Search Results - "Sand‐Jensen, Kaj"

More is less: net gain in species richness, but biotic homogenization over 140 years by Finderup Nielsen, Tora, Sand‐Jensen, Kaj, Dornelas, Maria, Bruun, Hans Henrik, Fukami, Tadashi

“…While biodiversity loss continues globally, assessments of regional and local change over time have been equivocal. Here, we assess changes in plant species…”
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Century‐long records reveal shifting challenges to seagrass recovery by Krause‐Jensen, Dorte, Duarte, Carlos M., Sand‐Jensen, Kaj, Carstensen, Jacob

“…Global losses over the 20th century placed seagrass ecosystems among the most threatened ecosystems in the world, with eutrophication, and associated…”
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Inorganic carbon promotes photosynthesis, growth, and maximum biomass of phytoplankton in eutrophic water bodies by Hammer, Kathrine Jul, Kragh, Theis, Sand‐Jensen, Kaj

“…The traditional perception in limnology has been that phytoplankton biomass in lakes is limited by phosphorus, nitrogen, and light, but not by dissolved…”
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Drier, darker and more fertile: 140 years of plant habitat change driven by land‐use intensification by Finderup Nielsen, Tora, Sand‐Jensen, Kaj, Bruun, Hans Henrik, Price, Jodi

“…Questions Land‐use change is a key driver of biodiversity change. Delayed biotic responses to land‐use change impede the establishment of causal links between…”
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Photosynthesis, growth, and distribution of plants in lowland streams—A synthesis and new data analyses of 40 years research by Sand‐Jensen, Kaj, Riis, Tenna, Martinsen, Kenneth Thorø

“…This paper synthesises insights and offers new quantitative analyses of data gathered during 40 years of stream research by Danish researchers and…”
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Carbon Dioxide Partial Pressure and Emission Throughout the Scandinavian Stream Network by Martinsen, Kenneth Thorø, Kragh, Theis, Sand‐Jensen, Kaj

“…Stream networks transport and emit substantial volumes of carbon dioxide (CO2) into the atmosphere. We gathered open monitoring data from streams in three…”
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Environmental predictors of lake fish diversity across gradients in lake age and spatial scale by Martinsen, Kenneth Thorø, Kristensen, Emil, Baastrup‐Spohr, Lars, Søndergaard, Martin, Carl, Henrik, Jeppesen, Erik, Sand‐Jensen, Kaj, Kragh, Theis

“…Freshwater ecosystems have experienced a great loss of biodiversity in the recent century due to eutrophication and loss of habitats, particularly in…”
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Temporal development of biodiversity of macrophytes in newly established lakes by Stage Sø, Jonas, Sand‐Jensen, Kaj, Baastrup‐Spohr, Lars

“…Every year, a vast number of wetlands are constructed to restore ecosystem function and biodiversity, thus counteracting massive historical losses by…”
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Acclimation of photosynthesis to supersaturated CO2 in aquatic plant bicarbonate users by Hussner, Andreas, Mettler-Altmann, Tabea, Weber, Andreas P. M., Sand-Jensen, Kaj

“…Summary The photosynthesis of submerged aquatic plants can be limited by carbon dioxide (CO2) because of the low diffusivity of dissolved gas in water. About…”
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Self‐Made Equipment for Automatic Methane Diffusion and Ebullition Measurements From Aquatic Environments by Sø, Jonas Stage, Sand‐Jensen, Kaj, Kragh, Theis

“…Freshwater ecosystems are believed to account for about half of global methane emissions, but this estimate is uncertain due to few measurements in some…”
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From soaking wet to bone dry: predicting plant community composition along a steep hydrological gradient by Baastrup‐Spohr, Lars, Sand‐Jensen, Kaj, Nicolajsen, Sascha Veggerby, Bruun, Hans Henrik, Halvorsen, Rune

“…QUESTION: Why do plants grow where they grow? Prediction of species' occurrence and abundance in relation to the environment is a core aim of ecology, as is…”
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Water‐level fluctuations affect sediment properties, carbon flux and growth of the isoetid Littorella uniflora in oligotrophic lakes by Baastrup‐Spohr, Lars, Møller, Claus L, Sand‐Jensen, Kaj

“…Amphibious isoetids such as Littorella uniflora dominate the littoral zone in north‐temperate oligotrophic, softwater lakes. Accumulation of labile organic…”
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Leaf gas films, underwater photosynthesis and plant species distributions in a flood gradient by Winkel, Anders, Visser, Eric J. W., Colmer, Timothy D., Brodersen, Klaus P., Voesenek, Laurentius A. C. J., Sand‐Jensen, Kaj, Pedersen, Ole

“…Traits for survival during flooding of terrestrial plants include stimulation or inhibition of shoot elongation, aerenchyma formation and efficient gas…”
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Drag and reconfiguration of freshwater macrophytes by Sand-Jensen, Kaj

“…SUMMARY 1. Submerged freshwater macrophytes face large hydrodynamic forces in flowing waters in streams and on wave‐swept lake shores and require morphological…”
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High sensitivity of Lobelia dortmanna to sediment oxygen depletion following organic enrichment by Muller, Claus Lindskov, SandaJensen, Kaj

“…Lobelia dortmanna thrives in oligotrophic, softwater lakes thanks to O₂ and CO₂ exchange across roots and uptake of sediment nutrients. We hypothesize that low…”
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Seasonal Carbon Dioxide Concentrations and Fluxes Throughout Denmark's Stream Network by Martinsen, Kenneth Thorø, Sand‐Jensen, Kaj, Bergmann, Victor, Skjærlund, Tobias, Kjær, Johan Emil, Koch, Julian

“…Streams are important freshwater habitats in large‐scale carbon budgets because of their high CO2 fluxes which are driven by high CO2 concentrations and…”
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Influence of sediment organic enrichment and water alkalinity on growth of aquatic isoetid and elodeid plants by RAUN, ANE LØVENDAHL, BORUM, JENS, SAND-JENSEN, KAJ

“…1. Lake eutrophication has increased phytoplankton blooms and sediment organic matter. Among higher plants, small, oligotrophic rosette species (isoetids) have…”
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Fluctuating water levels control water chemistry and metabolism of a charophyte-dominated pond by Christensen, Jesper P. A., Sand-Jensen, Kaj, Staehr, Peter A.

“…Summary To investigate seasonal variability and importance of environmental drivers of ecosystem metabolism in a shallow pond characterised by low and…”
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Are latitudinal richness gradients in European freshwater species only structured according to dispersal and time? by Iversen, Lars Lønsmann, Jacobsen, Dean, Sand-Jensen, Kaj

“…The latitudinal gradient in species richness of the European freshwater fauna is usually depicted as a contrasting pattern between lentic (standing waters) and…”
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Stream‐Lake Connectivity Is an Important Control of Fluvial CO2 Concentrations and Emissions in Catchments by Sand‐Jensen, Kaj, Riis, Tenna, Kjær, Johan Emil, Martinsen, Kenneth Thorø

“…Streams in cultivated lowlands are commonly supersaturated with CO2 and are a source of CO2 to the atmosphere. Great uncertainties exist regarding the…”
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