Applications of stable isotope analysis in mammalian ecology

Walter, W. David; Kurle, Carolyn M.; Hopkins, John B.

doi:10.1080/10256016.2014.933214

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…Foran et al 1997), hormonal and stress levels (Koren et al 2002, Macbeth et al 2010, diet reconstruction based on carbon and nitrogen isotope values (e.g. Hobson et al 2000, Mitani et al 2009, Walter et al 2014) and exposure to environmental contamination (e.g. Pereira et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Non-invasive hair sampling of Neotropical otters

et al. 2018

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Sampling wild animal populations using non-invasive techniques is advised when dealing with threatened species. Hair samples provide ecological information like species and individual identification. However, hair trapping is scarcely used in otters, due to their aquatic habits. Most studies are with captive individuals, so there is the need to test non-invasive hair trapping methods in otters in the wild. The aim of this study was to develop a simple and cost-effective method to collect hair from otter species in a non-invasive way. The study was carried out in the Paranapanema River, São Paulo State, Brazil, with the Neotropical otter (Lontra longicaudis Olfers, 1818), a protected species. Hair traps (wooden sticks and tree roots with adhesive tape or wax bands) were set during six nights on river banks, otter trails and scent-marking sites. Traps were baited with otter fresh spraints from other river locations. From the 23 traps, 10 (43.7%) were successful in collecting otter hairs, mostly guard-hair. The sticks were much more efficient than the roots at capturing otter hair (70.6.% vs. 0%) as well as adhesive tape when compared to wax (71.4% vs. 0%). Method simplicity and efficiency suggest that it can be a cost-effective way for collecting otter hairs without the need for capturing individuals. This method can be used for: assessment of local otter distribution; collecting otter hair samples for sex and individual identification (by molecular analysis), trophic ecology (by isotopic analyses), ecotoxicology (by contamination analysis) or behaviour ecology (by hormonal and stress levels analysis). More trapping campaigns should be implemented to further test the method's efficiency.

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Section: Introductionmentioning

confidence: 99%

Non-invasive hair sampling of Neotropical otters

et al. 2018

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“…Some manifestations of the isotope effects of certain elements under natural conditions have been studied and published [5]. However, it is extremely important to know the mechanisms of isotope effects to understand the specific features and reconstruction mechanisms of physiological processes in plants and animals, depending on their geographical origin and habitat [6]. This approach makes it possible to use different isotope concentration values obtained from studies to characterize biological objects [7], including clarification of the specific features of biochemical processes and reaction mechanisms, as well as the reconstruction of climatic, physiological, ecological, and environmental conditions during a certain period in the vital activities of organisms [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Possible Mechanisms of Biological Effects Observed in Living Systems during 2H/1H Isotope Fractionation and Deuterium Interactions with Other Biogenic Isotopes

et al. 2019

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This article presents the original descriptions of some recent physics mechanisms (based on the thermodynamic, kinetic, and quantum tunnel effects) providing stable 2H/1H isotope fractionation, leading to the accumulation of particular isotopic forms in intra- or intercellular space, including the molecular effects of deuterium interaction with 18O/17O/16O, 15N/14N, 13C/12C, and other stable biogenic isotopes. These effects were observed mainly at the organelle (mitochondria) and cell levels. A new hypothesis for heavy nonradioactive isotope fractionation in living systems via neutron effect realization is discussed. The comparative analysis of some experimental studies results revealed the following observation: “Isotopic shock” is highly probable and is observed mostly when chemical bonds form between atoms with a summary odd number of neutrons (i.e., bonds with a non-compensated neutron, which correspond to the following equation: Nn − Np = 2k + 1, where k ϵ Z, k is the integer, Z is the set of non-negative integers, Nn is number of neutrons, and Np is number of protons of each individual atom, or in pair of isotopes with a chemical bond). Data on the efficacy and metabolic pathways of the therapy also considered 2H-modified drinking and diet for some diseases, such as Alzheimer’s disease, Friedreich’s ataxia, mitochondrial disorders, diabetes, cerebral hypoxia, Parkinson’s disease, and brain cancer.

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“…Studies focused on the mechanisms of species coexistence and resource partitioning are typically limited to one or a few temporal snapshots within modern or palaeontological time frames (see reviews in Crawford, McDonald, & Bearhop, 2008;Koch, Fox-Dobbs, & Newsome, 2009;Reid, Greenwald, Wang, & Wilmers, 2013;Walter, Kurle, & Hopkins, 2014). Yet it is well known that communities are dynamic, with constituent species shifting in myriad ways across a range of temporal scales in response to environmental change, including in their abundance, geographic position, phenology and behaviour (Blois, McGuire, & Hadly, 2010;Grayson, 2000a;Koch et al, 2009;Lyons, 2003;Mantyka-pringle, Martin, & Rhodes, 2011;Parmesan, 2006;Reid et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Isotopic niche variation from the Holocene to today reveals minimal partitioning and individualistic dynamics among four sympatric desert mice

Terry

2017

Journal of Animal Ecology

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Species interact with each other and their environment over a range of temporalscales, yet our understanding of resource partitioning and the mechanisms of species coexistence is largely restricted to modern time-scales of years to decades.Furthermore, the relative magnitudes of inter-vs. intraspecific variation in resource use are rarely considered, despite the potential for the latter to influence a species' ability to cope with changing environmental conditions. 5. These observations suggest that each species' resource use changed individualistically over the Holocene, hence niche dynamics are poorly explained by the hypothesis of temporally stable species interactions at millennial time-scales. Furthermore, changes to the resource base over the last century (likely due to the spread of

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Applications of stable isotope analysis in mammalian ecology

Cited by 8 publications

References 14 publications

Non-invasive hair sampling of Neotropical otters

Non-invasive hair sampling of Neotropical otters

Possible Mechanisms of Biological Effects Observed in Living Systems during 2H/1H Isotope Fractionation and Deuterium Interactions with Other Biogenic Isotopes

Isotopic niche variation from the Holocene to today reveals minimal partitioning and individualistic dynamics among four sympatric desert mice

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