Using Stable-Isotope Analysis to Identify Endogenous and Exogenous Sources of Nutrients in Eggs of Migratory Birds: Applications to Great Lakes Contaminants Research

The Auk ◽  
1997 ◽  
Vol 114 (3) ◽  
pp. 467-478 ◽  
Author(s):  
Keith A. Hobson ◽  
Peter J. Ewins
Keyword(s):  
Stable Isotope ◽  
Great Lakes ◽  
Stable Isotope Analysis ◽  
Migratory Birds ◽  
Isotope Analysis

Environmental change and seasonal behavior of mastodons in the Great Lakes region inferred from stable isotope analysis

2014 ◽  
Vol 82 (2) ◽  
pp. 366-377 ◽  
Author(s):  
Jessica Z. Metcalfe ◽  
Fred J. Longstaffe
Keyword(s):  
Stable Isotope ◽  
Great Lakes ◽  
Stable Isotope Analysis ◽  
Seasonal Variations ◽  
Sampling Methods ◽  
Tooth Enamel ◽  
Isotope Analysis ◽  
Seasonal Behavior ◽  
Isotopic Analyses ◽  
Mammut Americanum

AbstractWe investigate seasonal variations in the diet and drinking water of four Great Lakes mastodon (Mammut americanum) specimens using stable isotope analysis of serially sampled inner-enamel bioapatite structural carbonate (δ13Csc, δ18Osc), and previously published bulk analyses. Isotopic analyses and thin section measurements showed that mastodon tooth enamel extension rates (~ 12–4 mm/yr, decreasing toward the cervix) were lower than those of mammoths or modern elephants. Mastodons had distinct and highly regular seasonal variations in δ13Csc and δ18Osc, which we interpret in the context of local glacial history and vegetation changes. Seasonal variations in δ18O were large but variations in δ13C were small, and may have been obscured if coarser sampling methods than our inner-enamel sampling approach were used. Thus, our approach may be particularly useful for understanding relatively small seasonal changes in δ13C within C3 environments. The seasonal patterns, though not entirely conclusive, suggest that the Ontario mastodons did not migrate over very long distances. Rather, the climate and seasonal dietary patterns of mastodons within the region changed over time, from ~ 12,400 to 10,400 14C yr BP (~ 15,000 – 12,000 cal yr BP). Insights gained using these methods can contribute to a better understanding of megafaunal extinctions and Paleoamerican lifeways.

Long-term food web change in Lake Superior

2009 ◽  
Vol 66 (12) ◽  
pp. 2118-2129 ◽  
Author(s):  
Stephanie N. Schmidt ◽  
M. Jake Vander Zanden ◽  
James F. Kitchell
Keyword(s):  
Stable Isotope ◽  
Great Lakes ◽  
Food Web ◽  
Stable Isotope Analysis ◽  
Native Species ◽  
Trophic Position ◽  
Lake Superior ◽  
Isotope Analysis ◽  
Food Web Structure

Restoration and rehabilitation of native species in the Laurentian Great Lakes is a priority for fisheries management agencies. Restoration efforts are increasingly incorporating a perspective that considers species within a broader food web context. We used stable isotope analysis and museum-preserved specimens to describe and quantify 100 years of food web changes in the Lake Superior fish community. We validated stable isotope analysis of museum specimens by showing a positive correlation between isotope- and diet-based estimates of trophic position. While introductions have created a more trophically diverse food web than historically found in Lake Superior, two separate metrics revealed little community-wide change in the food web. Our species-specific analysis revealed trophic niche differences between shortjaw ( Coregonus zenithicus ) and shortnose ( Coregonus reighardi ) ciscoes, two species previously argued to be indistinguishable based on morphological characteristics. By providing a historical context, our findings show the ability of the Lake Superior food web to accommodate non-native species introductions over the last century while still supporting native species populations. This long-term information about food web structure can help guide management and restoration goals in Lake Superior. Furthermore, Lake Superior can serve as a basis for comparing food web changes in other, more highly altered Great Lakes.

Development of an In-Situ Mass Spectrometer for Stable Isotope Analysis

2003 ◽  
Author(s):  
R. T. Short ◽  
Gottfried P. Kibelka ◽  
Robert H. Byrne ◽  
David Hollander
Keyword(s):  
Stable Isotope ◽  
Mass Spectrometer ◽  
Stable Isotope Analysis ◽  
Isotope Analysis

LATE HOLOCENE HYDROCLIMATE RECONSTRUCTION FROM LAKE CHICHOJ, GUATEMALA USING STABLE ISOTOPE ANALYSIS OF SEDIMENTS

2017 ◽  
Author(s):  
Peter Mortensen ◽  
◽  
Nathan D. Stansell ◽  
Byron A. Steinman ◽  
Gilles Y. Brocard ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Late Holocene ◽  
Isotope Analysis

Exploring the Potential of Electrospray-Orbitrap for Stable Isotope Analysis Using Nitrate as a Model

2021 ◽  
Author(s):  
Andreas Hilkert ◽  
John K. Böhlke ◽  
Stanley J. Mroczkowski ◽  
Kyle L. Fort ◽  
Konstantin Aizikov ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis
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