Environmental Factors Causing Distributions Of Recent Foraminifera
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Environmental Factors Causing Distributions Of Recent Foraminifera
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Author : Gary Oliver George Greiner
language : en
Publisher:
Release Date : 1969
Environmental Factors Causing Distributions Of Recent Foraminifera written by Gary Oliver George Greiner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Foraminifera categories.
Environmental Factors Controlling The Distribution Of Recent Benthonic Foraminifera
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Author : Gary Oliver George Greiner
language : en
Publisher:
Release Date : 1974
Environmental Factors Controlling The Distribution Of Recent Benthonic Foraminifera written by Gary Oliver George Greiner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Foraminifera categories.
Ecology And Distribution Of Recent Foraminifera
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Author : Fred B. Phleger
language : en
Publisher:
Release Date : 1960
Ecology And Distribution Of Recent Foraminifera written by Fred B. Phleger and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Science categories.
Environmental Factors Affecting Planktonic Foraminifera Abundance And Distribution In The Northeast Gulf Of Mexico
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Author : Sharath Reddy Ravula
language : en
Publisher:
Release Date : 2005
Environmental Factors Affecting Planktonic Foraminifera Abundance And Distribution In The Northeast Gulf Of Mexico written by Sharath Reddy Ravula and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
The shell composition of planktonic foraminifera used in many paleoreconstructions assumes they are accurately representing conditions at the surface/mixed layer. However, planktonic foraminifera are known to inhabit a depth range that extends below the mixed layer. In the present study, foraminifera were collected at discrete depth intervals using a Multiple Opening and Closing Net Environmental Sensing System (MOCNESS) in either cyclonic or anticyclonic eddies that had contrasting environmental conditions. The foraminifera abundances and distributions were compared to the water depth, temperature, density, and chlorophyll profiles. Nine species were found consistently among all the tows and composed at least 96% of the species found, though a shift in the species abundances and depths occurred between eddies. Species occurred where physical factors were compatible with conditions and feeding opportunities they were adapted to. Three species pink and white Globigerinoides ruber and Globigerinoides sacculifer thrived best when a steep density gradient resulted in a shallower mixed-layer that restricted them under more intense light and allowed them to better exploit their algae symbionts. Globigerina bulloides was found outside its sub-polar habitat because the waters of the cyclones were cool enough (less than 26°C) at the same depths that sufficient chlorophyll was available. Two species Orbulina universa, and Globorotalia menardii were consistently absent in the mixed layer, but tracked deeper chlorophyll concentrations. Three other species were found inconsistently among the tows: Hastigerina pelagica, Globigerinella siphonifera, and Globigerinella calida. H. pelagica probably follows chlorophyll concentrations. G. siphonifera, and G. calida have a preference for deeper waters within the photic zone. The drastic doubling to tripling of the foraminifera abundances in cyclones biases downcore reconstructions of sea surface temperature towards cooler conditions. Also, the shift in species composition between the two eddies indicates that in environments where eddies, upwellings, or rings exist may bias the downcore composition of each species towards cooler conditions. G. sacculifer was found to live primarily in the mixed layer and at least 75% of its downcore individuals are expected to represent conditions there. Researchers should consider the described species distributions to better understand the water column conditions they are reconstructing.
Benthic Foraminiferal Ecology
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Author : Patrícia Pinheiro Beck Eichler
language : en
Publisher: Springer Nature
Release Date : 2020-12-20
Benthic Foraminiferal Ecology written by Patrícia Pinheiro Beck Eichler and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-20 with Science categories.
This book provides effective statistical analyses in benthic foraminiferal communities patterns and show solutions for sea-land processes and alterations caused by climate changes and other local (and global) environmental concerns. Our goal is to provide, through these chapters, the monitoring and forecasting of environmental impacts with accurate data. We identify global regions most subject to industrial pollution, contamination and sewage, identifying potential sites prone to accumulate organic matter, which effects erosion, deposition, ocean temperature and pH changes (warming, cooling, acidification), climate and sea-level changes. Benthic habitats, specifically foraminiferal (single celled microorganisms found in the water column and sediment) contribute to our understanding of local and global climate change that effect at risk communities. Derived through the accuracy of oceanographic climate science, allow us to predict with the intention to alleviate potential loss in coastal areas, which are, the most vulnerable to ocean warming, cooling, acidification, and sea-level rise impacts. We unravel the mystery of the Environmental Impacts and Climate Change, helping communities prepare, adjust, adapt, and minimize effects or remediate loss. We show how to pinpoint the most vulnerable and specific sites for economic and social damage and loss, using foraminifera, an inexpensive and easily handled proxy valuable for monitoring coastal and marine environmental stressors. The implications of those problems and the ability to forecast patterns on land are primary issues we address by studying marine sediment of beaches, estuaries, bays and deep water worldwide. Ecology, biology, life history, and taxonomy of modern Foraminifera allows us to examine the current and historical record of environmental change effects, and predict implications for future sea-level rise, and ocean patterns. The prediction of responses of interacting systems to these problems, and development of strategies is needed to inform leadership with the knowledge and data to effectively implement policy, making this book a very informative and significant contribution for researchers and decision makers.
The Distribution Of Recent Foraminifera In Southeast Baffin Bay
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Author : Howard Richard Hume
language : en
Publisher:
Release Date : 2017
The Distribution Of Recent Foraminifera In Southeast Baffin Bay written by Howard Richard Hume and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
In a study of foraminiferal distribution in southeast Baffin Bay and the associated environmental parameters, 44 grab samples and 4 cores were analysed for their foraminiferal and sediment contents. Environmental parameters studied were bathymetry, sediment distribution and calcium carbonate content of the sediments. Of the environmental factors considered depth and substrate were found to be most closely associated with foraminiferal distribution, with the sediment type related to the source of sedimentary particles and the prevailing currents. A foraminiferal depth zonation based on the grouping of stations with like faunas was worked out and showed: a shallow water (40-250 metres) diverse calcareous fauna dominated by Cibicides lobatulus and Astrononion gallowayi; an intermediate depth (150-400 metres) arenaceous fauna with Adercotryma glomeratum, Textularia torquata, Trochammina nana and Spiroplectammina biformis dominant; a deep water (300-750 metres), very sparse mixed fauna with calcareous specimens in the majority and Melonis zaandami a common species. In the core samples arenaceous Foraminifera virtually disappear at distances greater than 5-10 cm below the top, probably as a result of mechanical or chemical disintegration soon after burial, caused by compaction of the sediments or the action of annelids or both. Accordingly only calcareous assemblages could be considered for further paleoenvironmental reconstructions. Planktonic foraminiferal tests were rare in the sediments despite being present in the water column in the area. Tests were almost all Globigerina pachyderma and were found in the more calcareous benthonic populations. The inorganic calcium carbonate content of the sediments was found to be closely associated with the calcareous foraminiferal content, indicating a negligible carbonate contribution to the sediments from terrestrial sources. The application of Similarity Analysis and Group Average Sorting techniques gives a grouping of stations with like faunal assemblages similar to that obtained from a visual inspection of the raw data, but these techniques also extract some finer distinctions not otherwise obvious. This indicates that Similarity and Cluster Analyses, and statistical techniques are valuable for studies using larger amounts of more complex data.
Geological Survey Bulletin
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Author :
language : en
Publisher:
Release Date : 1973
Geological Survey Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Geology categories.
Modern Foraminifera
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Author : Barun K. Sen Gupta
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-05-08
Modern Foraminifera written by Barun K. Sen Gupta and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-05-08 with Science categories.
From the reviews: "This is now the definitive, authoritative text on applied foraminiferal micropaleontology and should be in the library of all practicing micropaleontologists." (William A. Berggren, Woods Hole Oceanographic Institution in Micropaleontology, 47:1 (2001)"During the last 20 years there has been an explosion of publications about foraminifera from an amazing variety of disciplines: basic cell biology, algal symbiosis, biomineralization, biogeography, ecology, pollution, chemical oceanography, geochemistry, paleoceanography, and geology. This book summarizes contributions by leading researchers in these diverse fields. It is not just another text on the biology of foraminifera. Rather, Barun Sen Gupta has accomplished his objective to "write an advanced text for university students that would also serve as a reference book for professionals"." (Howard J. Spero, University of California at Davis in Limnology and Oceanography, 45:8 (2000).
Relationships Between The Distribution Of Selected Taxa Of Recent Benthic Foraminifera And Measured Environmental Parameters In Timbalier Bay Louisiana
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Author : Christopher L. Ostrom
language : en
Publisher:
Release Date : 1974
Relationships Between The Distribution Of Selected Taxa Of Recent Benthic Foraminifera And Measured Environmental Parameters In Timbalier Bay Louisiana written by Christopher L. Ostrom and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Foraminifera categories.
Distribution Of Recent Benthic Foraminifera In The Caribbean Region
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Author : Stephen J. Culver
language : en
Publisher:
Release Date : 1982
Distribution Of Recent Benthic Foraminifera In The Caribbean Region written by Stephen J. Culver and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Science categories.