Article
Environmental Sciences
Briannyn L. Woods, Anton P. van de Putte, Mark A. Hindell, Ben Raymond, Ryan A. Saunders, Andrea Walters, Rowan Trebilco
Summary: This study used data from Myctobase to model the abundance of eight key mesopelagic fish species in the Southern Ocean. The results showed that depth and solar position were important predictors, and species were stratified in their depth distribution. The abundance of mesopelagic fish is influenced by diel vertical migration and meso- and sub-mesoscale oceanographic features, with the Polar Front being a major delimiting feature.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Maria Anton-Pardo, Milan Muska, Tomas Juza, Ivana Vejrikova, Lukas Vejrik, Petr Blabolil, Martin Cech, Vladislav Drastik, Jaroslava Frouzova, Michaela Holubova, Milan Riha, Zuzana Sajdlova, Marek Smejkal, Jiri Peterka
Summary: Temporal and spatial heterogeneity in the distribution of cladocerans in lakes is influenced by abiotic and biotic factors. The diel vertical and horizontal migrations of cladocerans were studied in two deep lakes in the Czech Republic, revealing differences in distribution patterns due to macrophyte cover and fish assemblages. Temporal variations and diurnal deficits in cladoceran assemblages were observed in both lakes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biology
Julia L. Y. Spaet, Paul A. Butcher, Andrea Manica, Chi Hin Lam
Summary: Understanding the movement and behavior of large marine predators, such as sharks, is crucial for their conservation. By tagging immature white sharks in Australian and New Zealand waters, researchers found that these sharks frequently dive up and down the water column and exhibit different diving behaviors during the day and night.
Article
Geosciences, Multidisciplinary
Natasha Henschke, Yves Cherel, Cedric Cotte, Boris Espinasse, Brian P. Hunt, Evgeny A. Pakhomov
Summary: The study focused on the vertical distribution and size-dependent migrations of the pelagic tunicate Salpa thompsoni in the Southern Indian Ocean, specifically on the Kerguelen Plateau. It found that smaller blastozooids and oozoids were the strongest vertical migrators, while larger counterparts did not show consistent diel cycles in their vertical distribution. This suggests high predation pressure on the smallest blastozooids and oozoids.
JOURNAL OF MARINE SYSTEMS
(2021)
Article
Environmental Sciences
Fan Qin, Marc Amyot, Andrea Bertolo
Summary: The production of highly toxic monomethylmercury (MeHg) is unevenly distributed in the water column. The role of water column heterogeneity, especially zooplankton grazers, in mercury (Hg) cycling is still not well understood. This study found a significant association between the presence of zooplankton and the concentrations of dissolved total Hg (DTHg) and total Hg (THg) in the water. Results suggest that the heterogeneity of biotic factors, including phytoplankton and zooplankton, plays a key role in the cycling of total Hg and MeHg in boreal lakes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Wuju Son, Jee-Hoon Kim, Eun Jin Yang, Hyoung Sul La
Summary: The diel vertical migration (DVM) of zooplankton in the Arctic Ocean varies among key copepod species. Calanus glacialis and Calanus hyperboreus show non-DVM behaviors, while Metridia longa exhibits a typical DVM pattern. These findings provide important insights into the vertical distribution variations of copepod species in the rapidly changing Arctic marine environment.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Ruping Ge, Yixuan Li, Hongju Chen, Facan Lei, Yunyun Zhuang, Guangxing Liu
Summary: Understanding the diel vertical migration patterns of zooplankton is important for biological pumping and pelagic food webs. However, limited knowledge exists about the DVM patterns of zooplankton with different functional traits. This study used a trait-based approach to investigate the vertical distributions of zooplankton in the North Pacific Subtropical Gyre, and found that different functional groups exhibited distinct DVM patterns.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Boris Cisewski, Hjalmar Hatun, Inga Kristiansen, Bogi Hansen, Karin Margretha H. Larsen, Solva Karadottir Eliasen, Jan Arge Jacobsen
Summary: Records from moored Acoustic Doppler Current Profilers (ADCP) provide new insights into the dynamics of deep scattering layers (DSL) and diel vertical migration (DVM) of mesopelagic biomass in the southern Norwegian Sea, with seasonal variations and optical conditions influencing the activity of pelagic and mesopelagic species in the region.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Biodiversity Conservation
Satoshi Nirazuka, Ryosuke Makabe, Kerrie M. Swadling, Masato Moteki
Summary: Myctophid fish, such as Electrona antarctica, play a significant role as a trophic link between zooplankton and higher predators in the Southern Ocean. This study found that larval E. antarctica mainly feed on phyto-detritus, diatom frustules, and larvacean filters, rather than zooplankton, during their early developmental stages. This knowledge contributes to our understanding of the life history of E. antarctica and the oceanic food webs in the Southern Ocean.
Article
Oceanography
Xiaoting Yang, Eli Tziperman
Summary: Research shows that while Southern Ocean winds and eddies contribute to the stratification of the middepth interior, the exponential shape of the profiles also involves interior mixing.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2022)
Article
Ecology
Sabrina Gignac Brassard, Milla Rautio, Andrea Bertolo
Summary: Different physical factors such as solar radiation and wind have strong vertical gradients in lake water columns and affect the distribution of aquatic organisms. The vertical distribution of zooplankton in lakes is influenced by multiple factors including light, resources, and predation. This study investigates the vertical distribution of zooplankton in boreal lakes, showing that both predation and resources are associated with depth selection, but different taxa have different responses to each factor. The presence of stenothermic fish in boreal lakes also affects zooplankton behavior differently compared to the classical Diel Vertical Migration (DVM) paradigm.
FRESHWATER BIOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Kanchana Bandara, Sunnje L. Basedow, Geir Pedersen, Vigdis Tverberg
Summary: Vertical behavior, such as diel vertical migration (DVM) and swarming, is widespread among zooplankton. In the Norwegian Sea, synchronized DVM and large near-surface swarms were observed in the zooplankton community. The zooplankton community was concentrated in the upper 20 meters in calm weather but retreated to greater depths in the presence of increased near-surface turbulence, indicating synchronized schooling behavior.
JOURNAL OF MARINE SYSTEMS
(2022)
Article
Environmental Sciences
Jun Pan, Fangping Cheng, Fei Yu, Yongqiang Shi, Fan Sun, Guangcheng Si, Chuanjie Wei, Xinyuan Diao, Yongfang Zhao
Summary: Calanus sinicus, a key species in Chinese coastal marine ecosystems, shows fluctuations in population size due to temperature changes. Research indicates that the main population prefers to stay below the subsurface chlorophyll a maximum layer in the Yellow Sea Cold Water Mass throughout the summer, exhibiting a diel vertical migration trend for feeding. Factors influencing these behaviors include temperature, dissolved oxygen concentrations, and column depth.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Engineering, Environmental
Tongzhu Han, Junhui Chen, Kun Lin, Xiuping He, Shujiang Li, Tengfei Xu, Ming Xin, Baodong Wang, Chenguang Liu, Jiangtao Wang
Summary: The contamination status and transport of PFASs in the Indian Ocean and Northwest Pacific Ocean were investigated. The study found that certain PFASs were widely distributed in the surface seawater, with PFHpA and PFOA being the most predominant. The study also revealed a surface-enrichment and depth-depletion pattern for PFASs in the water column.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Jiaqing Zeng, Xinghua Luo, Yizhi Cheng, Wenshun Ke, William Hartley, Chuxuan Li, Jun Jiang, Feng Zhu, Shengguo Xue
Summary: A comprehensive study was conducted on an abandoned zinc smelting site in Southern China to determine contamination characteristics and spatial distribution patterns of toxic metal(loid)s in soils. The study found that soil environmental quality was seriously threatened by Cd, Zn, As, Pb, and Hg contaminants, with strong spatial heterogeneity in their distribution. The study also showed that the pollutants mainly concentrated in fill layers, with different contaminants exhibiting varying migration depths and spatial variability.
JOURNAL OF HAZARDOUS MATERIALS
(2022)