Article
Geosciences, Multidisciplinary
Zhimian Cao, Xinting Rao, Yang Yu, Christopher Siebert, Ed C. Hathorne, Bo Liu, Guizhi Wang, Ergang Lian, Zhibing Wang, Ruifeng Zhang, Lei Gao, Gangjian Wei, Shouye Yang, Minhan Dai, Martin Frank
Summary: The study reveals significant barium isotope fractionation at near-zero salinities in the Yangtze and Pearl River Estuary, with conservative mixing dominating delta Ba-138(DBa) distributions beyond low salinities. This provides a modern calibration for using barium isotopes as a proxy for paleosalinity and river water inputs into the ocean.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Marine & Freshwater Biology
Bianca Possamai, David J. Hoeinghaus, Alexandre M. Garcia
Summary: Biological communities in estuarine ecosystems are influenced by environmental factors such as salinity, rainfall, and river flow, with the El Nino phenomenon impacting species composition and diversity patterns globally. Food-chain length (FCL) is an important attribute in community ecology, with estuarine FCL showing resilience to environmental variability and climatic perturbations. In a shallow-water estuarine community, El Nino events were found to increase species and trophic guild richness, while FCL varied but did not follow the predicted trend during periods of higher rainfall.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Marine & Freshwater Biology
Maria C. Castellanos-Jimenez, Carlos J. Polo-Silva, Adolfo Sanjuan-Munoz, Antonio Delgado-Huertas
Summary: The study revealed ontogenetic shifts in habitat use and consumption of prey in triggerfish, with isotopic data indicating a possible change in food sources from pelagic to benthic zones as they grow. Trophic level increased with size, as confirmed by isotopic niche width related to maturity groups.
JOURNAL OF SEA RESEARCH
(2021)
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
Behavioral Sciences
Krista Nicholson, Lars Bejder, Neil Loneragan
Summary: This study revealed resource partitioning within a resident estuarine dolphin population based on social structure. The heterogeneity in space use and diet among social clusters may lead to individuals facing different pressures and threats. Dolphins were identified as apex predators in the Peel-Harvey Estuary ecosystem, exerting significant influence on prey populations and ecosystem dynamics.
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY
(2021)
Article
Environmental Sciences
Tae Hee Park, Chung Il Lee, Tae-Hoon Kim, Dongyoung Kim, Hyun Je Park
Summary: In order to evaluate the impact of rainfall on the basal resources supporting food webs, we compared stable isotope ratios (813C and 815N) of fish consumers and organic matter sources between up- and down-sites in an estuary across different seasons and years. Our study found seasonal differences in the isotopic values of basal resources and fish consumers in both years. Changes in rainfall period resulted in significant differences in the isotopic values of fish consumers at the up-site, indicating a shift in food availability. However, the isotopic values of fishes remained consistent at the down-site, suggesting a negligible impact of rainfall on fish resources.
MARINE POLLUTION BULLETIN
(2023)
Article
Ecology
Carla Carpena-Catoira, Christian D. Ortega-Ortiz, Marco A. Linan-Cabello, Aramis Olivos-Ortiz, Fernando R. Elorriaga-Verplancken
Summary: This study investigated the foraging aspects of olive ridley sea turtles in the Mexican Central Pacific using stable isotopes of carbon and nitrogen. The results showed a wider isotopic niche width in adult turtles compared to subadults and an expanded feeding range during the rainy season. The study highlights the ecological importance of the MCP region for olive ridley sea turtles and emphasizes the need for conservation efforts.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Natalia Velez, Sandra Bessudo, Dalia C. Barragan-Barrera, Felipe Ladino, Paco Bustamante, Andrea Luna-Acosta
Summary: This study found that some shark muscle samples in Colombia contained total mercury concentrations exceeding international recommended limits, especially for Pelagic Thresher and Scalloped Hammerhead. Stable isotopes analysis showed foraging overlap in coastal habitats, increasing the risk of overfishing. The study provides useful scientific information for developing shark management plans in Colombia and neighboring countries.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Fernanda Vianna-Gatts, Gleici Montanini, Alexandre F. Azevedo, Jose Lailson-Brito, Tatiana L. Bisi
Summary: This study compared and analyzed the stable isotope variations among the liver, muscle, and skin of Guiana dolphins. The findings suggest that skin and muscle may have equivalent values in 613C for Guiana dolphins.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Ecology
Paco Bustamante, Thibault Le Verge, Charles-Andre Bost, Maud Brault-Favrou, Matthieu Le Corre, Henri Weimerskirch, Yves Cherel
Summary: This study aims to determine the contamination of Mercury (Hg) in the seabird community nesting on Clipperton Island. It found that Great Frigatebirds had the highest Hg concentrations, while Brown Noddies and Sooty Terns had the lowest.
Article
Plant Sciences
Rachel D. Wigginton, Chloe Van Grootheest, Hildie Spautz, J. Letitia Grenier, Christine R. Whitcraft
Summary: This study used stable isotope tools and modeling to demonstrate two mechanisms of isotopic influence by L. latifolium on omnivorous song sparrows. This study can inform site- and species-specific management strategies by demonstrating how changes to the plant community can impact entire trophic systems.
APPLICATIONS IN PLANT SCIENCES
(2022)
Article
Fisheries
Jiaqi Zhang, Bilin Liu, Song Hu, Xinjun Chen, Xinhao Zhang
Summary: The study examined the trophic ecology and spatial ecology of the neon flying squid in the North Pacific Ocean. The results showed that the diet and trophic level of the squid changed with ontogenetic growth. The trophic niche breadth increased from the paralarval to the juvenile stage and decreased from the juvenile to the subadult-adult stage. Interactions between different ecosystems led to a greater diversity of food sources for the squid.
Article
Soil Science
Mark Maraun, Tanja Thomas, Elisabeth Fast, Nico Treibert, Tancredi Caruso, Ina Schaefer, Jing-Zhong Lu, Stefan Scheu
Summary: Knowledge of the trophic ecology of soil animals is important for understanding their diversity and functional role in soil food webs. Stable isotope analysis has revolutionized the study of trophic ecology, providing insights into the feeding habits and niche differentiation of oribatid mites. These mites can be classified into six trophic groups, with some species showing trophic plasticity. However, stable isotope analysis has limitations, and other methods such as fatty acid and gut content analyses can complement the study of oribatid mite trophic ecology.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Environmental Sciences
Caroline Graham, Evgeny A. Pakhomov, Brian P. V. Hunt
Summary: The study examined spatial patterns in diet, trophic niche width, and niche overlap of chum, pink, and sockeye salmon across the North Pacific. Different species showed variations in diet preference in different regions, with higher niche width and overlap in areas of high prey availability. Chum salmon demonstrated greater diet specialization compared to other species, especially in areas with abundant prey.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Lucien Besnard, Gael Le Croizier, Felipe Galvan-Magana, David Point, Edouard Kraffe, James Ketchum, Raul Octavio Martinez Rincon, Gauthier Schaal
Summary: The decline of shark populations in the world ocean has unpredictable effects on ecosystem structure and function, necessitating new ecological information for a better understanding of the role of sharks in their habitats. Research has found that many shark species primarily forage in the mesopelagic area, but the extent to which different pelagic sharks rely on this habitat has been overlooked. By using mercury stable isotopes in the muscle of pelagic sharks, it is possible to reveal their food partitioning and the relationship between foraging depth and resource competition.
ENVIRONMENTAL POLLUTION
(2021)