Journal of Foraminiferal Research最新文献

{"title":"Photochemical Efficiencies of Diatom Symbionts in Hospite in Amphistegina Gibbosa (foraminifera) Across Seasons in the Florida Keys, Usa","authors":"Natasha Méndez-Ferrer, P. Hallock, David L. Jones","doi":"10.2113/GSJFR.48.1.4","DOIUrl":"https://doi.org/10.2113/GSJFR.48.1.4","url":null,"abstract":"","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2113/GSJFR.48.1.4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68291673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Alicantina, A New Eocene Planktonic Foraminiferal Genus For the Lozanoi Group","authors":"D. Soldan, M. Petrizzo, I. P. Silva","doi":"10.2113/GSJFR.48.1.41","DOIUrl":"https://doi.org/10.2113/GSJFR.48.1.41","url":null,"abstract":"","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2113/GSJFR.48.1.41","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68291364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Benthic Foraminifera in Hypersaline Salwa Bay (saudi Arabia): an Insight Into Future Climate Change in the Gulf Region?","authors":"A. Amao, M. Kaminski, L. Babalola","doi":"10.2113/GSJFR.48.1.29","DOIUrl":"https://doi.org/10.2113/GSJFR.48.1.29","url":null,"abstract":"","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2113/GSJFR.48.1.29","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68291534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Taxonomic and Nomenclatural Justification For the Triassic Meandrospiral Foraminiferal Genus Citaella Premoli Silva, 1964","authors":"K. Ueno, Akira Miyahigashi, R. Martini","doi":"10.2113/GSJFR.48.1.62","DOIUrl":"https://doi.org/10.2113/GSJFR.48.1.62","url":null,"abstract":"Taxonomy and nomenclature of Triassic meandrospiral foraminifers have been confused for a long time and they have been misinterpreted to relate to Cretaceous Meandrospira in most studies. We comprehensively reviewed their research history, considering morphology, phylogenetic relation, taxonomy, and nomenclature. This allowed us to confirm their original porcelaneous wall composition based on wellpreserved specimens, and to legitimize the use of the generic name Citaella Premoli Silva, 1964 for Triassic meandrospiral foraminifers. Citaella is here redefined as a miliolate genus having a porcelaneous shell and typicalmeandrospiral arrangement in its tubular deuteroloculus. The genus is restricted in the late Early to early Middle Triassic (Olenekian–Anisian) of the Tethyan realm. It was likely derived from a cornuspiroidean ancestor in earliestTriassic time, although the ancestral taxon is still unclear. Citaella gave rise to two descendant genera, Meandrospiranella and Turriglomina, in the early– middle Anisian. These three taxa formed a single phylogenetic clade in the Triassic, to which the subfamily Turriglomininae Zaninetti 1987 is best applicable. Citaella is phylogenetically distinct fromits homeomorphicmiliolate genera Streblospira in the Early Permian and Meandrospira in the Early Cretaceous, although they have the same wall compositions and very similar arrangement patterns in deuteroloculi. After scrutinizing literature, we recognized four distinct species in the genus Citaella including one with questionable generic assignment. We also made taxonomic emendation of the subfamily Turriglomininae and the genus Citaella, and demonstrated nomenclatural precedency of Citaella pusilla over other synonymous species that were proposed simultaneously in the same article.","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2113/GSJFR.48.1.62","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68291250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent Arborescent Dendrophryid Foraminifera Found On Upper Pleistocene Cold-water Corals from the Inner Sea of the Maldives","authors":"M. Reolid, J. Reolid, Dorothea Bunzel, M. Kaminski, C. Betzler","doi":"10.2113/GSJFR.48.1.53","DOIUrl":"https://doi.org/10.2113/GSJFR.48.1.53","url":null,"abstract":"","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68291583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"2017 Joseph A. Cushman Award To Bruce W. Hayward","authors":"M. Buzas, S. Culver, J. Lipps","doi":"10.2113/GSJFR.48.1.1","DOIUrl":"https://doi.org/10.2113/GSJFR.48.1.1","url":null,"abstract":"","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2113/GSJFR.48.1.1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68290940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Is Untreated Sewage Impacting Coral Reefs of Caye Caulker, Belize?","authors":"Kristen Lynn Emrich, M. Martínez-Colón, Henry Alegria","doi":"10.2113/GSJFR.47.1.20","DOIUrl":"https://doi.org/10.2113/GSJFR.47.1.20","url":null,"abstract":"Pollution from untreated human sewage is one of several environmental concerns in the coastal waters of Belize. This study utilized distributions of fecal sterols and foraminiferal assemblages to determine if human sewage is affecting the coral reef system off the coast of Caye Caulker, Belize. A total of 125 sediment samples were collected from which fecal sterol concentrations (coprostanol, cholestanol and cholesterol) and diagnostic stanol ratios, sediment texture (% mud), and foraminiferal ecological indices, including species richness, density, and diversity, and the FORAM Index (FI), were assessed. Elevated concentrations of coprostanol were primarily found inshore, with 20 samples exceeding 100 ng/g. The two stanol ratios, evaluated together, confirmed presence of human sewage at 17 sites. Foraminiferal assemblages were dominated by Quinqueloculina, Trochulina , Archaias and Asterigerina . Predominance of sand-sized sediments and the prevalence of Trochulina rosea and Asterigerina carinata reflected the active hydrodynamic regime, particularly on the eastern side of the caye. While the FI values overall indicated that water quality is conducive to reef growth and recovery, data from 37 samples indicated that the area is experiencing environmental change, especially on the southwestern side. Significant positive correlations were found between coprostanol and both foraminiferal density and diversity, while coprostanol and FI were negatively correlated. These results indicate that human sewage is inducing nutrification, which may be promoting reported increases in macroalgal abundances throughout Belize, though the active wave and current regimes are limiting the impacts on the eastern, Caribbean-facing side of Caye Caulker.","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2113/GSJFR.47.1.20","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68290813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Help Index: Hoeglundina Elegans Preservation Index For Marine Sediments in the Western South Atlantic","authors":"Mariane V. Gonzales, F. K. D. Almeida, K. B. Costa, A. C. Santarosa, E. Camillo, J. Quadros, F. Toledo","doi":"10.2113/GSJFR.47.1.56","DOIUrl":"https://doi.org/10.2113/GSJFR.47.1.56","url":null,"abstract":"The purpose of this study is to evaluate the abundance and preservation state of the tests of Hoeglundina elegans , with the goal to propose a new preservation index for deep-sea sediments. In seawater, aragonite is more soluble than calcite; the benthic foraminiferal species H. elegans produces aragonitic tests, thereby providing potential proxies for subtle variations in carbonate preservation. Using two proxies based on H. elegans , as well as three other carbonate-dissolution proxies, we interpret the main drivers of carbonate dissolution in the western South Atlantic Ocean from a core, GL-854 (water depth 2220 m) from the western South Atlantic Ocean, Santos Basin. The H. elegans (>150 μm) abundance and the HelP Index ( Hoeglundina elegans Preservation Index), based on five test-preservation degrees, were assessed to determine the state of aragonite preservation. Images were taken using SEM to demonstrate each degree of preservation and to observe the ultrastructural breakdown of the tests’ walls. The other parameters determined were planktonic foraminiferal Fragmentation Index (FI), %CaCO3 and sand fraction (>63 μm). The H. elegans abundance, HelP Index, and sand fraction correlated positively, and those proxies correlated inversely with the FI. The weakest correlations were between %CaCO3, and the other proxies. Subtle differences in proxy responses were consistent with specific stages of carbonate dissolution, ranging from the aragonite lysocline to the Calcite Compensation Depth. The results revealed alternating modes of high and low carbonate preservation throughout the core and the primary driver of carbonate dissolution appeared to be variation in the aragonite saturation state influenced by circulation-induced changes in water masses. The carbonate dissolution observed in specific intervals, probably due to shoaling of the Aragonite Compensation Depth, suggests a mixing zone with more corrosive southern-sourced water and less corrosive northern-sourced water at the depth where the core was located.","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2113/GSJFR.47.1.56","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68291120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Memorial To Robert G. Douglas (1937–2016)","authors":"F. Staines, H. Weissert, B. Huber, Óscar González Yajimovich, H. LippsJere","doi":"10.2113/GSJFR.47.1.3","DOIUrl":"https://doi.org/10.2113/GSJFR.47.1.3","url":null,"abstract":"Robert G. (Bob) Douglas, an internationally recognized micropaleontologist and marine geologist, passed away on January 26, 2016, after a long battle with cancer. During his career he pursued a diverse range of research interests, including the study of living foraminifera and modern environments, Cretaceous foraminiferal biostratigraphy, Cretaceous and modern paleoceanography and biogeography, and more. He published an extensive series of important and highly-cited articles, and he sat on a number of editorial boards and international scientific committees. Within every group that included Bob as a member, he was quickly recognized as a natural leader and a wise counselor. He was also a warm, thoughtful person with a great sense of humor and humility. A South Bay native, Bob’s interest in geology began during his childhood growing up in Palos Verdes, California. He and his brothers would hike around the Palos Verdes Peninsula, playing in the canyons, finding rocks, arrowheads and fossils, which sparked his curiosity, and ultimately lead him into a career in the Earth Sciences. He graduated from Redondo Union High School in 1955, and received his bachelor’s degree in Geology from the University of California at Santa Barbara in 1959. After graduating from UCSB, Bob worked as a geologist in Shell Oil’s Alaska Division before earning his PhD from the University of California at Los Angeles in 1966. At UCLA, Bob was part of the first group of graduate students working under the guidance of his PhD supervisor at UCLA, Helen N. Tappan. There Bob participated in seminars on micropaleontology and marine geology and in field trips to the coast that inspired his later work. Helen and her husband Alfred R. Loeblich Jr., who at the time was a chief scientist for oil exploration at Chevron Research Lab in La Habra, California, and …","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2113/GSJFR.47.1.3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68290920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Benthic Foraminifera Indicate Environmental Stress from River Discharge To Marine Ecosystems: Example from the Black Sea","authors":"V. Yanko-Hombach, T. Kondariuk, I. Motnenko","doi":"10.2113/GSJFR.47.1.70","DOIUrl":"https://doi.org/10.2113/GSJFR.47.1.70","url":null,"abstract":"The focus of this research was to investigate how the Danube River discharge influences environmental conditions and benthic ecosystems on the Black Sea shelf using foraminifera to delineate affected areas. Specific goals included: (1) to examine the taxonomic composition, quantitative distributions, and test morphologies in foraminiferal assemblages; (2) to correlate them with environmental (oceanographic, geochemical, sedimentological) parameters; (3) to identify the main factors associated with changes in foraminiferal distributions; and (4) to identify assemblages and species that indicate environmental changes along the gradient from delta front to unaffected shelf. Foraminiferal assemblages revealed the influence on the benthic ecosystem of the discharge of water and sediments enriched with organic and inorganic compounds from the Danube delta. Three foraminiferal assemblages were recognized, indicating strong (assemblage Ammonia tepida ), weak (assemblage A. compacta ), and undetectable (assemblage A. ammoniformis ) deltaic influence as a function of distance from shore. Sites strongly influenced were characterized by lower diversity and species richness as well as dominance by A. tepida and Porosononion subgranosus mediterranicus . These species are tolerant of fluctuations in salinity and sedimentation, and thrive on labile organic carbon produced by abundant phytoplankton fertilized by nutrients in the fluvial discharge. The boundary between strong and weak influence on bottom ecosystems occurs at the 25 m isobath, which coincides with the distal zone of the delta front. The boundary between weak and no influence coincides with the frontal zone of the prodelta. No fluvial influence was detected on the outer shelf. The progression of foraminiferal assemblages, A. tepida to A. compacta to A. ammoniformis , and the increase of polyhaline Lagenida in the assemblages seawards, indicates that organic carbon flux is the dominant factor. Other factors, such as salinity and oxygen depletion, seem to play secondary roles, while the type of substrate likely contributes primarily to the diversity of microhabitats within the benthic ecosystems, with muddy delta front sediments providing fewer microhabitats than mixed mud and molluscan shells found on the outer shelf.","PeriodicalId":54832,"journal":{"name":"Journal of Foraminiferal Research","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2113/GSJFR.47.1.70","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68290783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}