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  • 1
    Keywords: Marine pollution. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (372 pages)
    Edition: 1st ed.
    ISBN: 9780124076617
    DDC: 333.9164
    Language: English
    Note: Front Cover -- Managing Ocean Environments in a Changing Climate: Sustainability and Economic Perspectives -- Copyright -- Contents -- Contributors -- Preface -- Chapter 1: Valuing the Ocean: An Introduction -- Purpose and Scope of the Book -- Threats to the Oceans: Current State of the Science -- A Holistic View of Threats to the Oceans -- Differential Analysis for Future Scenarios -- Global-Scale Economic Valuation: What Are the Costs of Inaction? -- Monetary vs. Nonmonetary Damages -- Thresholds and Discontinuities -- Major Categories for Valuation -- A Case Study for the Pacific: Global to Regional Aspects -- Economic Value and Earth System Function Value -- Expert Survey Approach -- The Matrix: Values, Threats, and Knowledge -- Knowledge for Decision Support -- References -- Chapter 2: Ocean Acidification -- Cause and Chemistry -- Time and Space Scales -- Future Ocean Acidification Scenarios -- Potential Future Effects on Physiological Processes and Behavior -- Changes in Calcification -- Changes to Primary Production and the Microbial Loop -- Changes to Behavior and Sensory Cues -- Changes to Reproduction, Juvenile Survival, and Recruitment -- Changes to Hypercapnia, Respiration, Energetics, and Growth -- Impacts on Communities, Food Webs, and Ecosystems -- Conclusions -- Acknowledgments -- References -- Chapter 3: Ocean Warming -- Introduction -- Physical Consequences of Ocean Warming -- "Extreme Weather": Precipitation and Flooding -- Tropical Cyclones -- Signal or Noise? -- Changes in Frequency -- Changes in Intensity, Genesis, and Storm Tracks -- Observational Evidence of an Increase in the Intensities of the Strongest Tropical Cyclones -- Projections of Tropical Cyclone Activity in the Future -- Potential Impacts of Fewer but Stronger Tropical Cyclones -- Biological Consequences of Ocean Warming -- Availability of Dissolved Oxygen. , Temperature-Dependent Respiration and Metabolism -- Thermal Limits and Distribution of Organisms -- Summary and Take-Home Messages -- References -- Chapter 4: Hypoxia -- Key Messages -- Introduction -- The Heart of the Problem -- Global Patterns in Hypoxia -- OMZs and Open Ocean Decline in Oxygen -- Environmental Consequences of Hypoxia -- Economic Consequences of Hypoxia -- Global Change and Hypoxia -- Restoration and the Future of Hypoxia -- Acknowledgments -- References -- Chapter 5: Sea-Level Rise -- Introduction -- Causes of Sea-Level Rise -- Absolute Versus Relative Sea-Level Change -- Thermal Expansion/Density Changes -- Glacier and Ice Sheet Melting -- Changes in Land Storage -- Summary -- Observations of Sea-Level Rise -- Past Sea-Level Changes -- Direct Measurements: Tide Gauges -- Satellite Measurements -- Summary of Observations -- Sea Level Rise in the Future -- Projections of Sea-Level Rise -- Impacts of Sea-Level Rise -- Types of Impacts -- Vulnerability to Sea-Level Rise -- Economic Consequences of Sea-Level Rise -- Summary and Take-Home Messages -- Acknowledgments -- References -- Chapter 6: Marine Pollution -- Introduction -- Chemical Pollution-POPs and Metals/Toxic Chemicals -- Sources and Pathways -- Effects on Marine Environment and Ecosystem Services -- Oil Pollution -- Sources and Pathways -- Impacts on the Marine Environment and Ecosystem Services -- Solid Substances -- Marine Debris -- Sedimentation and Mine Tailings -- Introduction of Hard Structures -- Radioactive Waste -- Sources and Pathways -- Effects on the Marine Environment and Ecosystem Services -- Noise -- Sources and Pathways -- Effects on the Marine Environment and Ecosystem Services -- Present and Forecasted Impacts of Pollution on Global Marine Ecosystems -- References -- Chapter 7: The Potential Economic Costs of the Overuse of Marine Fish Stocks. , Fish and Fisheries Are Important to People -- Evidence of Overuse of Fish Stocks -- Climate Change Will Exacerbate the Problem of Overuse of Fish Stocks -- Global Economic Loss due to Overfishing -- Estimated Economic Losses -- Conclusion -- References -- Chapter 8: Impacts of Multiple Stressors -- Introduction -- Global-Scale Stressors -- Local- and Regional-Scale Stressors -- Feedbacks and Synergistic Effects -- Concluding Remarks -- References -- Chapter 9: Tipping Points, Uncertainty, and Precaution: Preparing for Surprise -- Introduction -- Why Buy Insurance? -- Making Decisions in the Dark -- Peering into the Future -- Shell Game -- Pentagon Planning -- Safe Standards and Planetary Boundaries -- References -- Chapter 10: Valuing the Ocean Environment -- Introduction -- What Is Not Included -- Classic Studies of the Value of Ocean Environments -- Fisheries and Climate Change -- Tourism and Climate Change -- Costs of SLR -- Stormy Weather -- Shrinking the Ocean Carbon Sink -- Valuing the Damages -- Scenario Definitions -- Fisheries -- Sea-Level Rise -- Storms -- Tourism -- Ocean Carbon Sink -- References -- Chapter 11: Managing Multiple Human Stressors in the Ocean: A Case Study in the Pacific Ocean -- Introduction -- Pattern of Biodiversity and Marine Living Resources -- Key Human Pressures in the Pacific Ocean -- Overfishing -- Challenges to Sustainable Management of Fisheries Resources in the Pacific Ocean -- Climate Change -- Pollution and Other Human Impacts -- Sustainable Management of the Pacific Ocean -- Acknowledgments -- References -- Chapter 12: Paths to Sustainable Ocean Resources* -- Introduction -- Implications of Major Threats and Policy Recommendations -- Ocean Acidification -- Policy Recommendations -- Ocean Warming -- Policy Recommendations -- Hypoxia in the Ocean -- Policy Recommendations -- Sea-Level Rise. , Policy Recommendations -- Pollution -- Policy Recommendations -- Overuse of Marine Resources -- Policy Recommendations -- Multiple Stressors: Putting the Pieces Together -- Implications of Valuing Ocean Damages and Planning for Surprise -- Pacific Region Case Study-Implications for Regional Ocean Governance -- The Next Era of Global Ocean Governance: Paths to Sustainability -- Address Global Ocean Governance Issues -- Secure Sustainable Financing for the Ocean and Adaptation -- The "Blue Economy": The Importance of the Ocean and Coasts -- Concluding Recommendations -- References -- Index.
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  • 2
    Type of Medium: Book
    Pages: II, S. 705 - 982 , 1 CD-ROM-App.
    Series Statement: Deep-sea research 41,4/6
    Language: English
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  • 3
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Shallow marine benthic communities around Antarctica show high levels of endemism, gigantism, slow growth, longevity and late maturity, as well as adaptive radiations that have generated considerable biodiversity in some taxa. The deeper parts of the Southern Ocean exhibit some unique ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Environmental geology 15 (1990), S. 31-43 
    ISSN: 1432-0495
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Hopper dredging operations release suspended sediment into the environment by agitation of the bed and by discharge of overflow slurries. Monitoring of turbidity and suspended sediment concentrations in central Chesapeake Bay revealed two plumes: (1) an upper plume produced by overflow discharge and (2) a near-bottom plume produced by draghead agitation and rapid settling from the upper plume. The upper plume dispersed over 5.7 km2 extending 5,200 meters form the discharge point. Redeposited sediment accumulated on channel flanks covering an area of 6.4 km2 and reached a thickness of 19 cm. Altogether dredging redistributed into the environment an estimated 100,000 tons of sediment or 12 percent of the total material removed. Near-field concentrations of suspended sediment, less than 300 m from the dredge, reach 840 to 7,200 mg/L or 50 to 400 times the normal background level. Far-field concentrations (〉300 m) are enriched 5 to 8 times background concentrations and persist 34 to 50 percent of the time during a dredging cycle (1.5 to 2.0 h). The overflow discharge plume evolves through three dispersion phases: (1) convective descent, (2) dynamic collapse, and (3) long-term passive diffusion (Clark and others 1971). The bulk of the material descends rapidly to the bottom during the convective descent phase, whereas the cloud that remains in suspension is dispersed partly by internal waves. Although suspended sediment concentrations in the water column exceed certain water quality standards, benthic communities survived the perturbation with little effect.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Interactive effects of three alternating normoxia-hypoxia cycles on benthic prey exploitation by mobile fish (spot, Leiostomus xanthurus; and hogchoker, Trinectes maculatus) and a burrowing crustacean (Squilla empusa) were investigated in the York River, Chesapeake Bay, Virginia, USA, in 1989. Predators collected in four depth strata (A: 5 to 10 m; B: 10 to 14 m; C: 14 to 20 m; D:〉20 m) variously affected by hypoxia were separated into size classes (three for spot and two each for hogchoker and mantis shrimp) to examine potential ontogenetic influences in prey selection. The most severe effects of hypoxia on the benthos occurred in the two deepest strata (C and D) and decreased in shallower strata (B〉A), with Stratum A never affected by low oxygen. Predators investigated exhibited dietary evidence of optimal prey exploitation during or immediately after hypoxic events. In most instances gut contents contained significantly larger, deeper-burrowing prey during periods of low oxygen than during alternating peroids of normal oxygen levels. Spot consumed a greater biomass (45 to 73%) of polychaetes than other prey, with crustaceans initially also constituting a main dietary component but decreasing in importance later in the study period. The deep-burrowing anemone, Edwardsia elegans, was an important prey species for spot, particularly in the lower depth strata affected by hypoxia. Prey consumed by 10-to 15-cm-long spot increased significantly in size during some hypoxic events, suggesting a sublethal effect of hypoxia on large benthic species. Polychaetes (primarily Glycera americana, Notomastis latericeus and Loimia medusa) were dominant dietary components in hogchoker, making up between 85 and 98% of the diet. Bivalve siphons became important prey for hogchoker in the three deepest strata and were only consumed after the August hypoxia. Stomach contents of mantis shrimp were difficult to identify in most instances due to the near complete mastication of consumed prey. Crustaceans were important prey initially but became less conspicuous in the diet subsequent to the July hypoxia event, when hydroids became more dominant. Overall, predator species exhibited optimal exploitation of moribund or slowly recovering benthos affected by hypoxia. The sublethal effects of hypoxia through increased availability of benthos to resident predators can have important consequences for energy flow in areas such as the York River which experience periodic low-oxygen cycles.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 115 (1984), S. 153-158 
    ISSN: 1573-5117
    Keywords: aquatic Oligochaeta ; long term changes ; population dynamics ; polychaetes ; recruitment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Weekly sampling over a two year period from a muddy sand bottom in the polyhaline York River, Virginia, U.S.A., clearly identified the pattern of recruitment and survival of the dominant annelid species. Three intermingled recruitment strategies and two survival patterns were observed, ranging from the classic opportunistic life style of mass recruitment over short time periods followed by mass mortality to prolonged recruitment with lower mortality. Qualitatively the annelid assemblage was very similar from year to year with most of the changes being quantitative. Oligochaetes, Tubificoides spp., were the most stable and characteristic members of the annelid assemblage.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 155 (1987), S. 215-225 
    ISSN: 1573-5117
    Keywords: aquatic Oligochaeta ; continental shelf ; animal-sediment relations ; zoogeography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Distribution and ecology of continental shelf oligochaetes are poorly understood. From 1975 through 1977 baseline ecological studies were conducted in the Middle Atlantic Bight prior to oil exploration activities. A total of 38 species in three oligochaete families were collected. Of this total one family and 29 of the species were undescribed at the time of collection. The most abundant and widely distributed species were Limnodriloides monothecus, L. medioporus, Bathydrilus longus, Phallodrilus biprostatus, and Tubificoides diazi. No single species dominated the oligochaete fauna. All the oligochaete species responded to changes in physical parameters over the shelf similarly to the total macrofauna. Seasonal trends within the oligochaetes were not found. Species that preferred coarser sand sediments were all small interstitial forms. The finer sand and eurytopic species were all burrowers. Zoogeographically the Middle Atlantic Bight oligochaetes were predominantly temperate (16 species) with some southern species (8). Seven species were broadly distributed from the Caribbean to Massachusetts or around the world. Seven species were only known from the area studied.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-5117
    Keywords: aquatic Oligochaeta ; Tubificidae ; Caribbean fauna ; animal-sediment relations ; coral reefs ; gutless fauna
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The marine tubificid oligochaete fauna of Belize is the most diverse that has been described for the Caribbean Sea, with records for over 50% of all known Caribbean species. Tubificids were sampled at 77 stations around the outer barrier of the coral reefs off the Belize mainland. A total of 1,529 individuals representing 52 species were collected. Species distribution patterns were controlled mainly by sediment type and the presence or absence of mangroves. Six species (Phallodrilus molestus, Tubificoides bermudae, Inanidrilus leukodermatus, Heterodrilus flexuosus, Bathydrilus formosus, Smithsonidrilus hummelincki) with diverse life history characteristics were common and had broad habitat preferences being found in various types of heterogeneous sandy sediments. Heterodrilus flexuosus was the only common species in these samples known only in Belize. The other five common species range from Belize to Florida or Bermuda. Most other species have narrower habitat preferences and are limited to specific habitats. For example, one group of gutless species was restricted to organically enriched fine to medium sands, a group of Limnodriloidinae occurred only in mud around mangrove cays, and a group of meiofaunal species were restricted to saline groundwater.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 180 (1989), S. 167-176 
    ISSN: 1573-5117
    Keywords: aquatic Oligochaeta ; long-term changes ; population dynamics ; life history
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A two year fortnightly collection of data from the 27 m station in the Oresund on the tubificid species Tubificoides amplivasatus was analyzed for population trends and life stages. Recruitment patterns from year to year were consistent in timing but very irratic in magnitude, being similar to patterns seen in other estuarine and marine annelids. Sexually mature T. amplivasatus were found throughout the study period, but mature mated specimens were more abundant during late summer and autumn. It is estimated that from 120 to 150 days is spent, by this species, in the cocoon and individuals may reach maturity in less than one year. There was some indication of individuals with regressed genital organs indicating that they may live longer than one year. At the 27 m station T. amplivasatus is part of a complex and well developed benthic community. Temporal variation in this species was highly correlated to that of other major taxa (bivalves, ophiuroids).
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 278 (1994), S. 201-212 
    ISSN: 1573-5117
    Keywords: disturbance ; dredging effects ; fluid mud ; macrobenthos ; tidal freshwater ; Tubificidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The macrobenthic fauna in the tidal freshwater James River, Virginia, USA, exhibited a high degree of resilience and limited temporal response to sediment disturbance caused by large quantities of low bulk density (〈 1.3 g cm−3) fluid mud. The fluid mud was produced by hydraulic dredge deepening of a ship channel with disposal of dredged sediments onto a nearby shoal. The response of tidal freshwater communities to fluid mud was limited to mainly quantitative changes in abundance of dominant taxa (Limnodrilus spp., L. hoffmeisteri, Ilyodrilus templetoni, Corbicula fluminea, Coelotanypus scapularis) and was directly related to the thickness of fluid mud layers. Disturbance effects were short lived and for tubificids most obvious in areas with 〉 0.3 m fluid mud. In areas that received 〈 0.3 m fluid mud, acute effects were limited to chironomids and small (〈 10 mm) C. fluminea. The fauna colonizing the areas disturbed by fluid mud was the same as that inhabiting the shoal prior to disturbance. There was no indication of a successional sequence, as reported for other freshwater and marine habitats. Three weeks after the disturbance ended, all but a few insect taxa had recolonized. Changes in community structure from fluid mud disturbance were slight with total taxa best characterizing the disturbance. The insensitivity of community structure measures reflects the high resiliency of macrobenthic communities to physical stresses in tidal freshwater systems.
    Type of Medium: Electronic Resource
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