Invasive gibel carp use vacant space and occupy lower trophic niche compared to endangered native crucian carp

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F23%3A00583550" target="_blank" >RIV/60077344:_____/23:00583550 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41210/23:95458 RIV/60076658:12310/23:43907300

Result on the web

<a href="https://doi.org/10.1007/s10530-023-03081-9" target="_blank" >https://doi.org/10.1007/s10530-023-03081-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10530-023-03081-9" target="_blank" >10.1007/s10530-023-03081-9</a>

Result language

angličtina

Original language name

Invasive gibel carp use vacant space and occupy lower trophic niche compared to endangered native crucian carp

Original language description

The introduction of invasive species increases interspecific competition with native species, especially if the invasive fish have a similar ecological role in the ecosystem. The vacant niche hypothesis postulates that an invasive species may be a stronger competitor if it has, additionally to a native species niche, access to a food unavailable to native species. However, there are very few model examples of nearly identical invasive and native species differing in trophic niche utilization. The once common crucian carp (Carassius carassius) has become endangered or extirpated in many regions of Europe mainly due to the invasion of gibel carp (C. gibelio). To estimate the trophic niche divergence between gibel and crucian carp living in syntopy, a non-lethal method of stable isotope analysis (SIA) of fish scales (delta C-13 and delta N-15) was employed. Samples were collected from four sites in the Czech Republic to determine the overlap and sizes of the trophic niches of these two species. The results showed that at two sites, gibel carp had significantly lower delta N-15 than crucian carp, indicating its lower trophic position. The gibel carp also significantly higher delta C-13 at two sites indicating higher utilization of littoral sources compared to crucian carp. In addition, isotopic niches partially overlapped at the four study sites, with the most divergent trophic niches found in the macrophyte-rich site. Finally, the gibel carp had higher probability to occur within the crucian carp niche space than vice versa. Our results provide support for the vacant niche hypothesis, indicating that invasive gibel carp gain a competitive advantage over the native crucian carp via feeding on plant material that is underexploited by native crucian carp. Furthermore, data suggest that more 'natural' environmental conditions, such as a rich littoral zone, may help to decrease isotopic niche overlap between the two species. Lower trophic position and higher reliance on unexploited food sources seem to contribute to the competitive superiority of the invasive gibel carp over the native crucian carp.

Czech name

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Czech description

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Type

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

CEP classification

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OECD FORD branch

10618 - Ecology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Biological Invasions

ISSN

1387-3547

e-ISSN

1573-1464

Volume of the periodical

25

Issue of the periodical within the volume

9

Country of publishing house

DE - GERMANY

Number of pages

12

Pages from-to

2917-2928

UT code for WoS article

000985233400001

EID of the result in the Scopus database

2-s2.0-85159054253