Search Results - "Chennu, Arjun"

Digitizing the coral reef: Machine learning of underwater spectral images enables dense taxonomic mapping of benthic habitats by Schürholz, Daniel, Chennu, Arjun

“…Coral reefs are the most biodiverse marine ecosystems, and host a wide range of taxonomic diversity in a complex spatial community structure. Existing coral…”
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Mapping the in situ microspatial distribution of ice algal biomass through hyperspectral imaging of sea-ice cores by Cimoli, Emiliano, Lucieer, Vanessa, Meiners, Klaus M., Chennu, Arjun, Castrisios, Katerina, Ryan, Ken G., Lund-Hansen, Lars Chresten, Martin, Andrew, Kennedy, Fraser, Lucieer, Arko

“…Ice-associated microalgae make a significant seasonal contribution to primary production and biogeochemical cycling in polar regions. However, the distribution…”
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A diver-operated hyperspectral imaging and topographic surveying system for automated mapping of benthic habitats by Chennu, Arjun, Färber, Paul, De’ath, Glenn, de Beer, Dirk, Fabricius, Katharina E.

“…We developed a novel integrated technology for diver-operated surveying of shallow marine ecosystems. The HyperDiver system captures rich multifaceted data in…”
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A Trillion Coral Reef Colors: Deeply Annotated Underwater Hyperspectral Images for Automated Classification and Habitat Mapping by Rashid, Ahmad Rafiuddin, Chennu, Arjun

“…This paper describes a large dataset of underwater hyperspectral imagery that can be used by researchers in the domains of computer vision, machine learning,…”
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Seeing the Forest for the Trees: Mapping Cover and Counting Trees from Aerial Images of a Mangrove Forest Using Artificial Intelligence by Schürholz, Daniel, Castellanos-Galindo, Gustavo, Casella, Elisa, Mejía-Rentería, Juan, Chennu, Arjun

“…Mangrove forests provide valuable ecosystem services to coastal communities across tropical and subtropical regions. Current anthropogenic stressors threaten…”
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High Net Primary Production of Mediterranean Seagrass (Posidonia oceanica) Meadows Determined With Aquatic Eddy Covariance by Koopmans, Dirk, Holtappels, Moritz, Chennu, Arjun, Weber, Miriam, de Beer, Dirk

“…We report primary production and respiration of Posidonia oceanica meadows determined with the non-invasive aquatic eddy covariance technique. Oxygen fluxes…”
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High-Resolution Dynamics of Hydrogen Peroxide on the Surface of Scleractinian Corals in Relation to Photosynthesis and Feeding by Ousley, Sara, de Beer, Dirk, Bejarano, Sonia, Chennu, Arjun

“…We developed and used a microsensor to measure fast (<1 s) dynamics of hydrogen peroxide (H 2 O 2 ) on the polyp tissue of two scleractinian coral species (…”
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Oxygenic and anoxygenic photosynthesis in a microbial mat from an anoxic and sulfidic spring by de Beer, Dirk, Weber, Miriam, Chennu, Arjun, Hamilton, Trinity, Lott, Christian, Macalady, Jennifer, M. Klatt, Judith

“…Summary Oxygenic and anoxygenic photosynthesis were studied with microsensors in microbial mats found at 9‐10 m depth in anoxic and sulfidic water in Little…”
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Effects of Bioadvection by Arenicola marina on Microphytobenthos in Permeable Sediments by Chennu, Arjun, Volkenborn, Nils, de Beer, Dirk, Wethey, David S, Woodin, Sarah A, Polerecky, Lubos

“…We used hyperspectral imaging to study short-term effects of bioturbation by lugworms (Arenicola marina) on the surficial biomass of microphytobenthos (MPB) in…”
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Use of an oxygen planar optode to assess the effect of high velocity microsprays on oxygen penetration in a human dental biofilms in-vitro by Khosravi, Yalda, Kandukuri, Rala D P, Palmer, Sara R, Gloag, Erin S, Borisov, Sergey M, Starke, E Michelle, Ward, Marilyn T, Kumar, Purnima, de Beer, Dirk, Chennu, Arjun, Stoodley, Paul

“…Dental plaque biofilms are the causative agents of caries, gingivitis and periodontitis. Both mechanical and chemical strategies are used in routine oral…”
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Correction to: Use of an oxygen planar optode to assess the effect of high velocity microsprays on oxygen penetration in a human dental biofilms in-vitro by Khosravi, Yalda, Kandukuri, Rala D P, Palmer, Sara R, Gloag, Erin S, Borisov, Sergey M, Starke, E Michelle, Ward, Marilyn T, Kumar, Purnima, de Beer, Dirk, Chennu, Arjun, Stoodley, Paul

“…An amendment to this paper has been published and can be accessed via the original article…”
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Assessing whether decisions are more sensitive to preference or prediction uncertainty with a value of information approach by Haag, Fridolin, Chennu, Arjun

“…In many decisions, we are not only uncertain about the predicted outcomes of decision alternatives but also about stakeholder preferences regarding these…”
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Which predictive uncertainty to resolve? Value of information sensitivity analysis for environmental decision models by Haag, Fridolin, Miñarro, Sara, Chennu, Arjun

“…Uncertainties in environmental decisions are large, but resolving them is costly. We provide a framework for value of information (VoI) analysis to identify…”
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MicroBenthos: a modeling framework for microbial benthic ecology by Chennu, Arjun

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Exploring flow-biofilm-sediment interactions: Assessment of current status and future challenges by Gerbersdorf, Sabine Ulrike, Koca, Kaan, de Beer, Dirk, Chennu, Arjun, Noss, Christian, Risse-Buhl, Ute, Weitere, Markus, Eiff, Olivier, Wagner, Michael, Aberle, Jochen, Schweikert, Michael, Terheiden, Kristina

“…•Flow-biofilm-sediment interactions in relation to biostabilization are reviewed.•This is supported by a joint workshop, testing feasibility of an integrated…”
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Arsenic speciation analysis in porewater by a novel colorimetric assay by Castillejos Sepúlveda, Andrea, Gatti, Lais M., Kerl, Carolin F., Chennu, Arjun, Klatt, Judith M.

“…Arsenic is common toxic contaminant, but tracking its mobility through submerged soils is difficult because microscale processes dictate its speciation and…”
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Two-Dimensional Mapping of Arsenic Concentration and Speciation with Diffusive Equilibrium in Thin-Film Gels by Castillejos Sepúlveda, Andrea, Metzger, Edouard, Littmann, Sten, Taubner, Heidi, Chennu, Arjun, Gatti, Lais, de Beer, Dirk, Klatt, Judith M.

“…We present a new approach combining diffusive equilibrium in thin-film gels and spectrophotometric methods to determine the spatial distribution of arsenite,…”
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Limitation of Microbial Processes at Saturation-Level Salinities in a Microbial Mat Covering a Coastal Salt Flat by Meier, Dimitri V, Greve, Andreas J, Chennu, Arjun, van Erk, Marit R, Muthukrishnan, Thirumahal, Abed, Raeid M M, Woebken, Dagmar, de Beer, Dirk

“…Hypersaline microbial mats are dense microbial ecosystems capable of performing complete element cycling and are considered analogs of early Earth and…”
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Hyperspectral imaging of the microscale distribution and dynamics of microphytobenthos in intertidal sediments by Chennu, Arjun, Färber, Paul, Volkenborn, Nils, Al-Najjar, Mohammad A. A., Janssen, Felix, de Beer, Dirk, Polerecky, Lubos

“…We describe a novel, field‐deployable hyperspectral imaging system, called Hypersub, that allows noninvasive in situ mapping of the microphytobenthos (MPB)…”
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Ocean Acidification Changes Abiotic Processes but Not Biotic Processes in Coral Reef Sediments by Fink, Artur, den Haan, Joost, Chennu, Arjun, Uthicke, Sven, de Beer, Dirk

“…In coral reefs, sediments play a crucial role in element cycling by contributing to primary production and the remineralization of organic matter. We studied…”
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