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Trophic Position of the Species and Site Trophic State Affect Diet Niche and Individual Specialization: From Apex Predator to Herbivore

SIMPLE SUMMARY: Niche widths and individual specialization were studied based on the isotopic signals, but using the innovative and non-lethal approach. We analyzed four different body tissues with different isotopic half-lives, and revealed crucial results on trophic interactions of fish. We assume...

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Autores principales: Vejřík, Lukáš, Vejříková, Ivana, Blabolil, Petr, Sajdlová, Zuzana, Kočvara, Luboš, Kolařík, Tomáš, Bartoň, Daniel, Jůza, Tomáš, Šmejkal, Marek, Peterka, Jiří, Čech, Martin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10452534/
https://www.ncbi.nlm.nih.gov/pubmed/37626997
http://dx.doi.org/10.3390/biology12081113
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author Vejřík, Lukáš
Vejříková, Ivana
Blabolil, Petr
Sajdlová, Zuzana
Kočvara, Luboš
Kolařík, Tomáš
Bartoň, Daniel
Jůza, Tomáš
Šmejkal, Marek
Peterka, Jiří
Čech, Martin
author_facet Vejřík, Lukáš
Vejříková, Ivana
Blabolil, Petr
Sajdlová, Zuzana
Kočvara, Luboš
Kolařík, Tomáš
Bartoň, Daniel
Jůza, Tomáš
Šmejkal, Marek
Peterka, Jiří
Čech, Martin
author_sort Vejřík, Lukáš
collection PubMed
description SIMPLE SUMMARY: Niche widths and individual specialization were studied based on the isotopic signals, but using the innovative and non-lethal approach. We analyzed four different body tissues with different isotopic half-lives, and revealed crucial results on trophic interactions of fish. We assume that the observed trends will occur in other food webs with similar trophic positions. For example, the apex predator status of ectotherms is linked to the individual size, not to the species. In addition, thanks to the consideration of the site trophic state (total phosphorus content), which has been little studied in relation to niche width, we observed a significant impact on the individual specialization of species in higher trophic positions. Thus, eutrophication can significantly change the foraging behavior. ABSTRACT: Intra-species variability in isotopic niches, specifically isotopic total niche width (ITNW), isotopic individual niche width (IINW), and isotopic individual specialization (IIS), was studied using an innovative approach without sacrificing the vertebrates. Stable isotopes (δ(13)C, δ(15)N) in four body tissues differing in isotopic half-life were analyzed from four freshwater fish species representing different trophic positions. ITNW was widest for the apex predator (European catfish) and narrowest for the obligate predator (Northern pike). IINW exhibited a polynomial trend for the European catfish, Northern pike, and Eurasian perch (mesopredator), decreasing with body mass and increasing again after exceeding a certain species-dependent body mass threshold. Thus, for ectotherms, apex predator status is linked rather to its size than to the species. In herbivores (rudd), IINW increased with body mass. The IIS of predators negatively correlated with site trophic state. Therefore, eutrophication can significantly change the foraging behavior of certain species. We assume that the observed trends will occur in other species at similar trophic positions in either aquatic or terrestrial systems. For confirmation, we recommend conducting a similar study on other species in different habitats.
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spelling pubmed-104525342023-08-26 Trophic Position of the Species and Site Trophic State Affect Diet Niche and Individual Specialization: From Apex Predator to Herbivore Vejřík, Lukáš Vejříková, Ivana Blabolil, Petr Sajdlová, Zuzana Kočvara, Luboš Kolařík, Tomáš Bartoň, Daniel Jůza, Tomáš Šmejkal, Marek Peterka, Jiří Čech, Martin Biology (Basel) Article SIMPLE SUMMARY: Niche widths and individual specialization were studied based on the isotopic signals, but using the innovative and non-lethal approach. We analyzed four different body tissues with different isotopic half-lives, and revealed crucial results on trophic interactions of fish. We assume that the observed trends will occur in other food webs with similar trophic positions. For example, the apex predator status of ectotherms is linked to the individual size, not to the species. In addition, thanks to the consideration of the site trophic state (total phosphorus content), which has been little studied in relation to niche width, we observed a significant impact on the individual specialization of species in higher trophic positions. Thus, eutrophication can significantly change the foraging behavior. ABSTRACT: Intra-species variability in isotopic niches, specifically isotopic total niche width (ITNW), isotopic individual niche width (IINW), and isotopic individual specialization (IIS), was studied using an innovative approach without sacrificing the vertebrates. Stable isotopes (δ(13)C, δ(15)N) in four body tissues differing in isotopic half-life were analyzed from four freshwater fish species representing different trophic positions. ITNW was widest for the apex predator (European catfish) and narrowest for the obligate predator (Northern pike). IINW exhibited a polynomial trend for the European catfish, Northern pike, and Eurasian perch (mesopredator), decreasing with body mass and increasing again after exceeding a certain species-dependent body mass threshold. Thus, for ectotherms, apex predator status is linked rather to its size than to the species. In herbivores (rudd), IINW increased with body mass. The IIS of predators negatively correlated with site trophic state. Therefore, eutrophication can significantly change the foraging behavior of certain species. We assume that the observed trends will occur in other species at similar trophic positions in either aquatic or terrestrial systems. For confirmation, we recommend conducting a similar study on other species in different habitats. MDPI 2023-08-10 /pmc/articles/PMC10452534/ /pubmed/37626997 http://dx.doi.org/10.3390/biology12081113 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Vejřík, Lukáš
Vejříková, Ivana
Blabolil, Petr
Sajdlová, Zuzana
Kočvara, Luboš
Kolařík, Tomáš
Bartoň, Daniel
Jůza, Tomáš
Šmejkal, Marek
Peterka, Jiří
Čech, Martin
Trophic Position of the Species and Site Trophic State Affect Diet Niche and Individual Specialization: From Apex Predator to Herbivore
title Trophic Position of the Species and Site Trophic State Affect Diet Niche and Individual Specialization: From Apex Predator to Herbivore
title_full Trophic Position of the Species and Site Trophic State Affect Diet Niche and Individual Specialization: From Apex Predator to Herbivore
title_fullStr Trophic Position of the Species and Site Trophic State Affect Diet Niche and Individual Specialization: From Apex Predator to Herbivore
title_full_unstemmed Trophic Position of the Species and Site Trophic State Affect Diet Niche and Individual Specialization: From Apex Predator to Herbivore
title_short Trophic Position of the Species and Site Trophic State Affect Diet Niche and Individual Specialization: From Apex Predator to Herbivore
title_sort trophic position of the species and site trophic state affect diet niche and individual specialization: from apex predator to herbivore
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10452534/
https://www.ncbi.nlm.nih.gov/pubmed/37626997
http://dx.doi.org/10.3390/biology12081113
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