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Temporal Variability And Bio Physical Coupling In The Pelagic Fauna Of Monterey Bay
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Book Synopsis Temporal Variability and Bio-physical Coupling in the Pelagic Fauna of Monterey Bay by : Samuel Stetson Urmy
Download or read book Temporal Variability and Bio-physical Coupling in the Pelagic Fauna of Monterey Bay written by Samuel Stetson Urmy and published by . This book was released on 2012 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Temporal variability is an important feature of aquatic ecosystems that is often difficult to measure. To this end, a stationary, upward-facing scientific echosounder was used to record the vertical distribution of pelagic fauna in Monterey Bay, California, for 18 months. To characterize these distributions, we developed and tested a suite of metrics quantifying the distribution of biomass in the water column. These metrics recorded a strong seasonal cycle, with total backscatter reaching a minimum during the spring upwelling season and a maximum in the fall and winter. Variability was greatest at long time scales and displayed a power spectrum similar to that of a turbulent fluid, with discrete peaks at 12- and 24-hour periods, corresponding to the semidiurnal tide and diel vertical migration. Pelagic animals also responded to short-term oceanographic variability, moving up in the water column and decreasing in abundance in the days following upwelling events. At longer lags, consistent with reproduction of small zooplankton (38 days), their abundance increased. Primary production appeared to propagate down the water column at rates consistent with sinking marine snow. Animal density throughout the water column was positively correlated at 0-2 day lags with sea level. Active acoustics are a useful addition to ocean observatories. The metrics presented here provide a useful and objective set of descriptors for stationary acoustic data. Such data provides insight into pelagic ecosystem dynamics unavailable with other sampling methods, and has great potential for future research.
Book Synopsis Bio-physical Interactions of Small Pelagic Fish Schools and Zooplankton Prey in the California Current System Over Multiple Scales by : Amanda May Kaltenberg
Download or read book Bio-physical Interactions of Small Pelagic Fish Schools and Zooplankton Prey in the California Current System Over Multiple Scales written by Amanda May Kaltenberg and published by . This book was released on 2010 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small pelagic fish represent a critical trophic link between plankton and large predators in marine upwelling ecosystems such as the California Current System. Populations of these fish are highly variable over time and are characterized by extreme fluctuations in abundance, which have significant ecosystem impacts. The causes driving this instability are not well understood, but several climactic and ecological factors have been hypothesized. This research investigated the linkages between habitat, plankton prey resources, and the abundance and behavior of small pelagic fish at various temporal and spatial scales (i.e., daily, weekly patterns of wind-driven upwelling, and seasonal) to understand how changes in physical and prey habitats influence trophic interactions. This research utilized a combination of stationary and shipboard acoustics, net sampling, and physical oceanography sampling approaches. A comparison of diel schooling behavior and zooplankton availability off Oregon and Monterey Bay, California revealed that changes in fish aggregation behaviors were caused by different timings of zooplankton availability in each region attributable to the extent of zooplankton diel vertical migrations. An analysis of the spatial relationships of acoustic scatterers across ocean fronts caused by wind-driven coastal upwelling indicated that upwelling may lead to a spatial mismatch between small plankton prey and schooling fish that select habitat based on their preference of warmer temperatures. The temporal patterns of zooplankton and pelagic fish abundance near the Columbia River plume were identified, finding that the seasonal appearance of small pelagic fish occurred very abruptly. The timing of fish arrival was poorly correlated with zooplankton abundance but was strongly linked with temperature, salinity, and river flow. Zooplankton abundance was highly variable with very large spikes occurring with the passage of tidally-driven river fronts. This research on the ecological and environmental factors between habitat, plankton, and small pelagic fish has revealed that both the physical habitat and prey fields play an important role in determining these interactions. Variability in the trophic interaction between small pelagic fish and zooplankton over varying scales has important ecosystem consequences, including the potential availability of these prey resources to larger predators, as well as impacts for management.
Download or read book 1994 Ocean Sciences Meeting written by and published by . This book was released on 1994 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1994 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Real-time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms by : Babin, Marcel
Download or read book Real-time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms written by Babin, Marcel and published by UNESCO. This book was released on 2008-06-05 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of harmful phytoplankton in marine ecosystems can cause massive fish kills, contaminate seafood with toxins, impact local and regional economies and dramatically affect ecological balance. Real-time observations are essential for effective short-term operational forecasting, but observation and modelling systems are still being developed. This volume provides guidance for developing real-time and near real-time sensing systems for observing and predicting plankton dynamics, including harmful algal blooms, in coastal waters. The underlying theory is explained and current trends in research and monitoring are discussed.Topics covered include: coastal ecosystems and dynamics of harmful algal blooms; theory and practical applications of in situ and remotely sensed optical detection of microalgal distributions and composition; theory and practical applications of in situ biological and chemical sensors for targeted species and toxin detection; integrated observing systems and platforms for detection; diagnostic and predictive modelling of ecosystems and harmful algal blooms, including data assimilation techniques; observational needs for the public and government; and future directions for research and operations.
Book Synopsis Dynamics of Marine Ecosystems by : K. H. Mann
Download or read book Dynamics of Marine Ecosystems written by K. H. Mann and published by John Wiley & Sons. This book was released on 2013-04-16 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new edition of this widely respected text providescomprehensive and up-to-date coverage of the effects ofbiological–physical interactions in the oceans from themicroscopic to the global scale. considers the influence of physical forcing on biologicalprocesses in a wide range of marine habitats including coastalestuaries, shelf-break fronts, major ocean gyres, coral reefs,coastal upwelling areas, and the equatorial upwelling system investigates recent significant developments in this rapidlyadvancing field includes new research suggesting that long-term variability inthe global atmospheric circulation affects the circulation of oceanbasins, which in turn brings about major changes in fish stocks.This discovery opens up the exciting possibility of being able topredict major changes in global fish stocks written in an accessible, lucid style, this textbook isessential reading for upper-level undergraduates and graduatestudents studying marine ecology and biological oceanography
Book Synopsis Effects of Trawling and Dredging on Seafloor Habitat by : National Research Council
Download or read book Effects of Trawling and Dredging on Seafloor Habitat written by National Research Council and published by National Academies Press. This book was released on 2002-08-09 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concerns over the potential ecological effects of fishing have increased with the expansion of fisheries throughout the marine waters of the United States. Effects of Trawling and Dredging on Seafloor Habitat describes how assessment of fishing impacts depends on gear type, number and location of bottom tows, and the physical and biological characteristics of seafloor habitats. Many experimental studies have documented acute, gear-specific effects of trawling and dredging on various types of habitat. These studies indicate that low mobility, long-lived species are more vulnerable to towed fishing gear than short-lived species in areas where the seabed is often disturbed by natural phenomena. Trawling and dredging may also change the composition and productivity of fish communities dependent on seafloor habitats for food and refuge. The scale of these impacts depends on the level of fishing effort. This volume presents color maps of fishing effort for all regions with significant bottom trawl or dredge fisheries-the first time that such data has been assembled and analyzed for the entire nation.
Download or read book 1998 Ocean Sciences Meeting written by and published by . This book was released on 1998 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :AMC-NRC Joint Working Group on Ocean Sciences Publisher :National Academies Press ISBN 13 :030918407X Total Pages :292 pages Book Rating :4.3/5 (91 download)
Book Synopsis Building Ocean Science Partnerships by : AMC-NRC Joint Working Group on Ocean Sciences
Download or read book Building Ocean Science Partnerships written by AMC-NRC Joint Working Group on Ocean Sciences and published by National Academies Press. This book was released on 1999-10-26 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building Ocean Science Partnerships describes a set of potential ocean science projects for cooperative research between scientists from the United States and Mexico, particularly focused on the Pacific Coast of California and Baja California, the Gulf of California, and the Gulf of Mexico. Barriers to cooperation between scientists of the two nations are identified, and methods to overcome such barriers are recommended. The book describes how interactions can be promoted by enhancing opportunities for education and training, building and sharing scientific infrastructure, participating together in large-scale marine research programs and regional ocean observing systems, planning joint science events and publications, and developing sources of binational funding. Building Ocean Science Partnerships will be published in English and Spanish to make its contents widely accessible in the United States and Mexico.
Book Synopsis Indian Ocean Biogeochemical Processes and Ecological Variability by : Jerry D. Wiggert
Download or read book Indian Ocean Biogeochemical Processes and Ecological Variability written by Jerry D. Wiggert and published by John Wiley & Sons. This book was released on 2013-05-09 with total page 1037 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 185. Indian Ocean Biogeochemical Processes and Ecological Variability provides a synthesis of current knowledge on Indian Ocean biogeochemistry and ecology and an introduction to new concepts and topical paradigm challenges. It also reports on the development of more extensive/frequent observational capacity being deployed in the Indian Ocean. This represents the first collection of syntheses that emphasize a basin-wide perspective, and the contributing authors include some of the most esteemed oceanographers and Indian Ocean experts in the world. The volume is derived from invited plenary talks that were presented at the initial Sustained Indian Ocean Biogeochemistry and Ecosystem Research (SIBER) workshop held at the National Institute of Oceanography (NIO) in Goa, India, in October 2006. The volume discusses The overlying physical processes set by monsoonal forcing and how these control biological production and variability Nutrient cycling and limitation Pelagic carbon cycling and air-sea exchange Benthic biogeochemistry and ecology The impact of climate and human activities on biogeochemistry and ecosystems. The readership for this book will consist of academic and governmental researchers interested in exploring how oceanographic, atmospheric, and hydrological processes combine to establish the environmental setting that supports and drives the pelagic system and which are especially relevant to understanding the complex biogeochemical and ecological interactions in the Indian Ocean.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9251306079 Total Pages :654 pages Book Rating :4.2/5 (513 download)
Book Synopsis Impacts of climate change on fisheries and aquaculture by : Food and Agriculture Organization of the United Nations
Download or read book Impacts of climate change on fisheries and aquaculture written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2019-01-06 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report indicates that climate change will significantly affect the availability and trade of fish products, especially for those countries most dependent on the sector, and calls for effective adaptation and mitigation actions encompassing food production.
Author :Johann R.E. Lutjeharms Publisher :Springer Science & Business Media ISBN 13 :3540372121 Total Pages :334 pages Book Rating :4.5/5 (43 download)
Book Synopsis The Agulhas Current by : Johann R.E. Lutjeharms
Download or read book The Agulhas Current written by Johann R.E. Lutjeharms and published by Springer Science & Business Media. This book was released on 2006-08-26 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the research findings of 60 years, the author describes the origins of the Agulhas Current, its behaviour, its influence on the adjacent continental shelf, its effect on local weather and its role in linking the Indian and Atlantic Oceans. The text is well-illustrated and includes asides on the history of research on the Current. An exhaustive bibliography gives easy access to present knowledge on this important current system.
Download or read book Oceanic Abstracts written by and published by . This book was released on 1995-11 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ocean Biogeochemistry by : Michael J.R. Fasham
Download or read book Ocean Biogeochemistry written by Michael J.R. Fasham and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oceans account for 50% of the anthropogenic CO2 released into the atmosphere. During the past 15 years an international programme, the Joint Global Ocean Flux Study (JGOFS), has been studying the ocean carbon cycle to quantify and model the biological and physical processes whereby CO2 is pumped from the ocean's surface to the depths of the ocean, where it can remain for hundreds of years. This project is one of the largest multi-disciplinary studies of the oceans ever carried out and this book synthesises the results. It covers all aspects of the topic ranging from air-sea exchange with CO2, the role of physical mixing, the uptake of CO2 by marine algae, the fluxes of carbon and nitrogen through the marine food chain to the subsequent export of carbon to the depths of the ocean. Special emphasis is laid on predicting future climatic change.
Book Synopsis Patterns in the Ocean by : Andrew Bakun
Download or read book Patterns in the Ocean written by Andrew Bakun and published by . This book was released on 1996 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Status of Natural Resources on the High-seas by : Southampton Oceanography Centre
Download or read book The Status of Natural Resources on the High-seas written by Southampton Oceanography Centre and published by IUCN. This book was released on 2001 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
