Eero Asmala
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View article: Land use as a key driver of increased organic carbon burial in boreal lakes
Land use as a key driver of increased organic carbon burial in boreal lakes Open
The abundant lakes in the boreal region are an active zone for cycling of organic carbon (OC), functioning as simultaneous sources and sinks of atmospheric carbon dioxide. While previous studies have documented increased OC loading and acc…
View article: Effects of phytoplankton species distribution on particulate organic carbon dynamics along a coastal gradient
Effects of phytoplankton species distribution on particulate organic carbon dynamics along a coastal gradient Open
Phytoplankton communities affect carbon dynamics worldwide, strongly influencing the quality and quantity of organic carbon in coastal ecosystems. Yet, we still know little about the impacts of changing phytoplankton community composition …
View article: Optical transformation of riverine colored dissolved organic matter during salt-induced flocculation
Optical transformation of riverine colored dissolved organic matter during salt-induced flocculation Open
Flocculation of riverine dissolved organic matter (DOM) in estuaries is crucial for transforming and removing terrestrial carbon inputs across the land-to-ocean aquatic continuum. We measured variations in chromophoric DOM (CDOM) absorptio…
View article: Changes in riverine dissolved organic matter caused by gypsum‐induced flocculation
Changes in riverine dissolved organic matter caused by gypsum‐induced flocculation Open
Gypsum (CaSO 4 ·2H 2 O) is increasingly used to bind P to soil on agricultural fields, which mitigates eutrophication caused by runoff of excess PO 4 3− fertilizers into adjacent aquatic environments. Gypsum also binds dissolved organic ma…
View article: Microbially Enhanced Growth and Metal Capture by Ferromanganese Concretions in a Laboratory Experiment
Microbially Enhanced Growth and Metal Capture by Ferromanganese Concretions in a Laboratory Experiment Open
The growth and metal enrichment of ferromanganese minerals on the seafloor have intrigued many studies, yet the role of microbes in the process has remained elusive. Here, we assessed the microbial influence on the growth and trace metal a…
View article: Phytoplankton community composition as a driver of annual autochthonous organic carbon dynamics in the northern coastal Baltic Sea
Phytoplankton community composition as a driver of annual autochthonous organic carbon dynamics in the northern coastal Baltic Sea Open
Phytoplankton are the major primary producers in the pelagic system. They greatly influence biogeochemical cycles but little is known about the importance of shifting phytoplankton community composition for carbon dynamics. This study inve…
View article: Baltic Sea ferromanganese concretion growth rates and conditions
Baltic Sea ferromanganese concretion growth rates and conditions Open
The transition to renewable energy and the acceleration of technology demand vast amounts of hi-tech metals that are critical in green energy technology. Due to increasing demand for hi-tech metals, rising interest in mining from more unco…
View article: Persistent hot spots of <scp>CO<sub>2</sub></scp> and <scp>CH<sub>4</sub></scp> in coastal nearshore environments
Persistent hot spots of <span>CO<sub>2</sub></span> and <span>CH<sub>4</sub></span> in coastal nearshore environments Open
Nearshore environments are typically supersaturated with the potent greenhouse gases methane and carbon dioxide, due to intense remineralization of the elevated supply of organic carbon in these systems. These environments are characterize…
View article: Estuarine flocculation dynamics of organic carbon and metals from boreal acid sulfate soils
Estuarine flocculation dynamics of organic carbon and metals from boreal acid sulfate soils Open
Flocculation of riverine dissolved organic matter to the particulate form in estuaries is an important mechanism for capturing dissolved metals to newly formed organic particles, regulating the metal transport from land to sea. The process…
View article: Comment on bg-2023-53
Comment on bg-2023-53 Open
Abstract. Flocculation of riverine dissolved organic matter to the particulate form in estuaries is an important mechanism for capturing dissolved metals to newly formed organic particles, regulating the metal transport to the sea. The pro…
View article: Comment on bg-2023-53
Comment on bg-2023-53 Open
Abstract. Flocculation of riverine dissolved organic matter to the particulate form in estuaries is an important mechanism for capturing dissolved metals to newly formed organic particles, regulating the metal transport to the sea. The pro…
View article: Estuarine flocculation dynamics of organic carbon and metals from boreal acid sulphate soils
Estuarine flocculation dynamics of organic carbon and metals from boreal acid sulphate soils Open
Flocculation of riverine dissolved organic matter to the particulate form in estuaries is an important mechanism for capturing dissolved metals to newly formed organic particles, regulating the metal transport to the sea. The process is pa…
View article: Flocculation of trace metals from boreal acid sulphate soils over an estuarine gradient
Flocculation of trace metals from boreal acid sulphate soils over an estuarine gradient Open
Among the most important processes affecting the global biogeochemical cycles of carbon, nutrients and trace metals is the physicochemical transformation of terrestrial dissolved and colloidal material into suspended particles in estuaries…
View article: Fucoid brown algae inject fucoidan carbon into the ocean
Fucoid brown algae inject fucoidan carbon into the ocean Open
Brown algae annually convert gigatons of carbon dioxide into carbohydrates, including the complex extracellular matrix polysaccharide fucoidan. Due to its persistence in the environment, fucoidan is potentially a pathway for marine carbon …
View article: Dataset from a mesocosm experiment on brownification in the Baltic Sea
Dataset from a mesocosm experiment on brownification in the Baltic Sea Open
Climate change is projected to cause brownification of some coastal seas due to increased runoff of terrestrially derived organic matter. We carried out a mesocosm experiment over 15 days to test the effect of this on the planktonic ecosys…
View article: Biogeochemical functioning of the Baltic Sea
Biogeochemical functioning of the Baltic Sea Open
Location, specific topography, and hydrographic setting together with climate change and strong anthropogenic pressure are the main factors shaping the biogeochemical functioning and thus also the ecological status of the Baltic Sea. The r…
View article: Contrasting patterns of carbon cycling and dissolved organic matter processing in two phytoplankton–bacteria communities
Contrasting patterns of carbon cycling and dissolved organic matter processing in two phytoplankton–bacteria communities Open
Microbial consumption of phytoplankton-derived organic carbon in the pelagic food web is an important component of the global C cycle. We studied C cycling in two phytoplankton–bacteria systems (non-axenic cultures of a dinoflagellate Apoc…
View article: Role of particle dynamics in processing of terrestrial nitrogen and phosphorus in the estuarine mixing zone
Role of particle dynamics in processing of terrestrial nitrogen and phosphorus in the estuarine mixing zone Open
Multiple biogeochemical processes in estuaries modulate the flux of nutrients from land to sea, thus contributing to the coastal filter. The role of particle dynamics in regulating the fate of terrestrial nutrients in estuaries is poorly c…
View article: Anthropogenic Inputs of Terrestrial Organic Matter Influence Carbon Loading and Methanogenesis in Coastal Baltic Sea Sediments
Anthropogenic Inputs of Terrestrial Organic Matter Influence Carbon Loading and Methanogenesis in Coastal Baltic Sea Sediments Open
Coastal regions globally have experienced widespread anthropogenic eutrophication in recent decades. Loading of autochthonous carbon to coastal sediments enhances the demand for electron acceptors for microbial remineralization, often lead…
View article: Comment on esd-2021-33
Comment on esd-2021-33 Open
Location, specific topography and hydrographic setting together with climate change and strong anthropogenic pressure are the main factors shaping the biogeochemical functioning and thus also the ecological status of the Baltic Sea. The re…
View article: Contrasting patterns of carbon cycling and DOM processing in two phytoplankton-bacteria communities
Contrasting patterns of carbon cycling and DOM processing in two phytoplankton-bacteria communities Open
Microbial consumption of phytoplankton-derived organic carbon in the pelagic food web is an important component of the global C cycle. We studied C cycling in two phytoplankton-bacteria systems (non-axenic cultures of a dinoflagellate Apoc…
View article: Baltic Earth Assessment Report on the biogeochemistry of the Baltic Sea
Baltic Earth Assessment Report on the biogeochemistry of the Baltic Sea Open
Location, specific topography and hydrographic setting together with climate change and strong anthropogenic pressure are the main factors shaping the biogeochemical functioning and thus also the ecological status of the Baltic Sea. The re…
View article: Unraveling seasonal carbon-limitation of benthic nitrate-reduction in the coastal Baltic Sea
Unraveling seasonal carbon-limitation of benthic nitrate-reduction in the coastal Baltic Sea Open
<p>Excess bioavailable nitrogen (N) is the key driver of coastal eutrophication, thus knowledge on the fate of N in coastal systems is imperative for improving eutrophication mitigation measures. In the coastal Baltic Sea, benthic he…
View article: Identification of dissolved organic matter size components in freshwater and marine environments
Identification of dissolved organic matter size components in freshwater and marine environments Open
Dissolved organic matter (DOM) in the transition zone from freshwater to marine systems was analyzed with a new approach for parameterizing the size distribution of organic compounds. We used size‐exclusion chromatography for molecular siz…
View article: Elevated organic carbon pulses persist in estuarine environment after major storm events
Elevated organic carbon pulses persist in estuarine environment after major storm events Open
Estuaries regulate transport of dissolved organic carbon (DOC) from land to ocean. Export of terrestrial DOC from coastal watersheds is exacerbated by increasing major rainfall and storm events and human activities, leading to pulses of DO…
View article: Ubiquitous Patchiness in Chlorophyll a Concentration in Coastal Archipelago of Baltic Sea
Ubiquitous Patchiness in Chlorophyll a Concentration in Coastal Archipelago of Baltic Sea Open
Productivity and trophic status of aquatic systems is traditionally quantified by chlorophyll a measurements. Environmental conditions and ecological interactions cause variability in chlorophyll a abundance. In coastal ecosystems, shallow…