Species-specific trophic discrimination factors can reduce the uncertainty of stable isotope analyses

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F24%3A43908147" target="_blank" >RIV/60076658:12520/24:43908147 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/s10750-024-05513-6" target="_blank" >https://doi.org/10.1007/s10750-024-05513-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10750-024-05513-6" target="_blank" >10.1007/s10750-024-05513-6</a>

Result language

angličtina

Original language name

Species-specific trophic discrimination factors can reduce the uncertainty of stable isotope analyses

Original language description

Stable isotope analysis has been broadly used to study food webs, but often relies on inaccurate assumptions of trophic isotopic discriminations, which could lead to misinterpretation of obtained results. While many taxa exhibit similar trophic discrimination factors (TDFs), crayfish, exhibit omnivorous feeding strategies, yet TDFs are missing. In this study, we determined TDFs and tissue biokinetic parameters of the marbled crayfish Procambarus virginalis as a model species. Moreover, we compared commonly used TDFs and those determined from this study and applied them across species and ecosystems as a first attempt to compare the effect of species-specific TDFs in Bayesian trophic mixing models. Our results revealed differences between the TDFs of different tissues and biokinetic parameters of crayfish. Our result also revealed TDFs differences between crayfish relying mostly on plants versus those relying on an animal diet. We found differences of TDF suitability among species and ecosystems, highlighting the need for specific TDFs for different crayfish species. This study improves our understanding and the need for species-calibrated TDFs for robust statistical analysis of stable isotope data. Our approach is widely applicable across taxa and ecosystems to reduce the bias introduced by using unspecific TDFs in Bayesian mixing models.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10618 - Ecology

Project

<a href="/en/project/GA19-04431S" target="_blank" >GA19-04431S: Temperature driven changes in interactions and ecological roles of prominent crayfish invaders</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Hydrobiologia

ISSN

0018-8158

e-ISSN

1573-5117

Volume of the periodical

851

Issue of the periodical within the volume

14

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

17

Pages from-to

3471-3487

UT code for WoS article

001204647500004

EID of the result in the Scopus database

2-s2.0-85190818001