RECENT PUBLICATIONS ON FORAMINIFERA | 2013 (1) | 2012 (6) | 2012 (5) | 2012 (4) | 2012 (3) | 2012 (2) | 2012 (1) | 2011 (5) | 2011 (4) | 2011 (3) | 2011 (2) | 2011 (1) | 2010
BENTHIC FORAMINIFERA IN TEMPERATE CORALS
Foraminiferal and sedimentary analyses were performed on upper Pliocene exposures in the Almería-Níjar basin (SE) to determine its depositional history. The composite stratigraphic section reveals that, during the late Pliocene, a restricted coastal bay with coral banks was being filled with the siliciclastic sediments of prograding fan deltas. In the lower part of the Rambla Quebrada section, fine-grained sediments with Cibicides refulgens, Cibicidoides spp., Asterigerinata spp., Rosalina globularis, Lenticulina calcar, and carinate elphidiids indicate deposition in a distal part of the bay where the marine influence was greatest. Epiphytic species dominate in the lower part of the section and suggest that the distal substrate was densely vegetated. In contrast, the upper part of the section is dominated by taxa characteristic of very shallow brackish environments, notably Ammonia spp. and noncarinate elphidiids. Mud-dwellers inhabiting soft bottoms dominate in the middle-to-upper part of the studied sections. Here, Cancris auriculus, Nonion asterizans, and Cassidulina neocarinata are also locally abundant. These species are usually abundant on substrata with high contents of organic matter, which in this study could be attributed to the increased nutrient flow from the fan deltas prograding into the basin. Higher in the section, varve-like laminae that include species known to be tolerant of disoxia indicate that geomorphic restriction of the bay weakened the mixing of marine and fresh water, which allowed its water column to stratify and develop low-oxygen bottom conditions. (from ABSTRACT)
Pérez-Asensio, J. N., Aguirre, J. (2010). Benthic foraminiferal assemblages in temperate coral-bearing deposits from the late Pliocene. Journal of Foraminiferal Research 40 (1), 61-78.
FORAMINIFERA-BASED TRANSFER FUNCTION
We assessed the performance of a transfer function model for sea-level studies using salt-marsh foraminiferafrom two estuaries of northern Portugal. An independent data set of 12 samples and 13 sub-fossil samples from a core were used to evaluate if reconstructions and errors derived from current models are adequate. ...... Results derived from a reconstruction of sub-fossil samples from a core indicate that high-resolution sea-level reconstructions are possible, but show that depositional environments have to be selected carefully in order to minimize the impact of possible taphonomical loss.
Leorri, E., Fetala, F., Cearreta, A., Moreno, J., Antunes, C., Drago, T., in press. Assessing the performance of a foraminifera-based transfer function to estimate sea-level changes in northern Portugal. Quaternary Research, doi:10.1016/j.yqres.2010.10.003
EVOLUTIONARY CLASSIFICATION OF WHITEINELLIDS
A new genus, Fingeria, is recognized among the globular-chambered trochospiral planktic foraminifera of the Upper Cretaceous (upper Cenomanian–lower Campanian). It consists of two pre-existing species: F. loetterlei (Nauss, 1947) and F. kingi (Trujillo, 1960). The ornamentation consists of scattered pustules, which can often fuse to form rugosities and, occasionally, costellae, especially over the earlier chambers of the test. Meridional ornamentation pattern is occasionally developed over isolated chambers. Fingeria is the only lineage of the whiteinellid stock that exhibits ornamentation coarsening and preferential orientation, which can be meridional or parallel to the periphery.
Georgescu, M. D., 2010. Evolutionary classification of the Upper Cretaceous (Turonian–lower Campanian) planktic foraminifera with incipient meridional ornamentation. Journal of Micropalaeontology 29, 149-161.
HOLOTYPES IN THE TAXONOMY OF FORAMINIFERAL MORPHOSPECIES
The claim that holotypes serve as exemplars of morphology is examined in the context of planktonic foraminiferal taxonomy. A review of some species described over the past 90 years suggests that holotypes are selected subjectively, presumably guided by authors’ conceptions of diagnostic characters. ...... Commonly, type specimens are among the earliest recognized in a taxon and are selected prior to an understanding of its biogeography. Because taxa are distributed in niches within and among water masses in the global ocean, and are quite variable, holotypes are unlikely to be suitable as taxon- wide exemplars. Yet that is their present role. Population variation is under-reported in the literature. Selection of exemplars should be based on species-wide morphometric surveys of populations.
Scott, G. H., in press. Holotypes in the taxonomy of planktonic foraminiferal morphospecies. Marine Micropaleontology, doi: 10.1016/j.marmicro.2010.11.001
LIVE BENTHIC FORAMINIFERA IN A CANYON
Living (Rose Bengal stained) benthic foraminifera were investigated at 18 deep-sea stations sampled in the Whittard Canyon area (NE Atlantic). The stations were positioned along 4 bathymetric transects ranging from 300 to 3000 m depth...... Foraminiferal abundance was positively correlated with diffusive oxygen uptake and phytopigment concentration in the sediment. This suggests a control of organic matter fluxes on the foraminiferal communities. ...... The silty/sandy intercalations at many of the deeper canyon stations may have been rapidly deposited by fairly recent gravity flows. At station 51WB (3002m), the faunal characteristics (strong dominance, shallow infaunal microhabitats) suggest that the foraminiferal community is in an early state of ecosystem colonization after these recent sedimentation events, which would have supplied the important amounts of phytopigments.
Duros, P., Fontanier, C., Metzger, E., Pusceddu, A., Cesbron, F., de Stigter, H. C., Bianchelli, S., Danovaro, R., Jorissen, F.J., in press. Live (stained) benthic foraminifera in the Whittard Canyon, Celtic margin (NE Atlantic). Deep–Sea Research I, doi: 10.1016/j.dsr.2010.11.008
CHLOROPLAST HUSBANDARY AND KLEPTOPLASTIDY IN FORAMINIFERA
...... We identified the foraminiferal kleptochloroplasts using a reference phylogeny made of 87 chloroplastic sequences of known species of diatoms and brown algae. All the analyzed specimens were performing kleptoplastidy and according to our phylogenetic analyses they seem to retain exclusively chloroplasts of diatom origin. There is no apparent specificity for the type of diatom from which chloroplasts originated, however some foraminiferal species seem to accept a wider range of diatoms than others. Possibly the diversity of kleptochloroplasts depends on the type of diatoms the foraminiferans feed on.
Pillet, L., de Vagras, C., Pawlowski, J., in press. Molecular Identification of Sequestered Diatom Chloroplasts and Kleptoplastidy in Foraminifera. Protist, doi: 10.1016/j.protis.2010.10.001
THE FIDELITY OF SHELL-DERIVED δ18Oseawater ESTIMATES
...... We assess the fidelity of shell-derived δ18Oseawater estimates for the surface-dwelling foraminifer Globigerinoides ruber (white) using an Atlantic meridional coretop transect spanning basin-scale temperature and salinity gradients. Shell-derived and observed δ18Oseawater values are well correlated (r2 = 0.77), but a large systematic bias is observed. Shell Mg/Ca ratios are significantly elevated above values expected from observed and isotopic calcification temperatures in the saline subtropical gyres of both hemispheres. This temperature-independent shell Mg/Ca ratio variability, termed “excess Mg/Ca”, is highly correlated with surface salinity (r2 = 0.77), and the observed salinity dependence (27 ± 4%) is much higher than indicated by culture studies (6 ± 2%). ...... these results point to a strongly non-linear, positive salinity effect on shell Mg/Ca ratios that significantly affects the accuracy of SST and δ18Oseawater estimates in high salinity settings (> 35).
Arbuszewski, J., de Menocal, P., Kaplan, A., Farmer, E.C., 2010. On the fidelity of shell-derived δ18Oseawater estimates. Earth and Planetary Science Letters, 300 (3-4), 185-196.
Mg/Ca IN Globorotalia inflata AND Globigerinoides bulloides
Due to its strong gradient in salinity and small temperature gradient the Mediterranean provides an ideal setting to study the impact of salinity on the incorporation of Mg into foraminiferal tests. ......Our results provide new perspectives on reported anomalously high Mg/Ca in sedimentary foraminifera and the applicability of the Mg/Ca paleothermometry in high salinity settings, by showing that (1) part of the signal is generated by precipitation of inorganic calcite on the foraminifer test due to increased calcite saturation state of the water and (2) species with high surface-to-volume shell surfaces are potentially more affected by secondaryMg-rich calcite encrustation.
van Raden, U. J., Groeneveld, J., Raitzsch, M., Kucera, M., in press. Mg/Ca in the planktonic foraminifera Globorotalia inflata and Globigerinoides bulloides from Western Mediterranean plankton tow and core top samples. Marine Micropaleontology, doi: 10.1016/j.marmicro.2010.11.002
Mg/Ca, δ18O AND SALINITY IN Ammonia beccarii
Specimens of the benthic foraminifer Ammonia beccarii were cultured in the laboratory in order to determine the relation between temperature and Mg/Ca and oxygen isotope values in their tests. ......The Mg/Ca ratios in calcite increase exponentially and δ18O decreases linearly with temperature. Salinity has no significant impact on either Mg/Ca or δ18O. We show how the combination of these two parameters can be used to reconstruct seawater δ18O and temperature in shallow marine habitats.
Toyofuku, T., Suzuki, M., Suga, H., Sakai, S., Suzuki, A., Ishikawa, T., de Nooijer, L. J., Schiebel, R., Kawahata, H., Kitazato, H., in press. Mg/Ca and δ18O in the brackish shallow-water benthic foraminifer Ammonia ‘beccarii’. Marine Micropaleontology, doi: 10.1016/j.marmicro.2010.11.003
SANTONIAN-CAMPANIAN BIOSTRATIGRAPHY AND PALAEOENVIRONMENT
Study of an upper Santonian to upper Campanian hemipelagic succession from the southern part of the Romanian Eastern Carpathians enables us to establish an integrated biostratigraphy based on planktonic foraminifera and calcareous nannofossils and to compare this record with the agglutinated foraminiferal biozonation used for the Carpathians. ...... Benthic foraminiferal assemblages were investigated using several methods, such as agglutinated and calcareous benthic foraminiferal morphogroups, and the benthic foraminiferal oxygen index in order to determine their response to environmental parameters in the basin (correlated with sea-level maxima documented by regional sea-level curves for the Tethys). ...... The variations in tubular and deep infaunal morphotypes of agglutinated foraminifera are ascribed to varying levels of organic carbon flux.
Cetean, C. G., Balc, R., Kaminski, M. A., Filipescu, S., in press. Integrated biostratigraphy and palaeoenvironments of an upper Santonian – upper Campanian succession from the southern part of the Eastern Carpathians, Romania. Cretaceous Research, doi: 10.1016/j.cretres.2010.11.001
...... the systematics, evolution and ecological behaviour of the first mineralized Palaeozoic Foraminifera are important to discuss in order to have a clearer picture of former shallow marine environments, and finally understand their distribution through space and time. The systematics of the fossil group of Foraminifera that first developed a mineralized test remains under discussion. These early foraminifers are considered as Textulariata (as generally admitted), recrystallized Fusulinata or an independent group, sometimes called Astrorhizata. In this paper, we argue to assign the early foraminifers to the Fusulinata, and to subdivide this class into six orders: Parathuramminida, Archaediscida and Earlandiida (forming together the subclass Afusulinana n. subcl.), and Tournayellida, Endothyrida and Fusulinida (subclass Fusulinana nom. translat.). These subdivisions are discussed and linked to the first occurrences of the later classes: Miliolata, Nodosariata and Textulariata.
Vachard, D., Pille, L., Gaillot, J., in press. Palaeozoic Foraminifera: Systematics, palaeoecology and responses to global changes. Revue de Micropaléontologie, doi:10.1016/j.revmic.2010.10.001
Foraminifera from the coral-reef lagoons of two atolls are used to investigate the distribution and diversity of assemblages in the central Indian Ocean. Eight assemblages and 270 species of foraminifera are identified. Three assemblages are reefal and dominated by Amphistegina and Calcarina. Only one lagoon assemblage is present in both atolls, which is characterized by abundant Ammonia sp. 1 and smaller miliolid foraminifera. ...... The assemblages compare well with sedimentological characteristics, which is also reflected in their distributions. Species diversity in the Maldives appears to be higher than the western Indian Ocean region due to the stronger influence of central Indo-Pacific faunas. It is not however, as high as the central Indo-Pacific region, which may be due to lower habitat diversity.
Parker, J.H., Gischler, E., in press. Modern foraminiferal distribution and diversity in two atolls from the Maldives, Indian Ocean. Marine Micropaleontology, doi:10.1016/j.marmicro.2010.09.007
CENOZOIC TROPICAL PLANKTONIC FORAMINIFERAL BIOSTRATIGRAPHY
...... In this paper we present an amended low-latitude (tropical and subtropical) Cenozoic planktonic foraminiferal zonation. We compile 187 revised calibrations of planktonic foraminiferal bioevents from multiple sources for the Cenozoic and have incorporated these recalibrations into a revised Cenozoic planktonic foraminiferal biochronology. We review and synthesize these calibrations to both the geomagnetic polarity time scale (GPTS) of the Cenozoic and astronomical time scale (ATS) of the Neogene and late Paleogene. ...... The revised and recalibrated datums provide a major advance in biochronologic resolution and a template for future progress of the Cenozoic time scale.
Wade, B.S., Pearson, P.N., Berggren, W.A., Pälike, H., in press. Review and revision of Cenozoic tropical planktonic foraminiferal biostratigraphy and calibration to the geomagnetic polarity and astronomical time scale. Earth-Science Reviews, doi:10.1016/j.earscirev.2010.09.003
ENVIRONMENTAL CONTROLS ON A RIVER-DOMINATED SHELF
In this paper, we investigate the ecology of live (rose Bengal stained) benthic foraminifera collected at 20 stations ranging from 15 to 100 m depth in the Rhône prodelta (Gulf of Lions, NW Mediterranean). These sites were sampled in September 2006, five months after the Rhône River annual flood. Statistical analyses based on foraminiferal communities (N150 µm) divide our study area into six main biofacies directly related to environmental conditions. ...... We also compare foraminiferal faunas sampled in September 2006 with communities sampled in June 2005, one month after the Rhône River annual flood (Mojtahid et al., 2009). This comparison suggests that opportunistic species (e.g. B. aculeata, Cassidulina carinata, V. bradyana) have responded to organic matter inputs related to marine primary production in June 2005.
Goineau, A., Fontanier, C., Jorisen, F.J., Lansard, B., Buscail, R., Mouret, A., Kerervé, P., Zaragosi, S., Ernoult, E., Artéto, C., Anschutz, P., Metzger, E., Rabouille, C., in press. Live (stained) benthic foraminifera from the Rhône prodelta (Gulf of Lion, NW Mediterranean): Environmental controls on a river-dominated shelf. Journal of Sea Research, doi:10.1016/j.seares.2010.07.007
THE RATE OF 20TH CENTURY SEA LEVEL RISE
We collected a set of surface samples from two salt marshes in the Morbihan Golfe, France to determine foraminiferal distribution patterns ...... developed a foraminifera-based transfer function using a modern training set of 36 samples and 23 species. ...... The agreement between the foraminifera-based sea level curve and the Brest tide-gauge record confirms the reliability of transfer function estimates and the validity of this methodology to extend sea level reconstructions back into the pre-instrumental period. Both instrumental and microfossil records suggest an acceleration of sea level rise during the 20th century.
Rossi, V., Horton, B.P., Corbett, D.R., Leorri, E., Perez-Belmonte, L., Douglas, B.C., in press. The application of foraminifera to reconstruct the rate of 20th century sea level rise, Morbihan Golfe, Brittany France. Quaternary Research, doi:10.1016/j.yqres.2010.07.017
WHAT HAPPENS WHEN THE OCEAN IS OVERHEATED?
The global warming and major perturbation of the global carbon cycle that occurred during the Paleocene–Eocene Thermal Maximum (PETM) have been investigated in the lower bathyal–upper abyssal Alamedilla section (Spain). Geochemical anomalies and dramatic faunal changes (including the globally recognized extinction event of deep-sea benthic foraminifera and the rapid evolutionary turnover of planktic foraminifera and calcareous nannofossils) are associated with the PETM at Alamedilla....Significant changes in foraminiferal test size are documented across the PETM.
Alegret, L., Ortiz, S., Arenillas, I., Molina, E., 2010. What happens when the ocean is overheated? The foraminiferal response across the Paleocene–Eocene Thermal Maximum at the Alamedilla section (Spain). Geological Society of America Bulletin, Vol. 122 (9/10), 1616-1624.
TIMOR TRIASSIC AGGLUTINATED FORAMINIFERA
Forty-nine species of organic-cemented siliceous agglutinated foraminifera are described from 11 different facies associations representing basinal deposits of the Triassic in Timor Leste. The facies associations containing the foraminifera range from those influenced by sediment derived from nearby carbonate banks to prodelta and delta-front associations. A survey of equivalent faunas from selected shallow-marine basins ranging from the Carboniferous to the mid-Cretaceous illustrates the conservative development through time of the siliceous agglutinated foraminifera.
Haig, D.W. and McCartain, E., 2010. TRIASSIC ORGANIC-CEMENTED SILICEOUS AGGLUTINATED FORAMINIFERA FROM TIMOR LESTE: CONSERVATIVE DEVELOPMENT IN SHALLOW-MARINE ENVIRONMENTS. Journal of Foraminiferal Research, Vol. 40 (4), 366-392.
LIVE FAUNAS ALONG A BATHYMETRICAL TRANSECT
In a 10-stations bathymetrical transect in the Bay of Biscay, we observed important changes in the density, composition and microhabitats of live foraminiferal faunas from the outer continental shelf to the abyssal plain.....The foraminiferal data together with the pore water data in the sediment give evidence of the presence of a trophic gradient from very eutrophic settings at the upper continental shelf towards oligotrophic settings at the abyssal area.
Mojtahid, M., Griveaud, C., Fontanier, C., Anschutz, P., Jorissen, F.J., 2010. Live benthic foraminiferal faunas along a bathymetrical transect (140–4800 m) in the Bay of Biscay (NE Atlantic). Revue de micropaléontologie,
Vol. 53, Issue 3, 139-162.
FORAMINIFERAL RESPONSES TO ABSENCE OF FRESH PHYTODETRITUS
The study illustrates that the quality of organic material has an important impact on the composition and maintenance of some benthic foraminiferal communities, that the faunal response to reduction, or even a halt, in the supply of fresh phytodetritus, is not necessarily immediate or dramatic, and that the response depends on the trophic conditions prevailing in the area when the halt occurs.
Alve, E., 2010. Benthic foraminiferal responses to absence of fresh phytodetritus: A two-year experiment. Marine Micropaleontology, Vol. 76 (3-4), 67-75.
ONTOGENETIC EFFECTS ON δ¹³C and δ18O
We determined the stable oxygen and carbon isotopic composition of live (Rose Bengal stained) tests belonging to different size classes of two benthic foraminiferal species from the Pakistan continental margin. Our data underline the necessity to base longer δ18O and δ13C isotope records derived from benthic foraminifera on size windows of 100 μm or less. This is already common practice in down-core isotopic studies of planktonic foraminifera.
Schumacher, S., Jorissen, F.J., Mackensen, A., Gooday, A.J., Pays, O., 2010. Ontogenetic effects on stable carbon and oxygen isotopes in tests of live (Rose Bengal stained) benthic foraminifera from the Pakistan continental margin. Marine Micropaleontology, Vol. 76 (3-4), 92-103.
PHANEROZOIC DIVERSITY OF AGGLUTINATED FORAMINIFERA
New diversity curves for agglutinated foraminiferal genera are presented based on the stratigraphic ranges of 764 genera distributed over the 91 Phanerozoic chronostratigraphic subdivisions given in the ICS timescale.
Kaminski, M.A., Setoyama, E., Cetean, C.G., 2010. The Phanerozoic diversity of agglutinated foraminifera: Origination and extinction rates. Acta Palaeontologica Polonica, Vol. 55, Issue 3, 529-539.
Environmental SSU rDNA-based surveys show that Foraminifera are a widespread and diverse component of soil microbial communities. Phylogenetic analysis clusters them in four groups branching among the radiation of early foraminiferal lineages. Identification of terrestrial foraminiferal species and understanding of their ecological role represent an exciting challenge for future research.
Lejzerowicz, F., Pawlowski, J., Fraissinet-Tachet, L., Marmeisse, R., 2010. Molecular evidence for widespread occurrence of Foraminifera in soils. Environmental Microbiology,
Vol. 12, Issue 9.
JURASSIC VENT FORAMINIFERA
Recurvoides infernus sp. nov., one of the oldest representatives of the superfamily Recurvoidacea (Foraminifera), is described from a black claystone overlying the manganese deposits in the Western Tatra Mountains (Poland). These manganese carbonates/silicates were laid down around a shallow−water exhalative submarine hydrothermal vent that was active in the early Toarcian. The microfossils are possibly the first described Jurassic foraminifera associated with hydrothermal vents (from ABSTRACT).
Tyszka, J., Jach, R., and Bubík, M. 2010. A new vent−related foraminifer from the lower Toarcian black claystone of the Tatra Mountains, Poland. Acta Palaeontologica Polonica 55 (2): 333–342 PDF
DECADAL-SCALE CHANGES IN ABYSSAL FORAMINIFERAL ASSEMBLAGES
Trends in the abundance, diversity and taxonomic composition of ‘live’ (rose Bengal stained) foraminiferal assemblages (0-1 cm layer, >63-µm fraction) were analysed in replicate multiple corer samples collected at the Porcupine Abyssal Plain (48˚ 50’ N, 16˚ 30’ W, 4850 m water depth) over a 13-yr period (1989-2002). Overall, the abyssal time-series revealed decadal-scale changes among shallow-infaunal foraminifera, more or less coincident with changes in the megafauna, as well as indications of shorter-term events related to seasonally-pulsed phytodetrital inputs.
Gooday, A.J., Malzone, M.G., Bett, B.J., Lamont, P.A., 2010. Decadal-scale changes in shallow-infaunal foraminiferal assemblages at the Porcupine Abyssal Plain, NE Atlantic. Deep-Sea Research II 57, 1362-1382.
DAN-C2 HYPERTHERMAL EVENT AT GUBBIO
The Dan-C2 event is an early Danian, transient (∼100 kyr) hyperthermal episode centered at ∼65.2 Ma, which records shifts in carbon reservoirs and ocean warming in the northwestern and southeastern sectors of the Atlantic Ocean. Here we present and discuss high-resolution biochronostratigraphic and magnetic susceptibility data and geochemical records from the western Tethyan Contessa Highway section (Gubbio, Italy), which provide the first direct evidence of the Dan-C2 event beyond the Atlantic Ocean and point to the supra-regional, possibly global, significance thereof.
Coccioni, R., Frontalini, F., Bancala, G., Fornaciari, E., Jovane, L., Sprovieri, M., 2010. The Dan-C2 hyperthermal event at Gubbio (Italy): Global implications, environmental effects, and cause(s). Earth and Planetary Science Letters 297 (1-2): 298-305.
ECOLOGICAL AND EVOLUTIONARY RESPONSE TO MECO
The enigmatic middle Eocene climatic optimum (MECO) is a transient (∼500kyr) warming event that significantly interrupted at ∼40 Ma the long-term cooling through the middle and late Eocene, eventually resulting in establishment of permanent Antarctic ice-sheet. ...... Here we present a detailed planktonic foraminiferal analysis of the MECO interval from a marginal basin of the central-western Tethys (Alano section, northeastern Italy). ...... High-resolution quantitative analysis performed on both >38 μm and >63 μm fractions reveals pronounced and complex changes in planktonic foraminiferal assemblages indicating a strong environmental perturbation that parallels the variations of the stable isotope curves corresponding to the MECO and post-MECO intervals.
Luciano, V., Giusberti, L., Agnini, C., Fornaciari, E., Rio, D., Spofforth, D.J.A., Pälike, H., 2010. Ecological and evolutionary response of Tethyan planktonic foraminifera to the middle Eocene climatic optimum (MECO) from the Alano section (NE Italy). Palaeogeography, Palaeoclimatology, Palaeoecology 292 (1-2): 82-95.
We review the geochemical proxies that utilize foraminiferal carbonate tests, including potential uses of the proxies for reconstructions through time: 18O, 13C, trace elements (Mg, Cd, Ba, Zn, B, U), 87Sr/86Sr, 26Mg, 11B, and Nd. Both planktic and benthic foraminifera are included.
Katz, M.E., Cramer, B.S., Franzese, A., Hönisch, B., Miller, K.G., Rosenthal, Y., Wright, J.D., 2010. Traditional and emerging geochemical proxies in foraminifera. Journal of Foraminiferal Research 40 (2): 165–192.
NITRATE STORAGE AND DENITRIFICATION
...... Here we show that several different and diverse foraminiferal groups (miliolids, rotaliids, textulariids) and Gromia, another taxon also belonging to Rhizaria, accumulate and respire nitrates through denitrification. The widespread occurrence among distantly related organisms suggests an ancient origin of the trait. The diverse metabolic capacity of these organisms, which enables them to respire with oxygen and nitrate and to sustain respiratory activity even when electron acceptors are absent from the environment, may be one of the reasons for their successful colonization of diverse marine sediment environments.
Piña-Ochoa, E., Høgslund, S., Geslin, E., Cedhagen, T., Revsbech, N.P., Nielsen, L.P., Schweizer, M., Jorissen, F., Rysgaard, S., Risgaard-Petersen, N., 2010. Widespread occurrence of nitrate storage and denitrification among Foraminifera and Gromiida. PNAS 107 (3), 1148-1153.
SURVIVAL OF BENTHIC FORAMINIFERAL PROPAGULES
New data support our previously published propagule dispersal hypothesis and show that propagules of some benthic foraminiferal species can survive for two years before growth commences. Our results indicate substantial inter-specific differences in dispersal potential and support previous suggestions that among free-living species, some serial forms have the potential for long-distance dispersal.
Alve, E., Goldstein, S.T., 2010. Dispersal, survival and delayed growth of benthic foraminiferal propagules. Journal of Sea Research 63 (1): 36-51.
RECENT PUBLICATIONS ON FORAMINIFERA | 2013 (1) | 2012 (6) | 2012 (5) | 2012 (4) | 2012 (3) | 2012 (2) | 2012 (1) | 2011 (5) | 2011 (4) | 2011 (3) | 2011 (2) | 2011 (1) | 2010