Stable hydrogen isotope variability within and among plumage tracts (δ2HF) of a migratory wood warbler. gan Gary R Graves, Seth D Newsome, Marilyn L Fogel

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Editorial: New frontiers in the application of stable isotopes to ecological and ecophysiological research gan Keith A. Hobson, Keith A. Hobson, John P. Whiteman, Seth D. Newsome

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Meta‐analysis of primary producer amino acid δ15N values and their influence on trophic position estimation gan Matthew D. Ramirez, Alexi C. Besser, Seth D. Newsome, Kelton W. McMahon

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A Guide to Using Compound-Specific Stable Isotope Analysis to Study the Fates of Molecules in Organisms and Ecosystems gan John P. Whiteman, Emma A. Elliott Smith, Alexi C. Besser, Seth D. Newsome

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Use of amino acid isotope analysis to investigate capital versus income breeding strategies in migratory avian species gan Nico Lübcker, John P. Whiteman, Oliver N. Shipley, Keith A. Hobson, Seth D. Newsome

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Using Satellite Tracking and Isotopic Information to Characterize the Impact of South American Sea Lions on Salmonid Aquaculture in Southern Chile. gan Maritza Sepúlveda, Seth D Newsome, Guido Pavez, Doris Oliva, Daniel P Costa, Luis A Hückstädt

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Physiology Drives Reworking of Amino Acid δ2H and δ13C in Butterfly Tissues gan Kaycee E. Morra, Seth D. Newsome, Gary R. Graves, Gary R. Graves, Marilyn L. Fogel

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Exploring the isotopic niche: isotopic variance, physiological incorporation, and the temporal dynamics of foraging gan Justin Douglas Yeakel, Justin Douglas Yeakel, Uttam eBhat, Uttam eBhat, Emma S Elliott Smith, Seth D Newsome

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Agricultural input modifies trophic niche and basal energy source of a top predator across human-modified landscapes gan André C. Pereira, André C. Pereira, Christy J. Mancuso, Seth D. Newsome, Gabriela B. Nardoto, Guarino R. Colli

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Estimating blue whale skin isotopic incorporation rates and baleen growth rates: Implications for assessing diet and movement patterns in mysticetes. gan Geraldine Busquets-Vass, Seth D Newsome, John Calambokidis, Gabriela Serra-Valente, Jeff K Jacobsen, Sergio Aguíñiga-García, Diane Gendron

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Reductions in the dietary niche of southern sea otters (Enhydra lutris nereis) from the Holocene to the Anthropocene gan Emma A. Elliott Smith, Martin Tim Tinker, Emily L. Whistler, Douglas J. Kennett, René L. Vellanoweth, Diane Gifford‐Gonzalez, Mark G. Hylkema, Seth D. Newsome

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A Strong Link Between Oceanographic Conditions and Zooplankton δ¹³C and δ¹⁵N Values in the San Jorge Gulf, Argentina gan David Edgardo Galván, Manuela Funes, Flavio Emiliano Paparazzo, Virginia Alonso Roldán, Carla Derisio, Juan Pablo Pisoni, Brenda Temperoni, Daniela Alejandra del Valle, Valeria Segura, Seth D. Newsome

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Triple Oxygen Isotope Measurements (Δ'17O) of Body Water Reflect Water Intake, Metabolism, and δ18O of Ingested Water in Passerines gan Pablo Sabat, Pablo Sabat, Seth D. Newsome, Stephanie Pinochet, Roberto Nespolo, Roberto Nespolo, Roberto Nespolo, Juan Carlos Sanchez-Hernandez, Karin Maldonado, Alexander R. Gerson, Zachary D. Sharp, John P. Whiteman

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Spatiotemporal variation in the gut microbiomes of co‐occurring wild rodent species gan Bianca R. P. Brown, Leo M. Khasoha, Peter Lokeny, Rhiannon P. Jakopak, Courtney G. Reed, Marissa Dyck, Alois Wambua, Seth D. Newsome, Todd M. Palmer, Robert M. Pringle, Jacob R. Goheen, Tyler R. Kartzinel

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Using stable isotopes to measure the dietary responses of Costa Rican forest birds to agricultural countryside gan Çağan H. Şekercioğlu, Çağan H. Şekercioğlu, Çağan H. Şekercioğlu, Çağan H. Şekercioğlu, Melissa J. Fullwood, Thure E. Cerling, Thure E. Cerling, Federico Oviedo Brenes, Gretchen C. Daily, Paul R. Ehrlich, Page Chamberlain, Seth D. Newsome

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A multi-isotope approach reveals seasonal variation in the reliance on marine resources, production of metabolic water, and ingestion of seawater by two species of coastal passerin... gan Lucas Navarrete, Lucas Navarrete, Nico Lübcker, Felipe Alvarez, Felipe Alvarez, Roberto Nespolo, Roberto Nespolo, Roberto Nespolo, Juan Carlos Sanchez-Hernandez, Karin Maldonado, Zachary D. Sharp, John P. Whiteman, Seth D. Newsome, Pablo Sabat, Pablo Sabat

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Sex- and age-specific migratory strategies of blue whales in the northeast Pacific Ocean gan Christina Blevins, Geraldine Busquets-Vass, Geraldine Busquets-Vass, Mario A. Pardo, Diane Gendron, Jeff K. Jacobsen, Francisco Gómez-Díaz, Héctor Pérez-Puig, Christian Daniel Ortega-Ortiz, Gisela Heckel, Jorge Urbán R, Lorena Viloria-Gómora, Seth D. Newsome

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Mitochondrial genomes suggest rapid evolution of dwarf California Channel Islands foxes (Urocyon littoralis). gan Courtney A Hofman, Torben C Rick, Melissa T R Hawkins, W Chris Funk, Katherine Ralls, Christina L Boser, Paul W Collins, Tim Coonan, Julie L King, Scott A Morrison, Seth D Newsome, T Scott Sillett, Robert C Fleischer, Jesus E Maldonado

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Integrative Physiological Responses to Acute Dehydration in the Rufous-Collared Sparrow: Metabolic, Enzymatic, and Oxidative Traits gan Lucas Navarrete, Lucas Navarrete, Francisco Bozinovic, Isaac Peña-Villalobos, Isaac Peña-Villalobos, Carolina Contreras-Ramos, Carolina Contreras-Ramos, Carolina Contreras-Ramos, Juan C. Sanchez-Hernandez, Seth D. Newsome, Roberto F. Nespolo, Roberto F. Nespolo, Roberto F. Nespolo, Pablo Sabat, Pablo Sabat

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Infrastructure to factorially manipulate the mean and variance of precipitation in the field gan Jennifer A. Rudgers, Anthony Luketich, Melissa Bacigalupa, Lauren E. Baur, Scott L. Collins, Kristofer M. Hall, Enqing Hou, Marcy E. Litvak, Yiqi Luo, Tom E. X. Miller, Seth D. Newsome, William T. Pockman, Andrew D. Richardson, Alex Rinehart, Melissa Villatoro‐Castañeda, Brooke E. Wainwright, Samantha J. Watson, Purbendra Yogi, Yu Zhou

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