Search Results - "Hobson, KA"

Temporal and intra-population patterns in polar bear foraging ecology in western Hudson Bay by Johnson, Amy C., Hobson, Keith A., Lunn, Nicholas J., McGeachy, David, Richardson, Evan S., Derocher, Andrew E.

“…Climate-mediated sea ice declines have led to alterations in ecosystem composition, phenology, and primary productivity, potentially altering trophic dynamics…”
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Baleen as a biomonitor of mercury content and dietary history of North Atlantic Minke Whales ( Balaenopetra acutorostrata): combining elemental and stable isotope approaches by Hobson, K.A., Riget, F.F., Outridge, P.M., Dietz, R., Born, E.

“…Baleen is an incrementally-growing tissue of balaenopteran whales which preserves relatively well over time in museums and some archeological sites, and,…”
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Trophic relationships and pelagic–benthic coupling during summer in the Barents Sea Marginal Ice Zone, revealed by stable carbon and nitrogen isotope measurements by Tamelander, Tobias, Renaud, Paul E., Hop, Haakon, Carroll, Michael L., Ambrose, William G., Hobson, Keith A.

“…Food web structure and pathways from primary production were studied in pelagic, sympagic (ice-associated) and benthic communities during summer in a…”
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Seasonal changes in diets of seabirds in the North Water Polynya: a multiple-indicator approach by Karnovsky, Nina J., Hobson, Keith A., Iverson, Sara, Hunt, George L.

“…Each year, millions of seabirds migrate to the North Water Polynya, northern Baffin Bay, to feed in its productive waters during the 6 months that the polynya…”
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Spatial and seasonal variations in the pelagic–benthic coupling of the southeastern Beaufort Sea revealed by sedimentary biomarkers by Morata, Nathalie, Renaud, Paul E., Brugel, Sonia, Hobson, Keith A., Johnson, Beverly J.

“…Photosynthetic pigments and stable isotopes from suspended particulate organic matter (POM) and surface sediment of the southeast Beaufort Sea, including the…”
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From lavage to lipids: estimating diets of seabirds by Karnovsky, NJ, Hobson, KA, Iverson, SJ

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Geographical variation in carbon stable isotope signatures of marine predators: a tool to investigate their foraging areas in the Southern Ocean by Cherel, Yves, Hobson, Keith A.

“…Stable carbon isotope signatures (δ13C) are increasingly being used to determine the foraging habitats of consumers in the Southern Ocean. An underlying…”
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Trophic relationships among high Arctic seabirds: insights from tissue-dependent stable-isotope models by Hobson, Keith A.

“…The measurement of stable isotopes of nitrogen and carbon in tissues of marine consumers can provide trophic-level information that is a time-integrated…”
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STABLE ISOTOPES AND THE DETERMINATION OF AVIAN MIGRATORY CONNECTIVITY AND SEASONAL INTERACTIONS by Hobson, Keith A

“…The principle behind the application of SIA of avian tissues to infer migratory connectivity is simply that isotopic patterns in nature can be variable; when a…”
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Tracing Origins and Migration of Wildlife Using Stable Isotopes: A Review by Hobson, Keith A.

“…To understand the ecology of migratory animals it is important to link geographic regions used by individuals including breeding, wintering, and intermediate…”
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Combining stable-isotope (δδD) and band recovery data to improve probabilistic assignment of migratory birds to origin by Van Wilgenburg, Steven L, Hobson, Keith A

“…The recent application of stable-isotope analyses, particularly the use of stable-hydrogen-isotope (δδD) measurements of animal tissues, has greatly improved…”
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Anthropogenic contributions to mercury levels in present-day Arctic animals—A review by Dietz, Rune, Outridge, Peter M., Hobson, Keith A.

“…Because of concern about the recently increasing levels of biological Hg in some areas of the Arctic, we examined the literature concerning the long-term…”
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Global application of stable hydrogen and oxygen isotopes to wildlife forensics by Bowen, G.J, Wassenaar, L.I, Hobson, K.A

“…Stable isotopes are being increasingly used in wildlife forensics as means of determining the origin and movement of animals. The heavy isotope content of…”
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Conserving migratory land birds in the New World: Do we know enough? by Faaborg, John, Holmes, Richard T., Anders, Angela D., Bildstein, Keith L., Dugger, Katie M., Gauthreaux, Sidney A., Heglund, Patricia, Hobson, Keith A., Jahn, Alex E., Johnson, Douglas H., Latta, Steven C., Levey, Douglas J., Marra, Peter P., Merkord, Christopher L., Nol, Erica, Rothstein, Stephen I., Sherry, Thomas W., Sillett, T. Scott, Thompson, Frank R., Warnock, Nils

“…Migratory bird needs must be met during four phases of the year: breeding season, fall migration, wintering, and spring migration; thus, management may be…”
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Extending an indicator: year-round information on seabird trophic ecology from multiple-tissue stable-isotope analyses by Hobson, Keith A., Bond, Alexander L.

“…Stable isotope analysis of tissues of seabirds and their prey has proven to be an extremely useful tool in seabird dietary studies in general and in the…”
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Stable isotopes, beaks and predators: a new tool to study the trophic ecology of cephalopods, including giant and colossal squids by Cherel, Yves, Hobson, Keith A

“…N compared with lipid-free muscle tissues. Second, beaks from the same species showed a progressive increase in their δ…”
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Can carbon-13 in large herbivores reflect the canopy effect in temperate and boreal ecosystems? Evidence from modern and ancient ungulates by Drucker, Dorothée G., Bridault, Anne, Hobson, Keith A., Szuma, Elwira, Bocherens, Hervé

“…Local environmental conditions under dense canopy are known to result in depletion in 13C abundance in plants compared to an open land context. This canopy…”
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Nutrition, physiology, and stable isotopes: new information from fasting and molting penguins by Cherel, Yves, Hobson, Keith A., Bailleul, Frédéric, Groscolas, René

“…Stable isotopes are increasingly used in animal ecology, but little attention has been paid to the underlying physiological processes accounting for changes…”
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Mercury and other trace elements in a pelagic Arctic marine food web (Northwater Polynya, Baffin Bay) by Campbell, Linda M., Norstrom, Ross J., Hobson, Keith A., Muir, Derek C.G., Backus, Sean, Fisk, Aaron T.

“…Total mercury (THg), methylmercury (MeHg) and 22 other trace elements were measured in ice algae, three species of zooplankton, mixed zooplankton samples,…”
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Recent advances in understanding migration systems of New World land birds by Faaborg, John, Holmes, Richard T, Anders, Angela D, Bildstein, Keith L, Dugger, Katie M, Gauthreaux, Sidney A. Jr, Heglund, Patricia, Hobson, Keith A, Jahn, Alex E, Johnson, Douglas H, Latta, Steven C, Levey, Douglas J, Marra, Peter P, Merkord, Christopher L, Nol, Erica, Thompson, Frank R. III

“…Our understanding of migratory birds' year-round ecology and evolution remains patchy despite recent fundamental advances. Periodic reviews focus future…”
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