Jason Newton
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View article: Stable isotope data indicate origins of mislabelled historical bird specimens
Stable isotope data indicate origins of mislabelled historical bird specimens Open
Natural history specimens provide valuable insights across diverse research fields, but those needing more accurate metadata have limited scientific value. We applied stable isotope analysis to investigate the origin of 19 th century Atlan…
View article: The abundance, diversity, and assemblage structure of the macrobenthos at the South Georgia shelf methane seeps
The abundance, diversity, and assemblage structure of the macrobenthos at the South Georgia shelf methane seeps Open
A quarter of all marine methane, a potent greenhouse gas, is estimated to be hosted in Southern Ocean sediments. Climate change-induced ocean warming and ice shelf melting risk the stability of sedimentary gas hydrates, resulting in potent…
View article: Historical anthropogenic stressors affect bird ecology and feather development in neotropical forests
Historical anthropogenic stressors affect bird ecology and feather development in neotropical forests Open
Fragmentation and habitat loss driven by agricultural expansion have significantly affected bird ecology. Additionally, the growing use of agrochemicals impacts ecosystems and avian communities. Tools such as isotopic analysis provide reli…
View article: Rare Long‐Term Data Reveal the Seasonal Dietary Plasticity of Mandrills (<i>Mandrillus sphinx</i>) in Response to Fruiting Tree Phenology
Rare Long‐Term Data Reveal the Seasonal Dietary Plasticity of Mandrills (<i>Mandrillus sphinx</i>) in Response to Fruiting Tree Phenology Open
Understanding primate dietary plasticity provides insights into trait evolution and resilience to environmental change. Here, we investigate the feeding ecology of mandrills ( Mandrillus sphinx ), a species that forms groups of close to 10…
View article: Utilisation of Anthropogenic Food by Red Foxes (<scp><i>Vulpes vulpes</i></scp>) in Britain as Determined by Stable Isotope Analysis
Utilisation of Anthropogenic Food by Red Foxes (<span><i>Vulpes vulpes</i></span>) in Britain as Determined by Stable Isotope Analysis Open
Dietary analyses utilising visual methods to identify stomach and faecal contents have shown that urban red foxes ( Vulpes vulpes ) in Britain consume human‐derived (anthropogenic) food to varying degrees. Anthropogenic foods have been imp…
View article: Stable isotope evidence for suspended moult and age‐related differences in moult location in the trans‐Saharan migratory Alpine Swift
Stable isotope evidence for suspended moult and age‐related differences in moult location in the trans‐Saharan migratory Alpine Swift Open
Stable isotope analysis has been used extensively in migratory bird studies to provide ecological insights that may otherwise be difficult to obtain. However, an understanding of moult is critical for appropriate feather sampling, and here…
View article: Dissolved nitrogen uptake versus nitrogen fixation: Mode of nitrogen acquisition affects stable isotope signatures of a diazotrophic cyanobacterium and its grazer
Dissolved nitrogen uptake versus nitrogen fixation: Mode of nitrogen acquisition affects stable isotope signatures of a diazotrophic cyanobacterium and its grazer Open
Field studies suggest that changes in the stable isotope ratios of phytoplankton communities can be used to track changes in the utilization of different nitrogen sources, i.e., to detect shifts from dissolved inorganic nitrogen (DIN) upta…
View article: Diet of non-breeding leach’s storm-petrels (Hydrobates leucorhous) in the sub-polar frontal zone of the North Atlantic
Diet of non-breeding leach’s storm-petrels (Hydrobates leucorhous) in the sub-polar frontal zone of the North Atlantic Open
In order to understand the drivers of the distribution and abundance of pelagic seabirds it is necessary to know what they eat, yet there remains little detailed, geo-referenced information on the diets of pelagic seabird. In particular, d…
View article: Human habitat modification, not apex scavenger decline, drives isotopic niche variation in a carnivore community
Human habitat modification, not apex scavenger decline, drives isotopic niche variation in a carnivore community Open
Top carnivores can influence the structure of ecological communities, primarily through competition and predation; however, communities are also influenced by bottom-up forces such as anthropogenic habitat disturbance. Top carnivore declin…
View article: Low trophic redundancy among temperate wrasse species implies ecosystem risks associated with a multi-species inshore fishery
Low trophic redundancy among temperate wrasse species implies ecosystem risks associated with a multi-species inshore fishery Open
Understanding levels of resource-use overlap or trophic redundancy both within and between species can help predict ecosystem-level impacts of fishery removals and ultimately help define management priorities to preserve ecosystem function…
View article: Do sympatric catfish radiations in Lake Tanganyika show eco-morphological diversification?
Do sympatric catfish radiations in Lake Tanganyika show eco-morphological diversification? Open
Adaptive radiation is characterized by eco-morphological differentiation, in which niche partitioning has been shown to be a central response to natural selection during the diversification of animal clades. This process is suggested to ha…
View article: Using sulfur stable isotope ratios (δ <sup>34</sup> S) for animal geolocation: Estimating the delay mechanisms between diet ingestion and isotope incorporation in tail hair
Using sulfur stable isotope ratios (δ <sup>34</sup> S) for animal geolocation: Estimating the delay mechanisms between diet ingestion and isotope incorporation in tail hair Open
Rationale Metabolism and diet quality play an important role in determining delay mechanisms between an animal ingesting an element and depositing the associated isotope signal in tissue. While many isotope mixing models assume instantaneo…
View article: High spatial resolution assessment of air quality in urban centres using lichen carbon, nitrogen and sulfur contents and stable-isotope-ratio signatures
High spatial resolution assessment of air quality in urban centres using lichen carbon, nitrogen and sulfur contents and stable-isotope-ratio signatures Open
View article: Inter-colony and inter-annual variation in discard use by albatross chicks revealed using isotopes and regurgitates
Inter-colony and inter-annual variation in discard use by albatross chicks revealed using isotopes and regurgitates Open
Effective marine ecosystem monitoring is critical for sustainable management. Monitoring seabird diets can convey important information on ecosystem health and seabird–fishery interactions. The diet of breeding black-browed albatross ( Tha…
View article: Geolocator‐tracking seabird migration and moult reveal large‐scale, temperature‐driven isoscapes in the NE Atlantic
Geolocator‐tracking seabird migration and moult reveal large‐scale, temperature‐driven isoscapes in the NE Atlantic Open
Rationale By combining precision satellite‐tracking with blood sampling, seabirds can be used to validate marine carbon and nitrogen isoscapes, but it is unclear whether a comparable approach using low‐precision light‐level geolocators (GL…
View article: Tracking the British agricultural revolution through the isotopic analysis of dated parchment
Tracking the British agricultural revolution through the isotopic analysis of dated parchment Open
View article: Can diet niche partitioning enhance sexual dimorphism?
Can diet niche partitioning enhance sexual dimorphism? Open
Classic evolutionary theory suggests that sexual dimorphism evolves primarily via sexual and fecundity selection. However, theory and evidence are beginning to accumulate suggesting that resource competition can drive the evolution of sexu…
View article: Temporal dynamics in zooplankton δ13C and δ15N isoscapes for the North Atlantic Ocean: Decadal cycles, seasonality, and implications for predator ecology
Temporal dynamics in zooplankton δ13C and δ15N isoscapes for the North Atlantic Ocean: Decadal cycles, seasonality, and implications for predator ecology Open
The limited amount of ecological data covering offshore parts of the ocean impedes our ability to understand and anticipate the impact of anthropogenic stressors on pelagic marine ecosystems. Isoscapes, i.e., spatial models of the distribu…
View article: Can diet niche partitioning enhance sexual dimorphism?
Can diet niche partitioning enhance sexual dimorphism? Open
1. Classic evolutionary theory suggests that sexual dimorphism evolves primarily via sexual and fecundity selection. However, theory and evidence is beginning to accumulate suggesting that resource competition can drive the evolution of se…
View article: Comment on “Evidence of prehistoric human activity in the Falkland Islands”
Comment on “Evidence of prehistoric human activity in the Falkland Islands” Open
Stable isotopes from archaic Falkland Islands wolves ( Dusicyon australis ) indicate a high trophic, marine diet. Hamley et al. argue that this is consistent with mutualism with Yaghan people. However, most D. australis had similar isotopi…
View article: We are what we eat, plus some per mill: Using stable isotopes to estimate diet composition in<i>Gyps</i>vultures over space and time
We are what we eat, plus some per mill: Using stable isotopes to estimate diet composition in<i>Gyps</i>vultures over space and time Open
Dietary studies in birds of prey involve direct observation and examination of food remains at resting and nesting sites. Although these methods accurately identify diet in raptors, they are time‐consuming, resource‐intensive, and associat…
View article: A modern baseline for the paired isotopic analysis of skin and bone in terrestrial mammals
A modern baseline for the paired isotopic analysis of skin and bone in terrestrial mammals Open
We present the isotopic discrimination between paired skin and bone collagen from animals of known life history, providing a modern baseline for the interpretation of archaeological isotopic data. At present, the interpretation of inter-ti…
View article: We are what we eat, plus some per mill: Using stable isotopes to estimate diet composition in Gyps vultures over space and time.
We are what we eat, plus some per mill: Using stable isotopes to estimate diet composition in Gyps vultures over space and time. Open
1. Dietary studies in birds of prey involve direct observation and examination of food remains at resting and nesting sites. Although these methods accurately identify diet in raptors, they are time-consuming, resource-intensive, and assoc…
View article: Interspecific and intraspecific foraging differentiation of neighbouring tropical seabirds
Interspecific and intraspecific foraging differentiation of neighbouring tropical seabirds Open
Background Social interactions, reproductive demands and intrinsic constraints all influence foraging decisions in animals. Understanding the relative importance of these factors in shaping the way that coexisting species within communitie…
View article: An insect isoscape of UK and Ireland
An insect isoscape of UK and Ireland Open
Rationale The study of insect migration is problematic due to the small size of insects. Stable isotope analysis can be used to elucidate movement, either by geographic assignment of location of a species, or by simply distinguishing migra…
View article: Author response for "An insect isoscape of UK and Ireland"
Author response for "An insect isoscape of UK and Ireland" Open
View article: Author response for "An insect isoscape of UK and Ireland"
Author response for "An insect isoscape of UK and Ireland" Open
View article: A wolf in fox's clothing? Using stable isotopes to quantify ecological replacement
A wolf in fox's clothing? Using stable isotopes to quantify ecological replacement Open
Ecological replacement as a conservation tool presupposes that nonnative taxa can restore degraded ecosystems by performing the ecological functions of extinct taxa. This assumption is rarely tested however, largely because it is difficult…
View article: Sexual segregation of gannet foraging over 11 years: movements vary but isotopic differences remain stable
Sexual segregation of gannet foraging over 11 years: movements vary but isotopic differences remain stable Open
Sex-specific niche differentiation is common in marine vertebrates, but how this varies long-term is poorly understood. Here we investigated interannual variation in sexual segregation among breeding northern gannets Morus bassanus , wide-…
View article: Mercury Speciation in Scottish Raptors Reveals Potential Uptake or Formation of Mercury Selenide Nanoparticles in Scottish Golden Eagles (Aquila Chrysaetos)
Mercury Speciation in Scottish Raptors Reveals Potential Uptake or Formation of Mercury Selenide Nanoparticles in Scottish Golden Eagles (Aquila Chrysaetos) Open