Download or read book Stratigraphic Record of the Neogene Globorotalid Radiation planktonic Foraminiferida written by Richard Cifelli and published by . This book was released on 1986 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: The histories of lineages forming the Neogene globorotalid radiation in the planktonic foraminifera are reconstructed primarily from stratigraphic distributions. Data on major taxa are synthesized, with particular reference to the development of shell design, and related to biogeograpy and evolutionary strategies.The radiation was established about the base of the lower Miocene by three groups (Fohsella, Globorotalia zealandica lineage, and G. praescitula plexus), which probably arose from separate paragloborotalid lineages.Common trends (size increase, chamber compression, keel development, reduced wall relief) early in the radiation culminated in the evolution of disklike taxa which, since the middle Miocene, have been centered in the tropics. The later phase of the radiation (post middle Miocene) was marked by architectural diversification as spiroconical (e.g., G. margaritae), ventroconical (e.g., G. truncatulinoides), and globose (e.g., G. inflata) taxa arose. Architectural diversification may be linked with watermass differentiation in the late Neogene.Neogene designs have close counterparts in the earlier, but phyletically isolated, Paleogene and Cretaceous radiations. There are also resemblances in ontogenetic strategies and lineage histories. Common adaptations are suggested, but specific functional explanations have not been established.Periods of major redesign are recognized in most lineages and are not confined to speciation events. Examples of stasis in adult morphology occur particularly in taxa that have evolved compressed, keeled shells. Bifurcations in lineages are indistinctly represented by wide spectra of morphotypes. Within the radiation very rapid speciation events are conspicuously absent, although they possibly occurred at the origin of some lineages. The distinctly sluggish tempo of change may be due to large population sizes and their degree of intercommunication. Good examples of allopatric and parapatric speciation were not found, but the prevalence of polytypic taxa, often distributed in contiguous populations showing clinal variation, would favor the inception of parapatric speciation.

Download or read book Modern Planktonic Foraminifera written by Christoph Hemleben and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a single volume, the authors bring together a review of current biological understanding of planktonic foraminifera and apply it to developments in sedimentology. With the growing interest in the shells of this class of protozoa as indicators of the history of the earth, revealed through the sedimentary record, a comprehensive analysis of the biology of contemporary foraminifera has become necessary. Main topics covered include Taxonomy, Collecting and Culture Methods, Cellular Ultrastructure, Host and Symbiont Relationships, Trophic Activity and Nutrition, Reproduction, Shell Ontogeny and Architecture, Ecology and Sedimentation and Settlement of Shells.

Download or read book Modern Foraminifera written by Barun K. Sen Gupta and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).

Download or read book Biotic Response to Global Change written by Stephen J. Culver and published by Cambridge University Press. This book was released on 2006-12-14 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concern about the effects of global change on our planet's future has driven much research into the last few thousand years of earth history. In contrast, this volume takes a much longer viewpoint to provide a historical perspective to recent and future global change. Over 40 international specialists investigate the reaction of life to global environmental changes, from Cretaceous times to the turn of the century. During this time earth's climate has changed from a very warm, 'greenhouse' phase with no significant ice sheets to today's 'ice-house' world. A wide spectrum of animal, plant and protistan life is discussed, encompassing terrestrial, shallow-marine and deep-marine realms. Each chapter considers a particular taxonomic group, looking first at the general picture and then focusing on more specialized aspects such as extinctions, diversity and biogeography. This volume will form an invaluable reference for researchers and graduate students in paleontology, geology, biology, oceanography and climatology.

Download or read book Department of the Interior and Related Agencies Appropriations for 1988 Department of Energy written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 1987 with total page 1438 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microdistribution of Foraminifera in a Single Bed of the Monterey Formation Monterey County California written by Daryl P. Domning and published by . This book was released on 1969 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Smithsonian Contributions to Paleobiology written by and published by . This book was released on 1984 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Resolution Stratigraphy written by E. A. Hailwood and published by Geological Society Publishing House. This book was released on 1993 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Planktonic Foraminifers as Tracers of Ocean climate History written by Gerard Johannes Augustinus Brummer and published by . This book was released on 1988 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pacific Neogene written by Ryūichi Tsuchi and published by . This book was released on 1992 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Zealand Journal of Geology and Geophysics written by and published by . This book was released on 2002-03 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1986 with total page 1400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1986-07 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book South African Journal of Geology written by and published by . This book was released on 1989 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A History of the Classification of Foraminifera 1826 1933 written by and published by . This book was released on 1990 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Antarctica at the Close of a Millennium written by John Alan Gamble and published by . This book was released on 2002 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accompanied by map in back inside cover pocket entitled: Geology of the Northern Vestfold Hills, East Antarctica, 1st ed., 2001.

Download or read book Bulletin written by and published by . This book was released on 2002 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: