Across a migratory divide: divergent migration directions and non-breeding grounds of Eurasian reed warblers revealed by geolocators and stable isotopes

2018 ◽  
Vol 49 (6) ◽  
pp. jav-012516 ◽  
Author(s):  
Petr Procházka ◽  
Vojtěch Brlík ◽  
Elizabeth Yohannes ◽  
Bert Meister ◽  
Jürgen Auerswald ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Breeding Grounds ◽  
Migratory Divide

Assigning birds to wintering and breeding grounds using stable isotopes: lessons from two feather generations among three intercontinental migrants

2006 ◽  
Vol 147 (2) ◽  
pp. 395-404 ◽  
Author(s):  
Deborah A. Rocque ◽  
Merav Ben-David ◽  
Ronald P. Barry ◽  
Kevin Winker
Keyword(s):  
Stable Isotopes ◽  
Breeding Grounds

scholarly journals Stable isotope (C, N, O, and H) study of a comprehensive set of feathers from two Setophaga citrina

2020 ◽  
Author(s):  
Samiksha Deme ◽  
Laurence Y. Yeung ◽  
Tao Sun ◽  
Cin-Ty A. Lee
Keyword(s):  
Stable Isotopes ◽  
Stable Isotope ◽  
Isotopic Composition ◽  
Neotropical Migrants ◽  
Nitrogen Stable Isotopes ◽  
Carbon And Nitrogen ◽  
Breeding Grounds ◽  
Hooded Warblers

AbstractOxygen, hydrogen, carbon and nitrogen stable isotopes were measured on a comprehensive sampling of feathers from two spring Hooded Warblers (Setophaga citrina) in Texas to evaluate isotopic variability between feathers and during molt. Isotopic homogeneity within each bird was found across all four isotopic systems, supporting the hypothesis that molt in these neotropical migrants is fully completed on the breeding grounds. Moreover, this homogeneity suggests that the isotopic composition of a single feather is typically representative of the whole songbird. However, each bird also has outlier feathers, which could signify regrowth of lost feathers after prebasic molt.

scholarly journals Stable isotope (C, N, O, and H) study of a comprehensive set of feathers from two Setophaga citrina

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0236536
Author(s):  
Samiksha Deme ◽  
Laurence Y. Yeung ◽  
Tao Sun ◽  
Cin-Ty A. Lee
Keyword(s):  
Stable Isotopes ◽  
Stable Isotope ◽  
Isotopic Composition ◽  
Neotropical Migrants ◽  
Nitrogen Stable Isotopes ◽  
Carbon And Nitrogen ◽  
Breeding Grounds ◽  
Hooded Warblers

Oxygen, hydrogen, carbon and nitrogen stable isotopes were measured on a comprehensive sampling of feathers from two spring Hooded Warblers (Setophaga citrina) in Texas to evaluate isotopic variability between feathers and during molt. Isotopic homogeneity within each bird was found across all four isotopic systems, supporting the hypothesis that molt in these neotropical migrants is fully completed on the breeding grounds. This homogeneity suggests that the isotopic composition of a single feather is may be representative of the whole songbird. However, each bird was found to have one or two outlier feathers, which could signify regrowth of lost feathers after prebasic molt.

scholarly journals Low Frequency of “Double Molt” of Remiges in Ruddy Ducks Revealed by Stable Isotopes: Implications for Tracking Migratory Waterfowl

The Auk ◽  
2000 ◽  
Vol 117 (1) ◽  
pp. 129-135 ◽  
Author(s):  
Keith A. Hobson ◽  
Robert B. Brua ◽  
William L. Hohman ◽  
Len I. Wassenaar
Keyword(s):  
Stable Isotopes ◽  
Natural Populations ◽  
Low Frequency ◽  
Population Level ◽  
Wintering Grounds ◽  
Breeding Sites ◽  
Isotopic Analyses ◽  
Breeding Grounds ◽  
In The Wild ◽  
Ruddy Ducks

Abstract Ratios of the stable carbon (δ13C) and hydrogen (δD) isotopes in newly grown remiges of Ruddy Ducks (Oxyura jamaicensis) are influenced by the isotopic character of food types and ambient water. Systematic isotopic foodweb and water differences between coastal wintering grounds and prairie breeding grounds of Ruddy Ducks provide the basis for using isotopic analyses of feathers to trace the location and timing of molt. Anecdotal evidence, based largely on captive birds, suggests that Ruddy Ducks replace their remiges twice each year (once each on the breeding and wintering grounds), but a recent literature analysis indicates that this phenomenon is rare. Thus, we investigated the extent to which a biannual molt of the remiges occurs in the wild and at the population level. We analyzed the stable isotopes of carbon (n = 57 birds) and hydrogen (n = 50 birds) in flight feathers to estimate the prevalence of the so-called “double molt” of remiges in free-living Ruddy Ducks. Our data showed that natural populations of Ruddy Ducks express an overwhelming unimodal distribution of isotope ratios in their remiges, suggesting that they undergo a single molt at or near the breeding grounds. Only 3 to 6 of 50 birds from Manitoba showed isotopic evidence consistent with growing remiges on the wintering grounds. Feathers from Ruddy Ducks harvested during the fall in the Mississippi Flyway had isotopic profiles consistent with growth on northern freshwater breeding sites. Thus, our results confirm that the replacement of remiges twice each year by Ruddy Ducks is rare, and they suggest that this dual stable-isotope technique can be used to infer general molting origins of North American waterfowl.

Disentangling the role of shared ancestry and the environment on leaf stable isotopes

2019 ◽  
Author(s):  
Marko J. Spasojevic ◽  
Sören Weber1
Keyword(s):  
Stable Isotopes ◽  
Environmental Conditions ◽  
Evolutionary History ◽  
Environmental Control ◽  
Phylogenetic Signal ◽  
Individual Species ◽  
Habitat Types ◽  
Δ13c And Δ15n ◽  
Environmental Controls ◽  
Shared Ancestry

Stable carbon (C) and nitrogen (N) isotopes in plants are important indicators of plant water use efficiency and N acquisition strategies. While often regarded as being under environmental control, there is growing evidence that evolutionary history may also shape variation in stable isotope ratios (δ13C and δ15N) among plant species. Here we examined patterns of foliar δ13C and δ15N in alpine tundra for 59 species in 20 plant families. To assess the importance of environmental controls and evolutionary history, we examined if average δ13C and δ15N predictably differed among habitat types, if individual species exhibited intraspecific trait variation (ITV) in δ13C and δ15N, and if there were a significant phylogenetic signal in δ13C and δ15N. We found that variation among habitat types in both δ13C and δ15N mirrored well-known patterns of water and nitrogen limitation. Conversely, we also found that 40% of species exhibited no ITV in δ13C and 35% of species exhibited no ITV in δ15N, suggesting that some species are under stronger evolutionary control. However, we only found a modest signal of phylogenetic conservatism in δ13C and no phylogenetic signal in δ15N suggesting that shared ancestry is a weaker driver of tundra wide variation in stable isotopes. Together, our results suggest that both evolutionary history and local environmental conditions play a role in determining variation in δ13C and δ15N and that considering both factors can help with interpreting isotope patterns in nature and with predicting which species may be able to respond to rapidly changing environmental conditions.

LBA-ECO CD-02 CARBON, NITROGEN, OXYGEN STABLE ISOTOPES IN ORGANIC MATERIAL, BRAZIL

2010 ◽  
Author(s):  
J. BERRY, ◽  
C. COOK, ◽  
T.F. DOMINGUES, ◽  
J. EHLERINGER, ◽  
L. FLANAGAN, ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Organic Material ◽  
Oxygen Stable Isotopes
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