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Journal articles on the topic 'Foraminiferos'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Isakova, Tatiana Nikolaevna, Tatiana Valerievna Filimonova та Elena Ivanovna Kulagina. "ОСОБЕННОСТИ ТАКСОНОМИЧЕСКОГО РАЗНООБРАЗИЯ РАННЕПЕРМСКИХ ФОРАМИНИФЕР БАШКИРСКИХ ШИХАНОВ ГЕОПАРКА ТОРАТАУ (ON THE TAXONOMICAL DIVERSITY OF THE EARLY PERMAN FORAMINIFERA OF THE BASHKIR SHIKHANS IN THE TORATAU GEOPARK)". Geologicheskii vestnik, № 2 (14 липня 2023): 94–115. http://dx.doi.org/10.31084/2619-0087/2023-2-7.

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Изучены ассоциации фораминифер из нижнепермских отложений рифовых массивов Торатау, Куштау и Юрактау. Определен их таксономический состав с учетом данных, ранее опубликованных предшествующими исследователями. Уникальной особенностью сообществ фораминифер (фузулинид и мелких фораминифер) Башкирских шиханов является неповторимый смешанный состав комплексов. В сообществах фораминифер присутствуют таксоны как широко латерально распространенные, так и эндемики; как виды северных акваторий, так и виды области Палеотетис. Таксономический состав фораминифер включает свыше 50 родов и более 180 видов. П

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Glock, Nicolaas, Julia Wukovits, and Alexandra-Sophie Roy. "Interactions of Globobulimina Auriculata with Nematodes: Predator Or Prey?" Journal of Foraminiferal Research 49, no. 1 (2019): 66–75. http://dx.doi.org/10.2113/gsjfr.49.1.66.

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Abstract Studies of carnivorous behaviour of benthic foraminifers are rare and mostly focused on laboratory experiments. Controlled experiments have shown that some agglutinated and intertidal species prey on meio- to macrofaunal metazoans. Here we present observations of the behaviour of specimens of the infaunal benthic foraminiferal species, Globobulimina auriculata and G. turgida, made within several hours of collection from ∼117 m depth in the Alsbäck Deep of the Gullmar Fjord, Sweden. We observed live nematodes within the tests of G. auriculata. Video observations recorded over a 17-hour

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Roy, T., F. Lombard, L. Bopp, and M. Gehlen. "Projected impacts of climate change and ocean acidification on the global biogeography of planktonic Foraminifera." Biogeosciences 12, no. 10 (2015): 2873–89. http://dx.doi.org/10.5194/bg-12-2873-2015.

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Abstract. Planktonic Foraminifera are a major contributor to the deep carbonate flux and their microfossil deposits form one of the richest databases for reconstructing paleoenvironments, particularly through changes in their taxonomic and shell composition. Using an empirically based planktonic foraminifer model that incorporates three known major physiological drivers of their biogeography – temperature, food and light – we investigate (i) the global redistribution of planktonic Foraminifera under anthropogenic climate change and (ii) the alteration of the carbonate chemistry of foraminifera

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4

M. Natsir, Suhartati, and Ira Dillenia. "The Benthic Foraminiferal Assemblages in the Seagrass Bed of Tanjung Berakit Waters, Bintan Island." HAYATI Journal of Biosciences 30, no. 6 (2023): 1149–54. http://dx.doi.org/10.4308/hjb.30.6.1149-1154.

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Seagrass is the most common ecosystem in Tanjung Berakit waters. Therefore, Tanjung Berakit waters have a very important role as a benthic foraminiferal habitat. This study was conducted to describe the distribution of benthic foraminifera relating to the environmental condition of the waters. The samples were collected from eight stations by handling garb in November 2017. This study collected 18 species of shallow water benthic foraminifera dominated by Amphistegina and Heterostegina. This study recorded a correlation between the sediment texture and foraminiferal assemblages. The most commo

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Senowbari-Daryan, Baba, and Michael Link. "Foraminifera from the Norian–Rhaetian reef carbonates of the Taurus Mountains (Saklıkent, Turkey)." Geologica Carpathica 68, no. 4 (2017): 303–17. http://dx.doi.org/10.1515/geoca-2017-0021.

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AbstractNorian–Rhaetian reef carbonates are exposed in several localities in Taurus Mountains. They predominately contain hypercalcified sponges, followed by scleractinian corals and other less numerous organisms. A coherent Norian–Rhaetian reef structure is exposed near the small town of Saklıkent, west of Antalya. Foraminifers occur in reef carbonates of Saklıkent by numerous genera as shown in this paper. Two species —Siculocosta tauricaandSiculocosta sadati— are described as new. The foraminiferal association of Saklıkent is similar or almost identical to the associations known from the No

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6

Glock, Nicolaas, Alexandra-Sophie Roy, Dennis Romero, et al. "Metabolic preference of nitrate over oxygen as an electron acceptor in foraminifera from the Peruvian oxygen minimum zone." Proceedings of the National Academy of Sciences 116, no. 8 (2019): 2860–65. http://dx.doi.org/10.1073/pnas.1813887116.

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Benthic foraminifera populate a diverse range of marine habitats. Their ability to use alternative electron acceptors—nitrate (NO3−) or oxygen (O2)—makes them important mediators of benthic nitrogen cycling. Nevertheless, the metabolic scaling of the two alternative respiration pathways and the environmental determinants of foraminiferal denitrification rates are yet unknown. We measured denitrification and O2respiration rates for 10 benthic foraminifer species sampled in the Peruvian oxygen minimum zone (OMZ). Denitrification and O2respiration rates significantly scale sublinearly with the ce

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7

Martinez, Ana, Laura Hernández-Terrones, Mario Rebolledo-Vieyra, and Adina Paytan. "Impact of carbonate saturation on large Caribbean benthic foraminifera assemblages." Biogeosciences 15, no. 22 (2018): 6819–32. http://dx.doi.org/10.5194/bg-15-6819-2018.

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Abstract. Increasing atmospheric carbon dioxide and its dissolution in seawater have reduced ocean pH and carbonate ion concentrations, with potential implications on calcifying organisms. To assess the response of large Caribbean benthic foraminifera to low carbonate saturation conditions, we analyzed benthic foraminifers' abundance and relative distribution in surface sediments in proximity to low-carbonate-saturation submarine springs and at adjacent control sites. Our results show that the total abundance of large benthic foraminifera was significantly lower at the low-pH submarine springs

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8

Özkan, Recep. "Frasnian (Late Devonian) foraminiferal biostratigraphy from Taurides, southern Turkey." Stratigraphy 8, no. 4 (2011): 281–92. http://dx.doi.org/10.29041/strat.08.4.05.

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The stratigraphic sections Halevikdere, Kocadere and Eceli covering the Devonian succession in the Eastern and Central Taurides have been measured and studied for biostratigraphy, geochemistry, sedimentology and facies in the context of the project "Devonian Ecosystems andClimate of Turkey (DEVEC-TR)". TheDevonian sedimentary succession consists of carbonates and siliciclastic sediments mostly deposited in shallow marine environments. The samples taken from the carbonate beds throughout the sections reveal abundant and diverse assemblages of the foraminifera. This paper, however, includes the

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9

Roy, T., F. Lombard, L. Bopp, and M. Gehlen. "Projected impacts of climate change and ocean acidification on the global biogeography of planktonic foraminifera." Biogeosciences Discussions 11, no. 6 (2014): 10083–121. http://dx.doi.org/10.5194/bgd-11-10083-2014.

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Abstract. Planktonic foraminifera are a major contributor to the deep carbonate-flux and the planktonic biomass of the global ocean. Their microfossil deposits form one of the richest databases for reconstructing paleoenvironments, particularly through changes in their taxonomic and shell composition. Using an empirically-based foraminifer model that incorporates three known major physiological drivers of foraminifer biogeography – temperature, food and light – we investigate (i) the global redistribution of planktonic foraminifera under anthropogenic climate change, and (ii) the alteration of

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10

Pearson, Paul N. "Oxygen Isotopes in Foraminifera: Overview and Historical Review." Paleontological Society Papers 18 (November 2012): 1–38. http://dx.doi.org/10.1017/s1089332600002539.

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Foraminiferal tests are a common component of many marine sediments. The oxygen isotope ratio (δ18O) of test calcite is frequently used to reconstruct aspects of their life environment. The δ18O depends mainly on the isotope ratio of the water it is precipitated from, the temperature of calcification, and, to a lesser extent, the carbonate ion concentration. Foraminifera and other organisms can potentially preserve their original isotope ratio for many millions of years, although diagenetic processes can alter the ratios. Work on oxygen isotope ratios of foraminifera was instrumental in the di

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Keul, N., G. Langer, L. J. de Nooijer, and J. Bijma. "Effect of ocean acidification on the benthic foraminifera <i>Ammonia</i> sp. is caused by a decrease in carbonate ion concentration." Biogeosciences 10, no. 10 (2013): 6185–98. http://dx.doi.org/10.5194/bg-10-6185-2013.

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Abstract. About 30% of the anthropogenically released CO2 is taken up by the oceans; such uptake causes surface ocean pH to decrease and is commonly referred to as ocean acidification (OA). Foraminifera are one of the most abundant groups of marine calcifiers, estimated to precipitate ca. 50 % of biogenic calcium carbonate in the open oceans. We have compiled the state of the art literature on OA effects on foraminifera, because the majority of OA research on this group was published within the last three years. Disparate responses of this important group of marine calcifiers to OA were report

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12

Carreno, Analuisa L., J. Ledesma-Vazquez, C. F. Hernandez-Perez, and F. R. Gio-Argaez. "Microfossils from the Early Pliocene Carmen Formation, Monserrat Island, Baja California Sur, Mexico." Micropaleontology 61, no. 3 (2015): 199–225. http://dx.doi.org/10.47894/mpal.61.3.07.

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A stratigraphic section measured in the northern area of Monserrat Island, Baja California Sur, yielded abundant moderate to well-preserved benthic foraminifers, rare planktonic foraminifers, calcareous nannoplankton, and ostracods. Based on both planktonic microfossils, relative age situates the base of the section from the Uppermost Miocene to Lower Pliocene, while the top is Upper Zanclean (around 5.06-3.3 Ma). The abundant benthic foraminifer assemblage is characterized by small tests and a few dominant species, i.e. Bolivinella seminuda, Brizalina subadvena and Brizalina interjuncta. The

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Natsir, Suhartati M. "THE DISTRIBUTION OF BENTHIC FORAMINIFERA IN DAMAR ISLAND AND JUKUNG ISLAND, SERIBU ISLANDS." Marine Research in Indonesia 35, no. 2 (2010): 9. http://dx.doi.org/10.14203/mri.v35i1.10.

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Seribu Islands are archipelago within Jakarta Bay built upon the pleistocene coral formation of the Sunda Shelf. The islands are characterized by unique and high biodiversity such as coral reefs. Since coral reef degradation would lead to a decrease of human prosperity, the determination of the coral reef quality is of high importance. Foraminifera offers an early warning system for the coral reef condition, as exemplified by the FORAM Index, i.e. Foraminifera in Reef Assessment and Monitoring Index. This study compared the foraminiferal community structure and the FORAM Index of two islands b

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Natsir, Suhartati M. "THE DISTRIBUTION OF BENTHIC FORAMINIFERA IN DAMAR ISLAND AND JUKUNG ISLAND, SERIBU ISLANDS." Marine Research in Indonesia 35, no. 2 (2010): 9–14. http://dx.doi.org/10.14203/mri.v35i2.10.

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Seribu Islands are archipelago within Jakarta Bay built upon the pleistocene coral formation of the Sunda Shelf. The islands are characterized by unique and high biodiversity such as coral reefs. Since coral reef degradation would lead to a decrease of human prosperity, the determination of the coral reef quality is of high importance. Foraminifera offers an early warning system for the coral reef condition, as exemplified by the FORAM Index, i.e. Foraminifera in Reef Assessment and Monitoring Index. This study compared the foraminiferal community structure and the FORAM Index of two islands b

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15

Ivanova, Daria K., Ján Schlögl, Adam Tomašových, Bernard Lathuilière, and Marián Golej. "Revisiting the Age of Jurassic Coral Bioherms in the Pieniny Klippen Belt (Western Carpathians) on the Basis of Benthic Foraminifers." Geologica Carpathica 70, no. 2 (2019): 113–34. http://dx.doi.org/10.2478/geoca-2019-0007.

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Abstract Coral bioherms of the Vršatec Limestone that formed massive, several tens of meters thick complexes during the Jurassic were important sources of carbonate production, with carbonate sediment exported to deeper parts of the Pieniny Klippen Basin (Western Carpathians). However, the age of these carbonate factories remains controversial. New analyses of benthic foraminiferal assemblages occurring in coral bioherms and peri-biohermal deposits of the Vršatec Limestone at five sites in the western Pieniny Klippen Belt (Vršatec-Castle, Vršatec-Javorníky, Malé Hradište, Malé Hradište-Kalvári

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16

Jaiprakash, B. C., and P. Kumar. "Late Eocene-Early Oligocene Biostratigraphy of Mansa-Indrora Area, Cambay Basin." Journal Geological Society of India 42, no. 4 (1993): 357–67. http://dx.doi.org/10.17491/jgsi/1993/420407.

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Abstract Late Eocene-Early Oligocene succession from two well sections of north-eastern margin of Cambay Basin was analysed for their foraminifera1 content. It has yielded rich larger foraminifera a few planktonic and benthonic foraminifera. Three larger foraminiferal biozones have been recognised for the succession in geologically ascending order. These are Nummulites fabianii Partial Range Zone (? 39.4 m.y. to 37.4 m,y., i.e., ? P 15 to 16); Discocyclina dispansa - Nummulites fabianii Concurrent Range Zone (37.4 m.y. to 36 m.y.. i.e., Zone P 17) and Nummulites fichteli Partial Range Zone (36

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Ying, Rui, Fanny M. Monteiro, Jamie D. Wilson, and Daniela N. Schmidt. "ForamEcoGEnIE 2.0: incorporating symbiosis and spine traits into a trait-based global planktic foraminiferal model." Geoscientific Model Development 16, no. 3 (2023): 813–32. http://dx.doi.org/10.5194/gmd-16-813-2023.

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Abstract. Planktic foraminifera are major marine calcifiers in the modern ocean, regulating the marine inorganic carbon pump, and generating marine fossil archives of past climate change. The foraminifera contain ecogroups with and without spines and algal symbionts, creating functional trait diversity which expands their ecological niches. Here, we incorporate symbiosis and spine traits into the symbiont-barren non-spinose foraminifer functional type in EcoGEnIE to represent all the extant foraminifera species. We calibrated the modelled new traits using Latin hypercube sampling (LHS) and ide

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18

Ayala-López, Adriana, and Adolfo Molina-Cruz. "Micropalaeontology of the hydrothermal region in the Guaymas Basin, Mexico." Journal of Micropalaeontology 13, no. 2 (1994): 133–46. http://dx.doi.org/10.1144/jm.13.2.133.

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Abstract. A micropalaeontological analysis of 40 sedimentary samples from a hydrothermal region in the Guaymas Basin, Gulf of California, Mexico, was carried out to describe microenvironments. These microenvironments were defined through a Q-mode Factor analysis of species abundance data from the benthic foraminiferal biocoenoses and thanatocoenoses. The benthic foraminiferal results were correlated with the biogeographic patterns of diatoms, radiolarians, planktonic foraminifers and ostracods through a ‘graphic-multivariate analysis’. Although the microenvironments have a patchy distribution

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Bhattacharjee, Dola, B. C. Choudhury, K. Sivakumar, et al. "Benthic foraminifera assemblages in turtle congregation sites along the north-east coast of India." Journal of the Marine Biological Association of the United Kingdom 93, no. 4 (2012): 877–87. http://dx.doi.org/10.1017/s0025315412001440.

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Near-shore recent benthic foraminifera from three ecologically important (Olive Ridley turtle congregation sites) but vulnerable sites encompassing 23 sampling stations (12 in Rushikulya, 5 in Devi and 6 in Gahirmatha) along coastal Orissa, north-west Bay of Bengal (BoB) in India were studied for the first time for their composition, distribution and assemblage patterns. Thirty-nine species of benthic foraminifers (from 6 orders and 23 families) were identified of which all 39 were present in Rushikulya, 22 in Devi and 12 in Gahirmatha with abundance ranging from 35–2620 individuals/10 cm3 in

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LeKieffre, Charlotte, Howard J. Spero, Jennifer S. Fehrenbacher, et al. "Ammonium is the preferred source of nitrogen for planktonic foraminifer and their dinoflagellate symbionts." Proceedings of the Royal Society B: Biological Sciences 287, no. 1929 (2020): 20200620. http://dx.doi.org/10.1098/rspb.2020.0620.

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The symbiotic planktonic foraminifera Orbulina universa inhabits open ocean oligotrophic ecosystems where dissolved nutrients are scarce and often limit biological productivity. It has previously been proposed that O. universa meets its nitrogen (N) requirements by preying on zooplankton, and that its symbiotic dinoflagellates recycle metabolic ‘waste ammonium’ for their N pool. However, these conclusions were derived from bulk 15 N-enrichment experiments and model calculations, and our understanding of N assimilation and exchange between the foraminifer host cell and its symbiotic dinoflagell

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Keul, N., G. Langer, L. J. de Nooijer, and J. Bijma. "Effect of ocean acidification on the benthic foraminifera <i>Ammonia</i> sp. is caused by a decrease in carbonate ion concentration." Biogeosciences Discussions 10, no. 1 (2013): 1147–76. http://dx.doi.org/10.5194/bgd-10-1147-2013.

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Abstract. About 30% of the anthropogenically released CO2 is taken up by the oceans, which causes surface ocean pH to decrease and is commonly referred to as Ocean Acidification (OA). Foraminifera are one of the most abundant groups of marine calcifiers, estimated to precipitate ca. 50% of biogenic calcium carbonate in the open oceans. We have compiled the state of the art of OA effects on foraminifera, because the majority of OA research on this group was published within the last 3 yr. Disparate responses of this important group of marine calcifiers to OA were reported, highlighting the impo

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Fang, Peiyue, Bo Xu, Brian T. Huber, Shijia Liu, Youhua Zhu, and Hui Luo. "Late Campanian to early Maastrichtian planktonic foraminiferal assemblages from Cretaceous oceanic red beds (CORBs) in the Yongla section, Gyangze, southern Tibet." Micropaleontology 66, no. 2 (2020): 85–102. http://dx.doi.org/10.47894/mpal.66.2.01.

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Well-preserved and abundant planktonic foraminifera have been recovered from limestones of the Cretaceous oceanic red beds (CORBs) from the Yongla section in Gyangze, southern Tibet. This foraminiferal assemblage is dominated by species of Contusotruncana, Globotruncana, and Globotruncanita. The assemblage contains 21 species belonging to 7 genera and suggests a late Campanian to early Maastrichtian age, which permits amore precise age constraint for CORBs in the Gyangze area. This planktonic assemblage provides an important biostratigraphic datum for the correlations of theCORBs in theHimalay

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Burki, Fabien, Sergey I. Nikolaev, Ignacio Bolivar, Jackie Guiard, and Jan Pawlowski. "Analysis of expressed sequence tags from a naked foraminiferan Reticulomyxa filosa." Genome 49, no. 8 (2006): 882–87. http://dx.doi.org/10.1139/g06-048.

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Foraminifers are a major component of modern marine ecosystems and one of the most important oceanic producers of calcium carbonate. They are a key phylogenetic group among amoeboid protists, but our knowledge of their genome is still mostly limited to a few conserved genes. Here, we report the first study of expressed genes by means of expressed sequence tag (EST) from the freshwater naked foraminiferan Reticulomyxa filosa. Cluster analysis of 1630 valid ESTs enabled the identification of 178 groups of related sequences and 871 singlets. Approximately 50% of the putative unique 1059 ESTs coul

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Ngo, Chi Kim Thi, and Bat Van Dang. "Characterization of foraminifera in the southern East Sea during the late Holocene." Journal of Mining and Earth Sciences 62, no. 6 (2021): 8–13. http://dx.doi.org/10.46326/jmes.2021.62(6).02.

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Twenty marine sediment samples have been collected in the Quaternary sediments in the southwest deep-depression East Sea region to study the foraminifera’s characterization. By analyzing foraminifer components under a microscope and taking photos under SEM, the authors determined that foraminifera fossils in the research area belonged to 01 sub-ordo as per the classification system proposed by Loeblich A.R. and Tappan H., which is Globigerinina Delage and Hérouard, 1896 sub-ordo, including four families, ten genera and 24 species. 04 families are Globigerinidae (06 genera and 13 species), Glob

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Amirhassankhani, Fatemeh, Baba Senowbari-Daryan, and Koorosh Rashidi. "Upper Triassic (Norian-Rhaetian) Foraminifera from the Nayband Formation of the Lut Block (Garm Ab section, Northeast Iran)." Carnets de géologie (Notebooks on geology) 23, no. 4 (2023): 77–95. http://dx.doi.org/10.2110/carnets.2023.2304.

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Studies of Nayband Formation from the Garm Ab section in Lut Block in Central Iran led to the identification of 26 foraminiferal taxa. Nine species are reported from Iran for the first time: Involutina ex gr. liassica (Jones), Involutina sp., Lamelliconus permodiscoides (Oberhauser), Palaeolituonella cf. meridionalis (Luperto), Palaeolituonella cf. angulata Senowbari-Daryan & Cacciatore, Gaudryinella cf. kotlensis Trifonova, Ammobaculites eumorphos Kristan-Tollmann, Frondicularia rhaetica Kristan-Tollmann, Frondicularia cf. xiphoidea Kristan-Tollmann, and Orthotrinacria ? expansa (Zaninett

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Gasiński, M. Adam, Alexandra Olshtynska, and Alfred Uchman. "Late Maastrichtian foraminiferids and diatoms from the Polish Carpathians (Ropianka Formation, Skole Nappe): a case study from the Chmielnik-Grabówka composite section." Acta Geologica Polonica 63, no. 4 (2013): 515–25. http://dx.doi.org/10.2478/agp-2013-0022.

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ABSTRACT Gasiński, M.A., Olshtynska, A. and Uchman, A. 2013. Late Maastrichtian foraminiferids and diatoms from the Polish Carpathians (Ropianka Formation, Skole Nappe): a case study from the Chmielnik-Grabowka composite section. Acta Geologica Polonica, 63(4), 515-525. Warszawa. Well-preserved foraminiferids have been found in the Chmielnik-Grabowka section (Skole Nappe, Polish Carpathians). The Abathomphalus mayaroensis (late Maastrichtian) and Racemiguembelina fructicosa (earlylate Maastrichtian) standard planktonic foraminiferal biozones have been recognized, based on the occurrence of the

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Zehnich, Marc, Robert F. Spielhagen, Henning A. Bauch, et al. "Environmental variability off NE Greenland (western Fram Strait) during the past 10,600 years." Holocene 30, no. 12 (2020): 1752–66. http://dx.doi.org/10.1177/0959683620950393.

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To reconstruct the climatic and paleoceanographic variability offshore Northeast Greenland during the last ~10 ka with multidecadal resolution, sediment core PS93/025 from the outermost North-East Greenland continental shelf (80.5°N) was studied by a variety of micropaleontological, sedimentological and isotopic methods. High foraminiferal fluxes, together with high proportions of ice-rafted debris and high Ca/Fe ratios, indicate a maximum in bioproductivity until ~8 ka related to a low sea-ice coverage. Sortable silt values, planktic foraminifer associations, and stable isotope data of plankt

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Pacho, Laura, Lennart de Nooijer, and Gert-Jan Reichart. "Element ∕ Ca ratios in Nodosariida (Foraminifera) and their potential application for paleoenvironmental reconstructions." Biogeosciences 20, no. 19 (2023): 4043–56. http://dx.doi.org/10.5194/bg-20-4043-2023.

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Abstract. The chemical composition of foraminiferal shells is a well-known tool in paleoceanography to reconstruct past environments and climate. Their application is based on the relation between environmental variables and the concentration of elements incorporated or stable isotope fractionation during calcification. The vast majority of these so-called proxy relationships are based on the foraminiferal order of the Rotaliida, which, for example, encompasses all living planktonic species. However, there are more orders of foraminifera with calcifying members, some of which have fundamentall

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Gonzalez-Regalado, María Luz, Francisco Ruiz-Muñoz, and José Borrego Flores. "Evolución de la distribución de los foraminíferos bentónicos en un medio contaminado: el estuario del río Odiel (Huelva, SO de Espana)." Spanish Journal of Palaeontology 11, no. 1 (2022): 1. http://dx.doi.org/10.7203/sjp.23895.

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El estudio de los foraminiferos bentónicos del estuario del río Odiel (SO Espana) pemite determinar el impacto de algunos factores naturales (hidrodinamica) y antrópicos (contaminación metalica y dragado) en las poblaciones de estos organismos. En el canal principal del estuario alto, la coincidencia de una fuerte hidrodinamica, una textura gruesa de los sedimentos, alta polución y pH ácido ha provocado la desaparición de estos protistas. En el estuario bajo y marino, pueden distinguirse 2 sectores: el canal principal, sin fauna debido a la altísima contaminación y el dragado permanente de la

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Báez R., Pedro D., Cristián D. Riquelme, and Jorge A. Weinborn Del V. "Contenidos gástricos de la langosta de Valparaíso Projasus bahamondei George, 1976 (Crustacea: Decapada: Palinuridae) de los montes submarinos del Cordón Nazca." Boletín Museo Nacional de Historia Natural 54 (December 26, 2005): 71–79. http://dx.doi.org/10.54830/bmnhn.v54.2005.282.

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Se estudió el contenido gástrico de Projasus bahamondei George, 1976, basado en 163 ejemplares (61 machos y 102 hembras), capturados entre 360 y 400 m de profundidad, en los montes submarinos del Cordón Nazca, a 400 millas al oeste del límite Chile-Perú, entre diciembre de 1990 y febrero de 1991. En ellos se identificaron: bacterias (Thioploca sp.), foraminiferos, hidrozoos, crustáceos (lepádidos, copépodos, huevos y otros restos), moluscos gastrópodos, peces teleósteos, material orgánico muy desintegrado y sedimentos. No se detectaron diferencias estadísticamente significativas al comparar lo

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Veklych, Olena. "Some Late Cretaceous agglutinated foraminifers from the Northern outskirts of Donbas, Ukrain." GEO&BIO 2023, no. 25 (2023): 64–74. http://dx.doi.org/10.53452/gb2506.

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The article describes four species of agglutinated foraminifers belonging to three genera (Verneuilina, Orbignyna, and Spiroplectammina) three superfamilies (Verneuilinoidea, Ataxophragmoidea, and Spiroplectamminoidea) and two orders (Ataxophragmiida and Ammodiscida, suborder Textulariina). Benthic species of foraminifers play an important role in the stratigraphic subdivision of the Upper Cretaceous deposits of the Northern outskirts of Donbas and correlation with adjacent territories, as they make up the most part of the assemblage in the samples. For this region, the foraminifera species Ve

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Gooday, Andrew J. "Some recent advances in the study of deep-sea foraminiferal biology and their palaeoecological significance." Paleontological Society Special Publications 6 (1992): 111. http://dx.doi.org/10.1017/s2475262200006717.

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During the past two decades, biologists have become increasingly aware of the diversity and abundance of foraminifera in marine benthic ecosystems. These protists are probably the most important eukaryotes present in ocean floor communities. In some areas, particularly central oceanic regions, foraminiferal assemblages are dominated by newly discovered, soft-bodied forms with morphologies quite unlike those of “conventional” foraminifers and with little fossilisation potential. However, despite the presumed loss of these delicate forms from the fossil record, foraminiferal tests are still the

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Bindiu-Haitonic, Raluca, Ramona Balc, Szabolcs-Attila Kovecsi, Zoltan Csiki-Sava, and Sorin Filipescu. "Early Paleocene foraminifera and calcareous nannoplankton assemblages in deep-sea environments of the northern Eastern Carpathians (Romania)." Micropaleontology 71, no. 2 (2025): 141–66. https://doi.org/10.47894/mpal.71.2.02.

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Deep-water benthic foraminifera and calcareous nannoplankton assemblages are reported from lower Paleocene bathyal turbiditic deposits cropping out along three local transects from the northern Eastern Carpathians (Romania). Paleoenvironmental investigations concerning these deposits have been carried out using both foraminifera (abundances, agglutinated foraminifera morphogroups, clusters, diversity) and calcareous nannoplankton (abundances, clusters, and principal component analysis). The agglutinated foraminifera morphogroups show high proportions of tubular, elongate subcylindrical, and fl

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Reolid, Matías, Jesús Reolid, Dorothea Bunzel, Michael A. Kaminski, and Christian Betzler. "Recent Arborescent Dendrophryid Foraminifera Found On Upper Pleistocene Cold-water Corals from the Inner Sea of the Maldives." Journal of Foraminiferal Research 48, no. 1 (2018): 53–61. http://dx.doi.org/10.2113/gsjfr.48.1.53.

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Abstract Recent specimens of Spiculidendron were found on Late Pleistocene (21,400–22,500 BP) cold-water corals from the sea floor at 457 m depth of the inter-atoll Kardiva Channel of the eastern row of the Maldives archipelago. Spiculidendron and other dendrophryid foraminifera (Rhizammina-like forms) exclusively colonized specimens of the genus Enallopsammia, which was characterized by a phosphatic-stain surface. The Spiculidendron wall was composed of sponge spicules, elongated diatom frustules, tests of juvenile benthic and planktic foraminifera, and calcareous nannoplankton, among other m

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Rakhil, Dev, Neelakandan Ravindran Nisha, Nallusamy Babu, Mayappan Sundararajan, Subbiah Krishnakumar, and Kunjumon Akash. "Foraminiferal Distribution Pattern and its Ecological Implications in the Koswari and Van Islands of the Tuticorin Group of Islands." Indian Journal of Science and Technology 15, no. 32 (2022): 1569–76. https://doi.org/10.17485/IJST/v15i32.609.

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Abstract <strong>Objectives:</strong> The present investigation attempts to map the foraminiferal distribution pattern, its ecological significance, and the elemental composition of the Koswari and Van islands. <strong>Methods:</strong> Foraminiferal distribution patterns (both planktic and benthic) were recorded, and textural and geochemical analyses were carried out in the present study.<strong> Findings:</strong> The coastal environments are generally highly dynamic regions of the earth that possess imprints of global climatic variations. The islands of the Gulf of

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Kozdon, Reinhard. "IN SITU STABLE ISOTOPE MEASUREMENTS IN FORAMINIFERAL TESTS BY SIMS." Journal of Foraminiferal Research 54, no. 4 (2024): 332–41. http://dx.doi.org/10.61551/gsjfr.54.4.332.

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ABSTRACT Fossilized tests of foraminifera are arguably the most important archives of past climate, and many of the longest paleoclimate records have been compiled by the measurement of the oxygen and carbon isotope composition of foraminiferal tests collected from seafloor sediments. Since the analytical methodology was established in the late 1940s, multiple tests are pooled and analyzed, resulting in a single oxygen and carbon isotope value representing their mean composition. These records compiled by multi-test analysis provide, in most scenarios, a faithful picture of the Earth’s past cl

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Glock, Nicolaas. "Benthic foraminifera and gromiids from oxygen-depleted environments – survival strategies, biogeochemistry and trophic interactions." Biogeosciences 20, no. 16 (2023): 3423–47. http://dx.doi.org/10.5194/bg-20-3423-2023.

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Abstract. The oceans are losing oxygen (O2), and oxygen minimum zones are expanding due to climate warming (lower O2 solubility) and eutrophication related to agriculture. This trend is challenging for most marine taxa that are not well adapted to O2 depletion. For other taxa this trend might be advantageous because they can withstand low O2 concentrations or thrive under O2-depleted or even anoxic conditions. Benthic foraminifera are a group of protists that include taxa with adaptations to partly extreme environmental conditions. Several species possess adaptations to O2 depletion that are r

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Trifonova, Ekaterina, and Daria Ivanova. "Foraminiferal assemblages and zonations across the Lower - Middle Triassic boundary in Bulgaria." Geologica Balcanica 31, no. 3-4 (2001): 49–58. http://dx.doi.org/10.52321/geolbalc.31.3-4.49.

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Two types of Triassic sediments could be distinguished on the territory of Bulgaria: Tethyan and Peri-Tethyan. The Tethyan Triassic is allochthonous in its origin. It forms olistolites or rock fragments in breccia-conglomerates within olistostromes in East Stam Planina as well as thrust sheets in Strandzha Mountain. As a rule the Tethyan Triassic rests upon the autochthonous Peri-Tethyan Triassic - coastal shallow - marine sediments of diverse lithology. We summarized the data about foraminiferal contents and foraminifera sequences from Peri-Tethyan Triassic: Northeast Bulgaria (Dobrogea regio

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de Nooijer, L. J., G. Langer, G. Nehrke, and J. Bijma. "Physiological controls on seawater uptake and calcification in the benthic foraminifer <i>Ammonia tepida</i>." Biogeosciences 6, no. 11 (2009): 2669–75. http://dx.doi.org/10.5194/bg-6-2669-2009.

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Abstract. To analyze the relation between seawater uptake and calcification, we incubated juveniles of the benthic foraminifer Ammonia tepida with various fluorescent probes and visualised them afterwards with confocal laser scanning microscopy. Vesicle membranes, Ca ions and vacuole fluids were followed with various tracers and showed for the first time that endocytosis of seawater is part of the calcification process in Ammonia tepida. Data on the intracellular Ca ion cycling allowed for calculating a preliminary cellular Ca budget during foraminiferal calcification. This showed that the fre

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Devre, Rushikesh V., Ashwit S. Shetty, Toni JosephKennady, and Hitesh U. Shingadia. "Diversity of Foraminifera from the Indian Coast." UTTAR PRADESH JOURNAL OF ZOOLOGY 45, no. 15 (2024): 144–53. http://dx.doi.org/10.56557/upjoz/2024/v45i154229.

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Foraminifera, members of the class Granuloreticulosa, are marine protozoans distributed across both pelagic and benthic zones of the ocean. After the death of these microscopic organisms, their shells are washed along the intertidal sandy shores along with sand granules. This organism's shell is called a test which is composed of calcium carbonate, silica, or agglutinated materials that characterize the genera of Foraminifera. In the present study, the sand samples were collected along the different sites of the Indian coastline viz. Juhu Beach (Mumbai), Alibaug Beach (Raigad), Palolem Beach (

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Ozdínová, Silvia, and Ján Soták. "Oligocene-Early Miocene Planktonic Microbiostratigraphy and Paleoenvironments of the South Slovakian Basin (Lučenec Depression)." Geologica Carpathica 65, no. 5 (2015): 451–70. http://dx.doi.org/10.1515/geoca-2015-0005.

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Abstract Oligocene and Lower Miocene sediments of the Lučenec Depression were studied to demonstrate the planktonic bioevents and climatic proxies from the Číž Formation (Rupelian) and Lučenec Formation (Chattian-Aquitanian) on the basis of quantitative analyses of foraminifers and calcareous nannofossils. The oldest nannofossil assemblages of the Číž Formation belonged to the NP23 Zone and were dominated by Reticulofenestra ornata known for preference of temperate eutrophic water conditions. An increase in bioproductivity was documented by abundant large-sized planktonic foraminifers (e.g. Tu

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Pint, Anna, Max Engel, Sandra Melzer, Peter Frenzel, Birgit Plessen, and Helmut Brückner. "How To Discriminate Athalassic and Marginal Marine Microfaunas: Foraminifera and Other Fossils from an Early Holocene Continental Lake in Northern Saudi Arabia." Journal of Foraminiferal Research 47, no. 2 (2017): 175–87. http://dx.doi.org/10.2113/gsjfr.47.2.175.

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Abstract The occurrence of athalassic foraminiferal species, along with the brackish-water ostracod Cyprideis torosa, the barnacle Amphibalanus amphitrite, and brackish-water gastropods, prove the existence of a saline lake at Tayma, northern Saudi Arabia, during the early to mid-Holocene. Outcrops at the former shoreline, as well as a single sediment core, allow a reconstruction of the history of the main lake phase. Whereas these outcrops contain masses of calcareous micro- and macrofossils, the core from the modern sabkha does not. Four foraminiferal species were identified: Ammonia tepida

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Hosseini, Raviz Seyed Mohammad Reza, Massih Afghah, Mahnaz Parvaneh Nejad Shirazi, and of Geology Payame Noor University Tehran Iran. E.-mail: mahnaz402002@yahoo.com Department. "Biostratigraphy of Late Eocene-Oligocene Deposits based on Planktonic and Larger Benthic Foraminifera in the Sabzevaran and Sad Sections, NW Jiroft (Iran)." Revue de Paléobiologie 39, no. 1 (2020): 183–97. https://doi.org/10.5281/zenodo.3936165.

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In this paper, to study biostratigraphy of Paleogene deposits based on foraminifera fauna in NW of Jiroft located in the Central Iran zone, two stratigraphic sections, namely Sabzevaran (354 m) and Sad (132 m) sections were selected. Planktonic foraminifera and large benthic foraminifera were identified in both sections. Faunal assemblages and vertical distribution of identified species support presence of 5 planktonic foraminiferal and 2 large benthic foraminiferal biozones in the Sabzevaran section showing Middle Eocene to Chattian age. In addition, presence of planktonic foraminif

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Bornemann, André, Sofie Jehle, Friederike Lägel, Arne Deprez, Maria Rose Petrizzo, and Robert P. Speijer. "Planktic foraminiferal response to an early Paleocene transient warming event and biostratigraphic implications." International Journal of Earth Sciences 110, no. 2 (2021): 583–94. http://dx.doi.org/10.1007/s00531-020-01972-z.

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AbstractThe Latest Danian Event (LDE, ~ 62.2 Ma) is characterized by global changes in the carbon cycle as indicated by two negative δ13C excursions of up to ~ 1‰. These δ13C shifts are accompanied by a 2–3 °C warming of both surface and deep waters based on benthic and planktic foraminiferal δ18O measurements, and the LDE has, thus, been considered as a so-called hyperthermal event. The event lasted for 200 kyr and has been identified in various ocean basins and shallow marine settings. Here, we present a compilation of data from three deep-sea cores covering the Pacific, North and South Atla

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Ke, Xue, Baohua Li, Zongyan Zhang, et al. "Post-glacial Foraminifera of the incised Yangtze paleo-valley and paleoenvironmental implications." Journal of Paleontology 91, no. 6 (2017): 1102–22. http://dx.doi.org/10.1017/jpa.2017.66.

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AbstractThree gravity cores (LZK1, ZKA4, and CSJA6) from the incised Yangtze paleo-valley comprise a thick sequence of the post-glacial deposit. Nineteen genera (26 species) of the benthic foraminifers are described from these cores, with detailed down-core foraminiferal variations to investigate their paleoenvironmental implications. Three foraminiferal assemblages are recognized for the lower, middle, and upper parts of the cores respectively. The lower part is dominated byAmmonia beccariivar. andFlorilus decoruswith lower abundance and diversity. In the middle part, the foraminifers are abu

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Missiaen, L., L. Wacker, B. C. Lougheed, et al. "Radiocarbon Dating of Small-sized Foraminifer Samples: Insights into Marine sediment Mixing." Radiocarbon 62, no. 2 (2020): 313–33. http://dx.doi.org/10.1017/rdc.2020.13.

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ABSTRACTRadiocarbon (14C) can be used to build absolute chronologies and reconstruct ocean ventilation over the last 40 ka. Sample size requirements have restricted 14C measurements in marine cores with low foraminifer content, impeding 14C-based studies focused on abrupt climate events. Recent developments have demonstrated that small-sized foraminifer samples can now be dated using a gas introduction system at the cost of a small decrease in precision. We explore the potential of gas measurements on benthic and planktonic foraminifers from core SU90-08 (43°03′1″N, 30°02′5″W, 3080 m). Gas mea

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Omana, Lourdes, Ruben Lopez Doncel, Jose Ramon Torres, and Gloria Alencaster. "Biostratigraphy and paleoenvironment of the Cenomanian/Turonian boundary interval based on foraminifera from Valles-San Luis Potosi Platform, Mexico." Micropaleontology 58, no. 6 (2012): 457–85. http://dx.doi.org/10.47894/mpal.58.6.01.

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Lithologic and foraminiferal analysis from the western part of the Valles–San Luis Potosi platform reflect a sea-level rise suggesting that the platform was drowned at the Cenomanian-Turonian boundary interval. Benthic and planktic foraminiferal content of the succession was identified to establish the transition from the shallow-water carbonate sedimentation with abundant larger benthic foraminifera, algae, rudists and other molluscs, corals, echinoderms, worms changing to hemipelagic-pelagic sediments containing calcispheres and opportunistic foraminifers (r-strategists), such as whitenelli

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Langer, Martin R., and Harmeet Bagi. "Tubicolous polychaetes as substrates for epizoic foraminifera." Journal of Micropalaeontology 13, no. 2 (1994): 132. http://dx.doi.org/10.1144/jm.13.2.132.

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Abstract. Associations of epizoic foraminifera and invertebrates are widespread and have been reported from polar to tropical and shallow to bathyal environments (Zumwalt &amp; DeLaca, 1980). Their fossil record stretches far back into Palaeozoic times as documented by agglutinated foraminifera attached to crinoids in Silurian and Devonian reef deposits of Morocco and Gotland (Franzen, 1974). Strong preferences for filter-feeding hosts suggest that epizoic foraminifera benefit from increased nutritional resources accumulated in the immediate flow microhabitat (Langer &amp; Long, 1994).

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Bąk, Krzysztof, and Marta Bąk. "Foraminiferal and radiolarian biostratigraphy of the youngest (Late Albian through Late Cenomanian) sediments of the Tatra massif, Central Western Carpathians." Acta Geologica Polonica 63, no. 2 (2013): 223–38. http://dx.doi.org/10.2478/agp-2013-0009.

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Abstract Bąk, K. and Bąk M. 2013. Foraminiferal and radiolarian biostratigraphy of the youngest (Late Albian through Late Cenomanian) sediments of the Tatra massif, Central Western Carpathians. Acta Geologica Polonica, 63 (2), 223-237. Warszawa. The foraminiferal and radiolarian biostratigraphy of selected sections of the Zabijak Formation, the youngest sediments of the Tatra massif (Central Western Carpathians), have been studied. Benthic foraminifers, mainly agglutinated species, occur abundantly and continuously throughout the studied succession, while planktic foraminifers are generally sp

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Schiebel, R., and A. Movellan. "First-order estimate of the planktic foraminifer biomass in the modern global oceans." Earth System Science Data Discussions 5, no. 1 (2012): 243–80. http://dx.doi.org/10.5194/essdd-5-243-2012.

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Abstract. Planktic foraminifera are heterotrophic mesozooplankton of global marine abundance. The position of planktic foraminifers in the marine food web is different compared to other protozoans and ranges above the base of heterotrophic consumers. Being secondary producers with an omnivorous diet, which ranges from algae to small metazoans, planktic foraminifers are not limited to a single food source, and are assumed to occur at a balanced abundance displaying the overall marine biological productivity at a regional scale. We have calculated the assemblage carbon biomass from data on stand

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