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  • 1
    Schlagwort(e): Report ; Dissertation ; Hochschulschrift ; Brasilien Nord ; Mangrove ; Auswaschung ; Stoffstrom
    Materialart: Buch
    Seiten: X, 229 S , graph. Darst., Kt
    Serie: ZMT-contributions 5
    Sprache: Englisch , Deutsch
    Anmerkung: Zsfassung in deutscher Spr. S. IX - X , Zugl.: Bremen, Univ., Diss.
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  • 2
    Schlagwort(e): Forschungsbericht
    Materialart: Online-Ressource
    Seiten: 1 Online-Ressource (39 Seiten, 2,66 MB) , Diagramme, Karten
    Sprache: Deutsch
    Anmerkung: Förderkennzeichen BMBF 03G0254A , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
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  • 3
    In: Biogeosciences, Göttingen : Copernicus Publ., 2004, 9(2012), 11, Seite 4629-4643, 1726-4170
    In: volume:9
    In: year:2012
    In: number:11
    In: pages:4629-4643
    Materialart: Artikel
    ISSN: 1726-4170
    Sprache: Englisch
    Anmerkung: Auch als elektronisches Dokument verfügbar: http://www.biogeosciences.net/9/4629/2012/bg-9-4629-2012.pdf
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  • 4
    Online-Ressource
    Online-Ressource
    Dordrecht :Springer Netherlands,
    Schlagwort(e): Coastal zone management. ; Electronic books.
    Beschreibung / Inhaltsverzeichnis: Coastal areas face rising pressures from land use change, developmental activities, shoreline erosion, biodiversity losses and natural calamities. This volume addresses those issues in light of sustainability, focusing on the most urgent current problems.
    Materialart: Online-Ressource
    Seiten: 1 online resource (289 pages)
    Ausgabe: 1st ed.
    ISBN: 9789048130689
    DDC: 333.917
    Sprache: Englisch
    Anmerkung: Intro -- Title Page -- Copyright Page -- Foreword -- Preface -- About the Editors -- Table of Contents -- SECTION 1 Evaluation, Status Prediction, Modelling and Developments of Coastal Zones: Management Issues -- 1 Observational Needs for Sustainable Coastal Prediction and Management -- 1. INTRODUCTION -- 1.1 Defining the Earth System -- 1.2 What is Sustainability? -- 1.3 Modelling the Earth System -- 1.4 Earth System Prediction -- 1.5 Observing the Earth System for Sustainable Management -- 2. OBSERVATIONS FOR SUSTAINABLE COASTAL MANAGEMENT -- 2.1 Observing the Natural-human System -- 2.2 Observing the Coast from Microbes to Man -- 2.3 A Prototype Regional Earth System Prediction for an Estuary -- 2.4 Model-data Synthesis for Sustainable Management -- 3. CONCLUDING THOUGHTS -- REFERENCES -- 2 Ecological Modelling as a Tool for Coastal Ecosystem Management -- 1. INTRODUCTION -- 2. COASTAL ECOSYSTEM MANAGEMENT AND MODELLING -- 3. STATISTICAL ECOSYSTEM MODELLING -- 4. DYNAMIC ECOSYSTEM MODELLING -- 4.1 Hydrodynamic Modelling -- 4.1.1 Hydrostatic Models -- 4.1.2 Non-hydrostatic Models -- 4.1.3 Challenges of Current Hydrodynamic/Physical Models -- 4.2 Lower Trophic Level Modelling -- 4.3 Higher Trophic Level Food Web Modelling -- 4.4 Sediment Flux Modelling -- 5. SPECIAL ISSUES -- 5.1 Marshes, Wetlands and Mangroves -- 5.2 Data Assimilation -- 5.3 Submerged Aquatic Vegetation Modelling -- 5.4 Model Skill Assessment -- 6. CONCLUSION AND FUTURE DIRECTIONS -- REFERENCES -- 3 Current Status of Coastal Zone Management Practices in India -- 1. INTRODUCTION -- 2. STATUS OF INDIAN COASTAL ENVIRONMENT -- 3. IMPACT OF SEA LEVEL RISE ON THE INDIAN COASTAL ENVIRONMENT -- 4. MAJOR INITIATIVES FOR PROTECTION OF MARINE AND COASTAL ENVIRONMENT IN INDIA -- 4.1 Implementation of the CRZ Notification -- 4.2 Current Status of the CRZ. , 4.3 Objections against the CZM Notification -- 4.3.1 The CZM Notification - Conservation -- 4.3.2 The CZM Notification - Sustainable Development -- 4.3.3 The CZM Notification - Livelihoods -- 5. CONCLUSION -- REFERENCES -- 4 Climate Resilient Coastal Zone Development in Bangladesh: Participatory Governance for Common Resources Management -- 1. INTRODUCTION -- 2. COMMON PROPERTY REGIME: AN ENTRY POINT FOR POVERTY REDUCTION -- 2.1 Participatory Governance of the Common Resources -- 2.2 Case Studies on Individual, Community and Systematic Capability Approach -- 2.3 Discussion on Case Studies and Way Forward -- 3. COASTAL FOREST RESOURCES MANAGEMENT THROUGH SCIENTIFIC APPROACH -- 4. COASTAL LAND RESOURCES MANAGEMENT THROUGH PARTICIPATORY APPROACH -- 5. CREATE MECHANISMS TO ENSURE STAKEHOLDERS' PARTICIPATION IN BIODIVERSITY CONSERVATION AT LOCAL LEVEL -- 6. ESTABLISHMENT OF COMMON WEALTH AND PARTICIPATORY MANAGEMENT -- 6.1 Common Wealth for Sustainable Management (CWSM) - With Special Reference to SPA -- 6.2 CWSM - With Special Reference to Shrimp Cultivation -- 6.3 CWSM - With Special Reference to Coastal Embankments and Its Erosion Control -- 6.4 CWSM - With Special Reference to Joint Coastal Forest Management -- 7. CONCLUSIONS -- REFERENCES -- 5 Present Status, Challenges and Management of the Japanese Coastal Zone Environment -- 1. INTRODUCTION -- 2. FACTS ABOUT THE JAPANESE COASTLINE -- 3. MAJOR CONCERNS OF JAPANESE COAST -- 3.1 Sea Level Rise and Climate Change -- 3.2 Eco-hydrological Conditions -- 3.3 Anthropogenic Utilization and Their Impact -- 3.4 Disaster Situation and Their Prevention -- 4. COASTAL ZONE MANAGEMENT IN JAPAN -- 4.1 Legal Framework of Coastal Management -- 4.2 Integrated Coastal Zone Management-Concept -- 4.3 ICZM Practices in Japan -- 4.4 Challenges for Integrated Coastal Zone Management -- 5. CONCLUSIONS -- REFERENCES. , 6 Integrating Hydrologic and Hydrodynamic Models for Decision Support Systems and Management of Coastal Zones and Estuaries -- 1. INTRODUCTION -- 2. STUDY AREA -- 3. MATERIALS AND METHODS -- 3.1 Mixing/flow Dynamics -- 3.2 Spatially Distributed Hydrologic Forcing -- 3.3 Calibration, Validation/Verification with a Case Study -- 4. RESULTS AND DISCUSSIONS -- 5. CONCLUSIONS -- REFERENCES -- 7 Creation of System "Delta-Sea" as a Basis of Ecosystem Approach to the Management of Large Aral Sea's Coastal Zone -- 1. INTRODUCTION -- 2. SOUTHERN PREARALIE: DEVELOPING SITUATION -- 2.1 Basic Results of Researches Carried Out and Suggestions for Aral Sea's Survival -- 2.2 Eternal Russian Question: What to do? -- 3. CONCLUSION -- REFERENCES -- SECTION 2 Coastal Zone Water Resources (Quantity and Quality): Challenges for Sustainability -- 8 Critical Evaluation of the Recent Development and Trends in Submarine Groundwater Discharge Research in Asia -- 1. INTRODUCTION -- 2. PHENOMENOLOGICAL DESCRIPTION AND DRIVERS -- 3. ESTIMATION OF THE MAGNITUDE OF SGD -- 3.1 Investigations from the Land Side -- 3.2 Investigations from the Sea Side -- 3.3 Indirect Indicators of SGD -- 3.4 Mixing Near the Sea Shore -- 4. IMPORTANCE OF SGD IN ASIAN OUTLOOK -- 5. CURRENT STATUS OF SGD RESEARCH IN ASIA -- 5.1 Japan -- 5.2 Korea -- 5.3 India -- 5.4 Bangladesh -- 5.5 Thailand -- 5.6 China -- 6. FUTURE PERSPECTIVES -- 7. SUMMARY -- REFERENCES -- 9 Influence of Climate Factors on the Groundwater Resources of Coastal Tamilnadu -- 1. INTRODUCTION -- 1.1 Study Area -- 1.2 Quaternary Formations -- 1.3 Depth to Water Table -- 2. METHODOLOGY -- 3. HYDROGEOCHEMISTRY -- 3.1 Tritium -- 3.2 Geochemical Nature -- 3.3 18O -- 3.4 13C -- 4. CONCLUSION -- REFERENCES -- 10 Natural Arsenic in Coastal Groundwaters in the Bengal Delta Region in West Bengal, India -- 1. INTRODUCTION. , 2. MATERIALS AND METHODS -- 2.1 Study Area -- 2.2 Sampling and Analytical Techniques -- 3. RESULTS AND DISCUSSION -- 3.1 pH, Redox and Major Ion Characteristics -- 3.2 Distribution of Arsenic, Iron, Manganese and DOC -- 3.3 Relationship between the Key Water Quality Parameters with Redox Sensitive Elements -- 3.4 Statistical Evaluation of the Data -- 3.4.1 Factor 1 -- 3.4.2 Factor 2 -- 3.4.3 Factor 3 -- 4. CONCLUSIONS -- REFERENCES -- 11 Chemical Composition and Origin of the Coastal Zone Thermal Springs in Far East Russia -- 1. INTRODUCTION -- 2. MATERIALS AND METHODS -- 3. STUDY AREA -- 4. RESULTS AND DISCUSSION -- 4.1 Major Ions -- 4.2 Trace Elements -- 4.2.1 Siderophile Elements -- 4.2.2 Chalcophile Elements -- 4.2.3 Lithophile Group -- 4.2.4 Rare-earth Elements (REE) -- 4.3 Gas Composition -- 4.4 Origin of Thermal Waters -- 5. CONCLUSIONS -- REFERENCES -- SECTION 3 Biodiversity of Coastal Zones and Its Sustainability -- 12 Organic Matter and Mangrove Productivity -- 1. INTRODUCTION -- 2. ORGANIC MATTER SOURCES AND SINKS -- 3. CHEMICAL CHARACTERISTICS OF ORGANIC MATTER -- 3.1 Atomic C:N Ratio and Stable Carbon Isotopes -- 3.2 Molecular Biomarkers -- 4. OUTWELLING AND TRANSPORT OF MANGROVE ORGANIC MATTER -- 5. SUMMARY AND CONCLUSION -- REFERENCES -- 13 Influence of Terrestrial Inputs on Mangrove and Coral Reef: Primary Productivity of the Andaman Islands -- 1. BACKGROUND -- 2. STUDY AREA -- Mangrove Forests of the Andaman Islands -- Coral Reef Ecosystems of the Andaman Islands -- Significance of the Terrestrial and Coastal Ecosystems -- Mineralization and Immobilization -- 3. MATERIALS AND METHODS -- Sampling of Surface Water -- Sediment Denitrification -- Primary Productivity -- Leaf Litter C:N Estimation -- 4. RESULTS AND DISCUSSION -- 4.1 Spatial Variations -- 4.2 Denitrification -- 4.3 SEDIMENT CARBON AND NITROGEN -- 4.4 Primary Productivity. , 4.5 Leaf Litter C:N Analysis -- 5. SUMMARY AND CONCLUSIONS -- REFERENCES -- 14 Dissolved Metal Distribution in Indian Mangrove Ecosystem: Case Studies from East Coast of India -- 1. INTRODUCTION -- 2. MATERIALS AND METHODS -- 3. RESULTS AND DISCUSSION -- 4. CONCLUSION -- REFERENCES -- SECTION 4 Threats to Coastal Aquatic Ecosystems: Developmental and Sustainability Issues -- 15 Shrimp Culture: Trend, Consequences and Sustainability in the South-western Coastal Region of Bangladesh -- 1. INTRODUCTION -- 2. CURRENT STATE OF SHRIMP CULTURE -- 3. THE TRENDS -- 3.1 Trends in the Changes of Land-use Pattern -- 3.2 Trends in Employment Pattern -- 3.3 Trends in Yield, Export and Earnings -- 3.4 Trends in Local Supply Chain -- 4. THE CONSEQUENCES -- 4.1 Consequences on the Physical Environment -- 4.2 Consequences on the Biological Environment -- 4.3 Societal and Economic Consequences -- 5. THE BLUE REVOLUTION: A REALITY CHECK -- 6. THE ISSUE OF SUSTAINABILITY: ENVIRONMENTAL CONCERNS -- 7. THE MEASURES FOR SUSTAINABILITY: POLICY AND LEGAL ISSUES -- 8. CONCLUSION -- REFERENCES -- 16 Role of Sand Dunes and Mangroves in the Mitigation of Coastal Hazards with Reference to 2004 Tsunami -- 1. INTRODUCTION -- 2. SAND DUNES -- 2.1 Sand Dunes Saved the Villages -- 2.2 Saving the Sand Dunes -- 2.2.1 Dune Grass Planting -- 2.2.2 Dune Thatching -- 2.2.3 Sand Bag Structures -- 2.2.4 Public Awareness and Community-based Participation -- 3. MANGROVES -- 3.1 Causes of Depletion -- 3.2 Mangroves - Life Saving Role -- 3.3 Protecting Mangroves -- 4. MODEL PLAN -- 5. CONCLUSION -- REFERENCES -- 17 Assessment of Potential Health Risk through Arsenic Flow in FoodChain-A Study in Gangetic Delta of West Bengal -- 1. INTRODUCTION -- 2. MATERIALS AND METHODS -- 2.1 Teflon Bomb Digestion of Vegetable and Crop Samples -- 2.2 Sample Analysis -- 3. RESULTS. , 3.1 Bioaccumulation of Arsenic in Cereals and Pulses.
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  • 5
    Publikationsdatum: 2023-12-14
    Beschreibung: Zooplankton grazing onphytoplankton promotes the release of particulate and dissolved organic matter (DOM) into the water column and therefore plays a key role in organic matter cycling in aquatic systems. Prokaryotes are the main DOM consumers in the ocean by actively remineralizing and transforming it, contributing to its molecular diversification. To explore the molecular composition of zooplankton‐derived DOM and its bioavailability to natural prokaryotic communities, the DOM generated by a mixed zooplankton community in the coastal Atlantic off Spain was used as substrate for a natural prokaryotic community and monitored over a ~ 5‐d incubation experiment. The molecular composition of solid‐phase extracted DOM was characterized via Fourier‐transform ion cyclotron resonance mass spectrometry. After ~ 4 d in the zooplankton‐derived DOM amended incubation, the prokaryotic community demonstrated a 17‐fold exponential increase in cell number. The prokaryotic growth resulted in a reduction in bulk dissolved organic carbon concentration and the zooplankton‐derived DOM was considerably transformed at molecular and bulk elemental levels over the incubation period. The C : N ratio (calculated from the obtained molecular formulae) increased while the functional diversity decreased over the incubation time. In addition, molecular indices pointed to a reduced bioavailability of DOM at the end of the experiment. These findings show that zooplankton excreta are a source of labile organic matter that is quickly metabolized by the prokaryotic community. Therefore, a fraction of carbon is shunted from transfer to secondary consumers similarly to the viral shunt, suggesting that the zooplankton–prokaryotic interactions play an important role in the ocean's carbon cycle.
    Beschreibung: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Beschreibung: Xunta de Galicia http://dx.doi.org/10.13039/501100010801
    Schlagwort(e): ddc:577.7 ; Spain ; coastal Atlantic ; zooplankton–prokaryotic interactions ; ocean’s carbon cycle
    Sprache: Englisch
    Materialart: doc-type:article
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  • 6
    Publikationsdatum: 2022-10-01
    Beschreibung: Bacteria play a key role in sustaining the chemodiversity of marine dissolved organic matter (DOM), yet there is limited direct evidence of a major contribution of bacterial exometabolites to the DOM pool. This study tests whether molecular formulae of intact exometabolites can be detected in natural DOM via untargeted Fourier‐transform ion cyclotron resonance mass spectrometry (FT‐ICR‐MS). We analyzed a series of quantitative mixtures of solid‐phase extracted DOM from the deep ocean, of a natural microbial community and selected model strains of marine bacteria. Under standard instrument settings (200 broadband scans, mass range 92–1000 Da), 77% of molecular formulae were shared between the mesocosm and marine DOM. However, there was 〈 10% overlap between pure bacterial exometabolome with marine DOM, and in mixing ratios closest to mimicking natural environments (1% bacterial DOM, 99% marine DOM), only 4% of the unique bacterial exometabolites remained detectable. Further experiments with the bacterial exometabolome DOM mixtures using enhanced instrument settings resulted in increased detection of the exometabolites at low concentrations. At 1000 and 10,000 accumulated scans, 23% and 29% of the unique molecular formulae were detectable at low concentrations, respectively. Moreover, windowing a specific mass range encompassing a representative fraction of exometabolites tripled the number of unique detected formulae at low concentrations. Routine FT‐ICR‐MS settings are thus not always sufficient to distinguish bacterial exometabolome patterns from a seawater DOM background. To observe these patterns at higher sensitivity, we recommend a high scan number coupled with windowing a characteristic region of the molecular fingerprint.
    Beschreibung: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Schlagwort(e): ddc:551.46 ; ddc:579.3 ; ddc:
    Sprache: Englisch
    Materialart: doc-type:article
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  • 7
    Publikationsdatum: 2023-01-27
    Beschreibung: Dissolved organic matter (DOM) is the largest organic carbon reservoir in the ocean and an integral component of biogeochemical cycles. The role of free‐living microbes in DOM transformation has been studied thoroughly, whereas little attention has been directed towards the influence of benthic organisms. Sponges are efficient filter feeders and common inhabitants of many benthic communities circumglobally. Here, we investigated how two tropical coral reef sponges shape marine DOM. We compared bacterial abundance, inorganic and organic nutrients in off reef, sponge inhalant, and sponge exhalant water of Melophlus sarasinorum and Rhabdastrella globostellata. DOM and bacterial cells were taken up, and dissolved inorganic nitrogen was released by the two Indo‐Pacific sponges. Both sponge species utilized a common set of 142 of a total of 3040 compounds detected in DOM on a molecular formula level via ultrahigh‐resolution mass spectrometry. In addition, species‐specific uptake was observed, likely due to differences in their associated microbial communities. Overall, the sponges removed presumably semi‐labile and semi‐refractory compounds from the water column, thereby competing with pelagic bacteria. Within minutes, sponge holobionts altered the molecular composition of surface water DOM (inhalant) into a composition similar to deep‐sea DOM (exhalent). The apparent radiocarbon age of DOM increased consistently from off reef and inhalant to exhalant by about 900 14C years for M. sarasinorum. In the pelagic, similar transformations require decades to centuries. Our results stress the dependence of DOM lability definition on the respective environment and illustrate that sponges are hotspots of DOM transformation in the ocean.
    Beschreibung: Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg
    Beschreibung: Ministry for Science and Culture of Lower Saxony http://dx.doi.org/10.13039/501100010570
    Beschreibung: Carl‐von‐Ossietzky University Oldenburg
    Beschreibung: Alfred‐Wegener‐Institute, Helmholtz‐Center for Polar and Marine Research
    Beschreibung: Volkswagen Foundation http://dx.doi.org/10.13039/501100001663
    Beschreibung: https://doi.org/10.5061/dryad.m0cfxpp6v
    Schlagwort(e): ddc:577.7 ; Indo-Pacific sponges ; dissolved organic matter ; biogeochemical cycles
    Sprache: Englisch
    Materialart: doc-type:article
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  • 8
    Publikationsdatum: 2020-02-06
    Beschreibung: Dissolved organic matter (DOM) represents a major reservoir of carbon in the oceans. Environmental stressors such as ocean acidification (OA) potentially affect DOM production and degradation processes, e.g., phytoplankton exudation or microbial uptake and biotransformation of molecules. Resulting changes in carbon storage capacity of the ocean, thus, may cause feedbacks on the global carbon cycle. Previous experiments studying OA effects on the DOM pool under natural conditions, however, were mostly conducted in temperate and coastal eutrophic areas. Here, we report on OA effects on the existing and newly produced DOM pool during an experiment in the subtropical North Atlantic Ocean at the Canary Islands during an (1) oligotrophic phase and (2) after simulated deep water upwelling. The last is a frequently occurring event in this region controlling nutrient and phytoplankton dynamics. We manipulated nine large-scale mesocosms with a gradient of pCO2 ranging from ~350 up to ~1,030 μatm and monitored the DOM molecular composition using ultrahigh-resolution mass spectrometry via Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). An increase of 37 μmol L−1 DOC was observed in all mesocosms during a phytoplankton bloom induced by simulated upwelling. Indications for enhanced DOC accumulation under elevated CO2 became apparent during a phase of nutrient recycling toward the end of the experiment. The production of DOM was reflected in changes of the molecular DOM composition. Out of the 7,212 molecular formulae, which were detected throughout the experiment, ~50% correlated significantly in mass spectrometric signal intensity with cumulative bacterial protein production (BPP) and are likely a product of microbial transformation. However, no differences in the produced compounds were found with respect to CO2 levels. Comparing the results of this experiment with a comparable OA experiment in the Swedish Gullmar Fjord, reveals similar succession patterns for individual compound pools during a phytoplankton bloom and subsequent accumulation of these compounds were observed. The similar behavior of DOM production and biotransformation during and following a phytoplankton bloom irrespective of plankton community composition and CO2 treatment provides novel insights into general dynamics of the marine DOM pool.
    Materialart: Article , PeerReviewed
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  • 9
    Publikationsdatum: 2021-04-23
    Beschreibung: Oceanic dissolved organic carbon (DOC) is an important carbon pool, similar in magnitude to atmospheric CO2, but the fate of its oldest forms is not well understood. Hot hydrothermal circulation may facilitate the degradation of otherwise un-reactive dissolved organic matter, playing an important role in the long-term global carbon cycle. The oldest, most recalcitrant forms of DOC, which make up most of oceanic DOC, can be recovered by solid-phase extraction. Here we present measurements of solid-phase extractable DOC from samples collected between 2009 and 2013 at seven vent sites in the Atlantic, Pacific and Southern oceans, along with magnesium concentrations, a conservative tracer of water circulation through hydrothermal systems. We find that magnesium and solid-phase extractable DOC concentrations are correlated, suggesting that solid-phase extractable DOC is almost entirely lost from solution through mineralization or deposition during circulation through hydrothermal vents with fluid temperatures of 212-401°C. In laboratory experiments, where we heated samples to 380°C for four days, we found a similar removal efficiency. We conclude that thermal degradation alone can account for the loss of solid-phase extractable DOC in natural hydrothermal systems, and that its maximum lifetime is constrained by the timescale of hydrothermal cycling, at about 40 million years
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  • 10
    Publikationsdatum: 2017-04-13
    Beschreibung: Marine dissolved organic matter (DOM) is one of the largest active organic carbon reservoirs on Earth, and changes in its pool size or composition could have a major impact on the global carbon cycle. Ocean acidification is a potential driver for these changes because it influences marine primary production and heterotrophic respiration. We simulated ocean acidification as expected for a “business-as-usual” emission scenario in the year 2100 in an unprecedented long-term mesocosm study. The large-scale experiments (50 m3 each) covered a full seasonal cycle of marine production in a Swedish Fjord. Five mesocosms were artificially enriched in CO2 to the partial pressure expected in the year 2100 (900 μatm), and five more served as controls (400 μatm). We applied ultrahigh-resolution mass spectrometry to monitor the succession of 7360 distinct DOM formulae over the course of the experiment. Plankton blooms had a clear effect on DOM concentration and molecular composition. This succession was reproducible across all 10 mesocosms, independent of CO2 treatment. In contrast to the temporal trend, there were no significant differences in DOM concentration and composition between present-day and year 2100 CO2 levels at any time point of the experiment. On the basis of our results, ocean acidification alone is unlikely to affect the seasonal accumulation of DOM in productive coastal environments.
    Materialart: Article , PeerReviewed
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