Gail L Chmura
Biographic Data
| ID | 5599034 |
|---|---|
| NAME | Gail L Chmura |
| GIVEN NAMES | Gail L |
| FAMILY NAME | Chmura |
| SIGNATURE | CHMURA G L |
| AFFILIATIONS | McGill University |
| ORCID | 0000-0001-7163-3903 |
| VERIFIED | Yes |
| TOTAL WORKS | 7 |
| TOTAL CITATIONS | 8 |
| WORKS AS AUTHOR | 7 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2010 |
| LATEST PUBLICATION YEAR | 2018 |
| H-INDEX | 1 |
Nitrous oxide emissions could reduce the blue carbon value of marshes on eutrophic estuaries
The supply of nitrogen to ecosystems has surpassed the Earth’s Planetary Boundary and its input to the marine environment has caused estuarine waters to become eutrophic. Excessive supply of nitrogen to salt marshes has been associated with shifts in species’ distribution and production, as well as marsh degradation and loss. Our study of salt marshes in agriculturally intensive watersheds shows that coastal eutrophication can have an additional …
Bringing climate scientist’s tools into classrooms to improve conceptual understandings
Potential Pitfalls of Pollen Dating
Pollen extracted from ocean and wetland sediments cored from the eastern Canadian Margin, James Bay region, and Atlantic provinces of Canada have been radiocarbon dated and results are reported here. Pollen dates from ocean sediments were compared with marine carbonate (mollusk shells or foraminifera) dates from the same core levels, dates for which validity was assessed via correlations with other cores, and for which reworking has been excluded…
A blueprint for blue carbon
Recent research has highlighted the valuable role that coastal and marine ecosystems play in sequestering carbon dioxide (CO 2 ). The carbon (C) sequestered in vegetated coastal ecosystems, specifically mangrove forests, seagrass beds, and salt marshes, has been termed “blue carbon”. Although their global area is one to two orders of magnitude smaller than that of terrestrial forests, the contribution of vegetated coastal habitats per unit area t…
The greenhouse gas flux and potential global warming feedbacks of a northern macrotidal and microtidal salt marsh
Conversion of wetlands by drainage for agriculture or other anthropogenic activities could have a negative or positive feedback to global warming (GWF). We suggest that a major predictor of the GWF is salinity of the wetland soil (a proxy for available sulfate), a factor often ignored in other studies. We assess the radiative balance of two northern salt marshes with average soil salinities > 20 ppt, but with high (macro-) and low (micro-) tidal …
A new Shoreline displacement model for the last 7 ka from eastern James Bay, Canada
The shoreline displacement history of the eastern James Bay lowlands in the last 7 ka has been investigated by means of AMS radiocarbon dating of sediments cored from wetlands. We present twelve radiocarbon dates on macrofossils from six sites spread along a gradient of increasing land age and elevation. Palynomorph analysis (pollen, spores, and dinoflagellate cysts) was used to define the isolation stratigraphy. During the last 7 ka the shorelin…
Reinterpretation of past sea-level variation of the Bay of Fundy
Reports of shifts in rates of aggradation in a salt marsh deposit at Amherst Point, Nova Scotia have been linked with fluctuations in eustatic sea level, crustal subsidence and, possibly, changes in tidal amplitude. However, evidence for the most recent fluctuation is an artifact of early Acadian land reclamation that occurred in the seventeenth century at Amherst Point. Acadian settlers had constructed dikes to prevent regular tidal flooding, bu…
Potential Pitfalls of Pollen Dating
Pollen extracted from ocean and wetland sediments cored from the eastern Canadian Margin, James Bay region, and Atlantic provinces of Canada have been radiocarbon dated and results are reported here. Pollen dates from ocean sediments were compared with marine carbonate (mollusk shells or foraminifera) dates from the same core levels, dates for which validity was assessed via correlations with other cores, and for which reworking has been excluded…
A new Shoreline displacement model for the last 7 ka from eastern James Bay, Canada
The shoreline displacement history of the eastern James Bay lowlands in the last 7 ka has been investigated by means of AMS radiocarbon dating of sediments cored from wetlands. We present twelve radiocarbon dates on macrofossils from six sites spread along a gradient of increasing land age and elevation. Palynomorph analysis (pollen, spores, and dinoflagellate cysts) was used to define the isolation stratigraphy. During the last 7 ka the shorelin…
Reinterpretation of past sea-level variation of the Bay of Fundy
Reports of shifts in rates of aggradation in a salt marsh deposit at Amherst Point, Nova Scotia have been linked with fluctuations in eustatic sea level, crustal subsidence and, possibly, changes in tidal amplitude. However, evidence for the most recent fluctuation is an artifact of early Acadian land reclamation that occurred in the seventeenth century at Amherst Point. Acadian settlers had constructed dikes to prevent regular tidal flooding, bu…
A blueprint for blue carbon
Recent research has highlighted the valuable role that coastal and marine ecosystems play in sequestering carbon dioxide (CO 2 ). The carbon (C) sequestered in vegetated coastal ecosystems, specifically mangrove forests, seagrass beds, and salt marshes, has been termed “blue carbon”. Although their global area is one to two orders of magnitude smaller than that of terrestrial forests, the contribution of vegetated coastal habitats per unit area t…
The greenhouse gas flux and potential global warming feedbacks of a northern macrotidal and microtidal salt marsh
Conversion of wetlands by drainage for agriculture or other anthropogenic activities could have a negative or positive feedback to global warming (GWF). We suggest that a major predictor of the GWF is salinity of the wetland soil (a proxy for available sulfate), a factor often ignored in other studies. We assess the radiative balance of two northern salt marshes with average soil salinities > 20 ppt, but with high (macro-) and low (micro-) tidal …
Potential Pitfalls of Pollen Dating
Pollen extracted from ocean and wetland sediments cored from the eastern Canadian Margin, James Bay region, and Atlantic provinces of Canada have been radiocarbon dated and results are reported here. Pollen dates from ocean sediments were compared with marine carbonate (mollusk shells or foraminifera) dates from the same core levels, dates for which validity was assessed via correlations with other cores, and for which reworking has been excluded…
Nitrous oxide emissions could reduce the blue carbon value of marshes on eutrophic estuaries
The supply of nitrogen to ecosystems has surpassed the Earth’s Planetary Boundary and its input to the marine environment has caused estuarine waters to become eutrophic. Excessive supply of nitrogen to salt marshes has been associated with shifts in species’ distribution and production, as well as marsh degradation and loss. Our study of salt marshes in agriculturally intensive watersheds shows that coastal eutrophication can have an additional …
Bringing climate scientist’s tools into classrooms to improve conceptual understandings
Ecology (5 works) · Wetland (5 works) · Coastal wetland ecosystem dynamics (4 works) · Geology and Paleoclimatology Research (4 works) · Marsh (4 works) · Salt marsh (4 works) · Bay (3 works) · Environmental Science (3 works) · Geology (3 works) · Isotope Analysis in Ecology (3 works)