Difference between revisions of "RECENT PUBLICATIONS ON FORAMINIFERA 2012 (3)"
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'''[[RECENT PUBLICATIONS ON FORAMINIFERA|RECENT PUBLICATIONS ON FORAMINIFERA]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2012 (2)|2012 (2)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2012 (1)|2012 (1)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2011 (5)|2011 (5)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2011 (4)|2011 (4)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2011 (3)|2011 (3)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2011 (2)|2011 (2)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2011 (1)|2011 (1)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2010|2010]]'''<font size="2"> | '''[[RECENT PUBLICATIONS ON FORAMINIFERA|RECENT PUBLICATIONS ON FORAMINIFERA]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2012 (2)|2012 (2)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2012 (1)|2012 (1)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2011 (5)|2011 (5)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2011 (4)|2011 (4)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2011 (3)|2011 (3)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2011 (2)|2011 (2)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2011 (1)|2011 (1)]] | [[RECENT PUBLICATIONS ON FORAMINIFERA 2010|2010]]'''<font size="2"> | ||
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| + | ==Sr ISOTOPE FRACTION OF PLANKTIC FORAMINIFERA AND INORGANIC CALCITE== | ||
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| + | We have investigated the strontium isotope fractionation (Δ<sup>88/86</sup>Sr<sub>carb-aq</sub>) between inorganic calcite and aqueous Sr<sup>2+</sup> ions by precipitation experiments at a constant temperature of 25°C and precipitation rates (R) ranging from 10<sup>2.3</sup> to 10<sup>4.2</sup> μmol/m<sup>2</sup>/h. Strontium isotope ratios were measured using the <sup>87</sup>Sr-<sup>84</sup>Sr double spike technique. It was found that strontium isotope fractionation in these calcites is strongly dependent on the precipitation rate: ...... The strontium isotopes of both foraminifera species are strongly fractionated (Δ<sup>88/86</sup>Sr<sub>carb-aq</sub> = -0.248 ± 0.005‰) when compared to published data of other major marine calcifiers. Applying the results from the inorganic precipitation experiments we find that the strong foraminiferal strontium isotope fractionation can be explained by calcification in a largely open system at high precipitation rates, comparable in magnitude to rates known from scleractinian reef corals. This interpretation is in good agreement with the kinetic calcification model for planktic foraminifera by Kisakürek et al. (''GCA'' '''75''' (2011), 427), which was based on calcium isotopes and elemental Sr/Ca ratios. | ||
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| + | <font size="2">([http://www.sciencedirect.com/science/article/pii/S0016703712002438?v=s5 ABSTRACT]) | ||
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| + | ----Böhm, F., Eisenhauer, A., Tang, J., Dietzel, M., Krabbenhöft, A., Kisakürek, B., Horn, C., in press. [http://www.sciencedirect.com/science/article/pii/S0016703712002438?v=s5 Strontium isotope fractionation of planktic foraminifera and inorganic calcite].Geochimica et Cosmochimica Acta, doi:10.1016/j.gca.2012.04.038 | ||
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| + | ==PREFERENCE FOR SPECIFIC SEDIMENT FRACTIONS AND POLLUTION TOLERANCE OF BENTHIC FORAMINIFERA== | ||
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| + | [[Image:Marine_Geology_Cover.gif|left|80px| ]]<font size="2"> | ||
| + | The coastal zone is the most variable area in the marine system in terms of environmental parameters and it is characterized by the highest granulometric variability. Considering that the distribution of benthic foraminifera is controlled by several biotic and abiotic factors, including sediment texture, this may be considered one of the main factors influencing foraminiferal assemblage composition. The role of sediment grain size on foraminiferal species distribution has been recognised by several studies, but only in a few cases it has been considered from a quantitative viewpoint. On this rationale, 137 sediment samples collected in three different Italian National Relevance Sites (Bagnoli, Baia and Augusta), affected by different type and degree of pollution, were analysed for grain size and benthic foraminifera. ...... <br/> | ||
| + | '''Highlights''' | ||
| + | ► We studied the preference of foraminiferal species for selected sediment fractions. ► A general preference of some species for specific sediment fractions was recognized. ► Sediment controls species distribution both in moderately and heavily polluted sites. ► Groups of species with different trophic needs showed preference for sand or mud. ► Species selecting fine sediment may be pollution tolerant due to adaptive strategy. | ||
| + | <font size="2">([http://www.sciencedirect.com/science/article/pii/S0025322712000837?v=s5 ABSTRACT]) | ||
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| + | ----Magno, M.C., Bergamin, L., Finoia, M.G., Pierfranceschi, G., Venti, F., Romano, E., in press. [http://www.sciencedirect.com/science/article/pii/S0025322712000837?v=s5 Correlation between textural characteristics of marine sediments and benthic foraminifera in highly anthropogenically-altered coastal areas]. Marine Geology, doi: 10.1016/j.margeo.2012.04.002 | ||
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| + | ==PALAEOENVIRONMETAL EVOLUTION OF THE EAST CARPATHIAN FOREDEEP DURING THE LATE MIOCENE-EARLY PLIOCENE== | ||
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| + | The thick and continuous Mio-Pliocene sedimentary successions of the Focşani Depression in the Dacian Basin of Romania provide an excellent opportunity to study the palaeoecological changes in the Eastern Paratethys during the time when the Mediterranean and Black Sea experienced major sea level fluctuations related to the closure and re-opening of the marine connection to the Atlantic Ocean during the Messinian Salinity Crisis. These successions form the basis of high-resolution magneto-biostratigraphic studies that allow a detailed correlation to the standard Geological Time Scale. Here, we analyse the palaeoenvironmental evolution of the East Carpathian foredeep by integrating micro- and macropalaeontological data and sedimentological analyses. ...... | ||
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| + | <font size="2">([http://www.sciencedirect.com/science/article/pii/S0921818112000604?v=s5 ABSTRACT]) | ||
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| + | ----Stoica, M., Lazar, I., Krijgsman, W., Vasiliev, I., Jipa, D., Floroiu, A., in press. [http://www.sciencedirect.com/science/article/pii/S0921818112000604?v=s5 Palaeoenvironmental evolution of the East Carpathian foredeep during the late Miocene – early Pliocene (Dacian Basin; Romania)]. Global and Planetary Change, doi:10.1016/j.gloplacha.2012.04.004 | ||
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| + | ==LATE QUATERNARY BIOSTRATIGRAPHY AND PALEOENVIRONMENTS IN THE BRAZILIAN BASIN== | ||
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| + | The foraminiferal (planktonic and benthic) and nannofosssil assemblages have been analyzed in the sediments of Core ACB-17-1447 taken from the South America continental slope north of the Rio Grande Rise piedmont during Cruise 17 of the R/V Akademik Sergey Vavilov. ...... The Quaternary age of the host sediments is evident from the occurrence of the planktonic foraminiferal index species ''Globorotalia truncatulinoides''. Based on the nannofossil assemblages, the core sediments are attributed to the upper Pleistocene-Holocene. ...... The paleotemperature analysis of the planktonic foraminifers provided data for constructing the temperature curve that demonstrates two warm peaks. ...... Based on the abundances, taxonomic diversity, and proportions of the characteristic species of benthic foraminifers, the Core ASV-17-1447 section is divided into six intervals correlated with the marine isotopic stages defined by both the planktonic foraminifers and climatic changes evident from the variations in the bottom water circulation along the southwestern slope of the Brazilian Basin during the Late Quaternary. | ||
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| + | <font size="2">([http://www.springerlink.com/content/w247443204816204/ ABSTRACT]) | ||
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| + | ----Dmitrenko, O.B., Lukashina, N.P., Os'kina, N.S., 2012. [http://www.springerlink.com/content/w247443204816204/ Upper quaternary biostratigraphy and formation environments of the southwestern Atlantic Core ACB-17-1447 inferred from micropaleontological data]. Oceanology 52 (2), 249-260. | ||
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| + | == INDIVIDUAL TO COMMUNITY-LEVEL FAUNAL RESPONSES TO EARLY MIOCENE GLOBAL WARMING == | ||
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| + | [[Image:PLoS_ONE.jpg|left|80px| ]]<font size="2"> | ||
| + | Modern climate change has a strong potential to shift earth systems and biological communities into novel states that have no present-day analog, leaving ecologists with no observational basis to predict the likely biotic effects. Fossil records contain long time-series of past environmental changes outside the range of modern observation, which are vital for predicting future ecological responses, and are capable of (a) providing detailed information on rates of ecological change, (b) illuminating the environmental drivers of those changes, and (c) recording the effects of environmental change on individual physiological rates. Outcrops of Early Miocene Newport Member of the Astoria Formation (Oregon) provide one such time series. This record of benthic foraminiferal and molluscan community change from continental shelf depths spans a past interval environmental change (~20.3-16.7 mya) during which the region warmed 2.1–4.5°C, surface productivity and benthic organic carbon flux increased, and benthic oxygenation decreased, perhaps driven by intensified upwelling as on the modern Oregon coast. ...... | ||
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| + | <font size="2">([http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0036290 ABSTRACT]) | ||
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| + | ----Belanger, C.L. S., 2012. [http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0036290 Individual to Community-Level Faunal Responses to Environmental Change from a Marine Fossil Record of Early Miocene Global Warming]. PLoS ONE 7 (4): e36290. doi:10.1371/journal.pone.0036290 | ||
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| + | == ISOTOPIC COMPOSITION OF LANGHIAN FORAMINIFERAL TESTS IN A MARGINAL PART OF THE CARPATHIAN FOREDEEP == | ||
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| + | [[Image:GeologicaCarpathica_front.jpg|left|80px| ]]<font size="2"> | ||
| + | Foraminiferal assemblages from three locations of the Moravian part of the Carpathian Foredeep (Kralice, Premyslovice, Zidlochovice) have been studied in order to determine the paleoenvironmental conditions during the Early Badenian (Middle Miocene). Paleobiological characteristics (plankton/benthos-ratio, relative abundances of warm-water plankton species, five-chambered ''Globoturborotalita'' spp., ''Coccolithus pelagicus'' and high nutrient markers [benthos], test sizes and ranges of ''Globigerina'' sp. and cibicidoids, Benthic Foraminiferal Oxygen Index) were determined along with stable C and O isotope compositions. ...... Several types of near-shore paleoenvironment were distinguished using the theoretical models: (i) bay influenced by seasonal phytodetritus supply from the continent (Kralice); (ii) dynamic shore characterized by variable isotopic compositions probably due to mixing of indigenous, transported and reworked tests (Premyslovice); (iii) shore of alternating normal marine and continentally influenced environments (Zidlochovice). | ||
| + | <font size="2">([http://www.geologicacarpathica.sk/src/main.php ABSTRACT]) | ||
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| + | ----Holcova, K., Demeny, A., 2012. [http://www.geologicacarpathica.sk/src/main.php The oxygen and carbon isotopic composition of Langhian foraminiferal tests as a paleoecological proxy in a marginal part of the Carpathian Foredeep (Czech Republic)]. Geologica Carpathica 63 (2), 121-137. | ||
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| + | ==A REAPPRAISAL OF THE VITAL EFFECT IN BENTHIC FORAMINIFERA ON Mg/Ca RATIOS== | ||
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| + | [[Image:Biogeosciences_front.jpg|left|80px| ]]<font size="2"> | ||
| + | ...... The diversity in foraminiferal Mg/Ca-temperature calibrations suggests that there is also a biological control on this proxy. This study presents a new Mg/Ca-temperature calibration for the benthic foraminifer ''Bulimina marginata'', based on cultures under a range of temperatures (4–14 ° C). ...... The inter-individual variability is quantified and split in three components, namely (1) an analytical error; (2) an environmental effect and (3) a vital effect. The effect of inter-individual variability on the accuracy of Mg/Ca-temperature calibrations is depending on the sensitivity of the used calibration and the number of individuals measured (Temperature uncertainty = (0.33 · N<sup>−0.50</sup>)/sensitivity). The less sensitive a calibration, the greater is the impact of inter-individual variability. This can partly be circumvented by measuring more individuals. Differences in sensitivity may depend on the stability of the environment in which the foraminifera live and the concurring ecological strategy. This study shows the link between inter-individual variability en sensitivity and their influence on the accuracy of \Mg/Ca-temperature calibrations. | ||
| + | <font size="2">([http://www.biogeosciences-discuss.net/9/4947/2012/ ABSTRACT]) | ||
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| + | ----Wit, J.C., de Nooijer, L.J., Barras, C., Jorissen, F., Reichart, G.J., 2012. [http://www.biogeosciences-discuss.net/9/4947/2012/ A reappraisal of the vital effect in benthic foraminifera on Mg/Ca ratios: species specific uncertainty relationships]. Biogeosciences Discuss 9, 4947-4977. | ||
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| + | ==ORIGIN OF DEEP WATER IN THE JAPAN SEA OVER THE LAST 145kyr== | ||
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| + | [[Image:PPP_front.gif|left|80px| ]]<font size="2"> | ||
| + | We examined the paleoceanographic origin of the deep water in the Japan Sea over the last 145 kyr by using stable isotope data from foraminifera and paleontological data related to diatoms and planktonic foraminiferal coiling direction from core KT05-9p2 recovered from the Yamato Rise in the center of the Japan Sea. ......<br/> | ||
| + | '''Highlights''' | ||
| + | ► We examined the paleoceanographic origin of the Japan Sea for the last 145 ka. ► The Tsushima and Oyashio currents have been the major source of water in the Japan Sea. ► The glacio-eustatsy has greatly influenced the oceanic regime of the Japan Sea. ► Seasonal cooling of surface water produced deep water at high sea-level stands. Baroclinic forcing induced the inflow of the Oyashio Current at low sea-level stands. | ||
| + | <font size="2">([http://www.sciencedirect.com/science/article/pii/S0031018212002064 ABSTRACT]) | ||
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| + | ----Minoura, K., Akai, K., Nemoto, N., Tsukawaki, S., Nakamura, T., in press. [http://www.sciencedirect.com/science/article/pii/S0031018212002064 Origin of deep water in the Japan Sea over the last 145kyr]. Palaeogeography, Palaeoclimatology, Palaeoecology, doi:10.1016/j.palaeo.2012.04.011 | ||
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| + | ==THE BEDOULIAN (LOWER APTIAN) STRATOTYPE AT ROQUEFORT-LA BÉDOULE, SE FRANCE== | ||
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| + | [[Image:CretaceousResearch_front.gif|left|80px| ]]<font size="2"> | ||
| + | New drill cores from the Lower Aptian historical stratotype at Roquefort-La Bédoule (SE France) provide continuous high-resolution geochemical and isotope records which closely track the onset of OAE 1a in a subtropical intra-shelf basin (South Provençal Basin). The drilling operation recovered a total of 180 m of undisturbed sediments in three holes. The lowermost 67 m correspond to the Bedoulian (core LB1) and are here analyzed in high-resolution using geochemical proxies (stable carbon isotopes, stable oxygen isotopes, and carbonate content) and foraminiferal biostratigraphy. Pervasive bioturbation through core LB1 suggests mostly oxygenated bottom water conditions with transient dysoxic episodes, as shown by higher pyrite and glauconite concentrations within the marlstones. Unprecedented resolution over the negative δ<sup>13</sup>C excursion preceding OAE 1a (segment C3) reveals a characteristic double trough extending over ∼5.5 m in core LB1. This long-lasting negative excursion was possibly linked to multiple pulses of enhanced CO2 release to the atmosphere. Estimated sedimentation rates of 1.6–2 cm/kyr indicate that the negative δ<sup>13</sup>C excursion lasted >200 kyr, while the main positive carbon isotope shift (segment C4) had a duration of >300 kyr. Fluctuations in δ<sup>18</sup>O suggest transient episodes of climate warming and cooling at the northern margin of the Tethys or even on a more global scale prior to the onset of OAE 1a. | ||
| + | <font size="2">([http://www.sciencedirect.com/science/article/pii/S0195667112000584 ABSTRACT]) | ||
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| + | ---- Lorenzen, J., Kuhnt, W., Holbourn, A., Flögel, S., Moullade, M., Tronchetti, G., in press. [http://www.sciencedirect.com/science/article/pii/S0195667112000584 A new sediment core from the Bedoulian (Lower Aptian) stratotype at Roquefort-La Bédoule, SE France]. Cretaceous Research, doi:10.1016/j.cretres.2012.03.019 | ||
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| + | ==CAMPANIAN-MAASTRICHTIAN BIOSTRATIGRAPHY AND MAGNETOSTRATIGRAPHY AT ZUMAIA, SPAIN== | ||
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| + | [[Image:CretaceousResearch_front.gif|left|80px| ]]<font size="2"> | ||
| + | ...... We present a new, high-resolution calibration of planktonic foraminiferal and calcareous nannofossil biostratigraphic datums, alongside new magnetostratigraphy. Six planktonic foraminiferal zones (Rugoglobigerina rotundata to Pseudoguembelina hariaensis) and nine nannofossil (sub)zones (UC15e<sup>TP</sup>? to UC20d<sup>TP</sup>) have been identified, encompassing the uppermost Campanian through uppermost Maastrichtian. ...... Differences between the planktonic foraminiferal and nannofossil datums at Zumaia and those from the Tercis boundary stratotype section (France) suggest that the biostratigraphic criteria used to identify the C/M boundary are problematic. We propose, therefore, two alternative, key biostratigraphic datums with which to determine the stratigraphic position of this boundary: the stratigraphic base occurrence datum (BO) of the planktonic foraminifer ''Pseudoguembelina palpebra'' and the top occurrence datum (TO) of the nannofossil ''Broinsonia parca'' subsp. ''constricta''. The C31r/C31n magnetic polarity reversal, and the BOs of the planktonic foraminifer ''Racemiguembelina fructicosa'' and the nannofossil ''Lithraphidites quadratus'' are events that may prove useful in formally defining the lower/upper Maastrichtian boundary. | ||
| + | <font size="2">([http://www.sciencedirect.com/science/article/pii/S019566711200050X ABSTRACT]) | ||
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| + | ---- Pérez-Rodrígeuz, I., Lees, J.A., Carrasoaña, J.C., Arz, J.A., Arenillas, I., in press. [http://www.sciencedirect.com/science/article/pii/S019566711200050X Planktonic foraminiferal and calcareous nannofossil biostratigraphy and magnetostratigraphy of the uppermost Campanian and Maastrichtian at Zumaia, northern Spain]. Cretaceous Research, doi:10.1016/j.cretres.2012.03.011 | ||
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==THE CONTRIBUTION OF NATURAL VARIABILITY TO THE MODERN DECREASE IN FORAMINIFERAL δ<sup>18</sup>O== | ==THE CONTRIBUTION OF NATURAL VARIABILITY TO THE MODERN DECREASE IN FORAMINIFERAL δ<sup>18</sup>O== | ||
