Article
Environmental Sciences
Daniele A. Miranda, Alison M. Zachritz, Heather D. Whitehead, Shannon R. Cressman, Graham F. Peaslee, Gary A. Lamberti
Summary: In this study, PFAS concentrations in prey and predator fish from Lake Michigan were measured to investigate the occurrence and biomagnification of these compounds. PFOS was the most frequently detected compound, occurring in 98% of individuals. PFAS were found in all fish species measured and commonly biomagnified from prey to predator fish.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Cecilia E. Heuvel, Kenneth G. Drouillard, G. Douglas Haffner, Yingming Zhao, Aaron T. Fisk
Summary: This study found that POP concentrations were similar among different species of freshwater fish in Lake Erie, but varied significantly with ecological characteristics such as age and trophic level within individuals, illustrating the complexity of contaminant dynamics in freshwater fish.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2021)
Article
Fisheries
Antonio Bode, M. Pilar Olivar, Cristina Lopez-Perez, Santiago Hernandez-Leon
Summary: This study utilized stable isotope analysis of amino acids to quantify the contributions of microbial vs. metazoan food webs in Stomiiformes fish species, challenging current understanding of marine food webs and providing a new quantitative tool for their analysis.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Environmental Sciences
Thomas A. Johnston, Gretchen L. Lescord, Michelle Quesnel, Pascale-Laure Savage, John M. Gunn, Karen A. Kidd
Summary: Fish total mercury concentration is influenced by various fish attributes, with ontogenetic factors playing the most significant role. Age and length are important predictors for most species, while growth and food web position also contribute to the variability in mercury concentration. The findings highlight the importance of considering both developmental drivers and growth rate and food web position when assessing the among-individual variation in mercury concentration.
ENVIRONMENTAL RESEARCH
(2022)
Article
Ecology
Jeremy Lobry, Florence Mounier, Marine Ballutaud, Xavier Chevillot, Didier Gascuel, Helene Budzinski, Pierre Labadie, Hilaire Drouineau
Summary: Food-web modelling is a crucial tool for understanding community structure, biodiversity, ecosystem processes, and functioning. This study presents an innovative approach that combines a Bayesian mixing model with classical mass-balance equations to estimate diet composition, isotopic enrichment, contaminant biomagnification, and contaminants and biomass flows in the whole food web.
METHODS IN ECOLOGY AND EVOLUTION
(2022)
Article
Agriculture, Multidisciplinary
Simona Sporta Caputi, Loreto Rossi, Xavier Pons, Giulio Careddu, Edoardo Calizza, Maria Letizia Costantini
Summary: Genetically modified (GM) crops are a good way to improve food and environmental safety by reducing insecticide use. This study explores the impact of GM and non-GM maize residues on the soil food web. The results suggest that non-GM maize residues are more attractive to invertebrate consumers and have an impact on nutrient flows in tritrophic detritus-based food webs.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2022)
Article
Limnology
Cecilia E. Heuvel, Yingming Zhao, Jan J. H. Ciborowski, Li Wang, Emilee Mancini, Aaron T. Fisk
Summary: The use of baselines in stable isotope studies is essential for interpreting food web structure. This study tested this assumption in Lake Erie by quantifying spatial variation in stable isotopes and density of benthic organisms. The results showed distinct spatial trends in stable isotopes, which were not related to population densities.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Environmental Sciences
Stephanie D. Graves, Johanna J. Mason, Jose Luis Rodriguez-Gil, Jonathan Y. Seguin, Jules M. Blais, Mark L. Hanson, Bruce P. Hollebone, Vince P. Palace, Ian Clark, Leah Cundall, Daniel Layton-Matthews, Matthew I. Leybourne, Diane M. Orihel
Summary: Bacteria can biodegrade petroleum hydrocarbons after an oil spill, which could be assimilated by aquatic organisms. A study in a boreal lake in Canada examined the assimilation of petrogenic carbon into a freshwater food web after experimental spills of dilbit. The results showed minimal incorporation of oil carbon into the food web.
Article
Ecology
Rebekah R. R. Stiling, Julian D. D. Olden, Stephanie Bouletreau, Julien Cucherousset, Gordon W. W. Holtgrieve
Summary: In this study, the global investigation of habitat coupling by freshwater fishes between littoral and pelagic zones was conducted. The study explored the variation of coupling according to environmental context and consumer traits. The results show high rates of habitat coupling among fishes globally with taxonomic differences in magnitude and variation. It was found that habitat coupling was higher in lower elevation lakes and colder climates, and associated with locomotion and feeding traits, but independent from species maximum body length. The study emphasizes the importance of multiple resources supporting fish populations and suggests further research on the implications to ecosystem functioning resulting from alterations to habitat coupling by fishes.
Article
Ecology
Yasmin Quintana, Friedrich Wolfgang Keppeler, Kirk O. Winemiller
Summary: Popular armored catfishes from South America have become invasive and can deplete basal resources, potentially impacting native fauna. A study in the Usumacinta River Basin, Guatemala, analyzed stable isotopes in fish tissues and basal resources to assess the trophic ecology of native fishes in the presence of Pterygoplichthys. The study found that the invasive catfish and environmental factors impact the trophic ecology of native fish.
Article
Engineering, Environmental
Zhifeng Huang, Abdul Qadeer, Saisai Zheng, Fangfang Ge, Kexin Zhang, Daqiang Yin, Binghui Zheng, Xingru Zhao
Summary: This study investigated the concentrations of PCB congeners, stable isotope levels, and FAs composition in ten freshwater species of Dongtinghu Lake, China. The results showed that the concentrations of certain PCB congeners increased with trophic levels, while PCB 155 concentrations remained consistent across trophic levels. Furthermore, there were positive correlations between FAs and PCBs, indicating that FAs can serve as efficient bioindicators of PCB pollution in aquatic food webs.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Dhanya Mohan Lal, Giri Bhavan Sreekanth, Chitra Soman, Anupam Sharma, Zeba Jaffer Abidi
Summary: The food and feeding relationships in the Ulhas River Estuary (URE) were analyzed using stable carbon and nitrogen isotopic signatures. The results showed that there were both a phytoplankton-based pelagic food chain and a detritus-based benthic food chain in URE. The ecosystem in URE exhibited a broader food web structure and higher trophic diversity, indicating the influence of anthropogenic activities on nitrogen pollution and trophic disturbance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Civil
Huawu Wu, Qi Huang, Congsheng Fu, Fan Song, Jinzhao Liu, Jing Li
Summary: The interactions between the Yangtze River and Poyang Lake are undergoing rapid changes due to human activities and climate change. The isotopic compositions in river and lake water show temporal heterogeneity across seasons but spatial homogeneity, suggesting the influence of local precipitation, groundwater, and lake hydrology. The study also highlights the importance of precipitation as the main water source for the lake and river, as well as the impact of Three Gorges Dam regulation and water discharge in the complex lake-river interactions.
JOURNAL OF HYDROLOGY
(2021)
Article
Fisheries
Jean-Michel Mortillaro, Lionel Dabbadie, Andoniaina E. Raminoharisoa, Anais Paradis, Philippe Martel, Rija Andriamarolaza, Modestine Raliniaina, Olivier Mikolasek, Joel Aubin
Summary: The trophic dynamics of integrated rice and fish farming systems were studied in irrigated rice plots in Madagascar. The study assessed fish feeding behavior by analyzing stable isotopes of fish and natural feed sources. The results showed that organic fertilization can enhance natural productivity and ecological intensification of rice and fish production.
Article
Environmental Sciences
Thais de Castro Paiva, Eurizangela Pereira Dary, Inacio Abreu Pestana, Sidineia Aparecida Amadio, Olaf Malm, Daniele Kasper
Summary: This study finds that the bioaccumulation of mercury in fishes from an Amazonian lake is influenced by biological characteristics and environmental changes. Feeding habits and seasonal flood-pulse have a significant impact on mercury concentrations in fish muscles.
ENVIRONMENTAL RESEARCH
(2022)