Fine-tuning the isotopic niche of a marine mammal community through a multi-element approach and variable spatial scales

Cani, Alessandra; Cardona, Luis; Aguilar, Álex; Borrell, Asunción; Drago, Massimiliano

doi:10.1016/j.ecss.2024.108641

Estuarine, Coastal and Shelf Science

2024

DOI: 10.1016/j.ecss.2024.108641

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Fine-tuning the isotopic niche of a marine mammal community through a multi-element approach and variable spatial scales

Alessandra Cani,

Luis Cardona,

Álex Aguilar

et al.

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Cited by 2 publications

References 62 publications

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The journey of loggerhead turtles from the Northwest Atlantic to the Mediterranean Sea as recorded by the stable isotope ratios of O, C and N of their bones

Cani,

Besén,

Carreras

et al. 2025

Marine Environmental Research

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The journey of loggerhead turtles from the Northwest Atlantic to the Mediterranean Sea as recorded by the stable isotope ratios of O, C and N of their bones

Cani,

Besén,

Carreras

et al. 2025

Marine Environmental Research

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Stable isotope ratios indicate trophic niche overlap in three sympatric delphinid species in the Eastern Ionian Sea

Borrell,

Tort,

Garcia‐Garin

et al. 2024

Marine Mammal Science

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Studying the sympatric ecology of closely related marine top predator species is of interest both from an ecological and conservation standpoint, because it provides insights into ecosystem functioning, how such species avoid competitive exclusion, and how human stressors may impact these patterns. In this study, we examine the isotopic niche of three sympatric dolphin species that inhabit the eastern Ionian Sea: the common dolphin (Delphinus delphis), the striped dolphin (Stenella coeruleoalba), and the common bottlenose dolphin (Tursiops truncatus). We used carbon, nitrogen, and sulfur isotope ratios to construct three‐dimensional isotope niches and calculate niche sizes and their overlaps among the three species to study interspecific competition for resources. Common dolphin niche overlapped with that of the striped dolphin by 77%, suggesting potential resource competition between these two species. The niche overlap between striped/common dolphins and bottlenose dolphins was much lower (47%). Large differences in isotopic ratios were found between the bottlenose dolphins of the Ionian Sea and those of a largely isolated population in the adjacent semienclosed Gulf of Ambracia, further corroborating the previously documented isolation between the two populations.

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Fine-tuning the isotopic niche of a marine mammal community through a multi-element approach and variable spatial scales

Cited by 2 publications

References 62 publications

The journey of loggerhead turtles from the Northwest Atlantic to the Mediterranean Sea as recorded by the stable isotope ratios of O, C and N of their bones

The journey of loggerhead turtles from the Northwest Atlantic to the Mediterranean Sea as recorded by the stable isotope ratios of O, C and N of their bones

Stable isotope ratios indicate trophic niche overlap in three sympatric delphinid species in the Eastern Ionian Sea

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