ingest
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modifyDatastreamByValue
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cdrApp
2019-03-21T14:16:07.907Z
Justin
Ridge
Author
Department of Marine Sciences
College of Arts and Sciences
INFLUENCE OF SEA LEVEL ON THE GROWTH AND COMPOSITION OF INTERTIDAL OYSTER REEFS
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
Spring 2017
2017
Ecology
Marine geology
carbon, ecogeomorphology, growth, oyster reefs, salt marsh, sea level
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Marine Sciences
Antonio
Rodriguez
Thesis advisor
Fredrick
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
Justin
Ridge
Author
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster reefs
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
Spring 2017
2017
Ecology
Marine geology
carbon, ecogeomorphology, growth, oyster reefs, salt marsh, sea level
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Marine Sciences
Antonio
Rodriguez
Thesis advisor
Fredrick
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
Justin
Ridge
Creator
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster
reefs
Oyster reefs play an important role in the estuarine landscape but have been
globally decimated over the past century from overharvesting, deteriorating water quality,
and disease. Expanding our knowledge of how these habitats are responding to anthropogenic
and climate driven changes will help improve management strategies. This work explored the
growth and composition of intertidal oyster reefs in the euhaline estuaries of North
Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of
reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats)
to elucidate that oyster reef growth is strongly linked to specific elevation ranges
within the intertidal zone. Building upon these findings, the second chapter determined
this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh
with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The
third chapter observed reefs of varying age, both constructed and natural, over five years
to discover that oyster reefs are in a dynamic equilibrium with sea level, responding
rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs
across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs
(150 years old) and recently constructed reefs (5-10 years old), chapter four provided
evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which
was first described for coral reefs. Within this context, reefs experience exceptional
rates of shell production and organic carbon accumulation while catching up to sea level,
but these values are at least a magnitude less in reefs that are keeping up with sea
level. Burial of ancient reefs is likely a result of estuarine changes related to the
migration of adjacent barrier islands, indicating oyster reefs existing near the limits of
suitable conditions could be fatally impaired by estuarine modifications, either
anthropogenic (inlet and river dynamics) or climate driven (storms).
Spring 2017
2017
Ecology
Marine geology
carbon, ecogeomorphology, growth, oyster reefs, salt
marsh, sea level
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting
institution
Marine Sciences
Antonio
Rodriguez
Thesis advisor
Fredrick
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
Justin
Ridge
Creator
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster reefs
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
Spring 2017
2017
Ecology
Marine geology
carbon, ecogeomorphology, growth, oyster reefs, salt marsh, sea level
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Marine Sciences
Antonio
Rodriguez
Thesis advisor
Fredrick
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
Justin
Ridge
Creator
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster reefs
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
2017-05
2017
Ecology
Marine geology
carbon, ecogeomorphology, growth, oyster reefs, salt marsh, sea level
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Marine Sciences
Antonio
Rodriguez
Thesis advisor
Fredrick
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
Justin
Ridge
Creator
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster reefs
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
2017
Ecology
Marine geology
carbon, ecogeomorphology, growth, oyster reefs, salt marsh, sea level
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Marine Sciences
Antonio
Rodriguez
Thesis advisor
Fredrick
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
2017-05
Justin
Ridge
Creator
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster reefs
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
2017
Ecology
Marine geology
carbon, ecogeomorphology, growth, oyster reefs, salt marsh, sea level
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Marine Sciences
Antonio
Rodriguez
Thesis advisor
Fredrick
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
2017-05
Justin
Ridge
Creator
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster reefs
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
2017
Ecology
Marine geology
carbon, ecogeomorphology, growth, oyster reefs, salt marsh, sea level
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Marine Sciences
Antonio
Rodriguez
Thesis advisor
Fredrick
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
2017-05
Justin
Ridge
Creator
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster reefs
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
2017
Ecology
Marine geology
carbon, ecogeomorphology, growth, oyster reefs, salt marsh, sea level
eng
Doctor of Philosophy
Dissertation
Marine Sciences
Antonio
Rodriguez
Thesis advisor
F. Joel
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
2017-05
University of North Carolina at Chapel Hill
Degree granting institution
Justin
Ridge
Creator
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster reefs
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
2017
Ecology
Marine geology
carbon; ecogeomorphology; growth; oyster reefs; salt marsh; sea level
eng
Doctor of Philosophy
Dissertation
Marine Sciences
Antonio
Rodriguez
Thesis advisor
F. Joel
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
2017-05
University of North Carolina at Chapel Hill
Degree granting institution
Justin
Ridge
Creator
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster reefs
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
2017
Ecology
Marine geology
carbon, ecogeomorphology, growth, oyster reefs, salt marsh, sea level
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Marine Sciences
Antonio
Rodriguez
Thesis advisor
F. Joel
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
2017-05
Justin
Ridge
Creator
Department of Marine Sciences
College of Arts and Sciences
Influence of sea level on the growth and composition of intertidal oyster reefs
Oyster reefs play an important role in the estuarine landscape but have been globally decimated over the past century from overharvesting, deteriorating water quality, and disease. Expanding our knowledge of how these habitats are responding to anthropogenic and climate driven changes will help improve management strategies. This work explored the growth and composition of intertidal oyster reefs in the euhaline estuaries of North Carolina using high-resolution mapping (terrestrial lidar), density sampling, and cores of reefs. The first chapter examined mature, constructed patch reefs (isolated on sandflats) to elucidate that oyster reef growth is strongly linked to specific elevation ranges within the intertidal zone. Building upon these findings, the second chapter determined this pattern holds true on marsh-fringing reefs, and as the reefs transgress the marsh with sea-level rise (SLR) they also protect carbonaceous marsh sediment from erosion. The third chapter observed reefs of varying age, both constructed and natural, over five years to discover that oyster reefs are in a dynamic equilibrium with sea level, responding rapidly (< 1 year) to fluctuations in sea level. Similarly, examining oyster reefs across time scales, from ancient reefs (~4,000-2,000 years old) to extant natural reefs (150 years old) and recently constructed reefs (5-10 years old), chapter four provided evidence that oyster reefs exhibit catch-up and keep-up growth phases tied to SLR, which was first described for coral reefs. Within this context, reefs experience exceptional rates of shell production and organic carbon accumulation while catching up to sea level, but these values are at least a magnitude less in reefs that are keeping up with sea level. Burial of ancient reefs is likely a result of estuarine changes related to the migration of adjacent barrier islands, indicating oyster reefs existing near the limits of suitable conditions could be fatally impaired by estuarine modifications, either anthropogenic (inlet and river dynamics) or climate driven (storms).
2017
Ecology
Marine geology
carbon; ecogeomorphology; growth; oyster reefs; salt marsh; sea level
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Antonio
Rodriguez
Thesis advisor
F. Joel
Fodrie
Thesis advisor
Michael
Piehler
Thesis advisor
Brent
McKee
Thesis advisor
Jonathan
Grabowski
Thesis advisor
text
2017-05
Ridge_unc_0153D_16926.pdf
uuid:2da11335-7360-41bf-9172-2034e8334778
2019-07-06T00:00:00
2017-04-18T17:12:50Z
proquest
application/pdf
4893294
yes