Kai Jensen
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View article: Global change pattern of sedimentary nitrogen isotope during the Anthropocene epoch
Global change pattern of sedimentary nitrogen isotope during the Anthropocene epoch Open
Nitrogen (N) cycling has been reshaped during the Anthropocene epoch, yet the global change pattern of sedimentary N stable isotope (δ15N) remains unclear. Previous research has mainly focused on changes of sedimentary δ15N in remote areas…
View article: Hydrology masks warming effects on microbial communities in salt marsh soils
Hydrology masks warming effects on microbial communities in salt marsh soils Open
Soil microbial communities play a pivotal role in salt marsh ecosystem functioning, driving processes such as organic matter decomposition and greenhouse gas cycling. Despite their importance, it remains unclear how climate warming will af…
View article: Targeting the untargeted: Uncovering the chemical complexity of root exudates
Targeting the untargeted: Uncovering the chemical complexity of root exudates Open
While the metabolic composition of root exudates is potentially decisive for understanding plant–microbe interactions and the role of ecosystems as carbon sinks, technical constraints continue to hinder a comprehensive understanding of the…
View article: Soil Organic Carbon Stocks of German Salt Marshes: A Comparative Study Along Low‐ and High‐Energy Coastlines
Soil Organic Carbon Stocks of German Salt Marshes: A Comparative Study Along Low‐ and High‐Energy Coastlines Open
Blue carbon ecosystems, such as salt marshes, store comparably large amounts of organic carbon in their soils and function more effectively as carbon sinks than most other terrestrial ecosystems. Here we provide the first comprehensive stu…
View article: Hydrology mediates salt marsh belowground biomass response to warming
Hydrology mediates salt marsh belowground biomass response to warming Open
Salt marshes provide vital ecosystem services, including coastal protection and carbon sequestration. Roots play a key role in delivering these ecosystem services, as they stabilize soils and contribute to organic carbon accumulation. This…
View article: Soil organic carbon stocks and stabilization mechanisms in tidal marshes along estuarine gradients
Soil organic carbon stocks and stabilization mechanisms in tidal marshes along estuarine gradients Open
Tidal marshes in estuaries store large amounts of soil organic carbon (SOC) and are dominated by the interaction of tidal inundation and salinity with biotic ecosystem components, leading to strong spatio-temporal heterogeneity. Little is …
View article: When Genetic Diversity Is Low: The Effects of Ploidy Level on Plant Functional Trait Expression in <i>Spartina</i> Under Global Change
When Genetic Diversity Is Low: The Effects of Ploidy Level on Plant Functional Trait Expression in <i>Spartina</i> Under Global Change Open
Whole genome duplication (WGD or polyploidization) events shape plant evolution, altering ecological responses and plant traits, particularly those related to cell and tissue size. We studied genetic diversity and phenotypic plasticity in …
View article: Litter decomposition and prokaryotic decomposer communities along estuarine gradients
Litter decomposition and prokaryotic decomposer communities along estuarine gradients Open
View article: Root-Driven Soil Reduction in Wadden Sea Salt Marshes
Root-Driven Soil Reduction in Wadden Sea Salt Marshes Open
The soil redox potential in wetlands such as peatlands or salt marshes exerts a strong control over microbial decomposition processes and consequently soil carbon cycling. Wetland plants can influence redox by supplying both terminal elect…
View article: Targeting the untargeted: Uncovering the chemical complexity of root exudates
Targeting the untargeted: Uncovering the chemical complexity of root exudates Open
The chemical complexity of root exudates has garnered significant attention in recent years, yet critical gaps remain in understanding the full scope of root exudate chemical variation across the plant kingdom. To address this, we conducte…
View article: Soil organic carbon stocks and stabilization mechanisms in tidal marshes along estuarine gradients
Soil organic carbon stocks and stabilization mechanisms in tidal marshes along estuarine gradients Open
Tidal marshes store large amounts of soil organic carbon (SOC), however, little is known on SOC stabilization mechanisms in these ecosystems. In estuarine marshes, SOC storage is dominated by a complex interaction of tidal inundation and s…
View article: Partitioning biota along the Elbe River estuary: where are the community transitions?
Partitioning biota along the Elbe River estuary: where are the community transitions? Open
Estuarine zonation and community assemblages are frequently correlated with salinity, although the extent or nature of this correlation varies considerably among the published studies. While a smooth transition in biological communities is…
View article: Do citizens value climate change mitigation over biodiversity protection? Exploring citizen support for salt marsh management
Do citizens value climate change mitigation over biodiversity protection? Exploring citizen support for salt marsh management Open
View article: Harmonization of Nordic coastal marsh habitat classification benefits conservation and management
Harmonization of Nordic coastal marsh habitat classification benefits conservation and management Open
View article: Plant‐sediment interactions decouple inorganic from organic carbon stock development in salt marsh soils
Plant‐sediment interactions decouple inorganic from organic carbon stock development in salt marsh soils Open
The storage of organic carbon in the soils of salt marshes and other coastal blue carbon ecosystems has gained considerable attention by the scientific community for more than a decade now, while the relevance and mechanisms of soil inorga…
View article: Wetland roots as soil reducers – Insights from a Wadden Sea salt-marsh study
Wetland roots as soil reducers – Insights from a Wadden Sea salt-marsh study Open
The redox potential in wetland soils exerts strong control over microbial decomposition and consequently carbon cycling. Wetland plants influence redox by supplying both terminal electron acceptors (i.e. oxygen) and electron donors (i.e. o…
View article: Design and Assessment of a Novel Approach for Ecosystem Warming Experiments in High‐Energy Tidal Wetlands
Design and Assessment of a Novel Approach for Ecosystem Warming Experiments in High‐Energy Tidal Wetlands Open
Coastal salt marshes have an important role in climate change adaptation and mitigation. Direct and indirect responses to warming are expected to vary along the marsh elevation gradient, making ecosystem responses to warming at this marine…
View article: Warming experiment indicates that increasing global temperatures may not affect windows of opportunity for salt marsh seedlings
Warming experiment indicates that increasing global temperatures may not affect windows of opportunity for salt marsh seedlings Open
With increasing global temperatures, it remains unclear, how seedling emergence and survival will be affected in highly dynamic ecosystems like salt marshes. Our study combines passive and active warming treatments with the natural inundat…
View article: Warming accelerates belowground litter turnover in salt marshes – insights from a Tea Bag Index study
Warming accelerates belowground litter turnover in salt marshes – insights from a Tea Bag Index study Open
Salt marshes play an important role in the global carbon cycle due to the large amount of organic carbon stored in their soils. Soil organic carbon formation in these coastal wetland ecosystems is strongly controlled by the plant primary p…
View article: Improving patient satisfaction for patients with acute neurological symptoms by increased flow from the front door of hospital and more specific documentation in medical record notes: a quality improvement project
Improving patient satisfaction for patients with acute neurological symptoms by increased flow from the front door of hospital and more specific documentation in medical record notes: a quality improvement project Open
Patient experience is considered essential in evaluating healthcare quality. One of the most important parameters that influence patient satisfaction is perception of throughput time, defined as the time from hospital entrance to time of d…
View article: Species-specific and seasonal differences in the resistance of salt-marsh vegetation to wave impact
Species-specific and seasonal differences in the resistance of salt-marsh vegetation to wave impact Open
The coastal protection function provided by the vegetation of tidal wetlands (e.g. salt marshes) will play an important role in defending coastlines against storm surges in the future and depend on how these systems respond to such forcing…
View article: Comment on bg-2022-189
Comment on bg-2022-189 Open
Abstract. Salt marshes play an important role in the global carbon (C) cycle due to the large amount of C stored in their soils. Soil C input in these coastal wetland ecosystems is strongly controlled by the production and…
View article: Effects of small-scale patterns of vegetation structure on suspended sediment concentration and sediment deposition in a salt marsh
Effects of small-scale patterns of vegetation structure on suspended sediment concentration and sediment deposition in a salt marsh Open
Salt marshes contribute to coastal protection by attenuating waves and reducing flow velocities. Nevertheless, coastal salt marshes are threatened by rising sea levels. In order to keep pace with rising sea levels, salt marshes need to gro…
View article: Warming accelerates belowground litter turnover in salt marshes – insights from a Tea Bag Index assay
Warming accelerates belowground litter turnover in salt marshes – insights from a Tea Bag Index assay Open
Salt marshes play an important role in the global carbon (C) cycle due to the large amount of C stored in their soils. Soil C input in these coastal wetland ecosystems is strongly controlled by the production and initial decomposition rate…
View article: Droughts decrease and floods increase carbon sequestration rates of Quercus robur in hardwood floodplain forests
Droughts decrease and floods increase carbon sequestration rates of Quercus robur in hardwood floodplain forests Open
Trees can contribute to the reduction of atmospheric CO2 concentrations, but they do so at varying rates. The carbon sequestration rate (CSR) of trees is influenced by many factors including tree age, forest density, site conditions, and e…
View article: Flooding Effect on Rhizosphere Processes in Salt Marsh Plants: Visualizing Spatio-temporal Dynamics of O2 and CO2 using Planar Optodes
Flooding Effect on Rhizosphere Processes in Salt Marsh Plants: Visualizing Spatio-temporal Dynamics of O2 and CO2 using Planar Optodes Open
<p>Tidal marshes are vegetated coastal ecosystems that are heavily influenced by estuarine gradients such as tidal inundation and salinity. The sequestration potential of these blue carbon ecosystems relies on the balance between the…
View article: A dynamic local-scale vegetation model for lycopsids (LYCOm v1.0)
A dynamic local-scale vegetation model for lycopsids (LYCOm v1.0) Open
Lycopsids represent a distinct lineage of vascular plants with a long evolutionary history including numerous extant and extinct species that started out as tiny herbaceous plants and later went on to grow into forests with tree-like struc…
View article: Fine root mortality under severe drought reflects different root distribution of Quercus robur and Ulmus laevis trees in hardwood floodplain forests
Fine root mortality under severe drought reflects different root distribution of Quercus robur and Ulmus laevis trees in hardwood floodplain forests Open
Key message Extremely high fine root mortalities were observed under drought in 2018, increasing fine root mortality in young trees could be explained by differences in root distribution compared to old trees. Abstract Juvenile trees in fl…
View article: Adapting a Quercus robur allometric equation to quantify carbon sequestration rates on the Middle Elbe floodplain
Adapting a Quercus robur allometric equation to quantify carbon sequestration rates on the Middle Elbe floodplain Open
View article: Droughts Decrease and Floods Increase Carbon Sequestration Rates of Quercus Robur in Hardwood Floodplain Forests
Droughts Decrease and Floods Increase Carbon Sequestration Rates of Quercus Robur in Hardwood Floodplain Forests Open