6533b7d7fe1ef96bd126862f

RESEARCH PRODUCT

Beyond the mean: A comparison of trace- and macroelement correlation profiles of two lacustrine populations of the crayfish Procambarus clarkii

Paride PapadiaFrancesco Paolo FanizziGiorgio MancinelliAlessandro LudovisiSalvatrice VizziniDanilo MigoniRoberta Bardelli

subject

Settore BIO/07 - Ecologia0106 biological sciencesEnvironmental EngineeringInter-individual variabilityAstacoidea010501 environmental sciences01 natural sciencesRed swamp crayfishMetals HeavyAnimalsEnvironmental ChemistryWaste Management and DisposalStable isotopes0105 earth and related environmental sciencesTrophic levelProcambarus clarkiiDetritusδ13CbiologyChemistry010604 marine biology & hydrobiologyδ15Nbiology.organism_classificationCrayfishStable isotopePollutionTrace ElementsItalyBenthic zoneIndicator speciesEnvironmental chemistryBiomonitoringBiomonitoring; Elemental fingerprint; Inter-individual variability; Red swamp crayfish; Stable isotopes; Environmental Engineering; Environmental Chemistry; Waste Management and Disposal; PollutionElemental fingerprintWater Pollutants ChemicalEnvironmental Monitoring

description

In invertebrate biomonitors of chemical pollution, emphasis has been generally given to mean accumulation patterns and how they reflect varying environmental levels of contamination. Intra-population variability, and how it relates with individual phenotypic traits, has received less attention. Here, a set of analytes including trace elements (B, Ba, Cd, Cr, Cu, Fe, Li, Mn, Ni, Pb, Sr, V, and Zn), macroelements (C, Ca, K, Mg, N, Na), and carbon and nitrogen stable isotopes (δ13C and δ15N) was measured in two populations of the crayfish Procambarus clarkii from Lake Trasimeno and Lake Bolsena (Central Italy). The influence of location, sex, body size, and condition factor was assessed; in addition, the analyte correlation profiles of the two populations were compared to verify their congruence. In general, significant inter-lake differences were observed in the concentration of both trace- and macroelements in crayfish tissues, generally mirroring the local chemistry of water and of benthic non-living matrices (sediment and plant detritus). Crayfish CN isotopic signatures excluded the occurrence of inter-lake variations in their omnivorous trophic habits. Correlation profiles varied considerably between the two populations in the nature and strength of bivariate relationships. However, Mantel tests and procrustean analyses indicated a general, significant congruence; C, N, and, to a lesser extent K, Li, Ni, Pb, and δ13C showed the highest procrustean residuals, suggesting that their associations with other analytes may be partially influenced by inter-population differences in growing phases. Our study indicates that the local geochemistry of the lacustrine environment influences the elemental fingerprint of Procambarus clarkii; the considerable inter-individual variability in the concentration of analytes, however, does not significantly reflect on their association, thus corroborating its effectiveness as an indicator species.

https://doi.org/10.1016/j.scitotenv.2017.12.106