S. Newsome

Publications181
h-index36
Citations6,836
Highly Influential Citations460
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A niche for isotopic ecology
TLDR
To make isotopic measurements comparable to other niche formulations, this work proposes transforming δ-space to p-space, where axes represent relative proportions of isotopically distinct resources incorporated into an animal's tissues.
Using stable isotope biogeochemistry to study marine mammal ecology
TLDR
This review supplies a complete list of published SIA contributions to marine mammal science and highlights informative case examples in four general research areas: physiology and fractionation, foraging ecology and habitat use, ecotoxicology, and historic ecology and paleoecology.
Using Isoscapes to Trace the Movements and Foraging Behavior of Top Predators in Oceanic Ecosystems
The stable isotope composition of animal tissues can provide intrinsic tags to study the foraging and migratory ecology of predators in the open ocean. Chapter 13 (this volume) demonstrated that by…
Combining sources in stable isotope mixing models: alternative methods
TLDR
An option is a priori to combine sources with similar signatures so the number of sources is small enough to provide a unique solution, and contributions from functionally related groups of sources can be summed a posteriori, producing a range of solutions for the aggregate source that may be considerably narrower.
Agricultural origins and the isotopic identity of domestication in northern China
TLDR
The stable isotope methodology used here is probably the best means of detecting the symbiotic human–plant–animal linkages that develop during the very earliest phases of domestication and is thus applicable to the areas where these connections first emerged and are critical to explaining how and why agriculture began in East Asia.
Using stable isotopes to investigate individual diet specialization in California sea otters (Enhydra lutris nereis).
TLDR
Stable isotopes can provide an efficient tool for measuring individual- and population-level dietary breadth and may be useful for studying populations where longitudinal data on individuals would otherwise be impossible to acquire.
USING CARBON AND NITROGEN ISOTOPE VALUES TO INVESTIGATE MATERNAL STRATEGIES IN NORTHEAST PACIFIC OTARIIDS
TLDR
The study indicates that nitrogen, and in some cases carbon, isotopes can be used to assess reproductive strategies in marine mammals and when coupled with accurate age estimates based on bone growth regressions can be applied to historical or fossil otariids to gain insight into the flexibility of maternal strategies within and across species.
Pleistocene to recent dietary shifts in California condors.
TLDR
Investigation of changes in the diet of California condors using carbon and nitrogen isotopes found that establishing a marine mammal component in the condor diet may be an effective strategy for fostering viable condor populations independent of direct human subsidies.
Retrospective characterization of ontogenetic shifts in killer whale diets via δ 13 C and δ 15 N analysis of teeth
TLDR
Stable isotope analysis of teeth and/or bones may be the only means of evaluating a number of hypothesized historical dietary shifts in killer whales of the northeast Pacific Ocean, including unique historic ecological information that pre-dates modern studies.
Stable isotopes evaluate exploitation of anthropogenic foods by the endangered San Joaquin kit fox (Vulpes macrotis mutica)
Abstract The unprecedented rate of urbanization over the past several decades is a major concern for conservation globally and has given rise to the multidisciplinary field of urban ecology. This…
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