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
Antonio Bode, Victoria Besada, Begona Perez-Fernandez, Lucia Vinas
Summary: This study identified differences in trophic resource exploitation between geographically adjacent Yellow-legged Gull nesting colonies through the analysis of stable nitrogen isotopes in their eggs. Despite similar trophic positions, gulls in the Cies Islands obtained a substantial portion of lysine from garbage dump sites, while those from the urban colony relied on fish discards. This finding highlights the importance of detailed diet estimations in assessing the conservation status and pollution risks of marine ecosystems.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Oceanography
Sarah C. Weber, Natalie Loick-Wilde, Joseph P. Montoya, Melvin Bach, Hai Doan-Nhu, Ajit Subramaniam, Iris Liskow, Lam Nguyen-Ngoc, Dirk Wodarg, Maren Voss
Summary: The study revealed a shift in the nitrogen source for biological production in mesozooplankton across four different habitats, indicating a change from nitrate in near-coastal waters to diazotroph-N inputs in oceanic waters. This shift was accompanied by an increase in trophic position, suggesting a connection between diazotrophy and the efficiency of nitrogen transfer through the marine food web. The high trophic enrichment value of 5.1 parts per thousand suggested a link between ecosystem heterogeneity and the less efficient transfer of mass and energy across trophic levels.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Review
Multidisciplinary Sciences
Naohiko Ohkouchi
Summary: Food web research is expanding rapidly with the study of natural fractional abundance of 15N in individual amino acids. This paper provides an overview of the principles of this isotope approach and reanalyzes applications, as well as extends the discussion. The method applies kinetic isotope effects to enrich 15N in specific amino acids associated with metabolic processes, which has been demonstrated through observations in natural ecosystems and laboratory experiments. The application of this approach has proven to be successful in unraveling complex food webs and addressing various issues, such as estimating food chain length, assessing nitrogen resources, tracking fish migration, and reconstructing paleodiet.
PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES
(2023)
Article
Environmental Sciences
Zhixin Ke, Ruofei Li, Danting Chen, Chunyu Zhao, Yehui Tan
Summary: This study investigated the spatial and seasonal distributions of stable carbon and nitrogen isotopes in dominant zooplankton groups in Jiaozhou Bay. The results showed that the distributions of these isotopes were influenced by terrigenous organic matter input and phytoplankton biomass, with variations observed in different seasons. The study also found a correlation between small zooplankton stable isotope values and particulate organic matter. The influence of anthropogenic nutrient input on isotopic baseline and trophic levels of zooplankton groups was discussed.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Joao Vitor Fonseca da Silva, Fernando Miranda Lansac-Toha, Bianca Trevizan Segovia, Felipe Emiliano Amadeo, Louizi de Souza Magalhaes Braghin, Luiz Felipe Machado Velho, Hugo Sarmento, Claudia Costa Bonecker
Summary: The increasing amount of plastic particles in continental aquatic environments has caught the attention of researchers worldwide. This study investigates the effects of microplastic particles of different sizes on the planktonic trophic chain and finds that their presence significantly affects the food web, with smaller particles having a higher consumption effect.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
C. Skinner, A. C. Mill, M. D. Fox, S. P. Newman, Y. Zhu, A. Kuhl, N. V. C. Polunin
Summary: Coral reef food webs are heavily subsidized by planktonic production, with offshore pelagic sources playing a significant role in sustaining reef predators. This highlights the importance of allochthonous energetic subsidies throughout the reef ecosystem.
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
Environmental Sciences
Camille de la Vega, Claire Mahaffey, David J. Yurkowski, Louisa Norman, Elysia Simpson, Sophie Smout, Steven H. Ferguson, Rachel M. Jeffreys
Summary: The warming Arctic has caused borealization, leading to changes in food web structure in both high-Arctic and mid-Arctic regions. The rate of this change varies with latitude, with the high-Arctic experiencing a more recent shift compared to the mid-Arctic. This differential response to ecological changes may be due to the timing of borealization in Canadian Arctic.
FRONTIERS IN MARINE SCIENCE
(2021)
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
Multidisciplinary Sciences
June Eggebo, Jasmin Gross, Susan Bengtson Nash
Summary: This study compared the carbon and nitrogen isotopic values of blubber and skin tissues of Southern Hemisphere humpback whales, revealing significant differences between the two tissues. It highlights the need for method validation and standardization in the application of these approaches, advancing the methodological aspects of cetacean dietary analysis. This is of elevated importance in the context of rapidly changing ocean ecosystems.
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
Limnology
Ines G. Viana, Rita Garcia-Seoane, Antonio Bode
Summary: Trophic position estimation is crucial in food web studies. By analyzing published data, it was found that the contribution of microbes to the trophic position of marine consumers decreases as trophic position increases, with the lowest values found in top consumers. Additionally, bacteria and protists play a key role in the estimation of trophic positions of consumers.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Environmental Sciences
Neila Annabi-Trabelsi, Wassim Guermazi, Qusaie Karam, Mohammad Ali, Saif Uddin, Vincent Leignel, Habib Ayadi
Summary: The study found that the concentrations of Cd, Cu, Pb, and Zn in the seawater of Gulf of Gabe`s are significantly higher than in other Mediterranean coastal waters, making it a pollution hotspot. The average metal concentrations show different orders in water and phytoplankton, compared to zooplankton. Additionally, the biomagnification of Zn and Pb is higher in zooplankton, while Cu and Cd are higher in phytoplankton.
MARINE POLLUTION BULLETIN
(2021)
Article
Ecology
S. J. Taipale, C. Rigaud, M. L. Calderini, M. J. Kainz, M. Pilecky, S. Uusi-Heikkila, J. S. Vesamaki, K. Vuorio, M. Tiirola
Summary: This study examines the contribution of mixotrophic organisms and the fate of carbon in the food web using labeled materials. It finds that mixotrophic algae can upgrade simple fatty acids and contribute essential biomolecules to higher trophic levels.
Article
Ecology
Antonio Bode, Camilo Saavedra, Miguel Alvarez-Gonzalez, Marina Arregui, Manuel Arbelo, Antonio Fernandez, Luis Freitas, Monica A. Silva, Rui Prieto, Jose M. N. Azevedo, Joan Gimenez, Graham J. Pierce, M. Begona Santos
Summary: Dolphins play a key role in marine food webs, and can be used as indicators of large-scale changes in the ecosystem. This study assessed the trophic adaptations of dolphin species to recent changes in feeding resource availability using stable isotope ratios. The results showed different impacts of oceanography and food web changes on the trophic ecology of dolphin species.
MARINE ECOLOGY PROGRESS SERIES
(2022)
Article
Biodiversity Conservation
Marcelo E. Oliva, Leyla Cardenas, Isabel M. Valdivia, Paulina Bruning, Luis Figueroa-Fabrega, Ruben Escribano
Summary: The distribution of blood fluke Aporocotyle spp. parasitizing Merluccius species along the coasts of South America was examined to evaluate the geographical range in which a parasite can exploit the same host species. Phylogenetic analyses were conducted using genetic markers to characterize the genetic lineage of Aporocotyle species from South American Hake. The analyses revealed limited genetic variability in Aporocotyle obtained from different hosts and geographical locations, suggesting gene flow between hosts and avoiding speciation in blood flukes from South American hakes.
Article
Geosciences, Multidisciplinary
Carolina E. Gonzalez, Antonio Bode, Igor Fernandez-Urruzola, Pamela Hidalgo, Vera Oerder, Ruben Escribano
Summary: By analyzing the zooplankton in the upwelling zone and offshore waters off central Chile, as well as the oceanographic processes and variables associated with lateral transport, we found that there were differences in the taxonomic and trophic structure of zooplankton between these two areas, but their isotopic signatures showed a large overlap.
JOURNAL OF MARINE SYSTEMS
(2023)
Article
Limnology
Daniele De Corte, Marta M. Varela, Angeles M. Louro, Sarah K. Bercovici, Joaquin Valencia-Vila, Eva Sintes, Federico Baltar, Tamara Rodriguez-Ramos, Meinhard Simon, Antonio Bode, Thorsten Dittmar, Jutta Niggemann
Summary: Zooplankton grazing on phytoplankton promotes the release of organic matter into the water column and is consumed by prokaryotes, contributing to its molecular diversification. In a experiment using zooplankton-derived dissolved organic matter (DOM) as substrate, the prokaryotic community demonstrated exponential growth and transformed the DOM over the incubation period. The results suggest that zooplankton-prokaryotic interactions play a significant role in the ocean's carbon cycle.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Environmental Sciences
R. Garcia-Seoane, I. G. Viana, A. Bode
Summary: This study proposes a method to infer the proportions of vascular and non-vascular primary producers in the diet of consumer organisms using mixing models and compound-specific isotope analysis. The research demonstrates that primary producer groups have distinct isotopic fingerprints that can be tracked into their primary consumers.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Review
Fisheries
A. Bode
Summary: Recent changes in oceanic plankton are occurring at unprecedented rates, primarily driven by environmental factors including climate change. These shifts involve both trends and cycles, as well as system shifts synchronized over large spatial scales. Observational series in the North Atlantic have identified two main periods of significant plankton shifts, with synchronization suggesting responses to warming and large-scale climatic factors. Changes in species abundance and distribution patterns are influenced by hydrographic factors and the nonlinear effects of warming, particularly for species near their thermal limits. These changes are attributed to trade-offs between different biological strategies.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Reinaldo Rivera, Ruben Escribano, Carolina E. E. Gonzalez, Manuela Perez-Aragon
Summary: Predicting species distribution in the ocean is crucial for understanding ecosystem responses to climate change. This study used Bayesian Additive Regression Trees (BART) and Ensembles of Small Models (ESMs) to model and predict the geographic distribution of Calanus chilensis. The results showed that chlorophyll-a, Mixed Layer Depth, and salinity explained the distribution of C. chilensis, and a reduction in its distribution range is projected in the future.
SCIENTIFIC REPORTS
(2023)
Article
Biodiversity Conservation
Naraiana Taborda, Fabiola A. Sepulveda, Jose L. Luque, Ruben Escribano, Marcelo E. Oliva
Summary: This study describes two new species of Encotyllabe from Brazil, previously considered as E. spari. Morphological and molecular analysis were performed to identify the collected monogeneans. The results suggest host specificity for members of Encotyllabe and specimens previously recorded as E. spari need to be revisited.
Article
Oceanography
Luis A. Nacari, Ruben Escribano, Chris Harrod, Marcelo E. Oliva
Summary: Using stable isotope analysis, this study provides the first characterization of the trophic structure of deep-sea fish communities in the Southeastern Pacific Ocean. The results indicate a correlation between carbon assimilation and nitrogen assimilation, as well as a relationship between body length and nitrogen assimilation in demersal fishes. This information enhances our understanding of deep-sea ecosystem functioning and has implications for fisheries management and conservation initiatives.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2023)
Article
Limnology
Ines G. Viana, Rita Garcia-Seoane, Antonio Bode
Summary: Trophic position estimation is crucial in food web studies. By analyzing published data, it was found that the contribution of microbes to the trophic position of marine consumers decreases as trophic position increases, with the lowest values found in top consumers. Additionally, bacteria and protists play a key role in the estimation of trophic positions of consumers.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Review
Oceanography
R. Garcia-Seoane, I. G. Viana, A. Bode
Summary: This study investigated the impact of upwelling intensity on the trophic dynamics of mesozooplankton in a coastal system. The findings suggest that upwelling events lead to increased herbivory and a shorter, more efficient food web structure. The contribution of microbes to the food web was highest at low-moderate upwelling intensities and decreased during downwelling or strong upwelling events.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Geosciences, Multidisciplinary
Zhibo Shao, Yangchun Xu, Hua Wang, Weicheng Luo, Lice Wang, Yuhong Huang, Nona Sheila R. Agawin, Ayaz Ahmed, Mar Benavides, Mikkel Bentzon-Tilia, Ilana Berman-Frank, Hugo Berthelot, Isabelle C. Biegala, Mariana B. Bif, Antonio Bode, Sophie Bonnet, Deborah A. Bronk, Mark V. Brown, Lisa Campbell, Douglas G. Capone, Edward J. Carpenter, Nicolas Cassar, Bonnie X. Chang, Dreux Chappell, Yuh-ling Lee Chen, Matthew J. Church, Francisco M. Cornejo-Castillo, Amalia Maria Sacilotto Detoni, Scott C. Doney, Cecile Dupouy, Marta Estrada, Camila Fernandez, Bieito Fernandez-Castro, Debany Fonseca-Batista, Rachel A. Foster, Ken Furuya, Nicole Garcia, Kanji Goto, Jesus Gago, Mary R. Gradoville, M. Robert Hamersley, Britt A. Henke, Cora Horstmann, Amal Jayakumar, Zhibing Jiang, Shuh-Ji Kao, David M. Karl, Leila R. Kittu, Angela N. Knapp, Sanjeev Kumar, Julie LaRoche, Hongbin Liu, Jiaxing Liu, Caroline Lory, Carolin R. Loscher, Emilio Maranon, Lauren F. Messer, Matthew M. Mills, Wiebke Mohr, Pia H. Moisander, Claire Mahaffey, Robert Moore, Beatriz Mourino-Carballido, Margaret R. Mulholland, Shin-ichiro Nakaoka, Joseph A. Needoba, Eric J. Raes, Eyal Rahav, Teodoro Ramirez-Cardenas, Christian Furbo Reeder, Lasse Riemann, Virginie Riou, Julie C. Robidart, Vedula V. S. S. Sarma, Takuya Sato, Himanshu Saxena, Corday Selden, Justin R. Seymour, Dalin Shi, Takuhei Shiozaki, Arvind Singh, Rachel E. Sipler, Jun Sun, Koji Suzuki, Kazutaka Takahashi, Yehui Tan, Weiyi Tang, Jean-Eric Tremblay, Kendra Turk-Kubo, Zuozhu Wen, Angelicque E. White, Samuel T. Wilson, Takashi Yoshida, Jonathan P. Zehr, Run Zhang, Yao Zhang, Ya-Wei Luo
Summary: This study presents an updated version (version 2) of the global oceanic diazotroph database, which significantly increases the number of in situ diazotrophic measurements and provides more detailed insights into nitrogen fixation in the global ocean. Version 2 yields significantly higher estimates of nitrogen fixation rates compared to version 1, particularly in the South Pacific and North Atlantic regions. Furthermore, additional data sheets for non-cyanobacterial diazotrophs and cell-specific N2 fixation rates have been included in version 2, enhancing the database's comprehensiveness.
EARTH SYSTEM SCIENCE DATA
(2023)