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Fish scale stable isotopes as potential indicators of nutrient pollution: Exploring the response of roachi (Rutilus/ii rutilus)/i scale d15N and d13C to a gradient of land use disturbance
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SYSNO ASEP 0583809 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fish scale stable isotopes as potential indicators of nutrient pollution: Exploring the response of roachi (Rutilus/ii rutilus)/i scale d15N and d13C to a gradient of land use disturbance Author(s) Vašek, Mojmír (BC-A) RID, ORCID
Brabec, Marek (UIVT-O) RID, SAI, ORCID
Blabolil, Petr (BC-A) RID, ORCID
Čech, Martin (BC-A) RID, ORCID
Draštík, Vladislav (BC-A) RID, ORCID
Jůza, Tomáš (BC-A) RID, ORCID
Kubečka, Jan (BC-A) RID, ORCID
Muška, Milan (BC-A) RID, ORCID
Peterka, Jiří (BC-A) RID, ORCID
Prchalová, Marie (BC-A) RID, ORCID
Říha, Milan (BC-A) RID, ORCID
Hejzlar, Josef (BC-A) RID, ORCIDNumber of authors 12 Article number 161198 Source Title Science of the Total Environment. - : Elsevier - ISSN 0048-9697
Roč. 865, Dec (2023)Number of pages 9 s. Language eng - English Country NL - Netherlands Keywords pelagic food webs ; ecological status ; whitefish scales ; trophic position ; delta-n-15 ; delta-c-13 Subject RIV EH - Ecology, Behaviour OECD category Biodiversity conservation Subject RIV - cooperation Institute of Computer Science - Applied Statistics, Operational Research R&D Projects GA20-18005S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support BC-A - RVO:60077344 ; UIVT-O - RVO:67985807 UT WOS 000917892100001 EID SCOPUS 85145349876 DOI 10.1016/j.scitotenv.2022.161198 Annotation To examine the suitability of fish scales as potential tracers of nutrient pollution, we analysed the nitrogen and carbon sta-ble isotope values (d15N and d13C) 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 d15N 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 d13C values differed by d%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 d13C values may explain the lack of relationships between roach scale d13C values and the explanatory variables. In summary, our findings show that fish scale d15N values are sensitive bioindicators of catchment-derived anthropogenic nitrogen inputs to freshwater ecosystems. Because scales can be sampled in a nonlethal way and d15N analysis is relatively inexpensive, we suggest that measuring the d15N values of fish scales could be an effective method for monitoring nitrogen pollution in aquatic environments. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2024 Electronic address https://doi.org/10.1016/j.scitotenv.2022.161198
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