Lars Stemmann
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View article: Assessment of Plankton Size Structure From CMIP6 Earth System Models With a Novel Pelagic Size Structure Database
Assessment of Plankton Size Structure From CMIP6 Earth System Models With a Novel Pelagic Size Structure Database Open
Plankton community structure influences biogeochemical and ecosystem processes, such as sequestration of atmospheric CO 2 , carbon export to the ocean floor, and the productivity of higher trophic levels. One means of analyzing community s…
View article: A global consistent database of plankton and detritus from in situ imaging by the Underwater Vision Profiler 5
A global consistent database of plankton and detritus from in situ imaging by the Underwater Vision Profiler 5 Open
Plankton and detritus are essential components of the Earth’s oceans influencing biogeochemical cycles and carbon sequestration. Climate change impacts their composition and marine ecosystems as a whole. To improve our understanding of the…
View article: Marine snow morphology drives sinking and attenuation in the ocean interior
Marine snow morphology drives sinking and attenuation in the ocean interior Open
Simultaneous measurements of marine snow (particles larger than 600 µm) morphologies, estimates of their in situ sinking speeds, and midwater attenuation in export plumes were performed for the first time using a biogeochemical (BGC)-Argo …
View article: A Lagrangian perspective reveals the carbon and oxygen budget of an oceanic eddy
A Lagrangian perspective reveals the carbon and oxygen budget of an oceanic eddy Open
View article: Particle production by mesopelagic fauna enhances deep-ocean carbonsequestration
Particle production by mesopelagic fauna enhances deep-ocean carbonsequestration Open
Oceanic carbon sequestration via the biological pump operates through two main export pathways: gravitational sinking of particulate organic carbon (POC) from the surface and injection at depth by migrating fauna. Where the exported POC re…
View article: Intense and localized export of selected marine snow types at eddy edges in the South Atlantic Ocean
Intense and localized export of selected marine snow types at eddy edges in the South Atlantic Ocean Open
The biological carbon pump (BCP) comprises a wide variety of processes involved in transferring organic carbon from the surface to the deep ocean. This results in long-term carbon sequestration. Without the BCP, atmospheric CO2 concentrati…
View article: Pathways for converting zooplankton traits to ecological insights are paved with findable, accessible, interoperable, and reusable (FAIR) data practices
Pathways for converting zooplankton traits to ecological insights are paved with findable, accessible, interoperable, and reusable (FAIR) data practices Open
The use of trait-based approaches and trait data in zooplankton ecology is rapidly growing to better understand and predict the patterns of zooplankton distributions and their role in aquatic ecosystems and biogeochemical cycles. Although …
View article: Marine snow morphology drives sinking and attenuation in the ocean interior
Marine snow morphology drives sinking and attenuation in the ocean interior Open
Simultaneous measurements of marine snow (particles larger than 600 µm) morphologies, estimates of their in situ sinking speeds and midwater attenuation in export plumes were performed for the first time using a BGC-Argo float equipped wit…
View article: Supplementary material to "Marine snow morphology drives sinking and attenuation in the ocean interior"
Supplementary material to "Marine snow morphology drives sinking and attenuation in the ocean interior" Open
View article: Marine snow surface production and bathypelagic export at the Equatorial Atlantic from an imaging float
Marine snow surface production and bathypelagic export at the Equatorial Atlantic from an imaging float Open
The marine biological carbon pump (BCP) plays a central role in the global carbon cycle, transporting carbon from the surface to the deep ocean and sequestering it for long periods. Sinking of surface-produced particles, known as the Biolo…
View article: Supplementary material to "Marine snow surface production and bathypelagic export at the Equatorial Atlantic from an imaging float"
Supplementary material to "Marine snow surface production and bathypelagic export at the Equatorial Atlantic from an imaging float" Open
View article: Oceanographic features boost latitudinal patterns in copepod body size distribution in the South Atlantic
Oceanographic features boost latitudinal patterns in copepod body size distribution in the South Atlantic Open
The South Atlantic Ocean (SAO) is an under‐sampled ocean where the influence of environmental drivers on copepod body size is poorly understood. This study investigated the body size distribution of copepods from 13°S to 64°S to test Bergm…
View article: Massive and localized export of selected marine snow types at eddy edges in the South Atlantic Ocean
Massive and localized export of selected marine snow types at eddy edges in the South Atlantic Ocean Open
The open ocean plays a critical role in mitigating climate change by sequestering carbon dioxide (CO2) from the atmosphere for long periods of time. This carbon storage occurs over decades to millennia and relies on the physical pump that …
View article: First release of the Pelagic Size Structure database: global datasets of marine size spectra obtained from plankton imaging devices
First release of the Pelagic Size Structure database: global datasets of marine size spectra obtained from plankton imaging devices Open
In marine ecosystems, most physiological, ecological, or physical processes are size dependent. These include metabolic rates, the uptake of carbon and other nutrients, swimming and sinking velocities, and trophic interactions, which event…
View article: Global census of the significance of giant mesopelagic protists to the marine carbon and silicon cycles
Global census of the significance of giant mesopelagic protists to the marine carbon and silicon cycles Open
View article: A Pelagic Size Structure database (PSSdb) to support biogeochemical modeling: third update to first release of PSSdb-bulk
A Pelagic Size Structure database (PSSdb) to support biogeochemical modeling: third update to first release of PSSdb-bulk Open
This dataset represents the third update to the first release of the Pelagic Size Structure database (PSSdb, https://pssdb.net) scientific project, investigating the global particle size distributions measured from multiple pelagicǂ imagin…
View article: Key link between iron and the size structure of three main mesoplanktonic groups (Crustaceans, Rhizarians, and colonial N<sub>2</sub>-fixers) in the Upper Ocean
Key link between iron and the size structure of three main mesoplanktonic groups (Crustaceans, Rhizarians, and colonial N<sub>2</sub>-fixers) in the Upper Ocean Open
In marine ecosystems, critical services like fish production, carbon export, or the delivery of nutrients through N 2 -fixation rely heavily on the size spectrum of pelagic organisms, particularly mesoplankton (200-20,000 µm). However, how…
View article: Comment on essd-2023-479
Comment on essd-2023-479 Open
Abstract. In marine ecosystems, most physiological, ecological, or physical processes are size-dependent. These include metabolic rates, uptake of carbon and other nutrients, swimming and sinking velocities, and trophic in…
View article: Ubiquity of inverted ’gelatinous’ ecosystem pyramids in the global ocean
Ubiquity of inverted ’gelatinous’ ecosystem pyramids in the global ocean Open
Summary paragraph Plankton are essential in marine ecosystems. However, our knowledge of overall community structure is sparse due to inconsistent sampling across their very large organismal size range. Here we use diverse imaging methods …
View article: First release of the Pelagic Size Structure database: Global datasets of marine size spectra obtained from plankton imaging devices
First release of the Pelagic Size Structure database: Global datasets of marine size spectra obtained from plankton imaging devices Open
In marine ecosystems, most physiological, ecological, or physical processes are size-dependent. These include metabolic rates, uptake of carbon and other nutrients, swimming and sinking velocities, and trophic interactions, which eventuall…
View article: A Pelagic Size Structure database (PSSdb) to support biogeochemical modeling: update to first release
A Pelagic Size Structure database (PSSdb) to support biogeochemical modeling: update to first release Open
This dataset is an update to the first release of the Pelagic Size Structure database (PSSdb, https://pssdb.net) scientific project, investigating the global particle size distributions measured from multiple pelagicǂ imaging systems. Thes…
View article: Predicting global distributions of eukaryotic plankton communities from satellite data
Predicting global distributions of eukaryotic plankton communities from satellite data Open
Satellite remote sensing is a powerful tool to monitor the global dynamics of marine plankton. Previous research has focused on developing models to predict the size or taxonomic groups of phytoplankton. Here, we present an approach to ide…
View article: A global census of the significance of giant mesopelagic protists to the biogeochemical cycles of carbon and silicon
A global census of the significance of giant mesopelagic protists to the biogeochemical cycles of carbon and silicon Open
Data and scripts used for the paper 'A global census of the significance of giant mesopelagic protists to the biogeochemical cycles of carbon and silicon' authored by: Manon Laget, Laetitia Drago, Thelma Panaïotis, Rainer …
View article: Ocean-wide comparisons of mesopelagic planktonic community structures
Ocean-wide comparisons of mesopelagic planktonic community structures Open
For decades, marine plankton have been investigated for their capacity to modulate biogeochemical cycles and provide fishery resources. Between the sunlit (epipelagic) layer and the deep dark waters, lies a vast and heterogeneous part of t…
View article: Three major mesoplanktonic communities resolved by in situ imaging in the upper 500 m of the global ocean
Three major mesoplanktonic communities resolved by in situ imaging in the upper 500 m of the global ocean Open
Aim The distribution of mesoplankton communities has been poorly studied at global scale, especially from in situ instruments. This study aims to (1) describe the global distribution of mesoplankton communities in relation to their environ…
View article: Complete zooplankton size spectra re-constructed from « in situ » imaging and Multinet data in the global ocean
Complete zooplankton size spectra re-constructed from « in situ » imaging and Multinet data in the global ocean Open
Plankton size spectra are important indicators of the ecosystem state, as they illustrate the quantity of organisms available for higher marine food web and reflect multiple size-dependent processes. Yet, such measurements are typically bi…
View article: A Lagrangian perspective on the carbon and oxygen budget of an oceanic eddy
A Lagrangian perspective on the carbon and oxygen budget of an oceanic eddy Open
Quantifying the ocean's ability to sequester atmospheric carbon is essential in a climate change context. Measurements of carbon exported to the mesopelagic seldom balance the carbon demand or the oxygen consumption there, suggesting the p…
View article: A Pelagic Size Structure database (PSSdb) to support biogeochemical modeling: first release
A Pelagic Size Structure database (PSSdb) to support biogeochemical modeling: first release Open
This dataset represents the first release of the Pelagic Size Structure database (PSSdb, https://pssdb.net) scientific project, investigating the global particle size distributions measured from multiple pelagicǂ imaging systems. These dev…
View article: New Estimate of Organic Carbon Export From Optical Measurements Reveals the Role of Particle Size Distribution and Export Horizon
New Estimate of Organic Carbon Export From Optical Measurements Reveals the Role of Particle Size Distribution and Export Horizon Open
Export of sinking particles from the surface ocean is critical for carbon sequestration and to provide energy to the deep biosphere. The magnitude and spatial patterns of this export have been estimated in the past by in situ particle flux…
View article: Monitoring and modelling marine zooplankton in a changing climate
Monitoring and modelling marine zooplankton in a changing climate Open