Stable isotope patterns of benthic organisms from the Great Lakes region indicate variable dietary overlap of Diporeia spp. and dreissenid mussels

2014 ◽  
Vol 71 (12) ◽  
pp. 1784-1795 ◽  
Author(s):  
Carolyn J. Foley ◽  
Gabriel J. Bowen ◽  
Thomas F. Nalepa ◽  
Marisol S. Sepúlveda ◽  
Tomas O. Höök
Keyword(s):  
New York ◽  
Stable Isotope ◽  
Great Lakes ◽  
Resource Use ◽  
Lake Michigan ◽  
Dreissenid Mussels ◽  
Cayuga Lake ◽  
Dramatic Decline ◽  
Before And After ◽  
Terrestrial Inputs

Competition between native and invasive species may bring about a suite of ecological and evolutionary outcomes, including local extirpations. In the Laurentian Great Lakes, competition for food may explain the dramatic decline of Diporeia spp. amphipods following the introduction of dreissenid mussels. This hypothesis has not been confirmed, in part because dreissenids and Diporeia appear to co-exist and flourish in other systems, including the Finger Lakes of New York. We used carbon, nitrogen, hydrogen, and oxygen stable isotope ratios to examine resource use by Diporeia from three spatially distinct populations (Lake Michigan, Lake Superior, and Cayuga Lake), dreissenids from areas where they co-occur with Diporeia (Lake Michigan and Cayuga Lake), and Diporeia from Lake Michigan collected before and after dreissenid invasion (1986–2009). Our results suggest that dreissenids may affect resource use by Diporeia in areas of co-occurrence, but the extent to which those effects are positive or negative is unclear. Terrestrial inputs may provide an important subsidy for Diporeia populations in small systems but may not be substantial enough in the Great Lakes to ensure that both taxa thrive.

PCB Uptake by Five Species of Fish in Lake Michigan, Green Bay of Lake Michigan, and Cayuga Lake, New York

1982 ◽  
Vol 39 (5) ◽  
pp. 700-709 ◽  
Author(s):  
A. L. Jensen ◽  
S. A. Spigarelli ◽  
M. M. Thommes
Keyword(s):  
New York ◽  
Brown Trout ◽  
Lake Michigan ◽  
Lake Trout ◽  
Coho Salmon ◽  
Metabolic Parameters ◽  
Lake Whitefish ◽  
Bioenergetic Model ◽  
Green Bay ◽  
Cayuga Lake

We applied a bioenergetic model to describe uptake of polychlorinated biphenyls (PCBs) by lake trout (Salvelinus namaycush), brown trout (Salmo trutta), lake whitefish (Coregonus clupeaformis), coho salmon (Oncorhynchus kisutch), and chinook salmon (Oncorhynchus tshawytscha) in Lake Michigan; lake trout and lake whitefish in Green Bay of Lake Michigan; and lake trout in Cayuga Lake, New York. The model describes PCB uptake in terms of metabolism, food consumption, size, and growth. Concentrations of PCBs differ significantly among species; for the same species there are large differences among habitats. The pattern of PCB uptake by brown trout is different from that of the other species. Application of the model with uptake and metabolic parameters estimated by Norstrom et al. describes the trend in the brown trout data; to describe uptake for other species we increased the exponent of weight for metabolism γ. An increase in γ changes the shape of the relation between PCB concentration and body weight from asymptotic to non-asymptotic. In all species tested except brown trout, uptake of PCBs was not asymptotic and concentrations did not approach an equilibrium; accumulation of contaminants was first rapid, decreased toward a plateau, and then began a second rapid increase. Simulation studies indicate that differences in PCB concentrations among species and in the same species among different environments result from differences in metabolic parameters, exposure, size, and rate of growth.Key words: PCBs, bioenergetic model, contaminant uptake, toxicology, fish, Great Lakes, salmon, trout, whitefish

Allozyme Variation of Great Lakes Alewife, Alosa pseudoharengus: Genetic Differentiation and Affinities of a Recent Invader

1992 ◽  
Vol 49 (9) ◽  
pp. 1770-1777 ◽  
Author(s):  
Peter E. Ihssen ◽  
G. William Martin ◽  
David W. Rodgers
Keyword(s):  
New York ◽  
Great Lakes ◽  
Allozyme Variation ◽  
Allelic Frequency ◽  
Starch Gel Electrophoresis ◽  
Alosa Pseudoharengus ◽  
Allelic Frequencies ◽  
Cayuga Lake ◽  
Finger Lakes ◽  
Allozyme Loci

Allelic frequencies for six polymorphic allozyme loci (27 loci examined), as determined by starch-gel electrophoresis, were not significantly different for alewife, Alosa pseudoharengus, among the Great Lakes (Ontario, Erie, Huron, and Michigan). Alewife from one of the Finger Lakes (Cayuga Lake) had allelic frequencies similar to Great Lakes alewife, and the alleles of Great Lakes alewife form a subset of those found in Cayuga Lake. In contrast, Maritime Canada populations (Gaspereau, Miramichi, and St. John rivers) were distinct from each other and from the Great Lakes and Cayuga Lake populations. Highly significant allelic frequency differences were observed among the Maritime populations and between the Maritime populations and the Great Lakes or Cayuga Lake populations. Fifteen alleles were not shared between the Great Lakes and the Maritime populations. We concluded from these results that Great Lakes alewife and Cayuga Lake alewife form a contiguous stock and that Great Lakes alewife are a recent invader that probably originated from the Hudson–Mohawk rivers via the Erie Canal and the New York Finger Lakes rather than the previously suggested alternative origin from the Canadian Maritimes via the St. Lawrence River.

EARLIEST MICROBOTANICAL EVIDENCE FOR MAIZE IN THE NORTHERN LAKE MICHIGAN BASIN

2018 ◽  
Vol 83 (2) ◽  
pp. 345-355 ◽  
Author(s):  
Rebecca K. Albert ◽  
Susan M. Kooiman ◽  
Caitlin A. Clark ◽  
William A. Lovis
Keyword(s):  
New York ◽  
Great Lakes ◽  
Lake Michigan ◽  
Second Century ◽  
Michigan Basin ◽  
Maize Starch ◽  
Ceramic Vessels ◽  
Western Great Lakes ◽  
Food Residues ◽  
Multiple Samples

There is no recorded maize (Zea maysspp.mays) from sites predating circa cal AD 800 in the northern Lake Michigan or Lake Superior basins of the western Great Lakes, despite the presence of maize microbotanicals including phytoliths and starches in Michigan, New York, and Quebec as early as 400 cal BC. To evaluate the potential for an earlier maize presence in the northern Lake Michigan basin, samples of carbonized food residues adhering to 16 ceramic vessels were obtained from the Winter site (20DE17) located on the Garden Peninsula in the northern Lake Michigan basin. Each sample was split and sent to two analysts. Both analysts identified low incidences of maize starch and phytoliths in multiple samples, with overlapping identifications on several. Three direct accelerator mass spectrometry dates on the carbonized residues reveal maize incorporated into the residues as early as the second century cal BC, 800 years before any regional macrobotanical evidence. Although the method of dispersal cannot be determined, these results support the proposition that initial northern dispersal of maize in the region may have been nearly 800 years earlier than macrobotanical evidence would suggest and is consistent with the timing of its introduction to the lower Great Lakes area.

scholarly journals Interactive, Hands-On Training for Hospital Workers Increases Level of Special Pathogen Preparedness

Sci ◽  
2021 ◽  
Vol 3 (2) ◽  
pp. 29
Author(s):  
Syra Madad ◽  
Eleanor Tolf
Keyword(s):  
New York ◽  
New York City ◽  
Mixed Method ◽  
Hospital Workers ◽  
Department Of Health ◽  
Interactive Training ◽  
Hands On ◽  
Before And After ◽  
Question Survey

The purpose of this evaluation was to determine the effect of intensive, interactive training on hospital workers’ preparedness for special pathogen cases by utilizing the Frontline Facility Special Pathogens Training Course created by the Systemwide Special Pathogens Program at New York City Health + Hospitals (NYC H+H). An 8 h course was offered in 2018 and 2019 to healthcare employees throughout the Department of Health and Human Services Region 2, mostly from NYC H+H. Evaluation included multiple-choice pre and post exams, a 26-question survey about level of preparedness before and after the training, and follow-up interviews focused on changes in facility protocols. As a result, 61% of survey respondents indicated that they had never previously attended a hospital-sponsored special pathogen training. After the training, there was a 53.3% report rate of feeling “very prepared,” compared to 14.6% before the training. Additionally, there was an 11% improvement in test scores. Furthermore, 77% of respondents reported that their facility had changed protocols relating to topics of the course after their training date. Survey participants reported general satisfaction with the course, as well as an increased level of preparedness for special pathogen cases. Together, the results of the exams, survey, and interviews suggest that this interactive, mixed-method training increases special pathogen preparedness across different healthcare sectors. With the ongoing threat of special pathogens, the need for continued training and maintaining a state of readiness is paramount in healthcare.

scholarly journals Establishment of Regional Phytoremediation Buffer Systems for Ecological Restoration in the Great Lakes Basin, USA. I. Genotype × Environment Interactions

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 430 ◽  
Author(s):  
Ronald S. Zalesny ◽  
Andrej Pilipović ◽  
Elizabeth R. Rogers ◽  
Joel G. Burken ◽  
Richard A. Hallett ◽  
...  
Keyword(s):  
Great Lakes ◽  
Best Management Practices ◽  
Management Practices ◽  
Recurrent Selection ◽  
Lake Michigan ◽  
Great Lakes Basin ◽  
Annual Increment ◽  
Climate Conditions ◽  
The North ◽  
Local Soil

Poplar remediation systems are ideal for reducing runoff, cleaning groundwater, and delivering ecosystem services to the North American Great Lakes and globally. We used phyto-recurrent selection (PRS) to establish sixteen phytoremediation buffer systems (phyto buffers) (buffer groups: 2017 × 6; 2018 × 5; 2019 × 5) throughout the Lake Superior and Lake Michigan watersheds comprised of twelve PRS-selected clones each year. We tested for differences in genotypes, environments, and their interactions for health, height, diameter, and volume from ages one to four years. All trees had optimal health. Mean first-, second-, and third-year volume ranged from 71 ± 26 to 132 ± 39 cm3; 1440 ± 575 to 5765 ± 1132 cm3; and 8826 ± 2646 to 10,530 ± 2110 cm3, respectively. Fourth-year mean annual increment of 2017 buffer group trees ranged from 1.1 ± 0.7 to 7.8 ± 0.5 Mg ha−1 yr−1. We identified generalist varieties with superior establishment across a broad range of buffers (‘DM114’, ‘NC14106’, ‘99038022’, ‘99059016’) and specialist clones uniquely adapted to local soil and climate conditions (‘7300502’, ‘DN5’, ‘DN34’, ‘DN177’, ‘NM2’, ‘NM5’, ‘NM6’). Using generalists and specialists enhances the potential for phytoremediation best management practices that are geographically robust, being regionally designed yet globally relevant.

scholarly journals Declining bacteria, lead, and sulphate, and rising pH and oxygen in the lower Mississippi River

AMBIO ◽  
2021 ◽  
Author(s):  
R. Eugene Turner
Keyword(s):  
Water Quality ◽  
Mississippi River ◽  
Pollution Abatement ◽  
National Policy ◽  
Quality Improvements ◽  
Sulfur Dioxide Emissions ◽  
Dramatic Decline ◽  
Before And After ◽  
Lower Mississippi River ◽  
The 1960S

AbstractVarious air and water pollution issues in the US were confronted in the last 60 years using national policy legislation, notably the Clean Water Act and the Clean Air Act. I examine changes in the concentrations of bacteria, oxygen, lead, and sulphate at the terminus of the Mississippi River before and after these pollution abatement efforts. Microbial concentrations increased or were stable from 1909 to 1980 but decreased about 3 orders of magnitude after the 1970s, while the average oxygen content increased. A large decline in lead concentration occurred after the 1960s, along with a less dramatic decline in sulphate concentrations. The pH of the river dropped to a low of 5.8 in 1965 as sulfur dioxide emissions peaked and averaged 8.2 in 2019 after emissions declined. Decades of efforts at a national scale created water quality improvements and are an example for addressing new and existing water quality challenges.

scholarly journals Biomonitoring of populations in Western New York at risk for exposure to Great Lakes contaminants

2019 ◽  
Vol 179 ◽  
pp. 108690 ◽  
Author(s):  
Sanghamitra S. Savadatti ◽  
Ming Liu ◽  
Cihan Caglayan ◽  
Julie Reuther ◽  
Elizabeth L. Lewis-Michl ◽  
...  
Keyword(s):  
At Risk ◽  
New York ◽  
Great Lakes
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