Biological-physical Interactions on Georges Bank

Biological-physical Interactions on Georges Bank
Author: Craig Van de Water Lewis
Publisher:
Total Pages: 594
Release: 1997
Genre: Biology
ISBN:

Advective losses of bank water during winter because of strong wind forcing were hypothesized to be a significant factor limiting recruitment of Georges Bank cormnunities. This hypothesis was examined using biological-physical models of bank circulation with wind, tidal, and density driven circulation resembling winter conditions. Mode ls of stratification-driven flow over an idealized bank addressed effects of storms on the spring plankton bloom. An NPZ model and a copepod stage structure model were mode led as passive tracers. Results indicate that strong storms (13 m/s wind for 20 days) can cause marked replacement of bank water and loss of zooplankton and phytoplankton. These alterations in bank trophic structure may impair energy transfer from primary to secondary production and reduce recruitment of higher trophic levels. Georges Bank Arctica islandica abundance data indicates that adults appear primarily below 50 meters, with highest abundances on the South Flank. Age and size structures suggest that a large cohort, detected on the southeast flank in 1992 and 94 surveys, was spawned in 1986; no other comparable recruitment was seen. Larval transport was modeled using tidal forcing and winter wind data from 1974, 1978, and 1991. This work revealed that modeled transport driven by vector-averaged and realistic winds from the same periods differed. Circulation using realistic winds was highly variable; Ekman transport frequently overwhelmed tidal rectification and reversed the residual flow for several days. Transport and matrix mode ls of Arctica populations were compared with field data; correlation of models with NMFS Survey data was best for realistic wind simulations from 1974 and 1991. Projection matrix eigenvalues were most sensitive to changes in adult and larval survival and planktonic duration. Lower wind models identified the NE Peak region as having the highest reproductive value and sensitivity. This work indicates that winter wind forcing is a factor determining transport of plankton. Models suggest that interannual differences in Georges Bank transport depend partially on temporal wind variability. They indicate that the Northeast Peak may be a source region for larvae and that Arctica research should focus on adult survival and planktonic mortality and duration.

The Sea, Biological-Physical Interactions in the Sea

The Sea, Biological-Physical Interactions in the Sea
Author: Allan R. Robinson
Publisher: Wiley
Total Pages: 668
Release: 2002-02-11
Genre: Science
ISBN: 9780471189015

This book is the third in a new sequence of volumes of The Sea to be edited by Dr. Allan Robinson and a new, distinguished editorial board. As oceanography has matured over recent decades, the once separate interests of chemical, biological, and physical oceanographers have converged. These volumes reflect the change in attitude in oceanography to a solid, interdisciplinary approach.

The Sea, Biological-Physical Interactions in the Sea

The Sea, Biological-Physical Interactions in the Sea
Author: Maurice Neville Hill
Publisher:
Total Pages: 670
Release: 2002
Genre: Science
ISBN:

This book is the third in a new sequence of volumes of The Sea to be edited by Dr. Allan Robinson and a new, distinguished editorial board. As oceanography has matured over recent decades, the once separate interests of chemical, biological, and physical oceanographers have converged. These volumes reflect the change in attitude in oceanography to a solid, interdisciplinary approach.

Marine Geomorphometry

Marine Geomorphometry
Author: Vanessa Lucieer
Publisher: MDPI
Total Pages: 400
Release: 2019-06-25
Genre: Technology & Engineering
ISBN: 3038979546

Geomorphometry is the science of quantitative terrain characterization and analysis, and has traditionally focused on the investigation of terrestrial and planetary landscapes. However, applications of marine geomorphometry have now moved beyond the simple adoption of techniques developed for terrestrial studies, driven by the rise in the acquisition of high-resolution seafloor data and by the availability of user-friendly spatial analytical tools. Considering that the seafloor represents 71% of the surface of our planet, this is an important step towards understanding the Earth in its entirety. This volume is the first one dedicated to marine applications of geomorphometry. It showcases studies addressing the five steps of geomorphometry: sampling a surface (e.g., the seafloor), generating a Digital Terrain Model (DTM) from samples, preprocessing the DTM for subsequent analyses (e.g., correcting for errors and artifacts), deriving terrain attributes and/or extracting terrain features from the DTM, and using and explaining those terrain attributes and features in a given context. Throughout these studies, authors address a range of challenges and issues associated with applying geomorphometric techniques to the complex marine environment, including issues related to spatial scale, data quality, and linking seafloor topography with physical, geological, biological, and ecological processes. As marine geomorphometry becomes increasingly recognized as a sub-discipline of geomorphometry, this volume brings together a collection of research articles that reflect the types of studies that are helping to chart the course for the future of marine geomorphometry.

Food Chains, Yields, Models, And Management Of Large Marine Ecosoystems

Food Chains, Yields, Models, And Management Of Large Marine Ecosoystems
Author: Kenneth Sherman
Publisher: Routledge
Total Pages: 314
Release: 2019-05-20
Genre: Nature
ISBN: 0429715269

Draws on case studies from tropical, temperate, and Arctic waters around the world, comparing multispecies biomass yield models for various large marine ecosystems. Emphasis is given to adaptive management as a strategy for maximizing the sustainability and productivity of living marine resources.

Dynamics of Marine Ecosystems

Dynamics of Marine Ecosystems
Author: K. H. Mann
Publisher: John Wiley & Sons
Total Pages: 512
Release: 2013-04-16
Genre: Science
ISBN: 1118687914

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

ICES Zooplankton Methodology Manual

ICES Zooplankton Methodology Manual
Author: Roger Harris
Publisher: Elsevier
Total Pages: 707
Release: 2000-02-14
Genre: Science
ISBN: 0080495338

The term "zooplankton" describes the community of floating, often microscopic, animals that inhabit aquatic environments. Being near the base of the food chain, they serve as food for larger animals, such as fish. The ICES (International Council for the Exploration of the Sea) Zooplankton Methodology Manual provides comprehensive coverage of modern techniques in zooplankton ecology written by a group of international experts. Chapters include sampling, acoustic and optical methods, estimation of feeding, growth, reproduction and metabolism, and up-to-date treatment of population genetics and modeling. This book will be a key reference work for marine scientists throughout the world. - Sampling and experimental design - Collecting zooplankton - Techniques for assessing biomass and abundance - Protozooplankton enumeration and biomass estimation - New optical and acoustic techniques for estimating zooplankton biomass and abundance - Methods for measuring zooplankton feeding, growth, reproduction and metabolism - Population genetic analysis of zooplankton - Modelling zooplankton dynamics This unique and comprehensive reference work will be essential reading for marine and freshwater research scientists and graduates entering the field.