Stable isotope (O and C) and pollen trends in eastern Lake Erie, evidence for a locally-induced climatic reversal of Younger Dryas age in the Great Lakes basin

1992 ◽  
Vol 6 (3-4) ◽  
pp. 241-250 ◽  
Author(s):  
C F M Lewis ◽  
T W Anderson
Keyword(s):  
Stable Isotope ◽  
Great Lakes ◽  
Lake Erie ◽  
Younger Dryas ◽  
Great Lakes Basin

scholarly journals Visualizing The Big Three: Geospatial Interpolation Of Heavy Metal Sediment Contamination In Lake Erie

2021 ◽  
Author(s):  
Danielle E. Mitchell
Keyword(s):  
Heavy Metal ◽  
Great Lakes ◽  
Pollution Control ◽  
Lake Erie ◽  
Scientific Evidence ◽  
Three Dimensional ◽  
Sediment Contamination ◽  
Great Lakes Basin ◽  
Lake Ecosystems ◽  
Essential Heavy Metal

A wealth of resources for economic prosperity have driven development along the shorelines of the Great Lakes for over 150 years. The rapid growth of industrial, agricultural, and residential land use has degraded many natural components of lake ecosystems, including sediments and water quality. In this dissertation, spatiotemporal patterns of non-essential heavy metal sediment contamination in Lake Erie will be examined from historic and contemporary sediment surveys. Three inter-related studies explore innovative methods for improving the validity and overall usefulness of sediment contamination maps that could be used by a variety of stakeholders in pollution control efforts throughout the Lake Erie basin. First, sediment survey designs are analyzed for their utility in creating valid interpolated surfaces from which spatiotemporal comparisons of mercury sediment contamination can be compared over time. The next study explores how ancillary sediment variables and contamination categorization methods can support interpolated maps of cadmium sediment contamination from low-density sediment surveys. The final study introduces a novel method of three-dimensional geovisualization to enhance the geographic representation of lead sediment contamination patterns throughout the Lake Erie basin. Innovative research methodologies designed for this dissertation may be applied to sediment contamination studies in other Great Lakes. The visualization techniques employed in mapping sediment contamination patterns provide strong scientific evidence for spatiotemporal change in non-essential heavy metal pollution throughout Lake Erie. Combined, the research findings and maps produced throughout this dissertation can contribute to the growing body of knowledge used in environmental decision making for pollution control in the Great Lakes basin

scholarly journals Visualizing The Big Three: Geospatial Interpolation Of Heavy Metal Sediment Contamination In Lake Erie

2021 ◽  
Author(s):  
Danielle E. Mitchell
Keyword(s):  
Heavy Metal ◽  
Great Lakes ◽  
Pollution Control ◽  
Lake Erie ◽  
Scientific Evidence ◽  
Three Dimensional ◽  
Sediment Contamination ◽  
Great Lakes Basin ◽  
Lake Ecosystems ◽  
Essential Heavy Metal

A wealth of resources for economic prosperity have driven development along the shorelines of the Great Lakes for over 150 years. The rapid growth of industrial, agricultural, and residential land use has degraded many natural components of lake ecosystems, including sediments and water quality. In this dissertation, spatiotemporal patterns of non-essential heavy metal sediment contamination in Lake Erie will be examined from historic and contemporary sediment surveys. Three inter-related studies explore innovative methods for improving the validity and overall usefulness of sediment contamination maps that could be used by a variety of stakeholders in pollution control efforts throughout the Lake Erie basin. First, sediment survey designs are analyzed for their utility in creating valid interpolated surfaces from which spatiotemporal comparisons of mercury sediment contamination can be compared over time. The next study explores how ancillary sediment variables and contamination categorization methods can support interpolated maps of cadmium sediment contamination from low-density sediment surveys. The final study introduces a novel method of three-dimensional geovisualization to enhance the geographic representation of lead sediment contamination patterns throughout the Lake Erie basin. Innovative research methodologies designed for this dissertation may be applied to sediment contamination studies in other Great Lakes. The visualization techniques employed in mapping sediment contamination patterns provide strong scientific evidence for spatiotemporal change in non-essential heavy metal pollution throughout Lake Erie. Combined, the research findings and maps produced throughout this dissertation can contribute to the growing body of knowledge used in environmental decision making for pollution control in the Great Lakes basin

scholarly journals Subspecific identification of the Great Lakes' first Brown Booby (Sula leucogaster) using DNA

2015 ◽  
Vol 129 (1) ◽  
pp. 53
Author(s):  
Jeffrey H. Skevington ◽  
James Pawlicki ◽  
Scott Kelso ◽  
Kevin C.R. Kerr ◽  
Marcie Jacklin
Keyword(s):  
Mitochondrial Dna ◽  
Great Lakes ◽  
Control Region ◽  
Adult Female ◽  
Genomic Dna ◽  
Lake Erie ◽  
Great Lakes Basin ◽  
Niagara River ◽  
Sula Leucogaster ◽  
First Time

The first Brown Booby (Sula leucogaster) recorded in the Great Lakes basin was discovered on Lake Erie near the source of the Niagara River on 7 October 2013 by J. P. Morphologic evidence suggested that this bird was an adult female of the nominate Atlantic subspecies. We obtained genomic DNA from feces left by the bird. Mitochondrial DNA from the control region (CR2) was sequenced and compared with extensive CR2 data for Brown Booby available in GenBank; this corroborated the morphologic hypothesis. This is the first time that a vagrant bird in Canada has been identified using DNA extracted from feces.

Detection of Asian carp DNA as part of a Great Lakes basin-wide surveillance program

2013 ◽  
Vol 70 (4) ◽  
pp. 522-526 ◽  
Author(s):  
Christopher L. Jerde ◽  
W. Lindsay Chadderton ◽  
Andrew R. Mahon ◽  
Mark A. Renshaw ◽  
Joel Corush ◽  
...  
Keyword(s):  
Great Lakes ◽  
Lake Erie ◽  
Lake Michigan ◽  
Environmental Dna ◽  
Asian Carp ◽  
Federal State ◽  
Surveillance Program ◽  
Hypophthalmichthys Molitrix ◽  
Great Lakes Basin ◽  
Western Basin

Environmental DNA (eDNA) is a sensitive technique for early detection of rare species, including bighead (Hypophthalmichthys nobilis) and silver (Hypophthalmichthys molitrix) carp, which are incipient invaders of the Great Lakes. Since 2009, 2822 samples have been collected from the Great Lakes basin to delimit the extent of Asian carp incursions. Samples collected in the Chicago Area Waterway System and in the western basin of Lake Erie indicate the presence of Asian carp DNA in the Great Lakes. These positive eDNA detections are within 6 and 4 km from where bighead carps were recovered in Lake Calumet, near Lake Michigan (2010), and from Sandusky Bay, Lake Erie (2000), respectively. To implement a Great Lakes surveillance plan for protecting imperiled species and reducing damages from invasive species, federal, state, and provincial agencies will need to cooperatively plan and implement a surveillance program that employs the unique strengths of multiple sampling tools, including eDNA methods.

Spatial and temporal differences in the diet of Great Lakes herring gulls (Larus argentatus): evidence from stable isotope analysis

1999 ◽  
Vol 56 (2) ◽  
pp. 323-338 ◽  
Author(s):  
Craig E Hebert ◽  
J Laird Shutt ◽  
Keith A Hobson ◽  
DV Chip Weseloh
Keyword(s):  
Stable Isotope ◽  
Great Lakes ◽  
Lake Erie ◽  
Trophic Position ◽  
Isotope Analysis ◽  
Laurentian Great Lakes ◽  
Larus Argentatus ◽  
Herring Gull ◽  
Herring Gulls ◽  
Egg Formation

Stable nitrogen (δ15N) and carbon (δ13C) isotope values were measured in lipid-free homogenates of herring gull (Larus argentatus) eggs collected from the Laurentian Great Lakes during 1974-1995. δ15N values provided an indication of adult gull trophic position during egg formation. After adjustment of egg δ15N values for interlake differences in baseline food web δ15N signatures, significant differences in gull trophic position were found among colonies. These results were attributed to differing proportions of fish in the diets of gulls from the various colonies. Aquatic foods available to gulls had greater δ15N values than terrestrial foods. δ13C measurements provided some support for our hypothesis that terrestrial foods, particularly garbage, were more enriched in 13C than aquatic foods. As the proportion of fish in the diet decreased, the fraction consisting of terrestrial food increased, resulting in an increase in δ13C values and a decline in δ15N values. Stable isotope values for gull eggs from Lake Erie changed significantly during the study period and may have reflected a decline in fish availability.

Reduced chlorophyll to phosphorus ratios in nearshore Great Lakes waters coincide with the establishment of dreissenid mussels

1999 ◽  
Vol 56 (1) ◽  
pp. 153-161 ◽  
Author(s):  
K H Nicholls ◽  
G J Hopkins ◽  
S J Standke
Keyword(s):  
Great Lakes ◽  
Lake Erie ◽  
Lake Ontario ◽  
Growth Potential ◽  
Great Lakes Basin ◽  
Detroit River ◽  
Quagga Mussels ◽  
Western Lake ◽  
Time Period ◽  
Highly Correlated

The establishment of zebra and quagga mussels (Dreissena spp.) in the Great Lakes has coincided with dramatic decreases in chlorophyll a to total phosphorus (Chl/TP) ratios in nearshore waters of Lake Erie, western Lake Ontario, and the Detroit River, but not in Lake Superior, southern Lake Huron, central and eastern Lake Ontario, or the upper St. Lawrence River. May-October average Chl/TP ratios in samples collected weekly (1976-1995) from five Lake Erie municipal water supply intakes were two to six times higher during the pre-Dreissena time period than during the post-Dreissena period. The pre-Dreissena logarithmically transformed Chl and TP data (May-October averages at all Great Lakes sampling locations) were highly correlated, with 75% of the log-transformed Chl variance explained by log-transformed TP. The post-Dreissena regression of May-October average Chl on TP was statistically significant, but only 14% of the variance in the Chl data could be explained by TP. We suggest that this has important implications for Great Lakes basin P management because changes in lake water TP resulting from further changes in TP loading will (post-Dreissena) have far less impact on Great Lakes phytoplankton growth potential than during pre-Dreissena times.

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