Disentangling environmental from individual factors in isotopic ecology: A 17-year longitudinal study in a long-lived seabird exploiting the Canary Current

Ramos, Raül; Reyes‐González, José Manuel; Morera‐Pujol, Virginia; Zajková, Zuzana; Militão, Teresa; González‐Solís, Jacob

doi:10.1016/j.ecolind.2019.105963

Cited by 10 publications

(3 citation statements)

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“…For instance, δ 13 C values of GPS‐tracked Cory's shearwater ( Calonectris borealis ) plasma showed inshore‐offshore and chlorophyll‐driven variation in δ 13 C values, whereas δ 15 N values tended to vary temporally 37 . Moreover, long‐term (17‐year) feather isotope sampling of Cory's shearwaters revealed that both δ 13 C and δ 15 N values covaried with upwelling intensity in the CCLME 41 . It might therefore be desirable to combine GPS and GLS‐derived isotope values from multiple taxa to generate a more detailed picture of isotopic variability in space and time.…”

Section: Discussionmentioning

confidence: 99%

Geolocator‐tracking seabird migration and moult reveal large‐scale, temperature‐driven isoscapes in the NE Atlantic

Atkins

Bearhop

Bodey

et al. 2023

Rapid Comm Mass Spectrometry

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RationaleBy 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 (GLS) and feather sampling can be similarly effective.MethodsHere we used GLS to identify wintering areas of northern gannets (Morus bassanus) and sampled winter grown feathers (confirmed from image analysis of non‐breeding birds) to test for spatial gradients in δ13C and δ15N in the NE Atlantic.ResultsBy matching winter‐grown feathers with the non‐breeding location of tracked birds we found latitudinal gradients in δ13C and δ15N in neritic waters. Moreover, isotopic patterns were best explained by sea surface temperature. Similar isotope gradients were found in fish muscle sampled at local ports.ConclusionsOur study reveals the potential of using seabird GLS and feathers to reconstruct large‐scale isotopic patterns.

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Section: Discussionmentioning

confidence: 99%

Geolocator‐tracking seabird migration and moult reveal large‐scale, temperature‐driven isoscapes in the NE Atlantic

Atkins

Bearhop

Bodey

et al. 2023

Rapid Comm Mass Spectrometry

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“…–0.018‰ per year across the entire North Atlantic basin; Quay et al., 2007), to calculate annual corrections (e.g. Espinasse et al., 2019; Matthews & Ferguson, 2014; Ramos et al., 2020; Rossman et al., 2013; Soto et al., 2018). An improved version of this approach incorporates an increase in the rate of δ 13 C decline after a specific year (e.g.…”

Section: Background and Theorymentioning

confidence: 99%

SuessR: Regional corrections for the effects of anthropogenic CO₂ on δ¹³C data from marine organisms

et al. 2021

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“…Global change is expected to increase variation in the availability of resources (Jia et al, 2019), and within-population variability in resource use may increase its resilience to environmental change (Ramos et al, 2020; Riverón et al, 2021). Trophic niche differences between age classes have been a key focus of population-level research, while more recently, individual specialization, where individuals utilize narrower resource ranges than their population, has gained interest (Costa-Pereira et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

The Interplay of Ecological Opportunity and Adult Foraging Strategies in Juvenile Sparrow Individual Specialization

Ricote,

Weinberger,

Ramírez-Otarola

et al. 2024

Preprint

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Temporal variation in resource availability, amplified by global change, may have strong impacts on species breeding at temperate and high latitudes that cue their reproduction to exploit seasonal resource pulses. This study examines how resource availability (ecological opportunity) and parental care influence niche partitioning between and within age classes in the rufous-collared sparrow, which provides extensive parental care. We hypothesized juveniles would exhibit narrower niches focused on high-quality resources compared to adults, regardless of ecological opportunity. We used stable isotope analysis to quantify individual and population niches in juveniles and adults across the breeding season in two cohorts experiencing contrasting resource landscapes. Contrary to our initial hypothesis, juveniles exhibited greater individual specialization and smaller total niche widths during periods when resource availability was high in comparison to periods of low ecological opportunity. Interestingly, niche characteristics of adults remained stable across seasons despite a shift in trophic level, highlighting their potential role in providing a consistent diet for their young. These findings reveal a dynamic interplay between ecological opportunity, parental care, and individual specialization, with important implications for understanding population resilience under variable resource scenarios. The study also suggests that adult sparrows adapt their provisioning strategies based on ecological opportunity, potentially buffering offspring from environmental fluctuations. Understanding age-specific responses to resource variation is crucial for predicting species responses to ecological conditions, particularly in regions like central Chile where seasonal resource limitation is expected to become more variable in response to climate change.

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Disentangling environmental from individual factors in isotopic ecology: A 17-year longitudinal study in a long-lived seabird exploiting the Canary Current

Cited by 10 publications

References 116 publications

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

SuessR: Regional corrections for the effects of anthropogenic CO₂ on δ¹³C data from marine organisms

The Interplay of Ecological Opportunity and Adult Foraging Strategies in Juvenile Sparrow Individual Specialization

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Disentangling environmental from individual factors in isotopic ecology: A 17-year longitudinal study in a long-lived seabird exploiting the Canary Current

Cited by 10 publications

References 116 publications

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

SuessR: Regional corrections for the effects of anthropogenic CO2 on δ13C data from marine organisms

The Interplay of Ecological Opportunity and Adult Foraging Strategies in Juvenile Sparrow Individual Specialization

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SuessR: Regional corrections for the effects of anthropogenic CO₂ on δ¹³C data from marine organisms