Physical-biological Interactions on Georges Bank and Its Environs PDF Download
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Author: Peter H. Wiebe
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 570
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Book Description
Author: Peter H. Wiebe
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 570
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Book Description
Author: Craig Van de Water Lewis
Publisher:
ISBN:
Category : Biology
Languages : en
Pages : 594
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Book Description
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.
Author: B.J. Rothschild
Publisher: Springer Science & Business Media
ISBN: 9400930232
Category : Science
Languages : en
Pages : 658
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Book Description
Proceedings of the NATO Advanced Research Workshop, Castéra-Verduzan, France, June 1-5, 1987
Author: Woods hole oceanographic institution ma
Publisher:
ISBN:
Category :
Languages : en
Pages : 211
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Book Description
Losses of bank water because of strong winter wind forcing were hypothesized to he a factor limiting recruitment of Georges Bank communities. These alterations in bank trophic structure may reduce recruitment of higher trophic levels. NPZ and copepod stage structure models embedded in stratified flow over an idealized bank indicate that strong storms (13 m/s wind for 20 days) can cause replacement of bank water and loss of plankton. Arctica islandica on Georges Bank appear primarily below 50 meters and are densest on the South Flank. Observed age and size structures suggest only one cohort, spawned in 1986, was detected in 1982-94 surveys of the bank. Larval transport was modeled using tide and realistic winds from three winters. Variability in Ekman transport frequently overwhelmed tidal rectification and residual flow. Population model predictions were compared with NMFS survey observations; correlation of models with data was best for simulations from 1974 and 1991. Projection matrix eigenvalues were most sensitive to changes in adult and larval survival, planktonic duration and changes affecting the Northeast Peak. This work indicates (1) that winter wind variability alters plankton transport and (2) that interannual differences in recruitment and plankton dynamics may depend on that variability.
Author: Peter H. Wiebe
Publisher:
ISBN:
Category : Plankton
Languages : en
Pages : 716
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Book Description
Author: Maurice Neville Hill
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 670
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Book Description
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.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
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Book Description
The R/V ATLANTIS II cruise to New York Bight and Georges Bank during the spring of 1978 was part of a study of the physical, chemical, and biological interactions between these two regions.
Author: Allan R. Robinson
Publisher: Wiley
ISBN: 9780471189015
Category : Science
Languages : en
Pages : 668
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Book Description
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.
Author: K. H. Mann
Publisher: John Wiley & Sons
ISBN: 1118687914
Category : Science
Languages : en
Pages : 512
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Book Description
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
Author: United States. Congress. Senate. Select Committee on Small Business
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 224
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Book Description
