Application of stable isotopes to the bioaccumulation and trophic transfer of arsenic in aquatic organisms around a closed realgar mine

2020 ◽  
Vol 726 ◽  
pp. 138550
Author(s):  
Fen Yang ◽  
Zhenzhen Yu ◽  
Shaowen Xie ◽  
Hanxiao Feng ◽  
Chaoyang Wei ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Aquatic Organisms ◽  
Trophic Transfer

scholarly journals Trace elements and stable isotopes in penguin chicks and eggs: A baseline for monitoring the Ross Sea MPA and trophic transfer studies

2021 ◽  
Vol 170 ◽  
pp. 112667
Author(s):  
Edoardo Calizza ◽  
Geraldina Signa ◽  
Loreto Rossi ◽  
Salvatrice Vizzini ◽  
Giulio Careddu ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Trace Elements ◽  
Ross Sea ◽  
Trophic Transfer

scholarly journals Mixing models and stable isotopes as tools for research on feeding aquatic organisms

2018 ◽  
Vol 48 (7) ◽  
Author(s):  
Cyntia Rafaela Ferreira de Moraes ◽  
Gustavo Gonzaga Henry-Silva
Keyword(s):  
Stable Isotopes ◽  
Trophic Ecology ◽  
Accurate Determination ◽  
Aquatic Organisms ◽  
Isotopic Analysis ◽  
Trophic Relationships ◽  
Mixing Models ◽  
Relative Contribution ◽  
Promising Tool ◽  
Isotope Technique

ABSTRACT: Implementation of mixture models in isotopic analysis has been increasing due to the need to analyze sources and understand their variations in relation to consumers, which requires an accurate determination of their discriminant rate and fractioning. In this context, we presented the main concepts related to the application of stable isotopes and mixing models, with the aim to analyze the benefits and problems of these tools in surveys on nutrition of aquatic organisms. The predominant methods identified included application of the models IsoSource, MixSIR, SIBER and SIAR, with the use of C and N isotopes in research with aquatic organisms. Studies in both freshwater and marine environments were evaluated to determine the relative contribution of the main food items and understand trophic relationships between organisms. It can be concluded that the application of mixing models, with the stable isotope technique, is a promising tool for research on feeding aquatic organisms and understanding issues related to trophic ecology of these organisms.

scholarly journals Efficacy of Trophic Transfer of Radioactive and Stable Isotopes of Metals to Zoobenthos-Feeding Fish of the Yenisei River

2013 ◽  
Vol 6 (1) ◽  
pp. 96-107
Author(s):  
Zotina Tatiana A. ◽  
◽  
Trofimova Elena A. ◽  
Bolsunovsky Alexandr Ya. ◽  
Anishenko Olesia V. ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Trophic Transfer ◽  
Yenisei River ◽  
The Yenisei River

Trophic transfer and dietary exposure risk of mercury in aquatic organisms from urbanized coastal ecosystems

Chemosphere ◽  
2021 ◽  
pp. 130836
Author(s):  
Lulu Mao ◽  
Xitao Liu ◽  
Zongxing Wang ◽  
Baodong Wang ◽  
Chunye Lin ◽  
...  
Keyword(s):  
Dietary Exposure ◽  
Aquatic Organisms ◽  
Trophic Transfer ◽  
Coastal Ecosystems ◽  
Exposure Risk

scholarly journals The trophic transfer of Cd and Pb from navicula pelliculosa (Bacillariophyta) to Hyalella azteca (Amphipoda)

2021 ◽  
Author(s):  
Jennifer L Stewart
Keyword(s):  
Protein A ◽  
Aquatic Organisms ◽  
Hyalella Azteca ◽  
Trophic Transfer ◽  
Noticeable Effect ◽  
Water Exposure ◽  
Freshwater Organisms ◽  
Organic Debris ◽  
Significant Difference ◽  
Navicula Pelliculosa

Currently, information identifying the importance of food and water in the trophic transfer of metals for most aquatic organisms is limited, yet such information is essential for modeling metal movement within food webs. Hyalella azteca is a suitable organism to study the trophic transfer of metals since they represent a major, but potentially vulnerable component of the food web of many lakes. Since studies involving the trophic transfer are limited, the objective of this research was to determine the relative importance of food and water sources of Pb and Cd to these animals. Hyalella azteca browses on the film of microscopic plants, animals and organic debris covering leaves, stems and other substrates. Hyalella azteca are epibenthic freshwater organisms that prefer foods high in protein. A major challenge of this study involved determining a substrate in which algae would grow and stay attached so Hyalella azteca could graze. Preliminary studies found that the diatom species, Navicula pelliculosa grew and adhered well to Teflon ® surfaces and that Hyalella azteca grazed the diatoms from the surface of Teflon ® . Thus, Navicula pelliculosa was grown in the presence of Pb and Cd concentrations and then fed to the organisms. No significant difference was found between organisms exposed to Pb and Cd from water and from water and food, indicating that Pb and Cd bioaccumulation from food is negligible when the dissolved inorganic fractions are buffered with ethylenediamine tetra-acetic acid (EDTA). The average log 10 bioconcentration factor (BCF) for Cd was calculated to be 5.25 from water exposure and 5.49 from water and food exposure. The log 10 Hyalella BCF for Pb was calculated as 4.62 from water exposure and 4.59 from water and food exposure. From these results, it can be concluded that a food source containing Pb and Cd concentrations of 15 nM Pb and 0.37 nM Cd, had no noticeable effect on metal burdens to Hyalella azteca. Metal uptake by Hyalella azteca at the levels studied was found to be primarily from the dissolved phase.

scholarly journals ISÓTOPOS ESTÁVEIS E OUTRAS FERRAMENTAS EM ESTUDOS TRÓFICOS DE PEIXES EM RIACHOS TROPICAIS

2021 ◽  
Vol 25 (02) ◽  
pp. 283-300
Author(s):  
Míriam Pilz Albrecht ◽  
◽  
Andressa da Silva Reis ◽  
Vinicius Neres-Lima ◽  
Eugenia Zandonà ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Environmental Changes ◽  
Trophic Position ◽  
Isotope Analysis ◽  
Aquatic Organisms ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Tropical Streams ◽  
Stream Fish ◽  
The Impact

Stable isotope analysis (SIA) has become an essential tool in Ecology, being increasingly used in studies of fish in tropical streams. The SIA allows to reconstruct the animals' diet and its intraspecific variation, to trace the contributions of the main basal resources throughout the food web, to calculate trophic position and trophic niche, including niche overlap and its alterations, and to build food webs. The SIA is also used to understand the impact of environmental changes on fish communities and other aquatic organisms. The number of such studies is increasing in Brazil, but there are still several gaps. In this study, we present the basic concepts on stable isotopes analysis in trophic studies of stream fish - especially those of carbon, nitrogen and hydrogen - their premises, uses and limitations, presenting examples from tropical streams. We also explore new conceptual tools in this area, still not used for stream fish in Brazil, such as fatty acids, stable isotopes in specific compounds, nutritional geometry and ecological stoichiometry concepts such as the Threshold Elemental Ratio.

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