Article
Environmental Sciences
Dunia Rios-Yunes, Tim Grandjean, Alena di Primio, Justin Tiano, Tjeerd J. Bouma, Dick van Oevelen, Karline Soetaert
Summary: Intertidal coastal sediments play a crucial role in nutrient transformation and storage, with sediment resuspension impacting nutrient release to the water column. In this study, in-situ sediment resuspension experiments were conducted in the Eastern and Western Scheldt estuaries, revealing predictable increases in ammonium and nitrite concentrations with greater erosion. However, phosphate dynamics differed between the two systems, with a decrease observed in the tidal bay and an increase in the estuarine sediments. This study highlights the varying effects of sediment resuspension on nutrient exchange in different tidal coastal environments.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Marine & Freshwater Biology
Sanni L. Aalto, Eero Asmala, Tom Jilbert, Susanna Hietanen
Summary: Coastal environments play a crucial role in regulating the transfer of nitrogen from land to sea, with variations in nitrate reduction processes between estuary and offshore archipelago environments in the Baltic Sea. The balance between denitrification and DNRA processes is influenced by the ratio of nitrate to autochthonous organic carbon, impacting the release of nitrous oxide and efficiency of nitrogen recycling in different coastal areas.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Engineering, Marine
Tracey Schafer, Nicole Dix, Shannon Dunnigan, K. Ramesh Reddy, Todd Z. Osborne
Summary: Hurricanes have the ability to export large amounts of nutrients from terrestrial systems into aquatic networks, affecting ecosystem metabolism. A study in the blackwater river of Florida found that hurricanes, especially after wet summer conditions, significantly increased the export of dissolved organic carbon. However, lower-category hurricanes may not have a significant impact on organic matter export.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Marine & Freshwater Biology
Sabrina Schultze, Tom Andersen, Dag O. Hessen, Anders Ruus, Katrine Borga, Amanda E. Poste
Summary: Climate and land-use changes have impacts on individual and interconnected ecosystems. This study examines the dynamics of organic matter (OM) and nutrients in two Norwegian river-to-fjord systems and finds that changes in river inputs can lead to shifts in coastal carbon and nutrient cycling, affecting ecosystem structure and function.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Ecology
Kenneth J. Anderson, John S. Kominoski, Andrea Nocentini, Sophia Hoffman
Summary: Hydrologic restoration has different effects on DOM in peat and marl marshes, and the water depth and soil phosphorus concentration are correlated with DOC concentrations and DOM composition.
RESTORATION ECOLOGY
(2023)
Article
Geochemistry & Geophysics
Jagos R. Radovic, Wei Xie, Renzo C. Silva, Thomas B. P. Oldenburg, Stephen R. Larter, Chuanlun Zhang
Summary: The study used a single injection Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) method to analyze organic extracts of surface sediments in the Pearl River estuary and coastal South China Sea. The results showed distinct molecular markers characterizing the freshwater and saline sites. This study demonstrates the potential of single injection FTICR-MS in probing the dynamic changes of organic matter sources and fates in estuaries influenced by anthropogenic activities.
ORGANIC GEOCHEMISTRY
(2022)
Article
Environmental Sciences
Robert L. Jenkins, Davina L. Passeri, Christopher G. Smith, David M. Thompson, Kathryn E. L. Smith
Summary: The effects of interior headland restoration on estuarine sediment transport processes were assessed using process-based numerical modeling in the Grand Bay estuary. The modeling results showed that the restored headland features acted as a sediment source and provided some sheltering effect on nearby shoals and marsh shorelines. Sediment fluxes were sensitive to wind directions and the presence of the restored headlands, but the greatest sediment fluxes were always export fluxes from the estuary. Mean sea level rise had a significant impact on suspended sediment concentrations, and SLR allowed for the suspension and deposition of sediments on the marsh platform. The influence of SLR was more impactful than the influence of the restoration features on changing sediment dynamics.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geochemistry & Geophysics
Enrique Isla, David J. DeMaster
Summary: The study found that in the Antarctic continental shelf regions, the preservation efficiency of biogenic silica is higher than that of organic carbon, likely due to factors such as glacial trough environments, reflecting differences between terrestrial and aquatic ecosystems.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Engineering, Environmental
Hongwei Yu, Miaomiao Liu, Diga Gang, Jianfeng Peng, Chengzhi Hu, Jiuhui Qu
Summary: Polyethylene microplastics have significant effects on the morphology, physiology, and stoichiometry of submerged plants, as well as on the nutrient cycle and microbial community in freshwater sediment.
Article
Ecology
Amanda L. Kuhn, John S. Kominoski, Anna R. Armitage, Sean P. Charles, Steven C. Pennings, Carolyn A. Weaver, Tom R. Maddox
Summary: The study found that Hurricane Harvey had impacts on surface sediment accretion, soil chemistry, and root biomass in coastal wetlands. Post-hurricane, there was a significant reduction in root biomass in both marsh and mangrove cells, which was correlated with enhanced nutrient limitation, potentially affecting ecosystem function and increasing vulnerability to disturbances.
Article
Environmental Sciences
Guodong Wang, Ming Jiang, Ming Wang
Summary: Coastal wetland restoration has been conducted worldwide, and understanding whether it can recover the original biogeochemical functioning is crucial. A study in the Liaohe River Delta, China, found that restored salt marshes had increased soil organic matter and abundance of elements, with soil organic matter explaining a significant portion of variation in element composition. The accumulation of soil organic matter plays a key role in the recovery of soil biogeochemical functioning in salt marshes.
LAND DEGRADATION & DEVELOPMENT
(2022)
Article
Biodiversity Conservation
Laxman Gardade, Lidita Khandeparker, Dattesh Desai, P. Atchuthan, Arga Chandrashekar Anil
Summary: The study on sedimentary organic matter composition in a monsoon-influenced tropical Zuari estuary on the west coast of India revealed spatial and temporal variations influenced by in situ production, bacterial re-working, riverine inputs, and hydrodynamics. Lower mid-estuarine region was identified as the major depositional site for organic matter, while the lower content of organic matter at the mouth of the estuary was attributed to high bacterial contribution. Estuarine morphology plays a significant role in organic matter deposition.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
Shu Chen, Dongqi Wang, Zhongjie Yu, Jiaqin Nie, Jie Chen, Yangjie Li, Xiaoli Zhang, Zhenlou Chen
Summary: This study examines the effect of temperature increase and tidal effects on nitrous oxide (N2O) emissions in intertidal sediments from the East China coast. The results show that warming promotes N2O emissions in most intertidal areas, but reduces emissions at some sampling sites. The overall effect of flooding on N2O emissions also changes with increasing temperature. The study also finds that differences in N2O emissions at the same nitrogen concentration are due to the quality and quantity of sediment organic matter.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Environmental Sciences
Zhe Wang, Min Lv, Chu-Long Huang, Dong-Dong Zhang, Ruixia Han, Gang Li, Ling-Xin Chen
Summary: This study found that anthropogenic activities, such as urbanization and oil combustion, have a significant impact on the distribution and properties of dissolved organic matter (DOM) in intertidal sediments. The release of organic matters from urbanization and the combustion of oil contribute to the higher concentration of aromatic compounds in the sediments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Marttiina V. Rantala, Carsten Meyer-Jacob, E. Henriikka Kivila, Tomi P. Luoto, Antti. E. K. Ojala, John P. Smol, Liisa Nevalainen
Summary: Global environmental change impacts the production, export, and degradation of organic carbon in northern lakes. Sedimentary biogeochemical records offer valuable insights into long-term changes that observational data may not capture. Research findings suggest that lake water organic matter exhibits UV photoreactivity, influencing carbon isotopes and C/N values, while sedimentary fingerprints provide clues on aquatic production, terrestrial inputs, and photodegradation processes in response to human-induced global carbon cycle shifts.
Article
Environmental Sciences
Anna de Kluijver, Martijn C. Bart, Dick van Oevelen, Jasper M. de Goeij, Sally P. Leys, Sandra R. Maier, Manuel Maldonado, Karline Soetaert, Sander Verbiest, Jack J. Middelburg
Summary: This study quantifies the carbon and nitrogen fluxes within the deep-sea sponge Geodia barretti, revealing dissolved organic matter as the main energy source and a net ratio of 0.77-0.81 for CO2 released to O-2 consumed. Metabolic rates in sponges vary with body size, with larger sponges showing lower specific rates despite higher overall metabolic patterns.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Sergej Y. M. H. Seepma, Sergio E. Ruiz-Hernandez, Gernot Nehrke, Karline Soetaert, Albert P. Philipse, Bonny W. M. Kuipers, Mariette Wolthers
Summary: The study investigated the effect of stoichiometry on CaCO3 formation and growth, showing that different solution stoichiometries and degrees of supersaturation can lead to different mechanisms influencing particle size, persistence, growth time, and ripening time towards micrometer-sized crystals. This research contributes to a better understanding of the formation of CaCO3 in various settings and may aid in its prediction and control.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Green & Sustainable Science & Technology
Dunia Rios-Yunes, Ana R. Borrero-Santiago, K. Avarachen Mathew, Susana V. Gonzalez, Tomasz M. Ciesielski, Alexandros G. Asimakopoulos, Murat V. Ardelan
Summary: This study evaluated the changes in the composition of DOM in sediments from a CCS site in the Baltic Sea during CO2 seepage, and found that DOM compounds were affected under pH7 conditions.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Multidisciplinary Sciences
Sam B. Weber, Andrew J. Richardson, Judith Brown, Mark Bolton, Bethany L. Clark, Brendan J. Godley, Eliza Leat, Steffen Oppel, Laura Shearer, Karline E. R. Soetaert, Nicola Weber, Annette C. Broderick
Summary: Research shows that pelagic seabirds breeding on tropical islands can deplete their primary prey species over a considerable area, a phenomenon known as "Ashmole's halo". The study results suggest that the gradient of prey depletion by seabirds is mirrored by an opposing trend in their foraging effort, which is not influenced by environmental factors and can be approximated by a model.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
Tanja Stratmann, Karline Soetaert, Daniel Kersken, Dick van Oevelen
Summary: Polymetallic nodule fields play a critical role in supporting the integrity of the abyssal food web, and the removal of nodules may result in reduced local benthic biodiversity.
SCIENTIFIC REPORTS
(2021)
Article
Oceanography
Evert de Froe, Sandra R. Maier, Henriette G. Horn, George A. Wolff, Sabena Blackbird, Christian Mohn, Mads Schultz, Anna-Selma van der Kaaden, Chiu H. Cheng, Evi Wubben, Britt van Haastregt, Eva Friis Moller, Marc Lavaleye, Karline Soetaert, Gert-Jan Reichart, Dick van Oevelen
Summary: This study examines the distribution of organic matter under tidal activity in a transect on the south-eastern slope of Rockall Bank in the Northeast Atlantic Ocean. Results show that the water column above the coral mound is more dynamic, with high variability in physical parameters and nutrient concentrations in the bottom water. A diurnal tidal wave replenishes nutrients in the surface water, while an internal wave is recorded above the coral mound. The benthic community feeds on various food sources, including phytodetritus and zooplankton.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2022)
Article
Oceanography
Dunia Rios-Yunes, Justin C. Tiano, Pieter van Rijswijk, Emil De Borger, Dick van Oevelen, Karline Soetaert
Summary: This study investigates the differences in biogeochemical fluxes between intertidal and subtidal sediments of the Dutch Eastern Scheldt (ES) and assesses the potential impacts of ongoing erosion on the sedimentary ecosystem. The results suggest that intertidal sediments are more reactive and exhibit higher oxygen fluxes compared to subtidal sediments, indicating a strong influence from microphytobenthos. The intertidal areas also display a different nutrient flux pattern, with nutrients being adsorbed into the sediment instead of released into the water column. The predicted habitat loss may have significant consequences for coastal biogeochemistry.
CONTINENTAL SHELF RESEARCH
(2023)
Article
Marine & Freshwater Biology
A. E. Stuart-Lee, J. Mortensen, T. Juul-Pedersen, J. J. Middelburg, K. Soetaert, M. J. Hopwood, A. Engel, L. Meire
Summary: The release of meltwater from marine-terminating glaciers influences primary production in fjords along Greenland's coastline. However, it is still unclear how local ecosystems will adapt and how it will affect hydrography as these glaciers retreat onto land. In this study, we examined how marine- and land-terminating glaciers respectively influence bloom dynamics in two fjords in west Greenland.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Ecology
Anna-Selma van der Kaaden, Sandra R. Maier, Koen Siteur, Laurence H. De Clippele, Johan van de Koppel, Sam J. Purkis, Max Rietkerk, Karline Soetaert, Dick van Oevelen
Summary: Complexity theory predicts that self-organized, regularly patterned ecosystems store more biomass and are more resilient than spatially uniform systems. We found regular spatial patterns in cold-water coral reefs and argue that these are likely the result of self-organization. Our research also indicates that cold-water corals can adjust their spatial configuration, providing resilience in the face of environmental changes.
Article
Ecology
Justin C. Tiano, Jochen Depestele, Gert Van Hoey, Joao Fernandes, Pieter van Rijswijk, Karline Soetaert
Summary: Dynamic sandy environments are generally less vulnerable to mechanical stress compared to silty low-energy habitats. However, biogenic reef communities may provide an exception to this. This study explores the effects of bottom trawl fishing on a coastal ecosystem dominated by the tube-building polychaete Lanice conchilega.
Article
Ecology
Alice E. Webb, Didier M. de Bakker, Karline Soetaert, Tamara da Costa, Steven M. A. C. van Heuven, Fleur C. van Duyl, Gert-Jan Reichart, Lennart J. de Nooijer
Summary: Coral reefs worldwide are declining, with changes in biogeochemical processes. Shallow degraded Caribbean reef habitats show low production and high recycling rates in different benthic assemblages.
Article
Ecology
Emil De Borger, Justin Tiano, Ulrike Braeckman, Adriaan D. Rijnsdorp, Karline Soetaert
Summary: Bottom trawling in shelf seas can have significant impacts on benthic metabolism, leading to reduced organic carbon mineralization rates and changes in oxygen and nitrate concentrations in sediment. The effects vary depending on trawling frequency and sediment type, with physical organic carbon removal through trawl-induced resuspension of sediments identified as the main cause of the changes in the mineralization process.
