Morten Larsen
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View article: Imaging the snorkel effect during submerged germination in rice: Oxygen supply via the coleoptile triggers seminal root emergence underwater
Imaging the snorkel effect during submerged germination in rice: Oxygen supply via the coleoptile triggers seminal root emergence underwater Open
Submergence during germination impedes aerobic metabolisms and limits the growth of most higher plants. However, some wetland plants including rice can germinate under submerged conditions. It has long been hypothesized that the first elon…
View article: Anammox bacteria drive fixed nitrogen loss in hadal trench sediments
Anammox bacteria drive fixed nitrogen loss in hadal trench sediments Open
Significance Hadal trenches represent the deepest part of the oceans, apparently offering adverse conditions for life, given their high hydrostatic pressure and wide separation from the productive surface waters. However, focusing of react…
View article: Oxygen production by an ammonia-oxidizing archaeon
Oxygen production by an ammonia-oxidizing archaeon Open
Ammonia-oxidizing archaea (AOA) are one of the most abundant groups of microbes in the world’s oceans and are key players in the nitrogen cycle. Their energy metabolism, the oxidation of ammonia to nitrite, requires oxygen. Nevertheless, A…
View article: Spatial variability of prokaryotic and viral abundances in the Kermadec and Atacama Trench regions
Spatial variability of prokaryotic and viral abundances in the Kermadec and Atacama Trench regions Open
Hadal trenches represent the deepest part of the ocean and are dynamic depocenters with intensified prokaryotic activity. Here, we explored the distribution and drivers of prokaryotic and viral abundance from the ocean surface and 40 cm in…
View article: Hadal trenches are dynamic hotspots for early diagenesis in the deep sea
Hadal trenches are dynamic hotspots for early diagenesis in the deep sea Open
The deepest part of the global ocean, hadal trenches, are considered to act as depocenters for organic material. Relatively high microbial activity has been demonstrated in the deepest sections of some hadal trenches, but the deposition dy…
View article: Behavioural patterns of the soft-shell clam Mya arenaria: implications for benthic oxygen and nitrogen dynamics
Behavioural patterns of the soft-shell clam Mya arenaria: implications for benthic oxygen and nitrogen dynamics Open
It is well established that benthic infauna alter sediment biogeochemistry, but the importance of their behavioural patterns in biogeochemical processes has only recently been fully appreciated. Using arrays of O2 microoptodes, siphon imag…
View article: Spatial heterogeneity and short‐term oxygen dynamics in the rhizosphere of <i>Vallisneria spiralis</i>: Implications for nutrient cycling
Spatial heterogeneity and short‐term oxygen dynamics in the rhizosphere of <i>Vallisneria spiralis</i>: Implications for nutrient cycling Open
Aquatic macrophytes modify the sediment biogeochemistry via radial oxygen loss ( ROL ) from their roots. However, the variation in ROL and its implication for nutrient availability remains poorly explored. Here, we use planar O 2 optodes t…
View article: The last common ancestor of animals lacked the HIF pathway and respired in low-oxygen environments
The last common ancestor of animals lacked the HIF pathway and respired in low-oxygen environments Open
Animals have a carefully orchestrated relationship with oxygen. When exposed to low environmental oxygen concentrations, and during periods of increased energy expenditure, animals maintain cellular oxygen homeostasis by enhancing internal…
View article: Author response: The last common ancestor of animals lacked the HIF pathway and respired in low-oxygen environments
Author response: The last common ancestor of animals lacked the HIF pathway and respired in low-oxygen environments Open
Article Figures and data Abstract eLife digest Introduction Results Discussion Materials and methods Data availability References Decision letter Author response Article and author information Metrics Abstract Animals have a carefully orch…
View article: In situ quantification of ultra‐low O <sub>2</sub> concentrations in oxygen minimum zones: Application of novel optodes
In situ quantification of ultra‐low O <sub>2</sub> concentrations in oxygen minimum zones: Application of novel optodes Open
Conventional sensors for the quantification of O2 availability in aquatic environments typically have limits of detection (LOD) of > 1 μmol L−1 and do not have sufficient resolution to reliably measure concentrations in strongly O2 deplete…