Ulrike Hanz
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View article: Physical Mechanisms of Sediment Trapping and Deposition on Spatially Confined Mud Depocenters in High‐Energy Shelf Seas
Physical Mechanisms of Sediment Trapping and Deposition on Spatially Confined Mud Depocenters in High‐Energy Shelf Seas Open
Mud depocenters in shelf seas serve as a key element in the source‐to‐sink system of sediment transport on the Earth surface. Despite their undoubtful importance, physical mechanisms for formation, sediment budgeting, and cycling of locali…
View article: Twice the global average carbon burial efficiency in the Helgoland Mud Area of the North Sea: Insights into carbon sequestration in small-size depocenters on sand-dominated shelves
Twice the global average carbon burial efficiency in the Helgoland Mud Area of the North Sea: Insights into carbon sequestration in small-size depocenters on sand-dominated shelves Open
Continental shelves are integral to the global carbon cycle, yet uncertainties persist about the nature and extent of carbon burial, particularly in sand-dominated areas. In the sand-dominated North Sea, the Helgoland Mud Area (HMA) emerge…
View article: Comment on bg-2023-127
Comment on bg-2023-127 Open
Abstract. The nitrogen (N) isotope composition (δ15N) of cold-water corals is a promising proxy for reconstructing past ocean N cycling, as a strong correlation was found between the δ15N of the organic nitrogen preserved in coral skeleton…
View article: Occurrence and behavioral rhythms of the endangered Acadian redfish (Sebastes fasciatus) in the Sambro Bank (Scotian Shelf)
Occurrence and behavioral rhythms of the endangered Acadian redfish (Sebastes fasciatus) in the Sambro Bank (Scotian Shelf) Open
The genus Sebastes is a morphologically and ecologically diverse genus of rockfish characterized by high longevity, late-maturity and low natural mortality. On the northwest Atlantic continental shelf, the Acadian redfish ( Sebastes fascia…
View article: The important role of sponges in carbon and nitrogen cycling in a deep‐sea biological hotspot
The important role of sponges in carbon and nitrogen cycling in a deep‐sea biological hotspot Open
Deep‐sea sponge grounds are hotspots of biodiversity, harbouring thriving ecosystems in the otherwise barren deep sea. It remains unknown how these sponge grounds survive in this food‐limited environment. Here, we unravel how sponges and t…
View article: Biological hotspots in the deep seaEnvironmental controls and interactions in deep-sea sponge and coral assemblages
Biological hotspots in the deep seaEnvironmental controls and interactions in deep-sea sponge and coral assemblages Open
The deep sea is one of the least studied environments of our planet. It is often considered an unfavorable habitat due to its immense pressure, darkness and low temperature. Life there relies mostly on sinking organic material from the sur…
View article: Can Environmental Conditions at North Atlantic Deep-Sea Habitats Be Predicted Several Years Ahead? ——Taking Sponge Habitats as an Example
Can Environmental Conditions at North Atlantic Deep-Sea Habitats Be Predicted Several Years Ahead? ——Taking Sponge Habitats as an Example Open
Predicting the ambient environmental conditions in the coming several years to one decade is of key relevance for elucidating how deep-sea habitats, like for example sponge habitats, in the North Atlantic will evolve under near-future clim…
View article: Corrigendum: Seasonal Variability in Near-bed Environmental Conditions in the Vazella pourtalesii Glass Sponge Grounds of the Scotian Shelf
Corrigendum: Seasonal Variability in Near-bed Environmental Conditions in the Vazella pourtalesii Glass Sponge Grounds of the Scotian Shelf Open
CORRECTION article Front. Mar. Sci., 14 May 2021Sec. Deep-Sea Environments and Ecology https://doi.org/10.3389/fmars.2021.696777
View article: Long‐term Observations Reveal Environmental Conditions and Food Supply Mechanisms at an Arctic Deep‐Sea Sponge Ground
Long‐term Observations Reveal Environmental Conditions and Food Supply Mechanisms at an Arctic Deep‐Sea Sponge Ground Open
Deep‐sea sponge grounds are hotspots of benthic biomass and diversity. To date, very limited data exist on the range of environmental conditions in areas containing deep‐sea sponge grounds and which factors are driving their distribution a…
View article: Bacterial precursors and unsaturated long-chain fatty acids are biomarkers of North-Atlantic deep-sea demosponges
Bacterial precursors and unsaturated long-chain fatty acids are biomarkers of North-Atlantic deep-sea demosponges Open
Sponges produce distinct fatty acids (FAs) that (potentially) can be used as chemotaxonomic and ecological biomarkers to study endosymbiont-host interactions and the functional ecology of sponges. Here, we present FA profiles of five commo…
View article: Seasonal Variability in Near-bed Environmental Conditions in the Vazella pourtalesii Glass Sponge Grounds of the Scotian Shelf
Seasonal Variability in Near-bed Environmental Conditions in the Vazella pourtalesii Glass Sponge Grounds of the Scotian Shelf Open
The Scotian Shelf harbors unique aggregations of the glass sponge Vazella pourtalesii that provides an important habitat for benthic and pelagic fauna. Recent studies have shown that these sponge grounds have persisted in the face of stron…
View article: Physical oceanography during G. O. Sars cruise GS2018108 to an Arctic deep-sea sponge ground in 2018
Physical oceanography during G. O. Sars cruise GS2018108 to an Arctic deep-sea sponge ground in 2018 Open
Deep-sea sponge grounds are hotspots of benthic biomass and diversity. To date, very limited data exists on the range of environmental conditions in areas containing deep-sea sponge grounds and which factors are driving their distribution …
View article: Bacterial precursors and unsaturated long-chain fatty acids are biomarkers of North-Atlantic demosponges
Bacterial precursors and unsaturated long-chain fatty acids are biomarkers of North-Atlantic demosponges Open
Sponges produce distinct fatty acids (FAs) that (potentially) can be used as chemotaxonomic and ecological biomarkers to study endosymbiont-host interactions and the functional ecology of sponges. Here, we present FA profiles of five commo…
View article: Massive silicon utilization facilitated by a benthic‐pelagic coupled feedback sustains deep‐sea sponge aggregations
Massive silicon utilization facilitated by a benthic‐pelagic coupled feedback sustains deep‐sea sponge aggregations Open
Biogeochemical cycling of silicon (Si), largely affected by biological drivers, is pivotal to the ecological functioning of the ocean. Most knowledge regarding biological utilization of Si derives from research on phototrophic organisms ci…
View article: On giant shoulders: how a seamount affects the microbial community composition of seawater and sponges
On giant shoulders: how a seamount affects the microbial community composition of seawater and sponges Open
Seamounts represent ideal systems to study the influence and interdependency of environmental gradients at a single geographic location. These topographic features represent a prominent habitat for various forms of life, including microbio…
View article: On giant shoulders: How a seamount affects the microbial community composition of seawater and sponges
On giant shoulders: How a seamount affects the microbial community composition of seawater and sponges Open
Seamounts represent ideal systems to study the influence and interdependency of environmental gradients at a single geographic location. These topographic features represent a prominent habitat for various forms of life, including microbio…
View article: Microbial diversity and biogeochemical parameters at Schulz Bank seamount (Arctic Mid-Ocean Ridge) measured in summer 2016, 2017 and 2018
Microbial diversity and biogeochemical parameters at Schulz Bank seamount (Arctic Mid-Ocean Ridge) measured in summer 2016, 2017 and 2018 Open
Seamounts represent ideal systems to study the influence and interdependency of environmental gradients at a single geographic location. These topographic features represent a prominent habitat for various forms of life, including microbio…
View article: Environmental factors influencing benthic communities in the oxygen minimum zones on the Angolan and Namibian margins
Environmental factors influencing benthic communities in the oxygen minimum zones on the Angolan and Namibian margins Open
Thriving benthic communities were observed in the oxygen minimum zones along the southwestern African margin. On the Namibian margin, fossil cold-water coral mounds were overgrown by sponges and bryozoans, while the Angolan margin was char…
View article: Environmental factors influencing cold-water coral ecosystems in the oxygen minimum zones on the Angolan and Namibian margins
Environmental factors influencing cold-water coral ecosystems in the oxygen minimum zones on the Angolan and Namibian margins Open
Fossil cold-water coral mounds overgrown by sponges and bryozoans were observed in anoxic conditions on the Namibian margin, while mounds colonized by thriving cold-water coral reefs were found in hypoxic conditions on the Angolan margin. …
View article: High current event at an Arctic deep-sea sponge ground
High current event at an Arctic deep-sea sponge ground Open
Deep-sea sponge grounds are hotspots of benthic biomass and diversity comparable to tropical coral reefs. So far very limited data exists on the range of environmental conditions deep-sea sponges and their accompanying fauna thrive in or w…
View article: Physical oceanography during G. O. Sars cruise GS2016109A in June 2016, at the Schultz Massif Seamount (Norwegian/Greenland Sea)
Physical oceanography during G. O. Sars cruise GS2016109A in June 2016, at the Schultz Massif Seamount (Norwegian/Greenland Sea) Open
Physical oceanography during G. O. Sars cruise GS2016109A in June 2016, at the Schultz Massif Seamount (Norwegian/Greenland Sea)
View article: Water column characteristics obtained by yoyo-CTD and mooring sensors and benthic organism abundance of a biologically rich seamount of the Mid-Atlantic Ridge
Water column characteristics obtained by yoyo-CTD and mooring sensors and benthic organism abundance of a biologically rich seamount of the Mid-Atlantic Ridge Open
The turbulence regime near the crest of a biologically rich seamount of the Mid-Atlantic Ridge southwest of the Azores was registered in high spatial and temporal resolution. Internal tides and their higher harmonics dominate the internal …