Use of Stable Isotopes to Trace Municipal Wastewater Effluents into Food Webs within a Highly Developed River System

2014 ◽  
Vol 31 (9) ◽  
pp. 1093-1100 ◽  
Author(s):  
H. A. Loomer ◽  
K. D. Oakes ◽  
S. L. Schiff ◽  
W. D. Taylor ◽  
M. R. Servos
Keyword(s):  
Stable Isotopes ◽  
Food Webs ◽  
Municipal Wastewater ◽  
River System ◽  
Wastewater Effluents

Cumulative Effects of Multiple Contaminants on Caged Fish

2006 ◽  
Vol 41 (3) ◽  
pp. 244-255 ◽  
Author(s):  
Jack F. Klaverkamp ◽  
Vince P. Palace ◽  
Christopher L. Baron ◽  
Robert E. Evans ◽  
Kerry G. Wautier
Keyword(s):  
Municipal Wastewater ◽  
Cumulative Effects ◽  
Disposal Site ◽  
Garbage Disposal ◽  
Disposal Facility ◽  
Multiple Contaminants ◽  
Wastewater Effluents ◽  
Liver Tissues

Abstract Pearl dace (Semotilus margarita) were held in cages and exposed to mine effluents, municipal wastewater effluents, a combination of the two, or to the combination in addition to runoff from a garbage disposal facility. Fish exposed to mining effluents only had the lowest mean lengths and weights but highest concentrations of As, Ni and Hg and lowest Zn in their viscera. Fish exposed to municipal wastewater effluents only had the highest concentrations of Cd and metallothionein in their viscera. Histopathological analyses of gill and liver tissues revealed a higher incidence of lesions in fish exposed to municipal wastewater effluents. These fish also had the highest LSIs, condition factors and mean vitellogenin concentrations in plasma from males. Fish exposed near the garbage disposal site had the highest concentrations of Pb and Se in their viscera.

scholarly journals Stable isotopes of a terrestrial amphibian illustrate fertilizer-related nitrogen enrichment of food webs in agricultural habitats

2021 ◽  
Vol 319 ◽  
pp. 107553
Author(s):  
Matthias Renoirt ◽  
Frédéric Angelier ◽  
Marion Cheron ◽  
Paco Bustamante ◽  
Yves Cherel ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Food Webs ◽  
Nitrogen Enrichment

scholarly journals ‘Taking Fishers’ Knowledge to the Lab’: An Interdisciplinary Approach to Understand Fish Trophic Relationships in the Brazilian Amazon

2021 ◽  
Vol 9 ◽  
Author(s):  
Paula Evelyn Rubira Pereyra ◽  
Gustavo Hallwass ◽  
Mark Poesch ◽  
Renato Azevedo Matias Silvano
Keyword(s):  
Stable Isotopes ◽  
Food Webs ◽  
Fish Species ◽  
Trophic Interactions ◽  
Brazilian Amazon ◽  
Trophic Levels ◽  
Trophic Relationships ◽  
Ecological Knowledge ◽  
Data Limitations ◽  
Combining Data

Trophic levels can be applied to describe the ecological role of organisms in food webs and assess changes in ecosystems. Stable isotopes analysis can assist in the understanding of trophic interactions and use of food resources by aquatic organisms. The local ecological knowledge (LEK) of fishers can be an alternative to advance understanding about fish trophic interactions and to construct aquatic food webs, especially in regions lacking research capacity. The objectives of this study are: to calculate the trophic levels of six fish species important to fishing by combining data from stable isotopes analysis and fishers’ LEK in two clear water rivers (Tapajós and Tocantins) in the Brazilian Amazon; to compare the trophic levels of these fish between the two methods (stable isotopes analysis and LEK) and the two rivers; and to develop diagrams representing the trophic webs of the main fish prey and predators based on fisher’s LEK. The fish species studied were Pescada (Plagioscion squamosissimus), Tucunaré (Cichla pinima), Piranha (Serrasalmus rhombeus), Aracu (Leporinus fasciatus), Charuto (Hemiodus unimaculatus), and Jaraqui (Semaprochilodus spp.). A total of 98 interviews and 63 samples for stable isotopes analysis were carried out in both rivers. The average fish trophic levels did not differ between the stable isotopes analysis and the LEK in the Tapajós, nor in the Tocantins Rivers. The overall trophic level of the studied fish species obtained through the LEK did not differ from data obtained through the stable isotopes analysis in both rivers, except for the Aracu in the Tapajós River. The main food items consumed by the fish according to fishers’ LEK did agree with fish diets as described in the biological literature. Fishers provided useful information on fish predators and feeding habits of endangered species, such as river dolphin and river otter. Collaboration with fishers through LEK studies can be a viable approach to produce reliable data on fish trophic ecology to improve fisheries management and species conservation in tropical freshwater environments and other regions with data limitations.

Emerging investigators series: prediction of trace organic contaminant abatement with UV/H2O2: development and validation of semi-empirical models for municipal wastewater effluents

2016 ◽  
Vol 2 (3) ◽  
pp. 460-473 ◽  
Author(s):  
Daniel Gerrity ◽  
Yunho Lee ◽  
Sujanie Gamage ◽  
Minju Lee ◽  
Aleksey N. Pisarenko ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Empirical Models ◽  
Organic Contaminant ◽  
Potable Reuse ◽  
Development And Validation ◽  
Semi Empirical ◽  
Trace Organic ◽  
Wastewater Effluents

Recent evaluations of potable reuse treatment trains suggest that the use of UV and UV/H2O2may become increasingly common, particularly in systems employing ozone and/or biofiltration.

Sign in / Sign up

Export Citation Format

Share Document