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Mark O. Gessner
Technical University of Berlin
EcosystemEcologyPlant litterBotanyBiology
161Publications
55H-index
16kCitations
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Publications 162
Newest
#1Carri J. LeRoy (The Evergreen State College)H-Index: 15
#2Andrew L. Hipp (Morton Arboretum)H-Index: 28
Last. Jack R. Webster (VT: Virginia Tech)
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#1Sonia Herrero Ortega (Technical University of Berlin)
#2Clara Romero González‐Quijano (Technical University of Berlin)
Last. Mark O. Gessner (Technical University of Berlin)H-Index: 55
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#1Laëtitia Minguez (University of Lorraine)H-Index: 13
#2Erik Sperfeld (University of Greifswald)
Last. Mark O. Gessner (Technical University of Berlin)H-Index: 55
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#1D. von Schiller (UPV/EHU: University of the Basque Country)H-Index: 11
#2Thibault DatryH-Index: 21
Last. Annamaria Zoppini (National Research Council)H-Index: 17
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Intermittent rivers and ephemeral streams (IRES) may represent over half the global stream network, but their contribution to respiration and carbon dioxide (CO2) emissions is largely undetermined. In particular, little is known about the variability and drivers of respiration in IRES sediments upon rewetting, which could result in large pulses of CO2. We present a global study examining sediments from 200 dry IRES reaches spanning multiple biomes. Results from standardized assays show that mean...
Source
#1Zachary E. Kayler (UIdaho: University of Idaho)H-Index: 2
#2Katrin Premke (Leibniz Association)H-Index: 18
Last. Hans-Peter Grossart (University of Potsdam)H-Index: 54
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Across a landscape, aquatic-terrestrial interfaces within and between ecosystems are hotspots of organic matter (OM) mineralization. These interfaces are characterized by sharp spatio-temporal changes in environmental conditions, which affect OM properties and thus control OM mineralization and other transformation processes. Consequently, the extent of OM movement at and across aquatic-terrestrial interfaces is crucial in determining OM turnover and carbon (C) cycling at the landscape scale. He...
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#1O. Shumilova (FU: Free University of Berlin)H-Index: 3
#2Dominik Zak (University of Rostock)H-Index: 1
Last. Christiane Zarfl (University of Tübingen)H-Index: 15
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Climate change and human pressures are changing the global distribution and extent of intermittent rivers and ephemeral streams (IRES), which comprise half of the global river network area. IRES are characterized by periods of flow cessation, during which channel substrates accumulate and undergo physico‐chemical changes (preconditioning), and periods of flow resumption, when these substrates are rewetted and release pulses of dissolved nutrients and organic matter (OM). However, there are no es...
2 CitationsSource
#1Ellard R. Hunting (UoB: University of Bristol)H-Index: 1
#2R. Giles Harrison (University of Reading)H-Index: 18
Last. Mark O. Gessner (Leibniz Association)H-Index: 55
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The Earth’s subsurface represents a complex electrochemical environment that contains many electro-active chemical compounds that are relevant for a wide array of biologically driven ecosystem processes. Concentrations of many of these electro-active compounds within Earth’s subsurface environments fluctuate during the day and over seasons. This has been observed for surface waters, sediments and continental soils. This variability can affect particularly small, relatively immobile organisms liv...
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#1Sahadevan Seena (UC: University of Coimbra)H-Index: 16
#2Felix Bfirlocher (MtA: Mount Allison University)H-Index: 43
Last. Manuel A. S. Graça (UC: University of Coimbra)H-Index: 39
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Abstract Global patterns of biodiversity have emerged for soil microorganisms, plants and animals, and the extraordinary significance of microbial functions in ecosystems is also well established. Virtually unknown, however, are large-scale patterns of microbial diversity in freshwaters, although these aquatic ecosystems are hotspots of biodiversity and biogeochemical processes. Here we report on the first large-scale study of biodiversity of leaf-litter fungi in streams along a latitudinal grad...
1 CitationsSource
#1Jérémy Jabiol (University of Toulouse)H-Index: 6
#2Antoine Lecerf (University of Toulouse)H-Index: 19
Last. Eric Chauvet (University of Toulouse)H-Index: 47
view all 5 authors...
Rates of leaf litter decomposition in streams are strongly influenced both by inorganic nutrients dissolved in stream water and by litter traits such as lignin, nitrogen (N) and phosphorus (P) concentrations. As a result, decomposition rates of different leaf species can show contrasting responses to stream nutrient enrichment resulting from human activities. It is unclear, however, whether the root cause of such discrepancies in field observations is the interspecific variation in either litter...
Source
#1Scott D. TiegsH-Index: 22
#2David M. CostelloH-Index: 11
Last. Jacob A. ZwartH-Index: 9
view all 152 authors...
River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to conduct a global-scale field experiment in greater than 1000 river and riparian sites. We found that Earth’s biomes have distinct carbon processing si...
11 CitationsSource
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