Article
Chemistry, Applied
Wei Xia, Xiangjun Fang, Yuan Gao, Weijie Wu, Yanchao Han, Ruiling Liu, Hailong Yang, Hangjun Chen, Haiyan Gao
Summary: Food quality, safety, and nutrient metabolism play a key role in human health. However, contaminants and metabolic dysregulation in food can be problematic. Chromatography-mass spectrometry technology, especially when combined with stable isotopes, is widely used in food analysis and nutrient metabolism research. This study provides an overview of stable isotope technology applications in quantifying contaminant residues and nutrient metabolism, aiming to contribute to effective analysis techniques for protecting food quality and human health.
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
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
Zoology
G. -c. Hsu
Summary: An experimental framework combining controlled feeding trials and stable isotope analysis is proposed to quantify the degree of intraguild predation (IGP) in an omnivorous food web in the field. The degree of IGP is defined as the proportion of mesopredators consumed in the total diet of top predators. The framework leverages different experimental approaches to provide a practical tool for accurately and realistically quantifying IGP.
JOURNAL OF ZOOLOGY
(2023)
Article
Ecology
Anthony Sturbois, Julien Cucherousset, Miquel De Caceres, Nicolas Desroy, Pascal Riera, Alexandre Carpentier, Nolwenn Quillien, Jacques Grall, Boris Espinasse, Yves Cherel, Gauthier Schaal
Summary: Ecologists working with stable isotopes face challenges in analyzing and representing complex datasets with temporal and spatial replication. A lack of commonly accepted conceptual framework in stable isotope ecology has hindered quantitative detection of functional patterns. The community trajectory analysis (CTA) framework provides more explicit perspectives for ecological trajectories. Building on CTA, the Stable Isotope Trajectory Analysis (SITA) framework allows quantitative analysis of stable isotope spatial and temporal dynamics and offers new graphical representation solutions.
ECOLOGICAL MONOGRAPHS
(2022)
Article
Microbiology
Diwen Liang, Hailin Luo, Chunrong Huang, Zhen Ye, Shuangshuang Sun, Jiahua Dong, Mingyi Liang, Senjie Lin, Yufeng Yang
Summary: Knowledge of the diet composition of widespread rotifers is crucial for understanding their trophic position and adaptability to environmental changes. In this study, the authors used high-throughput sequencing to investigate the diet composition of Polyarthra in a subtropical lake. They found that Polyarthra mainly grazed on Chlorophyta, but had a preference for Chrysophyceae and Synurophyceae. The results also showed that nutrient concentration and environmental factors influenced the feeding strategy and eukaryotic community variation in Polyarthra.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Marine & Freshwater Biology
Yeon Jee Suh, Min-Seob Kim, Won-Kyung Lee, Hyunjin Yoon, Inkyeong Moon, Jaewoo Jung, Se-Jong Ju
Summary: This study investigated energy sources and trophic interactions among vent fauna in deep-sea hydrothermal vents in the North Fiji Basin. The findings indicate that symbiont-bearing taxa have different carbon fixation pathways or nutrient preferences. Niche partitioning was observed among omnivores, with different resources or microhabitats being utilized. The crab was found to be the top predator in the ecosystem, consuming a variety of prey but with a lower preference for mussels. Overall, the vent fauna displayed non-overlapping diets and spatial niches, with each taxon having unique energy sources.
Review
Ecology
MacKenzie K. Kjeldgaard, Jeremy A. Hewlett, Micky D. Eubanks
Summary: Stable isotope analysis is widely used to estimate trophic position and provide insight into ecological communities, but the variation in baselines and methodologies may lead to biased or erroneous conclusions. It is recommended to combine stable isotope analysis with other techniques, increase sample size, and use specific methods to enhance the robustness and accuracy of conclusions based on stable isotopes.
ECOLOGICAL MONOGRAPHS
(2021)
Article
Ecology
Philip J. Manlick, Seth D. Newsome
Summary: Animals consume resources through multiple energy channels, connecting food webs and driving trophic structure. Stable isotope 'fingerprints' can trace energy flow in wild systems. This study shows that ΔC-13 fingerprints accurately measure energy flow to vertebrate consumers and can estimate multichannel feeding at various temporal scales.
METHODS IN ECOLOGY AND EVOLUTION
(2022)
Article
Environmental Sciences
Jie Feng, Xiaolong Zhao, Fan Bi, Wei Zhao, Liang Zhao, Hao Song, Meijie Yang, Zhi Hu, Cong Zhou, Pu Shi, Pengpeng Hu, Peizhen Ma, Pengfei Sun, Han Jiang, Jiangling Xu, Tao Zhang
Summary: This study used stable isotope analysis to investigate the food web structure and functions of an artificial reef (AR) ecosystem. The results showed that the δ13C and δ15N values of the particulate organic matter (POM) in the AR exhibited noticeable seasonal changes, with higher δ13C values in autumn. Phytoplankton was identified as the primary nutrient source in the AR ecosystem. Invertebrates had trophic levels between 2.00 and 3.09, while fish had trophic levels between 2.98 and 3.66. Bivalve shellfish and zooplankton were found to be important food sources for fish in the AR ecosystem.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Rossana Caroni, Roberta Piscia, Gary Free, Marina Manca
Summary: The purpose of this study was to investigate the seasonal and interannual variations in carbon and nitrogen stable isotopes in the zooplankton crustacean community of Lake Maggiore in Italy. Different taxa and groups of zooplankton showed distinct carbon isotopic signatures, providing insights into their food sources and niche partitioning. The study found that water temperature and chlorophyll a were positively correlated with the carbon isotopic signatures of the zooplankton community. Moreover, the changing environmental parameters matched the trends in carbon isotopic signatures of certain zooplankton taxa. These results suggest that climate warming affects the availability of food sources and environmental conditions in Lake Maggiore, thereby influencing the isotopic signatures of zooplankton.
Article
Agriculture, Multidisciplinary
Dongxue Xu, Ji Liu, Yuanxue Gu, Yanru Chen, Chunyan Zhao, Guohua Sun, Yichao Ren, Chao Li, Bin Xia
Summary: Juvenile sea cucumbers were fed different microalgae in a 130-day experiment, leading to varying growth rates and amino acid compositions. Analysis of carbon isotopes showed fluctuations in specific amino acids. The study sheds light on the metabolism routing and nutrient utilization in sea cucumbers during their juvenile stage.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
Article
Environmental Sciences
Moon Jung Kim, Hee Young Yun, Kyung-Hoon Shin, Jeong Ha Kim
Summary: Understanding the trophic structure of kelp forests is crucial for their restoration and management. This study investigated the trophic structure and functional recovery of a restored kelp bed in Korea. The results showed that the restored bed reached the biomass and diversity levels of a natural bed within one year. The trophic structure of the restored bed exhibited a transient over-shooting state before moving towards the natural bed in the second year. The removal of sea urchins resulted in increased recruitment of macroalgae and consumer groups, enhancing the diversity and trophic structure of the restored bed.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Julia Blaurock, Birgit Kaiser, Tamara Stelzl, Michelle Weech, Rosalind Fallaize, Rodrigo Zenun Franco, Faustina Hwang, Julie Lovegrove, Paul M. Finglas, Kurt Gedrich
Summary: In a study in Germany, vegetarian diets were found to have lower intake of certain nutrients such as fat and cholesterol compared to omnivorous diets, while higher intake of fiber, magnesium, and beta-carotene. The HEI-2015 scores indicated that the nutritional quality of vegetarian diets was higher than that of omnivorous diets.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Review
Oceanography
Toru Kobari, Maharu Shinyashiki, Kanako Saito, Gen Kume, Mutsuo Ichinomiya, Tomohiro Komorita, Hiroomi Miyamoto, Yuji Okazaki, Fumihiro Makino, Ryuji Fukuda, Fujio Hyodo, Maki Noguchi-Aita
Summary: This study investigated the trophic sources and pathways of mesozooplankton and fish larvae in the East China Sea. The results showed that the main trophic sources for these organisms were copepods and appendicularians, and their dependence on diazotrophic production was greater in pelagic waters.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Environmental Sciences
T. Masset, V. Frossard, M. E. Perga, N. Cottin, C. Piot, S. Cachera, E. Naffrechoux
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Editorial Material
Ecology
M. E. Perga, M. Syarki, N. Kalinkina, D. Bouffard
Article
Environmental Sciences
Yann Guenand, Marie-Elodie Perga, Vincent Chanudet, Damien Bouffard
Article
Ecology
Marie-Elodie Perga, Maria Syarki, Jorge E. Spangenberg, Victor Frossard, Emilie Lyautey, Natalia Kalinkina, Damien Bouffard
Summary: Zooplankton can spend winter actively under lake ice, with only a fraction contributing to an active food web due to limited and unrewarding feeding opportunities. Zooplankton fatty acids under ice mostly come from previously accumulated fat storage, with little contribution from under-ice seston assimilation. The food web under lake ice is supported by mixotrophic phytoplankton, resulting in few trophic linkages and low connectance in the planktonic community.
FRESHWATER BIOLOGY
(2021)
Article
Environmental Sciences
Rosalie Bruel, Stephanie Girardclos, Aldo Marchetto, Katrina Kremer, Christian Crouzet, Jean-Louis Reyss, Pierre Sabatier, Marie-Elodie Perga
Summary: Research shows that the plankton community of Lake Geneva experienced a significant shift over the past 1500 years, from relative stability in the past to a series of changes in modern times. Eutrophication acted as a key driving factor that made the lake more vulnerable to the impacts of climate change.
JOURNAL OF PALEOLIMNOLOGY
(2021)
Article
Environmental Sciences
Alfred Wuest, Damien Bouffard, Jean Guillard, Bastiaan W. Ibelings, Sebastien Lavanchy, Marie-Elodie Perga, Natacha Pasche
Summary: The open water platform on Lake Geneva offers a new approach for studying ecological processes in lakes, providing continuous access and a wide range of analytical capabilities. It supports multidisciplinary empirical research in limnology, atmospheric sciences, and remote sensing, and has already attracted a large number of projects due to its efficacy and necessity.
WILEY INTERDISCIPLINARY REVIEWS-WATER
(2021)
Article
Environmental Sciences
Nicolas Escoffier, Pascal Perolo, Thibault Lambert, Janine Ruegg, Daniel Odermatt, Thierry Adatte, Torsten Vennemann, Marie-Elodie Perga
Summary: This study investigated the mechanisms underlying a whiting event during the early summer of 2019 in Lake Geneva. The event started during a snowmelt period in the catchment at the Rhone River delta before spreading along the lake's northern shore and covering vast areas of its deeper basin. The development of the event depended upon the thermal stratification of the water column and the existence of a physically stable metalimnion.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Environmental Sciences
Gael Many, Nicolas Escoffier, Michele Ferrari, Philippe Jacquet, Daniel Odermatt, Gregoire Mariethoz, Pascal Perolo, Marie-Elodie Perga
Summary: This study uses remote sensing technology to analyze whiting events in Lake Geneva and finds that these events mainly occur in the northeastern part of the lake with highly reproducible environmental conditions. The inter-annual changes of whiting occurrences are significantly related to the Western Mediterranean and Atlantic oscillation indices.
Article
Environmental Sciences
Marie-Elodie Perga, Oriane Sarrasin, Julia Steinberger, Stuart N. Lane, Fabrizio Butera
Summary: By raising awareness of climate change, media coverage provides an opportunity for research to engage individuals and collectives in climate actions. However, the research highlighted by the media tends to be limited and focuses mainly on natural science and health aspects of climate change. This selective media coverage fails to promote real societal engagement and actions towards climate change.
GLOBAL ENVIRONMENTAL CHANGE-HUMAN AND POLICY DIMENSIONS
(2023)
Article
Limnology
Marie-Elodie Perga, Camille Minaudo, Tomy Doda, Florent Arthaud, Harsh Beria, Hannah E. Chmiel, Nicolas Escoffier, Thibault Lambert, Raphaelle Napolleoni, Biel Obrador, Pascal Perolo, Janine Ruegg, Hugo Ulloa, Damien Bouffard
Summary: By studying high-temporal resolution time series of dissolved oxygen concentration and temperature in 14 mountain lakes, it was found that the duration of bottom hypoxia under ice varies greatly among lakes and years. The variability of hypoxia duration is primarily explained by changes in the decay rate of dissolved oxygen above the lake bottom, which is linked to physical controls such as deep-water warming. The study also showed that the summer light climate is a key driver of the dissolved oxygen decay rate and hypoxia duration under the ice.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Environmental Sciences
Nicolas Escoffler, Pascal Perolo, Gael Many, Natacha Tofleld Pasche, Marie-Elodie Perga
Summary: In hardwater lakes, calcite precipitation plays an important role in the lacustrine carbon cycle, but its dynamics and factors are still poorly understood. This study analyzed high-frequency data from Lake Geneva and found that calcite precipitation occurred during warm stratified periods when surface water CO2 concentrations were below atmospheric equilibrium. The study also revealed the daily variability and relationship between calcite precipitation and autotrophic metabolism.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Limnology
Pascal Perolo, Nicolas Escoffier, Hannah E. Chmiel, Gael Many, Damien Bouffard, Marie-Elodie Perga
Summary: In alkaline freshwater systems, bicarbonates can support gross primary production (GPP) even at low CO2 concentrations. However, the contribution of bicarbonates to GPP in lakes has not been quantified throughout the seasons. This study analyzes the daily stoichiometric ratios of CO2-O-2 and alkalinity-O-2 in a deep hardwater lake, revealing that alkalinity is the dominant inorganic carbon source for GPP in both littoral and pelagic environments during the stratified period.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2023)
Article
Ecology
Thibault Lambert, Pascal Perolo, Nicolas Escoffier, Marie-Elodie Perga
Summary: This study investigates the impact of human land use on dissolved organic matter (DOM) and bacterial respiration in the Lake Geneva basin. The results suggest that agriculture and urbanization have a significant influence on bacterial respiration, but a limited impact on net carbon exchanges between inland waters and the atmosphere.
Article
Geosciences, Multidisciplinary
Pascal Perolo, Bieito Fernandez Castro, Nicolas Escoffier, Thibault Lambert, Damien Bouffard, Marie-Elodie Perga
Summary: The gas transfer velocity (k) is a major source of uncertainty in assessing lake-atmosphere gas exchange. Existing models vary in predictions, with turbulence level near the air-water interface being a key factor affecting transfer rates. Wind shear and buoyancy-driven convection contribute to near-surface turbulence, impacting gas transfer in lakes.
EARTH SYSTEM DYNAMICS
(2021)
Article
Geosciences, Multidisciplinary
Harriet L. Wilson, Ana Ayala, Ian D. Jones, Alec Rolston, Don Pierson, Elvira de Eyto, Hans-Peter Grossart, Marie-Elodie Perga, R. Iestyn Woolway, Eleanor Jennings
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2020)
