Fish scale stable isotopes as potential indicators of nutrient pollution: Exploring the response of roach (Rutilus rutilus) scale 815N and 813C to a gradient of land use disturbance

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F23%3A43906487" target="_blank" >RIV/60076658:12310/23:43906487 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0048969722083024?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0048969722083024?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.scitotenv.2022.161198" target="_blank" >10.1016/j.scitotenv.2022.161198</a>

Result language

angličtina

Original language name

Fish scale stable isotopes as potential indicators of nutrient pollution: Exploring the response of roach (Rutilus rutilus) scale 815N and 813C to a gradient of land use disturbance

Original language description

To examine the suitability of fish scales as potential tracers of nutrient pollution, we analysed the nitrogen and carbon sta-ble isotope values (815N and 813C) in scales of a generalist fish species, roach Rutilus rutilus, collected from 22 Czech res-ervoirs covering wide gradients of catchment land use and nutrient enrichment. Using generalised additive mixed models in the first step and generalised linear mixed models in the second step, we evaluated the response of roach scale stable isotope values to catchment land use variables (percentage of agricultural land and human population density) and in-reservoir water quality variables. Roach scale 815N values varied by 15 %o among the reservoirs and were strongly, line-arly, and positively associated with the percentage of agricultural land in the reservoir catchments, pointing to agriculture as the dominant source of nitrogen pollution in the investigated systems. Roach scale 813C values differed by 8 %o among the studied reservoirs and were not related to catchment land use variables or in-reservoir primary production (chloro-phyll-a levels). Possible variation in roach foraging strategies (littoral versus pelagic) between reservoirs or the contrasting effects of eutrophication-related autotrophic and heterotrophic processes on baseline 813C values may explain the lack of relationships between roach scale 813C values and the explanatory variables. In summary, our findings show that fish scale 815N values are sensitive bioindicators of catchment-derived anthropogenic nitrogen inputs to freshwater ecosystems. Be -cause scales can be sampled in a nonlethal way and 815N analysis is relatively inexpensive, we suggest that measuring the 815N values of fish scales could be an effective method for monitoring nitrogen pollution in aquatic environments.

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

Science of the Total Environment

ISSN

0048-9697

e-ISSN

1879-1026

Volume of the periodical

865

Issue of the periodical within the volume

MAR 20 2023

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

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UT code for WoS article

000917892100001

EID of the result in the Scopus database

2-s2.0-85145349876