ingest cdrApp 2018-06-13T17:45:43.686Z 51cd2fe2-3fd7-401f-a923-a97bc3db68a2 modifyDatastreamByValue RELS-EXT fedoraAdmin 2018-06-13T18:29:51.258Z Setting exclusive relation addDatastream MD_TECHNICAL fedoraAdmin 2018-06-13T18:30:02.576Z Adding technical metadata derived by FITS addDatastream MD_FULL_TEXT fedoraAdmin 2018-06-13T18:30:26.040Z Adding full text metadata extracted by Apache Tika modifyDatastreamByValue RELS-EXT fedoraAdmin 2018-06-13T18:30:48.215Z Setting exclusive relation modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-07-11T18:10:55.614Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-08-21T22:23:27.661Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-09-28T13:45:10.829Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-10-12T13:42:01.516Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-10-17T19:02:23.220Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2019-03-22T16:55:22.280Z John Paul Balmonte Author Department of Marine Sciences College of Arts and Sciences Microbial community composition, extracellular enzymatic activities, and structure-function relationships in the central Arctic Ocean, a high-latitude fjord, and the North Atlantic Ocean Due to their abundance, diversity, and capabilities to transform and metabolize diverse compounds, microbial communities regulate biogeochemical cycles on micro-, regional, and global scales. The activities of microbial communities affect the flow of matter, energy sources of other organisms, and human health, as well as other aspects of life. Yet, the composition, diversity, and ecological roles of microbes in parts of the global oceans—from the high latitudes to the deep water column—remain underexplored. Drawing from microbiological, oceanographic, and ecological concepts, this dissertation explores several fundamental topics: 1) the manner in which hydrographic conditions influence microbial community composition; 2) the ability of these microbial communities across environmental and depth gradients to hydrolyze organic compounds; and 3) microbial structure-function relationships in different habitats and under altered environmental conditions. In the central Arctic Ocean, the composition and enzymatic function of pelagic, particle associated, and benthic bacterial communities varied with depth and region, in parallel with specific hydrographic features. The microbial structure-function relationship in the pelagic realm indicated functional redundancy, suggesting that bacterial compositional shifts—in response to the changing Arctic—may have complex and less predictable functional consequences than previously anticipated. In Tyrolerfjord-Young Sound, northeast Greenland, microbial enzymatic activity patterns were investigated in rivers and within the fjord. Activity patterns correlated with the composition of bacterial communities and dissolved organic matter in the same waters, suggesting that factors extrinsic (organic matter supply) and intrinsic (composition) to microbial communities may, in concert, influence their heterotrophic activities. Finally, functional consequences of differences in community composition were further explored in the North Atlantic. Enriched with high molecular weight organic matter, compositionally-distinct microbial communities exhibited convergent and divergent successional patterns. While convergent features were driven by several initially rare taxa, overarching successional differences in microbial community composition and enzymatic profiles provide evidence for the functional significance of community structure. The integration of community compositional analyses and enzymatic activity measurements has provided valuable information on the identity, ecological roles, and environmental sensitivity of microbial communities in previously underexplored oceanic regions and depths. These insights can be used to evaluate the potential for environmental changes to alter marine microbial community structure and function. Spring 2018 2018 Biogeochemistry Microbiology Ecology Arctic Ocean, bacterial communities, enzymatic activities, Greenland, North Atlantic Ocean eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Marine Sciences Carol Arnosti Thesis advisor Andreas Teske Thesis advisor Ronnie Glud Thesis advisor Barbara MacGregor Thesis advisor John Bane Thesis advisor text John Paul Balmonte Author Department of Marine Sciences College of Arts and Sciences Microbial community composition, extracellular enzymatic activities, and structure-function relationships in the central Arctic Ocean, a high-latitude fjord, and the North Atlantic Ocean Due to their abundance, diversity, and capabilities to transform and metabolize diverse compounds, microbial communities regulate biogeochemical cycles on micro-, regional, and global scales. The activities of microbial communities affect the flow of matter, energy sources of other organisms, and human health, as well as other aspects of life. Yet, the composition, diversity, and ecological roles of microbes in parts of the global oceans—from the high latitudes to the deep water column—remain underexplored. Drawing from microbiological, oceanographic, and ecological concepts, this dissertation explores several fundamental topics: 1) the manner in which hydrographic conditions influence microbial community composition; 2) the ability of these microbial communities across environmental and depth gradients to hydrolyze organic compounds; and 3) microbial structure-function relationships in different habitats and under altered environmental conditions. In the central Arctic Ocean, the composition and enzymatic function of pelagic, particle associated, and benthic bacterial communities varied with depth and region, in parallel with specific hydrographic features. The microbial structure-function relationship in the pelagic realm indicated functional redundancy, suggesting that bacterial compositional shifts—in response to the changing Arctic—may have complex and less predictable functional consequences than previously anticipated. In Tyrolerfjord-Young Sound, northeast Greenland, microbial enzymatic activity patterns were investigated in rivers and within the fjord. Activity patterns correlated with the composition of bacterial communities and dissolved organic matter in the same waters, suggesting that factors extrinsic (organic matter supply) and intrinsic (composition) to microbial communities may, in concert, influence their heterotrophic activities. Finally, functional consequences of differences in community composition were further explored in the North Atlantic. Enriched with high molecular weight organic matter, compositionally-distinct microbial communities exhibited convergent and divergent successional patterns. While convergent features were driven by several initially rare taxa, overarching successional differences in microbial community composition and enzymatic profiles provide evidence for the functional significance of community structure. The integration of community compositional analyses and enzymatic activity measurements has provided valuable information on the identity, ecological roles, and environmental sensitivity of microbial communities in previously underexplored oceanic regions and depths. These insights can be used to evaluate the potential for environmental changes to alter marine microbial community structure and function. Spring 2018 2018 Biogeochemistry Microbiology Ecology Arctic Ocean, bacterial communities, enzymatic activities, Greenland, North Atlantic Ocean eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Marine Sciences Carol Arnosti Thesis advisor Andreas Teske Thesis advisor Ronnie Glud Thesis advisor Barbara MacGregor Thesis advisor John Bane Thesis advisor text John Paul Balmonte Author Department of Marine Sciences College of Arts and Sciences Microbial community composition, extracellular enzymatic activities, and structure-function relationships in the central Arctic Ocean, a high-latitude fjord, and the North Atlantic Ocean Due to their abundance, diversity, and capabilities to transform and metabolize diverse compounds, microbial communities regulate biogeochemical cycles on micro-, regional, and global scales. The activities of microbial communities affect the flow of matter, energy sources of other organisms, and human health, as well as other aspects of life. Yet, the composition, diversity, and ecological roles of microbes in parts of the global oceans—from the high latitudes to the deep water column—remain underexplored. Drawing from microbiological, oceanographic, and ecological concepts, this dissertation explores several fundamental topics: 1) the manner in which hydrographic conditions influence microbial community composition; 2) the ability of these microbial communities across environmental and depth gradients to hydrolyze organic compounds; and 3) microbial structure-function relationships in different habitats and under altered environmental conditions. In the central Arctic Ocean, the composition and enzymatic function of pelagic, particle associated, and benthic bacterial communities varied with depth and region, in parallel with specific hydrographic features. The microbial structure-function relationship in the pelagic realm indicated functional redundancy, suggesting that bacterial compositional shifts—in response to the changing Arctic—may have complex and less predictable functional consequences than previously anticipated. In Tyrolerfjord-Young Sound, northeast Greenland, microbial enzymatic activity patterns were investigated in rivers and within the fjord. Activity patterns correlated with the composition of bacterial communities and dissolved organic matter in the same waters, suggesting that factors extrinsic (organic matter supply) and intrinsic (composition) to microbial communities may, in concert, influence their heterotrophic activities. Finally, functional consequences of differences in community composition were further explored in the North Atlantic. Enriched with high molecular weight organic matter, compositionally-distinct microbial communities exhibited convergent and divergent successional patterns. While convergent features were driven by several initially rare taxa, overarching successional differences in microbial community composition and enzymatic profiles provide evidence for the functional significance of community structure. The integration of community compositional analyses and enzymatic activity measurements has provided valuable information on the identity, ecological roles, and environmental sensitivity of microbial communities in previously underexplored oceanic regions and depths. These insights can be used to evaluate the potential for environmental changes to alter marine microbial community structure and function. Spring 2018 2018 Biogeochemistry Microbiology Ecology Arctic Ocean, bacterial communities, enzymatic activities, Greenland, North Atlantic Ocean eng Doctor of Philosophy Dissertation Marine Sciences Carol Arnosti Thesis advisor Andreas Teske Thesis advisor Ronnie Glud Thesis advisor Barbara MacGregor Thesis advisor John Bane Thesis advisor text University of North Carolina at Chapel Hill Degree granting institution John Paul Balmonte Creator Department of Marine Sciences College of Arts and Sciences Microbial community composition, extracellular enzymatic activities, and structure-function relationships in the central Arctic Ocean, a high-latitude fjord, and the North Atlantic Ocean Due to their abundance, diversity, and capabilities to transform and metabolize diverse compounds, microbial communities regulate biogeochemical cycles on micro-, regional, and global scales. The activities of microbial communities affect the flow of matter, energy sources of other organisms, and human health, as well as other aspects of life. Yet, the composition, diversity, and ecological roles of microbes in parts of the global oceans—from the high latitudes to the deep water column—remain underexplored. Drawing from microbiological, oceanographic, and ecological concepts, this dissertation explores several fundamental topics: 1) the manner in which hydrographic conditions influence microbial community composition; 2) the ability of these microbial communities across environmental and depth gradients to hydrolyze organic compounds; and 3) microbial structure-function relationships in different habitats and under altered environmental conditions. In the central Arctic Ocean, the composition and enzymatic function of pelagic, particle associated, and benthic bacterial communities varied with depth and region, in parallel with specific hydrographic features. The microbial structure-function relationship in the pelagic realm indicated functional redundancy, suggesting that bacterial compositional shifts—in response to the changing Arctic—may have complex and less predictable functional consequences than previously anticipated. In Tyrolerfjord-Young Sound, northeast Greenland, microbial enzymatic activity patterns were investigated in rivers and within the fjord. Activity patterns correlated with the composition of bacterial communities and dissolved organic matter in the same waters, suggesting that factors extrinsic (organic matter supply) and intrinsic (composition) to microbial communities may, in concert, influence their heterotrophic activities. Finally, functional consequences of differences in community composition were further explored in the North Atlantic. Enriched with high molecular weight organic matter, compositionally-distinct microbial communities exhibited convergent and divergent successional patterns. While convergent features were driven by several initially rare taxa, overarching successional differences in microbial community composition and enzymatic profiles provide evidence for the functional significance of community structure. The integration of community compositional analyses and enzymatic activity measurements has provided valuable information on the identity, ecological roles, and environmental sensitivity of microbial communities in previously underexplored oceanic regions and depths. These insights can be used to evaluate the potential for environmental changes to alter marine microbial community structure and function. Biogeochemistry Microbiology Ecology Arctic Ocean; bacterial communities; enzymatic activities; Greenland; North Atlantic Ocean eng Doctor of Philosophy Dissertation Marine Sciences Carol Arnosti Thesis advisor Andreas Teske Thesis advisor Ronnie Glud Thesis advisor Barbara MacGregor Thesis advisor John Bane Thesis advisor text University of North Carolina at Chapel Hill Degree granting institution 2018 2018-05 John Paul Balmonte Author Department of Marine Sciences College of Arts and Sciences Microbial community composition, extracellular enzymatic activities, and structure-function relationships in the central Arctic Ocean, a high-latitude fjord, and the North Atlantic Ocean Due to their abundance, diversity, and capabilities to transform and metabolize diverse compounds, microbial communities regulate biogeochemical cycles on micro-, regional, and global scales. The activities of microbial communities affect the flow of matter, energy sources of other organisms, and human health, as well as other aspects of life. Yet, the composition, diversity, and ecological roles of microbes in parts of the global oceans—from the high latitudes to the deep water column—remain underexplored. Drawing from microbiological, oceanographic, and ecological concepts, this dissertation explores several fundamental topics: 1) the manner in which hydrographic conditions influence microbial community composition; 2) the ability of these microbial communities across environmental and depth gradients to hydrolyze organic compounds; and 3) microbial structure-function relationships in different habitats and under altered environmental conditions. In the central Arctic Ocean, the composition and enzymatic function of pelagic, particle associated, and benthic bacterial communities varied with depth and region, in parallel with specific hydrographic features. The microbial structure-function relationship in the pelagic realm indicated functional redundancy, suggesting that bacterial compositional shifts—in response to the changing Arctic—may have complex and less predictable functional consequences than previously anticipated. In Tyrolerfjord-Young Sound, northeast Greenland, microbial enzymatic activity patterns were investigated in rivers and within the fjord. Activity patterns correlated with the composition of bacterial communities and dissolved organic matter in the same waters, suggesting that factors extrinsic (organic matter supply) and intrinsic (composition) to microbial communities may, in concert, influence their heterotrophic activities. Finally, functional consequences of differences in community composition were further explored in the North Atlantic. Enriched with high molecular weight organic matter, compositionally-distinct microbial communities exhibited convergent and divergent successional patterns. While convergent features were driven by several initially rare taxa, overarching successional differences in microbial community composition and enzymatic profiles provide evidence for the functional significance of community structure. The integration of community compositional analyses and enzymatic activity measurements has provided valuable information on the identity, ecological roles, and environmental sensitivity of microbial communities in previously underexplored oceanic regions and depths. These insights can be used to evaluate the potential for environmental changes to alter marine microbial community structure and function. Spring 2018 2018 Biogeochemistry Microbiology Ecology Arctic Ocean, bacterial communities, enzymatic activities, Greenland, North Atlantic Ocean eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Marine Sciences Carol Arnosti Thesis advisor Andreas Teske Thesis advisor Ronnie Glud Thesis advisor Barbara MacGregor Thesis advisor John Bane Thesis advisor text John Paul Balmonte Author Department of Marine Sciences College of Arts and Sciences Microbial community composition, extracellular enzymatic activities, and structure-function relationships in the central Arctic Ocean, a high-latitude fjord, and the North Atlantic Ocean Due to their abundance, diversity, and capabilities to transform and metabolize diverse compounds, microbial communities regulate biogeochemical cycles on micro-, regional, and global scales. The activities of microbial communities affect the flow of matter, energy sources of other organisms, and human health, as well as other aspects of life. Yet, the composition, diversity, and ecological roles of microbes in parts of the global oceans—from the high latitudes to the deep water column—remain underexplored. Drawing from microbiological, oceanographic, and ecological concepts, this dissertation explores several fundamental topics: 1) the manner in which hydrographic conditions influence microbial community composition; 2) the ability of these microbial communities across environmental and depth gradients to hydrolyze organic compounds; and 3) microbial structure-function relationships in different habitats and under altered environmental conditions. In the central Arctic Ocean, the composition and enzymatic function of pelagic, particle associated, and benthic bacterial communities varied with depth and region, in parallel with specific hydrographic features. The microbial structure-function relationship in the pelagic realm indicated functional redundancy, suggesting that bacterial compositional shifts—in response to the changing Arctic—may have complex and less predictable functional consequences than previously anticipated. In Tyrolerfjord-Young Sound, northeast Greenland, microbial enzymatic activity patterns were investigated in rivers and within the fjord. Activity patterns correlated with the composition of bacterial communities and dissolved organic matter in the same waters, suggesting that factors extrinsic (organic matter supply) and intrinsic (composition) to microbial communities may, in concert, influence their heterotrophic activities. Finally, functional consequences of differences in community composition were further explored in the North Atlantic. Enriched with high molecular weight organic matter, compositionally-distinct microbial communities exhibited convergent and divergent successional patterns. While convergent features were driven by several initially rare taxa, overarching successional differences in microbial community composition and enzymatic profiles provide evidence for the functional significance of community structure. The integration of community compositional analyses and enzymatic activity measurements has provided valuable information on the identity, ecological roles, and environmental sensitivity of microbial communities in previously underexplored oceanic regions and depths. These insights can be used to evaluate the potential for environmental changes to alter marine microbial community structure and function. Spring 2018 2018 Biogeochemistry Microbiology Ecology Arctic Ocean, bacterial communities, enzymatic activities, Greenland, North Atlantic Ocean eng Doctor of Philosophy Dissertation Marine Sciences Carol Arnosti Thesis advisor Andreas Teske Thesis advisor Ronnie Glud Thesis advisor Barbara MacGregor Thesis advisor John Bane Thesis advisor text University of North Carolina at Chapel Hill Degree granting institution John Paul Balmonte Creator Department of Marine Sciences College of Arts and Sciences Due to their abundance, diversity, and capabilities to transform and metabolize diverse compounds, microbial communities regulate biogeochemical cycles on micro-, regional, and global scales. The activities of microbial communities affect the flow of matter, energy sources of other organisms, and human health, as well as other aspects of life. Yet, the composition, diversity, and ecological roles of microbes in parts of the global oceans—from the high latitudes to the deep water column—remain underexplored. Drawing from microbiological, oceanographic, and ecological concepts, this dissertation explores several fundamental topics: 1) the manner in which hydrographic conditions influence microbial community composition; 2) the ability of these microbial communities across environmental and depth gradients to hydrolyze organic compounds; and 3) microbial structure-function relationships in different habitats and under altered environmental conditions. In the central Arctic Ocean, the composition and enzymatic function of pelagic, particle associated, and benthic bacterial communities varied with depth and region, in parallel with specific hydrographic features. The microbial structure-function relationship in the pelagic realm indicated functional redundancy, suggesting that bacterial compositional shifts—in response to the changing Arctic—may have complex and less predictable functional consequences than previously anticipated. In Tyrolerfjord-Young Sound, northeast Greenland, microbial enzymatic activity patterns were investigated in rivers and within the fjord. Activity patterns correlated with the composition of bacterial communities and dissolved organic matter in the same waters, suggesting that factors extrinsic (organic matter supply) and intrinsic (composition) to microbial communities may, in concert, influence their heterotrophic activities. Finally, functional consequences of differences in community composition were further explored in the North Atlantic. Enriched with high molecular weight organic matter, compositionally-distinct microbial communities exhibited convergent and divergent successional patterns. While convergent features were driven by several initially rare taxa, overarching successional differences in microbial community composition and enzymatic profiles provide evidence for the functional significance of community structure. The integration of community compositional analyses and enzymatic activity measurements has provided valuable information on the identity, ecological roles, and environmental sensitivity of microbial communities in previously underexplored oceanic regions and depths. These insights can be used to evaluate the potential for environmental changes to alter marine microbial community structure and function. 2018-05 2018 Biogeochemistry Microbiology Ecology Arctic Ocean; bacterial communities; enzymatic activities; Greenland; North Atlantic Ocean eng Doctor of Philosophy Dissertation Carol Arnosti Thesis advisor Andreas Teske Thesis advisor Ronnie Glud Thesis advisor Barbara MacGregor Thesis advisor John Bane Thesis advisor text University of North Carolina at Chapel Hill Degree granting institution Balmonte_unc_0153D_17734.pdf uuid:cdfa8e29-51c5-4c7c-b66d-9f30fd00cca8 2020-06-13T00:00:00 2018-04-19T21:26:38Z proquest application/pdf 7201606