André Freiwald
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View article: First assessment of blue carbon stocks, sequestration rates and potential sources since 1900 at Arguin Island (Mauritania)
First assessment of blue carbon stocks, sequestration rates and potential sources since 1900 at Arguin Island (Mauritania) Open
Global blue carbon assessments are hindered by a lack of data from understudied seagrass regions, such as those of Western Africa. This study reports the first in situ records of organic carbon (OC) stocks and burial rates for seagrass bed…
View article: Annotated checklist of the marine ichthyofauna of Mauritania from shallow-water habitats and artisanal fish markets
Annotated checklist of the marine ichthyofauna of Mauritania from shallow-water habitats and artisanal fish markets Open
Due to their location in a strong upwelling area, Mauritanian waters are one of the most nutrient‑rich and productive areas in the eastern Atlantic Ocean. On the Mauritanian coast, a remarkably high biodiversity consisting of tropica…
View article: Continuous optical chlorophyll-a and turbidity data along RV SONNE cruise SO309
Continuous optical chlorophyll-a and turbidity data along RV SONNE cruise SO309 Open
Underway optical chlorophyll-a and turbidity data were collected along the cruise track with Sea-Bird Scientific ECO FLNTU sensors installed within two autonomous measurement systems, called self-cleaning monitoring boxes (SMBs). The SMBs …
View article: <i>Gaidropsarus mauritanicus</i> (<scp>Gadiformes, Gaidropsaridae</scp>) a new three‐bearded rockling from a deep‐water coral ecosystem with a genetically verified biogeographical distribution of the genus and notes to its ecology and behavior
<i>Gaidropsarus mauritanicus</i> (<span>Gadiformes, Gaidropsaridae</span>) a new three‐bearded rockling from a deep‐water coral ecosystem with a genetically verified biogeographical distribution of the genus and notes to its ecology and behavior Open
Gaidropsarus mauritanicus sp. nov. is described from one specimen collected using a grab sample from the Tanoûdêrt Canyon (ca. 20° N) off Mauritania at a depth of 595 m. The new species was further observed during eight remotely operated v…
View article: Review of the Central and South Atlantic Shelf and Deep-Sea Benthos: Science, Policy, and Management
Review of the Central and South Atlantic Shelf and Deep-Sea Benthos: Science, Policy, and Management Open
128 129The Central and South Atlantic represents a vast ocean area and is home to a diverse range of ecosystems and species. Nevertheless, and similar to the rest of the global south, the area is comparatively understudied yet exposed to i…
View article: The dispersal capacity of Mollusca - a test on the South Azorean Seamount Chain - supplementary material
The dispersal capacity of Mollusca - a test on the South Azorean Seamount Chain - supplementary material Open
This study investigates the molluscan fauna of the South Azorean seamount chain (SASC), which comprises several seamounts culminating in 300-1600 m depth, separated by distances less than 200 km. Material was collected mainly by dredging a…
View article: The dispersal capacity of Mollusca - a test on the South Azorean Seamount Chain - supplementary material
The dispersal capacity of Mollusca - a test on the South Azorean Seamount Chain - supplementary material Open
This study investigates the molluscan fauna of the South Azorean seamount chain (SASC), which comprises several seamounts culminating in 300-1600 m depth, separated by distances less than 200 km. Material was collected mainly by dredging a…
View article: Cold-water coral framework architecture is selectively shaped by bottom current flow
Cold-water coral framework architecture is selectively shaped by bottom current flow Open
The three-dimensional (3D) structure of habitat-forming corals has profound impacts on reef ecosystem processes. Elucidating coral structural responses to the environment is therefore crucial to understand changes in these ecosystems. Howe…
View article: New species and new records in Cerithiopsidae and Newtoniellidae (Triphoroidea, Gastropoda) from the Azores and the South Azorean Seamount Chain
New species and new records in Cerithiopsidae and Newtoniellidae (Triphoroidea, Gastropoda) from the Azores and the South Azorean Seamount Chain Open
This study is part of a broader inventory of bathyal molluscs from the Azores and South Azorean Seamount Chain. Herein a review was completed on taxa in the families Cerithiopsidae and Newtoniellidae, mostly represented in our material by …
View article: The Mauritanian Slope (NE Atlantic) Has No Desert:<i>Swiftia phaeton</i>(Holaxonia: Plexauridae) Shaping Coral Gardens
The Mauritanian Slope (NE Atlantic) Has No Desert:<i>Swiftia phaeton</i>(Holaxonia: Plexauridae) Shaping Coral Gardens Open
Swiftia Duchassaing & Michelotti, 1864, is often found sparse in the NE Atlantic Ocean and Mediterranean Sea. When the cruise MSM 16/3 “PHAETON” filmed the upper bathyal off Mauritania in 2010, the first dense populations dominated by Swif…
View article: A new amphipod species of the bathyal genus Dautzenbergia Chevreux, 1900 (Amphipoda, Calliopioidea, Pontogeneiidae) associated with cold-water corals off Angola
A new amphipod species of the bathyal genus Dautzenbergia Chevreux, 1900 (Amphipoda, Calliopioidea, Pontogeneiidae) associated with cold-water corals off Angola Open
A new species of pontogeneiid amphipod, Dautzenbergia concavipalma sp. nov., is described from cold-water corals off Angola. This is only the second observation of this genus in the South Atlantic. Important morphological characters in com…
View article: Anatoma occidentalis n. sp. (Vetigastropoda, Anatomidae) from upper bathyal coral habitats off western Africa
Anatoma occidentalis n. sp. (Vetigastropoda, Anatomidae) from upper bathyal coral habitats off western Africa Open
A new species in the family Anatomidae J. H. McLean, 1989 (Gastropoda) is proposed: Anatoma occidentalis n. sp., found off Mauritania and Angola. Empty shells of the new species were found in sediment samples collected in habitats associat…
View article: Corals - Habitat Formers in the Anthropocene
Corals - Habitat Formers in the Anthropocene Open
Corals have thrived on the bottom of the ocean for millions of years. These fascinating animals are currently forced to cope with the rapid changes caused by humans to avoid extinction. How are corals changing their way of processing energ…
View article: A new octocoral species of Swiftia (Holaxonia, Plexauridae) from the upper bathyal off Mauritania (NE Atlantic)
A new octocoral species of Swiftia (Holaxonia, Plexauridae) from the upper bathyal off Mauritania (NE Atlantic) Open
Three species of the genus Swiftia are known for the NE Atlantic Ocean and Mediterranean Sea. Remotely-operated vehicle (ROV) surveys and sampling on board RV Maria S. Merian during cruise MSM 16/3 ‘PHAETON’ in 2010 provided footage and sp…
View article: A review of Atlantic deep-water species in the genus Talassia (Caenogastropoda, Vanikoridae)
A review of Atlantic deep-water species in the genus Talassia (Caenogastropoda, Vanikoridae) Open
A review was done on all species of the genus Talassia (family Vanikoridae Gray, 1840), which are known from an upper bathyal depth range in the Atlantic Ocean. Four new species are proposed: Talassia mexicana sp. nov. from the Gulf of Mex…
View article: Ichnodiversity in the eastern Canadian Arctic in the context of polar microbioerosion patterns
Ichnodiversity in the eastern Canadian Arctic in the context of polar microbioerosion patterns Open
Studies of marine microbioerosion in polar environments are scarce. They include our recent investigations of bioerosion traces preserved in sessile balanid skeletons from the Arctic Svalbard archipelago and the Antarctic Ross Sea. Here, w…
View article: High‐resolution imaging sheds new light on a multi‐tier symbiotic partnership between a “walking” solitary coral, a sipunculan, and a bivalve from East Africa
High‐resolution imaging sheds new light on a multi‐tier symbiotic partnership between a “walking” solitary coral, a sipunculan, and a bivalve from East Africa Open
Marine symbioses are integral to the persistence of ecosystem functioning in coral reefs. Solitary corals of the species Heteropsammia cochlea and Heterocyathus aequicostatus have been observed to live in symbiosis with the sipunculan worm…
View article: 3D models and morphological data of Desmophyllum pertusum colony samples
3D models and morphological data of Desmophyllum pertusum colony samples Open
Skeletal colony fragments of the deep-water coral Desmophyllum pertusum were digitized using the 3D surface scanner Artec Space Spider with the software Artec Studio 15. Multiple individual scans of each specimen were assembled through Aut…
View article: 3D models and morphological data of Desmophyllum pertusum colony samples
3D models and morphological data of Desmophyllum pertusum colony samples Open
Skeletal colony fragments of the deep-water coral Desmophyllum pertusum were digitized using the 3D surface scanner Artec Space Spider with the software Artec Studio 15. Multiple individual scans of each specimen were assembled through Aut…
View article: Deciphering the composite morphological diversity of<i>Lophelia pertusa</i>, a cosmopolitan deep‐water ecosystem engineer
Deciphering the composite morphological diversity of<i>Lophelia pertusa</i>, a cosmopolitan deep‐water ecosystem engineer Open
Cold‐water coral reefs constitute important biodiversity hotspots in aphotic waters around the world. The complex, highly variable morphology of the reef habitat‐forming species has important implications for the communities they harbor an…
View article: Bathyal species in Rissoidae (Gastropoda) from Azorean seamounts
Bathyal species in Rissoidae (Gastropoda) from Azorean seamounts Open
Three new species in the family Rissoidae (Gastropoda) have been found in bioclastic sediment samples taken on the bathyal slopes of two Azorean seamount areas during the cruise M151 Athena by R/V Meteor: Alvania templadoi n. sp., Crisilla…
View article: ‘Ten Years After’—a long‐term settlement and bioerosion experiment in an Arctic rhodolith bed (Mosselbukta, Svalbard)
‘Ten Years After’—a long‐term settlement and bioerosion experiment in an Arctic rhodolith bed (Mosselbukta, Svalbard) Open
Rhodolith beds and bioherms formed by ecosystem engineering crustose coralline algae support the northernmost centres of carbonate production, referred to as polar cold‐water carbonate factories. Yet, little is known about biodiversity and…
View article: Host-influenced geochemical signature in the parasitic foraminifera <i>Hyrrokkin sarcophaga</i>
Host-influenced geochemical signature in the parasitic foraminifera <i>Hyrrokkin sarcophaga</i> Open
Hyrrokkin sarcophaga is a parasitic foraminifera that is commonly found in cold-water coral reefs where it infests the file clam Acesta excavata and the scleractinian coral Desmophyllum pertusum (formerly known as Lophelia pertusa). Here, …
View article: The genus Anatoma Woodward, 1859 (Gastropoda, Anatomidae) from Azorean seamounts
The genus Anatoma Woodward, 1859 (Gastropoda, Anatomidae) from Azorean seamounts Open
Four species in the genus Anatoma Woodward, 1859 were found in bioclastic sediment samples taken on the bathyal slopes of seven Azorean seamounts during the cruises SEAMOUNT 2 by R/V LE SUROIT and M151 ATHENA by R/V METEOR. Three new speci…
View article: Exploring confocal laser scanning microscopy (CLSM) and fluorescence staining as a tool for imaging and quantifying traces of marine microbioerosion and their trace‐making microendoliths
Exploring confocal laser scanning microscopy (CLSM) and fluorescence staining as a tool for imaging and quantifying traces of marine microbioerosion and their trace‐making microendoliths Open
Microscopic organisms that penetrate calcareous structures by actively dissolving the carbonate matrix, namely microendoliths, have an important influence on the breakdown of marine carbonates. The study of these microorganisms and the bio…