Article
Marine & Freshwater Biology
K. Amorim, M. L. Zettler
Summary: This study provides a comprehensive examination of the distribution of macrofaunal assemblages in the Oxygen Minimum Zone (OMZ) off Namibia, which is one of the least studied benthic marine macrofaunas in the world. The research analyzes the distribution of macrofaunal assemblages in terms of abundance and biomass, and identifies the key factors that structure the benthic macrofauna in the Namibian shelf. Six faunal assemblages were defined based on multivariate analysis.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Environmental Sciences
Christian Furbo Reeder, Carolin Regina Loscher
Summary: This study explored the diversity of genes involved in N-2 fixation by screening metagenomes and -transcriptomes from different ocean regions, identifying a generally increased diversity compared to previous studies based on the nifH gene. While gene expression of alternative nitrogenases could not be confirmed, diazotrophs harboring the potential for alternative nitrogenases were detected.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Ecology
Vijaya Raghavan Rangamaran, Sai H. Sankara Subramanian, Karpaga Raja Sundari Balachandran, Dharani Gopal
Summary: This study investigated the bacterial communities at different depths of the Arabian Sea OMZ using high-throughput sequencing. The results showed high bacterial diversity in deep waters and sediment samples, with less richness at the core OMZ depths. Bacterial community composition varied with depth and dissolved oxygen levels, and predictive functional annotation suggested the presence of active nitrogen, sulphur, carbon, and methane metabolic cycles. The study also revealed the presence of nitrogen reduction bacterial group below the core OMZ depths, which may provide insights into the expansion of OMZ region in Arabian Sea.
Article
Environmental Sciences
Christian Furbo Reeder, Damian L. Arevalo-Martinez, Joan A. Carreres-Calabuig, Tina Sanders, Nicole R. Posth, Carolin Regina Loscher
Summary: This study provides a detailed analysis of diazotrophic diversity in the North BUS OMZ and the Angola tropical zone (ATZ), revealing the presence of various diazotrophs in the OMZ but no active N-2 fixation. The results show regional variations in the role and diversity of diazotrophs in OMZs, which are crucial for understanding the nitrogen cycle in OMZ waters and predicting the future development of OMZ biogeochemistry in a changing ocean.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Aurelien Paulmier, Gerard Eldin, Jose Ochoa, Boris Dewitte, Joel Sudre, Veronique Garcon, Jaques Grelet, Kobi Mosquera-Vasquez, Oscar Vergara, Helmut Maske
Summary: The study revealed the presence of stable acoustic backscatter features in the oxygen deficient mesopelagic layer off Peru, independent of time and essential for the survival of microorganisms in this environment.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Catherine V. Davis, Shannon Doherty, Jennifer Fehrenbacher, Karen Wishner
Summary: Oxygen limited marine environments play a crucial role in global nutrient cycling and habitat availability. However, finding suitable proxies for paleoclimate interpretations is challenging. This study suggests using Mg/Ca ratios to quantitatively reconstruct paleotemperatures of oxygen minimum zones. Mn/Ca and Zn/Ca ratios can be used to reconstruct the habitat of G. hexagonus. Sr/Ca ratios show a strong correlation with dissolved oxygen, indicating its potential as an indicator of oxygen minimum zone intensity. Analyzing these trace element ratios in the shells of oxygen minimum zone species can greatly enhance multiproxy reconstructions.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Oceanography
Linda A. Kuhnz, Lisa Gilbane, Guy R. Cochrane, Charles K. Paull
Summary: This study provides detailed biological characterization of the previously unexplored benthos in central California, USA seafloor, showing the influence of various factors such as topography and habitat characteristics on marine communities, with oxygen concentration not being the main predictor of species richness and density.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2022)
Article
Geosciences, Multidisciplinary
Julius J. M. Busecke, Laure Resplandy, Sam J. Ditkovsky, Jasmin G. John
Summary: This study examines the impact of global ocean oxygen loss on the largest oxygen minimum zone (OMZ) in the tropical Pacific using Earth system models. The projections suggest a consistent pattern of expansion of low oxygenated waters, slight contraction of the OMZ core, and spatial redistribution of hypoxic waters. Changes in circulation and biology drive these shifts, with reduced subtropical ventilation controlling the expansion and a combination of circulation and biological changes explaining the contraction.
Article
Ecology
Abdulaziz Anas, Balu Tharakan, Baby Divya, Shijin Ameri, Saravanane Narayanan
Summary: This study investigated the microbial distribution and diversity in the Arabian Sea Oxygen Minimum Zone (OMZ) using fluorescence in situ hybridization (FISH) and 16S rRNA gene amplicon sequencing. The results revealed a diverse group of bacteria in the OMZ that were capable of metabolizing complex molecules under hypoxic conditions. This research highlights the potential biotechnological applications of these microorganisms.
REGIONAL STUDIES IN MARINE SCIENCE
(2023)
Review
Microbiology
Andrew M. Long, Sophie K. Jurgensen, Ariel R. Petchel, Emily R. Savoie, Jennifer R. Brum
Summary: Oxygen minimum zones (OMZs) have significant effects on marine microbial ecology and biogeochemical processes, especially under low oxygen conditions. Microorganisms in OMZs play important roles in carbon, nitrogen, and sulfur cycling, with involvement of viruses and protists. Additionally, the different roles of microbial communities in oxic and anoxic environments are noteworthy for understanding microbial responses to deoxygenation.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Geochemistry & Geophysics
Christopher Siebert, Florian Scholz, Wolfgang Kuhnt
Summary: Research has found that the Mo isotope composition in seawater before the late Cretaceous OAE2 was lighter than in the modern ocean, likely due to decreased Mo burial in oxic sediments under globally reduced oxygen concentrations. During OAE2, a further decrease in Mn burial rates in the open ocean could buffer the Mo seawater isotope signal, resulting in a small offset. Changes to the relative size of both the anoxic and oxic sinks are important considerations when interpreting paleo-Mo isotope data.
Article
Geosciences, Multidisciplinary
Ramanand Yadav, Sushant S. Naik
Summary: By analyzing samples from the Ocean Drilling Program in the Maldives, we found that carbonate preservation has declined in the last 30,000 years, possibly due to organic matter degradation in sediments. The ratio of C-org/CaCO3 was higher during the last glacial maximum, but lower during the last deglacial period and the Holocene. Additionally, heavier planktic foraminifera shell weights during the last deglacial period indicate increased carbonate preservation, which is linked to the release of carbon dioxide from the ocean to the atmosphere.
GEO-MARINE LETTERS
(2022)
Article
Environmental Sciences
Sabyasachi Sautya, Santosh Gaikwad, Sanofar Khokher, Umesh Kumar Pradhan, Soumya Chatterjee, Amita Choudhury, Balaram Sahu, Suman Attri
Summary: The continental margin is a diverse habitat supporting incredible biodiversity in oceans. Meiofauna is an important component of benthic fauna across regions, but its study in the deep Indian Ocean is limited. The study in the western Indian continental margin and eastern Arabian Sea revealed the influence of oxygen, depth gradients, and organic matter on meiofaunal community structure.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Thadickal V. Joydas, Seerangan Manokaran, Angel Borja, Lotfi Rabaoui, Karuppasamy P. Manikandan, T. T. M. Ashraf, K. M. Aarif, Syed A. Hussain, Meerja H. Baig, Mohammed Shoeb, Periyadan K. Krishnakumar, Mohammad A. Qurban
Summary: The Gulf of Aqaba is a narrow, warm, high-salinity, oligotrophic water body with a diverse benthic community dominated by polychaetes. The ecological status of the benthic communities in the Gulf is good, with comparable density and diversity to the Red Sea but lower than the Arabian Sea and the Mediterranean Sea. This baseline study is expected to provide valuable data for future environmental impact assessments in light of proposed urbanization along the Saudi coastal areas of the Gulf.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Anna Stepien, Krzysztof Pabis, Robert Sobczyk, Bjorn Serigstad
Summary: The Gulf of Guinea is one of the least sampled marine basins in the world. A study in Ghana found a rich diversity of cumacean communities, with a high number of new species but low overall abundance. Shallow waters and slopes had higher species richness, while deeper areas showed unique species composition. Factors like oxygen content, sediments, and pollution influenced the distribution of cumacean communities.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Bernd R. Schoene, Xizhi Huang, Anne Jantschke, Regina Mertz-Kraus, Michael L. Zettler
Summary: This study found that the shells of the bivalve mollusk, Arctica islandica, can be used as proxies for measuring dissolved oxygen levels in water. The study also evaluated the potential use of two other bivalves, Astarte elliptica and Astarte borealis, as alternative and interchangeable proxies for dissolved oxygen. The results showed that all three species had statistically significant and inverse correlations with dissolved oxygen concentrations. Astarte elliptica may provide slightly more precise dissolved oxygen data, but has a shorter lifespan. Both Astarte species showed stronger correlations with dissolved oxygen compared to Arctica islandica.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Multidisciplinary Sciences
K. Amorim, N. Loick-Wilde, B. Yuen, J. T. Osvatic, J. Waege-Recchioni, B. Hausmann, J. M. Petersen, J. Fabian, D. Wodarg, M. L. Zettler
Summary: This study investigates the trophic diversity and nitrogen biochemical pathways of symbionts in three molluscs living in the Namibian oxygen minimum zone sediments. The results show that L. capensis relies on a symbiosis with sulfur-oxidizing bacteria, L. bicuspidatus exhibits mixotrophic behavior, and N. vinctus displays omnivory. Diatoms are identified as an important component of the diet for L. bicuspidatus and N. vinctus.
SCIENTIFIC REPORTS
(2022)
Article
Biology
Mayya Gogina, Judith Rahel Renz, Stefan Forster, Michael L. Zettler
Summary: In this study, a traits-based index called BIPc was developed to assess the bioirrigation potential in the south-western Baltic Sea. The results support the usefulness of this index and reveal its limitations. The study also used modeling techniques to map the spatial differences in ecosystem functioning and identified key species contributing to bioirrigation potential.
Article
Fisheries
J. Rasmus Nielsen, Berthe M. J. Vastenhoud, Sieme Bossier, Flemming Mohlenberg, Asbjorn Christensen, Rabea Diekman, Grete E. Dinesen, Ole R. Eigaard, Mayya Gogina, Michael L. Zettler, Alexander Darr, Francois Bastardie
Summary: This study compared the short term impacts of fishing pressure with the variability induced by environmental drivers on quantitative benthic community impact indicators. The results showed that demersal fishing had evident impacts on all indicators, especially in soft muddy and sandy habitats and during the second quarter of the year. Additionally, all environmental drivers, especially current speed, had significant impacts on all indicators, which were of the same or larger magnitude as fishing impacts. Therefore, when using quantitative benthic fishing impact indicators, the short term influence of environmental drivers and seasonal differences in fishing pressure should be considered.
FISHERIES RESEARCH
(2023)
Article
Zoology
Michael L. Zettler, Ed A. Hendrycks, Andre Freiwald
Summary: A new species of pontogeneiid amphipod, Dautzenbergia concavipalma sp. nov., was discovered from cold-water corals off Angola. This study provides a detailed description and comparison with known species of the genus, as well as a key to Dautzenbergia species.
Article
Biodiversity Conservation
Jan Beermann, Lars Gutow, Steffen Wuehrdemann, Rebecca Konijnenberg, Kathrin Heinicke, Tim Bildstein, Sandra Jaklin, Manuela Gusky, Michael L. Zettler, Jennifer Dannheim, Roland Pesch
Summary: Marine sublittoral sandbanks in the southern North Sea serve as important feeding grounds for larger crustaceans, fish, and seabirds. However, sandbanks in the southeastern North Sea have been poorly studied until now. Through analyzing extensive datasets, it was found that these sandbanks have complex spatial structuring and share common structural features in their benthic communities. The presence of the sea urchin Echinocardium cordatum in the sandbanks may promote sediment-bound biogeochemical activity, highlighting their high ecological value and the need for marine conservation.
BIODIVERSITY AND CONSERVATION
(2023)
Article
Geosciences, Multidisciplinary
Agata Feldens, Denise Marx, Anne Herbst, Alexander Darr, Svenja Papenmeier, Matthias Hinz, Michael L. L. Zettler, Peter Feldens
Summary: This study provides a better understanding of geogenic reef distribution in the southern Baltic Sea and highlights the implications of survey-related factors on automated boulder classification. The maps of geogenic reef distribution in three sites of the southern Baltic Sea are based on full-coverage backscatter surveys using different sonar and echo sounder systems. The study shows differences in reef distribution compared to previous maps and identifies the negative effects of survey factors on automated boulder classification.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Biology
Katharina Romoth, Alexander Darr, Svenja Papenmeier, Michael L. L. Zettler, Mayya Gogina
Summary: An increasing number of different habitats leads to an increasing number of species and has been considered a key driver for biodiversity. In this study, a newly proposed measure of substrate heterogeneity was tested using underwater video imaging. The results showed that small patches of different soft sediment types were associated with elevated species richness and a higher rate of occurrence of rare species. The findings highlight the importance of microhabitats for benthic biodiversity.
Article
Marine & Freshwater Biology
K. Amorim, M. L. Zettler
Summary: This study provides a comprehensive examination of the distribution of macrofaunal assemblages in the Oxygen Minimum Zone (OMZ) off Namibia, which is one of the least studied benthic marine macrofaunas in the world. The research analyzes the distribution of macrofaunal assemblages in terms of abundance and biomass, and identifies the key factors that structure the benthic macrofauna in the Namibian shelf. Six faunal assemblages were defined based on multivariate analysis.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Environmental Sciences
Xizhi Huang, Liqiang Zhao, Michael L. Zettler, Regina Mertz-Kraus, Klaus Peter Jochum, Bernd R. Schoene
Summary: The Baltic Sea is an excellent region for studying oxygen depletion processes. Reconstructing past low-oxygen occurrences is crucial to understanding current ecological disturbances and developing mitigation strategies. A high-resolution dissolved oxygen record since the mid-19th century was reconstructed from Manganese/Shell values of Arctica islandica collected in the Mecklenburg Bight, showing similar low oxygenation events in the late 19th century and late 20th century, but with increased variability. The study highlights the importance of conducting more high-resolution retrospective studies to improve the management and protection of ecosystems in the Baltic Sea.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biodiversity Conservation
Michael L. Zettler, Falk Pollehne
Summary: In 2015, we examined the macrozoobenthic community composition in the deep trough of the Gulf of St. Lawrence, Canada, along a dissolved oxygen gradient. Our findings showed that the dominant communities shifted from molluscs to polychaetes as oxygen saturation decreased. Surprisingly, the estuary stations with the lowest oxygen saturation levels had the highest species diversity, density, and biomass. Key genera in the hypoxic zone included bivalves, cumaceans, amphipods, and polychaetes. Our study suggests that the stability of environmental conditions and the constant supply of oxygen, even at low concentrations, play a crucial role in shaping community composition.
Article
Zoology
Michael l. Zettler, Ralf Bastrop, James k. Lowry
Summary: During two campaigns in Denmark and Namibia, a large number of scavenging amphipods mainly consisting of Scopelocheirus sp. were found. Although these species appeared identical in morphology, analysis of subtle morphological and genetic differences revealed the existence of a previously undescribed species in the Namibian sea area, named Scopelocheirus sossi sp. nov.
RECORDS OF THE AUSTRALIAN MUSEUM
(2023)
Article
Remote Sensing
Inken Schulze, Mayya Gogina, Mischa Schoenke, Michael L. Zettler, Peter Feldens
Summary: This study investigated the seasonal variations in acoustic backscatter intensities in different habitats in the southwestern Baltic Sea. The results showed that different habitats have different seasonal responses, and the use of multiple frequencies can better identify these variations.
FRONTIERS IN REMOTE SENSING
(2022)
Article
Marine & Freshwater Biology
Katharina Romoth, Mayya Gogina, Kolja Beisiegel, Alexander Darr, Michael Lothar Zettler
Summary: The rare and protected sea star, Crossaster papposus, was found in the German North and Baltic Sea waters during monitoring activities using towed camera platform imagery. This finding is significant as the last documented sighting of this species in the area was in 1871, indicating its rarity in the Baltic Sea.
OCEANOLOGICAL AND HYDROBIOLOGICAL STUDIES
(2022)
Article
Geosciences, Multidisciplinary
Mayya Gogina, Anja Zettler, Michael L. Zettler
Summary: The availability of standardised biomass data is crucial for studying population dynamics, energy flows, fisheries, and food web interactions. This study presents the most detailed and statistically robust list of wet weight (WW), dry weight (DW), and ash-free dry weight (AFDW) ratios. The dataset, consisting of over 17,000 records for 497 taxa, provides an opportunity for reuse and repurposing with reference information. It allows users to combine data with their own local data, quantify natural variability and uncertainty, and can be accessed through an unrestricted repository.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Geosciences, Multidisciplinary
X. Flores-Melo, R. Giesecke, I. R. Schloss, M. P. Latorre, X. Durrieu de Madron, F. Bourrin, M. L. Spinelli, C. Menniti, H. E. Gonzales, E. Menschel, J. Martin
Summary: This study presents an evaluation of the downward fluxes and composition of particulate matter in the Beagle Channel. The results show that the fluxes and composition of particulate matter differ between the western and eastern parts of the channel, with the former influenced by glacial and organic material, and the latter dominated by river inputs and phytoplankton blooms. This research contributes to understanding the impact of climate change on the biological carbon pump and land-sea connections in this high-latitude ecosystem.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Simone M. A. Lira, Ralf Schwamborn, Mauro de Melo Junior, Humberto L. Varona, Syumara Queiroz, Doris Veleda, Alef J. Silva, Sigrid Neumann-Leitao, Moacyr Araujo, Catarina R. Marcolin
Summary: In this study, CTD and ADCP data, as well as zooplankton samples from Fernando de Noronha Archipelago, were used to analyze the relationship between flow, island topography, chlorophyll-a fluorescence, and zooplankton abundance. The study found the presence of island and larval island effects downstream, and an upstream island effect upstream.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Olga Yu. Evseeva, Alexander G. Dvoretsky
Summary: This study investigated the species composition and spatial distribution of bryozoan diversity in the southern region of Franz Josef Land. A total of 151 bryozoan species were found, including 22 species recorded for the first time in this region. The diversity of bryozoans in this area is influenced by environmental factors such as depth, temperature, and the content of stones and shells.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Emma F. Young, Sally E. Thorpe, Angelika H. H. Renner, Eugene J. Murphy
Summary: Antarctic krill is a key species in the Southern Ocean and also the target of a commercial fishery. This study focuses on understanding the physical and behavioral drivers of krill movement and retention in the South Orkney Islands region through a regional modeling approach. The results suggest that oceanic transport and retention of krill are influenced by oceanographic variability and krill behavior.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Viviane David, Anne Mouget, Pierre Thiriet, Corentin Minart, Yannick Perrot, Loic Le Goff, Olivier Bianchimani, Solene Basthard-Bogain, Tristan Estaque, Justine Richaume, Jean-Francois Sys, Adrien Cheminee, Eric Feunteun, Anthony Acou, Patrice Brehmer
Summary: Scientists combined split-beam and multibeam echosounders to detect and classify different fish species, and found that acoustic data significantly improved the accuracy of species classification. These acoustic methods have important implications for marine management and decision-making.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Jia-Hui Xie, Xue-Lin Shao, Kai Ma, Li Gao
Summary: Chaetomorpha linum can store a large amount of phosphorus and utilize it for growth when phosphate is abundant, and it can produce alkaline phosphatase and release mobile phosphorus from sediments when phosphate is deficient. The sources of phosphorus supporting the blooms of C. linum vary seasonally in Swan Lagoon.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
A. A. Kubryakov, A. I. Mizyuk, S. V. Stanichny
Summary: This article investigates the evolution of the Sevastopol eddies using altimetry measurements and a high-resolution Nemo numerical model. The eddies can reside in the Black Sea for >3-6 months, impacting cross-shelf exchange and nutrient fluxes. The stationarity of the eddies is mainly due to the continental slope acting as a barrier, preventing cyclonic propagation.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Qingyuan Yang, Guoping Zhu
Summary: This study investigated the feeding habits of the spiny icefish in the Bransfield Strait and used biochemical tracers to demonstrate the variability in its diet, which is influenced by the availability of krill and the dynamic hydrography. The results highlight the potential of biochemical tracers in reflecting changes in prey's diet in a highly dynamic environment.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Andreana Cadaillon, Clara M. Iachetti, Ricardo Giesecke, Valeska Vasquez Lepio, Andrea Malits, Irene R. Schloss
Summary: A joint Chilean-Argentinian research cruise in the Beagle Channel revealed spatial and temporal heterogeneity of plankton abundance and composition. Plankton assemblages varied with bathymetry, water temperature, and nutrient availability. The easternmost sector of the channel had the highest total cell abundances and a diverse mix of small and large diatoms.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Barbara P. Paiva, Carlos A. F. Schettini, Eduardo Siegle
Summary: The Sao Francisco River is an important river in Brazil, crossing the semi-arid region. A series of dams have been built along the river for hydropower, changing the flow significantly. A hydrodynamic model was used to simulate the effects of flow changes on saline intrusion in the estuary. The simulations showed an increase in mixing and decrease in river contribution after the dams were built. The results can be used by management agencies to improve water quality for human consumption.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Xu Dong, Di Qi, Baohong Chen, Yingxu Wu, Xinqing Zheng, Hui Lin
Summary: Seasonal-scale local forcings reduce coastal pH and aragonite saturation state. The dynamics of carbonate system parameters were investigated in a coral habitat influenced by seasonal current patterns. Both Oaragonite and pH showed seasonal variations, controlled by dissolved inorganic carbon (DIC) and temperature. Ocean acidification scenarios projected a decrease in Oaragonite amplitude and an increase in hydrogen ion concentration ([H+]) amplitude.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Roman Cieslinski, Izabela Chlost, Michal Szydlowski
Summary: The Vistula Lagoon, one of the two lagoons on the Polish coast, is economically and environmentally significant. This study aims to calculate the water balance of the lagoon before and after the construction of a canal through the Vistula Spit. The construction of the new connection may impact the lagoon's water balance and its biotic and abiotic environment. Data on precipitation, evaporation, inflow from the catchment, and inflow/outflow through the Strait of Baltiysk were collected for mathematical modeling. The study suggests that the construction of the new canal will not significantly alter the lagoon's water balance but may cause environmental problems.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
F. P. Brandini, A. M. Silver, A. Gangopadhyay
Summary: We demonstrate that wind-driven Ekman transport enhances the advection and mixing of cells, leading to the transport of colder water from the Surface Antarctic Waters to the warmer waters of the northern Polar Front belt. This mechanism provides cells with a favorable temperature environment, allowing for specific species and community growth rates to develop blooms under non-light limiting macronutrients and iron conditions. Our findings have important implications for increased productivity in a future warming climate.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
John E. Garzon-Cardona, Ana M. Martinez, Boris P. Koch, Bernd Krock, Elbio D. Palma, Xianyu Kong, Ruben J. Lara
Summary: This study aimed to gain a better understanding of the role of dissolved organic matter (DOM) in the biogeochemistry of the Southern Patagonian shelf. The results showed that terrigenous input is the main source of ammonium and refractory carbon in the region, while the Antarctic Circumpolar Current contributes autochthonous DOM. Additionally, regeneration processes of nitrogen-rich water were found in the Tierra del Fuego Waters and Grande Bay regions.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Manoranjan Mishra, Tamoghna Acharyya, Bijay Halder, Celso Augusto Guimara Santos, Richarde Marques da Silva, Nihar Ranjan Rout, Debdeep Bhattacharyya
Summary: This study comprehensively analyzes the impacts of Tropical Cyclone Yaas on the mangrove forest in Bhitarkanika National Park, revealing significant ecosystem loss and changes in vegetation vigor and soil conditions, particularly an increase in salinity.
JOURNAL OF MARINE SYSTEMS
(2024)