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
Multidisciplinary Sciences
Jan Grimsrud Davidsen, Xavier Bordeleau, Sindre Havarstein Eldoy, Frederick Whoriskey, Michael Power, Glenn T. Crossin, Colin Buhariwalla, Philippe Gaudin
Summary: The study found that brown trout in the Kerguelen archipelago mainly utilize marine habitats, rarely entering uncolonized watersheds, and have a good nutritional condition, mainly feeding on amphipods and fish. With suitable habitats and rich foraging opportunities, the trout can meet their resource needs close to home, explaining the slowed expansion of brown trout at Kerguelen.
SCIENTIFIC REPORTS
(2021)
Article
Plant Sciences
Angeleen M. Olson, Carolyn Prentice, Zachary L. Monteith, Derek VanMaanen, Francis Juanes, Margot Hessing-Lewis
Summary: In seagrass food webs, the contribution of allochthonous kelp to the diets of mesograzers is important. The biomass of epiphytic macroalgae may be influenced by bottom-up factors or the availability and preference of allochthonous substances.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Ecology
Jonas de Andrade Santos, Rafael Lima Oliveira, Ana Paula Penha Guedes, Alexandre Clistenes de Alcantara Santos, Leonardo Evangelista Moraes
Summary: Tropical sandy beaches have low primary productivity and rely on external food sources, with drifting macrophytes serving as the main source of food for fishes. Small fishes, particularly, consume amphipods as their main prey, and seasonal variations in prey availability can affect fish feeding habits. Drifting macrophytes play a significant role as restaurants for fishes in tropical sandy beaches, influencing their feeding ecology.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Ricardo S. Matias, Hugo R. Guimaro, Paco Bustamante, Jose Seco, Nesho Chipev, Joana Fragao, Silvia Tavares, Filipe R. Ceia, Maria E. Pereira, Andres Barbosa, Jose C. Xavier
Summary: Under the context of climate change, warming Southern Ocean waters may lead to increased bioavailability of mercury (Hg) in the Antarctic marine food web. This study examined the biomagnification of Hg in the food web of the Antarctic Peninsula and found that Hg concentrations increased with trophic levels. These results suggest that trophic interaction is the major pathway for Hg biomagnification in Southern Ocean ecosystems.
ENVIRONMENTAL POLLUTION
(2022)
Article
Ecology
Amandine J. M. Sabadel, Colin D. MacLeod
Summary: Stable isotopes have been used to characterize host-parasite trophic relationships, revealing parasites being N-15 enriched compared to hosts, with their δN-15 values strongly related to feeding behaviors. Broader sample inclusion helped to understand metabolic mechanisms, while carbon stable isotope values and C:N ratios identified lipid requirement of trematode parasites. Parasitic infections should not be ignored as they influence host trophic position significantly, and focusing on specific host and parasite groups reduces variation seen in broader isotope studies.
JOURNAL OF ANIMAL ECOLOGY
(2022)
Article
Environmental Sciences
Jian Zhang, Jilei Xu, Xiang Tan, Quanfa Zhang
Summary: This study examined the stream food webs in the Lhasa River on the Tibetan Plateau and found that anthropogenic activities have negative effects on the structure and function of the food webs, reducing trophic length and redundancy. Additionally, reducing nitrogen inputs is crucial for sustainable river management and biodiversity conservation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Ecology
Anne K. S. Justino, Veronique Lenoble, Latifa Pelage, Guilherme V. B. Ferreira, Rafaela Passarone, Thierry Fredou, Flavia Lucena Fredou
Summary: This study explores the ingestion of microplastics by marine organisms in a tropical estuarine environment, revealing different contamination levels based on feeding strategies. Predators were found to be the most contaminated species, with fibers being the most common type of microplastics ingested. The high contamination levels in the estuarine complex pose potential risks to human health, as the microplastics likely accumulate in sediment and water.
REGIONAL STUDIES IN MARINE SCIENCE
(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
Biodiversity Conservation
Claudia Andrade, Cristobal Rivera, Erik Daza, Eduardo Almonacid, Fernanda Ovando, Flavia Morello, Luis Miguel Pardo
Summary: This study used stomach content and stable isotope analyses to investigate the potential dietary characteristics, isotopic niche, trophic relationships, and ontogenetic diet shift of the southern king crab in the Cape Horn region. The results showed that the giant kelp Macrocystis pyrifera is the basal carbon source for L. santolla, and the species exhibits intraspecific isotopic niche variation. The findings contribute to the conservation of the king crab population and the long-term management of local fisheries.
Article
Biodiversity Conservation
Rien E. van Wijk, Yahkat Barshep, Keith A. Hobson
Summary: After studying the feather isotopic values of two bird communities in Nigeria, it was found that there was significant isotopic overlap among different dietary guilds, with no clear enrichment pattern of H-2 with trophic position.
Article
Ecology
Felipe Caseiro-Silva, Fernando Azevedo Faria, Cindy Tavares Barreto, Cinthia Negrine Fernandez, Leandro Bugoni
Summary: Birds, specifically waterbirds, act as effective carriers of matter and energy between different environments, facilitating nutritional pulses to nutrient-poor areas. This study focused on a swamp forest in southern Brazil, where waterbirds breed and transport nutrients between nutrient-rich environments. Stable isotopes were used to compare soil, plants, invertebrates, and blood samples collected from the breeding colony to a control site without heronries. The results showed spatial, temporal, and vertical effects of nutrient enrichment in the colony environment, with assimilation of estuarine matter observed in all organisms.
Article
Oceanography
Maria Papadimitraki, Kristian Maar, Sigrun Huld Jonasdottir
Summary: Recent studies conducted a meta-analysis of published fatty acid and stable isotope data to determine the diet patterns of meso-/bathypelagic fish species. The results showed a gradient of feeding strategies and interspecific variation in the content of key fatty acid trophic markers, indicating potential variation in prey consumption. This study provides a global perspective on the trophic ecology of meso-/bathypelagic fish and highlights the usefulness of combining fatty acid and stable isotope analyses for large-scale comparisons.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2023)
Article
Entomology
Fujio Hyodo, Hiroshi O. Tanaka
Summary: During primary succession, the ant community modifies its diet preferences and feeding habits, shifting towards plant-based diets in order to balance nutrition. Carbon and nitrogen isotope analyses of ants also support this finding.
ECOLOGICAL ENTOMOLOGY
(2022)
Article
Geochemistry & Geophysics
Danae Guiserix, Emmanuelle Albalat, Henriette Ueckermann, Priyanka Davechand, Linda M. Iaccheri, Grant Bybee, Shaw Badenhorst, Vincent Balter
Summary: Radiogenic strontium isotopes (Sr-87/Sr-86) are a useful tool for investigating migration and landscape use. The study shows that the Sr-88/Sr-86 ratio may reveal unknown dietary and physiological information. Furthermore, the delta Sr-88 values in tooth enamel can differentiate between plants and herbivores, but the distinction between herbivores and carnivores requires further research.
Article
Environmental Sciences
Cecilia Rivera, Eduardo Quiroga, Veronica Meza, Marion Pastene
MARINE POLLUTION BULLETIN
(2019)
Article
Environmental Sciences
M. A. Urbina, G. Luna-Jorquera, M. Thiel, T. Acuna-Ruz, M. A. Amenabar Cristi, C. Andrade, C. Ahrendt, C. Castillo, A. Chevallier, M. Cornejo-D'Ottone, F. Correa-Araneda, C. Duarte, C. Fernandez, C. Galban-Malagon, C. Godoy, M. Gonzalez-Aravena, I. A. Hinojosa, A. Jorquera, T. Kiessling, M. A. Lardies, J. Lenzi, C. Mattar, M. Munizaga, N. Olguin-Campillay, D. J. Perez-Venegas, M. Portflitt-Toro, K. Pozo, J. Pulgar, E. Vargas
Summary: Chile, being a maritime country, is facing the serious threat of marine plastic pollution and has taken some actions to address the issue, including establishing the Scientific Plastic Pollution Alliance of Chile network. Solving the plastic pollution problem requires active involvement and collaboration from all sectors of society.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2021)
Article
Marine & Freshwater Biology
Paula A. Ruiz-Ruiz, Sergio Contreras, Eduardo Quiroga, Angel Urzua
Summary: The Patagonian fjords are high-latitude aquatic ecosystems that are highly sensitive to climate change, and play a key role in the exchange of organic matter and carbon flows between terrestrial and marine environments. This study on the bioenergetic characteristics of three keystone species in these ecosystems found differences in lipid, protein, glucose, and energy content, possibly reflecting physiological characteristics, feeding strategies, and environmental conditions. Marine animals in glacially influenced environments with low temperature and productivity may require high levels of energy storage, such as lipids, for key bioenergetic processes like growth and reproduction.
JOURNAL OF SEA RESEARCH
(2021)
Article
Biodiversity Conservation
Paula A. Ruiz-Ruiz, Sergio Contreras, Angel Urzua, Eduardo Quiroga, Lorena Rebolledo
Summary: This study analyzed the fatty acid compositions of three species in a pristine Patagonian fjord and found that Munida gregaria had the highest concentrations of all fatty acids, suggesting it may be a good quality food source supporting the fjord trophic web in the Southern Hemisphere. The results provide insights into diet compositions and differences among species for fatty acid compositions and proportions, laying the foundation for future modeling of ecosystem responses to food intake in environments characterized by low phytoplankton biomass and high sensitivity to climate variability.
Article
Environmental Sciences
Veronica Molina, Marcela Cornejo-D'Ottone, Eulogio H. Soto, Eduardo Quiroga, Guillermo Alarcon, Daniela Silva, Carla Acuna, Nelson Silva
Summary: This study focuses on the seasonal hydrographic and biogeochemical conditions in the Eastern South Pacific coastal zone during El Nino 2015, with a specific emphasis on the active microbial communities in bottom waters. The results show variations in water column parameters, changes in microbial assemblages, and the influence of oxygen and redox conditions on bacterial communities. Additionally, nitrifying functional groups played a significant role in nutrient recycling and greenhouse gas distribution during late fall and winter.
Article
Environmental Sciences
Carlos Sanchis, Eulogio H. Soto, Eduardo Quiroga
Summary: The study on polychaetes revealed a significant impact of aquaculture activities on seabed biodiversity, with different distribution patterns of polychaete species in different areas. Sites close to fish cages were dominated by deposit-feeding species, while areas further away from the cages and experiencing less impact showed an increase in carnivores and omnivores.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Paula Ortiz, Eduardo Quiroga, Paulina Montero, Madeleine Hamame, Federico Betti
Summary: The study revealed that benthic marine food webs in estuarine Patagonian fjords are influenced by salmon farming activities, with isotopic analysis detecting the effects of food sources and aquaculture waste; high δN-15 values in sponge and encrusting coral may serve as ecological indicators for assessing environmental pollution.
MARINE POLLUTION BULLETIN
(2021)
Article
Biodiversity Conservation
Claudia Andrade, Cristobal Rivera, Erik Daza, Eduardo Almonacid, Fernanda Ovando, Flavia Morello, Luis Miguel Pardo
Summary: This study used stomach content and stable isotope analyses to investigate the potential dietary characteristics, isotopic niche, trophic relationships, and ontogenetic diet shift of the southern king crab in the Cape Horn region. The results showed that the giant kelp Macrocystis pyrifera is the basal carbon source for L. santolla, and the species exhibits intraspecific isotopic niche variation. The findings contribute to the conservation of the king crab population and the long-term management of local fisheries.
Article
Biodiversity Conservation
Luis Miguel Pardo, Claudia Andrade, Lisette Zenteno-Devaud, Bastian Garrido, Cristobal Rivera
Summary: The study investigates the feeding strategy of juvenile southern king crabs, revealing significant differences between cryptic and vagile individuals. Vagile individuals occupy a higher trophic position, suggesting a potential shift in dietary preference and increased cannibalism. No evidence of isotopic niche shift was found, indicating that juveniles of different sizes exploit similar food resources.
Review
Oceanography
Eduardo Quiroga, Paula Ortiz, Eulogio H. Soto, Nicole Salinas, Nicole Olguin, Chester Sands
Summary: The benthic community in the Chilean Patagonia is affected by environmental stressors such as glacier melt and river discharge, which result in changes in its diversity and trophic structure.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Multidisciplinary Sciences
Luis Bedrinana-Romano, Patricia M. Zarate, Rodrigo Hucke-Gaete, Francisco A. Viddi, Susannah J. Buchan, Ilia Cari, Ljubitza Clavijo, Robert Bello, Alexandre N. Zerbini
Summary: This study provides abundance and distribution estimates for several species of whales in the Chilean portion of the Humboldt Current Ecosystem, and identifies areas where efforts should be prioritized to address negative interactions between vessels and cetaceans.
SCIENTIFIC REPORTS
(2022)
Review
Environmental Sciences
Eduardo Rebolledo Monsalve, Eduardo Quiroga
Summary: This article analyzes global production, environmental impacts, and management of farmed Whiteleg shrimp, with a focus on discussing alternative solutions for improving aquaculture management in the context of Ecuador.
MARINE POLLUTION BULLETIN
(2022)
