (upper 2 mm) sediments and mudflat surface (upper 2 mm), subsurface (5-7 cm), and Mya arenaria burrow wall sediments, as well as sulfide-oxidizing bacterial mat samples. Amplified DNA was used to construct cbbL clone libraries. Phylogenetic analysis showed that Damariscotta Lake cbbL clones were mainly of the 1C type, indicating a facultative carbon monoxide/hydrogen-oxidizing community. Conversely, clones …
Molecular Population Genetics Of The Atlantic Sand Fiddler Crab, Uca Pugilator, Along The Atlantic Coast, David A. Weese
Molecular Population Genetics Of The Atlantic Sand Fiddler Crab, Uca Pugilator, Along The Atlantic Coast, David A. Weese
Electronic Theses and Dissertations
Author's abstract: The Atlantic sand fiddler crab, Uca pugilator, is an extremely abundant fiddler crab found along the eastern and Gulf coast of the United States. Fiddler crabs have a life cycle with an obligatory planktonic larval phase of 30-90 days, which might be expected to lead to widespread larval dispersal and consequent genetic homogeneity over considerable distances. However a large amount of morphological and behavioral variation is found between northern and southern populations along the eastern coast. This study was undertaken to determine the population genetic structure of U. pugilator and to determine whether these differences may have a …