Isotopic niche in the eastern long-necked turtle, Chelodina longicollis (Testudines: Chelidae), along a natural-urban gradient in southeastern Australia

Bruno DE OLIVEIRA FERRONATO, Thiago Marques, Neliton Lara, Luiz Martinelli, Luciano Verdade, Plinio Camargo, John Roe, Arthur GEORGES

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Urbanisation is one of the most common threats to many native species, while others are capable of taking advantage of urban areas and even expanding their niche in urban-natural systems. The analysis of stable isotopes of carbon and nitrogen in a tissue sample provides data that can elucidate food web dynamics and trophic ecology of an animal. Our study aimed to evaluate variation in food resource exploitation in the freshwater turtle Chelodina longicollis along a habitat gradient (natural, rural, and suburban areas), and intraspecific niche variation among demographic groups (juvenile, adult male, adult female). We found that isotopic composition of C. longicollis varied along the habitat gradient, with δ15N levels highest in suburban environments, intermediate in rural areas, and lowest in the nature reserve. δ13C values were higher in suburb and rural turtles compared to those on the nature reserve. Besides some intraspecific differences in δ13C as evidence of demographic partitioning of the foraging niche, demographic groups apparently feed on the same trophic level within habitats. Our study included samples from small juveniles (<10 cm) and helped to cover a gap of understanding in intraspecific niche for C. longicollis. Future research should evaluate the reasons turtles in suburban areas are enriched in δ 15N, either because they are foraging on different trophic levels or because they are feeding on prey enriched in nitrogen.

    Original languageEnglish
    Pages (from-to)297-304
    Number of pages8
    JournalHerpetological Journal
    Volume26
    Issue number4
    Publication statusPublished - Oct 2016

    Fingerprint

    Chelidae
    Testudines
    turtle
    turtles
    niche
    niches
    suburban areas
    demographic statistics
    suburban area
    nature reserve
    rural areas
    trophic level
    rural area
    conservation areas
    habitat
    habitats
    foraging
    animal ecology
    nitrogen
    urbanization

    Cite this

    DE OLIVEIRA FERRONATO, Bruno ; Marques, Thiago ; Lara, Neliton ; Martinelli, Luiz ; Verdade, Luciano ; Camargo, Plinio ; Roe, John ; GEORGES, Arthur. / Isotopic niche in the eastern long-necked turtle, Chelodina longicollis (Testudines: Chelidae), along a natural-urban gradient in southeastern Australia. In: Herpetological Journal. 2016 ; Vol. 26, No. 4. pp. 297-304.
    @article{b27fdef5b6d444a38f61f5228c34445c,
    title = "Isotopic niche in the eastern long-necked turtle, Chelodina longicollis (Testudines: Chelidae), along a natural-urban gradient in southeastern Australia",
    abstract = "Urbanisation is one of the most common threats to many native species, while others are capable of taking advantage of urban areas and even expanding their niche in urban-natural systems. The analysis of stable isotopes of carbon and nitrogen in a tissue sample provides data that can elucidate food web dynamics and trophic ecology of an animal. Our study aimed to evaluate variation in food resource exploitation in the freshwater turtle Chelodina longicollis along a habitat gradient (natural, rural, and suburban areas), and intraspecific niche variation among demographic groups (juvenile, adult male, adult female). We found that isotopic composition of C. longicollis varied along the habitat gradient, with δ15N levels highest in suburban environments, intermediate in rural areas, and lowest in the nature reserve. δ13C values were higher in suburb and rural turtles compared to those on the nature reserve. Besides some intraspecific differences in δ13C as evidence of demographic partitioning of the foraging niche, demographic groups apparently feed on the same trophic level within habitats. Our study included samples from small juveniles (<10 cm) and helped to cover a gap of understanding in intraspecific niche for C. longicollis. Future research should evaluate the reasons turtles in suburban areas are enriched in δ 15N, either because they are foraging on different trophic levels or because they are feeding on prey enriched in nitrogen.",
    keywords = "Diet, Generalist species, Intraspecific variation, Isotopic ecology, Nitrogen",
    author = "{DE OLIVEIRA FERRONATO}, Bruno and Thiago Marques and Neliton Lara and Luiz Martinelli and Luciano Verdade and Plinio Camargo and John Roe and Arthur GEORGES",
    year = "2016",
    month = "10",
    language = "English",
    volume = "26",
    pages = "297--304",
    journal = "Herpetological Journal",
    issn = "0268-0130",
    publisher = "British Herpetological Society",
    number = "4",

    }

    DE OLIVEIRA FERRONATO, B, Marques, T, Lara, N, Martinelli, L, Verdade, L, Camargo, P, Roe, J & GEORGES, A 2016, 'Isotopic niche in the eastern long-necked turtle, Chelodina longicollis (Testudines: Chelidae), along a natural-urban gradient in southeastern Australia', Herpetological Journal, vol. 26, no. 4, pp. 297-304.

    Isotopic niche in the eastern long-necked turtle, Chelodina longicollis (Testudines: Chelidae), along a natural-urban gradient in southeastern Australia. / DE OLIVEIRA FERRONATO, Bruno; Marques, Thiago; Lara, Neliton; Martinelli, Luiz; Verdade, Luciano; Camargo, Plinio; Roe, John; GEORGES, Arthur.

    In: Herpetological Journal, Vol. 26, No. 4, 10.2016, p. 297-304.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Isotopic niche in the eastern long-necked turtle, Chelodina longicollis (Testudines: Chelidae), along a natural-urban gradient in southeastern Australia

    AU - DE OLIVEIRA FERRONATO, Bruno

    AU - Marques, Thiago

    AU - Lara, Neliton

    AU - Martinelli, Luiz

    AU - Verdade, Luciano

    AU - Camargo, Plinio

    AU - Roe, John

    AU - GEORGES, Arthur

    PY - 2016/10

    Y1 - 2016/10

    N2 - Urbanisation is one of the most common threats to many native species, while others are capable of taking advantage of urban areas and even expanding their niche in urban-natural systems. The analysis of stable isotopes of carbon and nitrogen in a tissue sample provides data that can elucidate food web dynamics and trophic ecology of an animal. Our study aimed to evaluate variation in food resource exploitation in the freshwater turtle Chelodina longicollis along a habitat gradient (natural, rural, and suburban areas), and intraspecific niche variation among demographic groups (juvenile, adult male, adult female). We found that isotopic composition of C. longicollis varied along the habitat gradient, with δ15N levels highest in suburban environments, intermediate in rural areas, and lowest in the nature reserve. δ13C values were higher in suburb and rural turtles compared to those on the nature reserve. Besides some intraspecific differences in δ13C as evidence of demographic partitioning of the foraging niche, demographic groups apparently feed on the same trophic level within habitats. Our study included samples from small juveniles (<10 cm) and helped to cover a gap of understanding in intraspecific niche for C. longicollis. Future research should evaluate the reasons turtles in suburban areas are enriched in δ 15N, either because they are foraging on different trophic levels or because they are feeding on prey enriched in nitrogen.

    AB - Urbanisation is one of the most common threats to many native species, while others are capable of taking advantage of urban areas and even expanding their niche in urban-natural systems. The analysis of stable isotopes of carbon and nitrogen in a tissue sample provides data that can elucidate food web dynamics and trophic ecology of an animal. Our study aimed to evaluate variation in food resource exploitation in the freshwater turtle Chelodina longicollis along a habitat gradient (natural, rural, and suburban areas), and intraspecific niche variation among demographic groups (juvenile, adult male, adult female). We found that isotopic composition of C. longicollis varied along the habitat gradient, with δ15N levels highest in suburban environments, intermediate in rural areas, and lowest in the nature reserve. δ13C values were higher in suburb and rural turtles compared to those on the nature reserve. Besides some intraspecific differences in δ13C as evidence of demographic partitioning of the foraging niche, demographic groups apparently feed on the same trophic level within habitats. Our study included samples from small juveniles (<10 cm) and helped to cover a gap of understanding in intraspecific niche for C. longicollis. Future research should evaluate the reasons turtles in suburban areas are enriched in δ 15N, either because they are foraging on different trophic levels or because they are feeding on prey enriched in nitrogen.

    KW - Diet

    KW - Generalist species

    KW - Intraspecific variation

    KW - Isotopic ecology

    KW - Nitrogen

    UR - http://www.scopus.com/inward/record.url?scp=85023768988&partnerID=8YFLogxK

    M3 - Article

    VL - 26

    SP - 297

    EP - 304

    JO - Herpetological Journal

    JF - Herpetological Journal

    SN - 0268-0130

    IS - 4

    ER -