MODERN WARM-TEMPERATE AND SUBTROPICAL SHALLOW-WATER BENTHIC FORAMINIFERA OF THE SOUTHERN GULF OF CALIFORNIA, MEXICO

2003 ◽  
Vol 33 (4) ◽  
pp. 309-329 ◽  
Author(s):  
J. Halfar
Keyword(s):  
Shallow Water ◽  
Benthic Foraminifera ◽  
Gulf Of California ◽  
Warm Temperate

scholarly journals Upper Barremian-Lower Aptian Urgonian limestone's in the Rakova bara section (Carpatho-balkanides, NE Serbia): Analysis and comparison with adjacent areas

2010 ◽  
Vol 90 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Ivana Carevic ◽  
Darivojka Ljubovic-Obradovic ◽  
Monika Bozinovic ◽  
Velimir Jovanovic
Keyword(s):  
Shallow Water ◽  
Benthic Foraminifera ◽  
Carbonate Sedimentation ◽  
Lower Aptian ◽  
First Time ◽  
Water Carbonate ◽  
Shallow Water Carbonate

The Upper Barremian-Lower Aptian succession is recorded from a limestone sequence that crops out in the surrounding of Rakova Bara in the Carpatho-Balkanides range in northeastern Serbia. The micropalaeontological and sedimentological studies lead to recognition of the two types of microfacies. The benthic foraminiferal association consists of Vercorsella laurentii, Rumanoloculina robusta, Praechrysalidina infracretaceae, Dictyoconus gr. arabicus, Debarina hahounerensis, Charentia cuvilieri and Pseudocyclammina lituus that confirm the stratigraphical and palaeoenvironmental connection of the microfossil assemblages with the classical Urgonian-type, shallow-water carbonate sedimentation. The association documented for the first time in the study area is considered typical of the Tethyan Realm. The stratigraphical position of the benthic foraminifera species within the Upper Barremian-Lower Aptian interval is discussed. The Urgonian Limestone's of the studied section are comparable with adjacent areas of eastern Serbia and Romanian South Carpathians. .

scholarly journals 70 kD stress protein (Hsp70) analysis in living shallow-water benthic foraminifera

2012 ◽  
Vol 8 (7) ◽  
pp. 677-681 ◽  
Author(s):  
Petra Heinz ◽  
Roman A. Marten ◽  
Valiyaparambil N. Linshy ◽  
Timo Haap ◽  
Emmanuelle Geslin ◽  
...  
Keyword(s):  
Shallow Water ◽  
Benthic Foraminifera ◽  
Stress Protein

The propagule method as a tool to study assemblage dynamics in benthic foraminifera: An example with pH variations

2021 ◽  
Author(s):  
Anna E. Weinmann ◽  
Susan T. Goldstein ◽  
Maria V. Triantaphyllou ◽  
Martin R. Langer
Keyword(s):  
Shallow Water ◽  
Benthic Foraminifera ◽  
Environmental Changes ◽  
Ph Gradients ◽  
Local Conditions ◽  
Recovery Mechanisms ◽  
Decreasing Ph ◽  
Set Up ◽  
Ph Variations ◽  
Insight Into

<p>Benthic foraminifera are important indicators for ecological studies. The assemblage composition of local communities can be used to analyze influences of environmental variables such as temperature, salinity, pH, and others. In recent years, the experimental propagule method has emerged as an effective tool to evaluate the influence of these variables on assemblage dynamics of benthic foraminifera. Propagules (tiny juveniles) of benthic foraminifera are widespread and can survive outside of a species’ natural distribution range. Their ability to become dormant and be re-activated once local conditions become suitable, is an important driver behind the capacity of foraminiferal assemblages to react quickly to environmental changes. In the laboratory, the propagules are first separated from the coarser fractions by sieving and then cultured under different conditions.</p><p>In the present study, we analyzed the effect of ocean pH on the composition of shallow-water assemblages from Corfu Island (Greece). Like other calcifying organisms, assemblages of foraminifera are susceptible to pH variations and have revealed compositional shifts along natural or experimental pH gradients. Our experimental set-up included four pH treatments between 6.5 and 8.5 at constant temperature and salinity (22°C and 38 ppt) for 5 weeks.</p><p>At the conclusion of the cultivation experiment, we found high numbers of grown specimens (825–1564 per replicate) and a high survivability rate throughout all treatments (78–87%). Higher pH (7.8 and 8.5) resulted in assemblages that were dominated by monothalamous and porcelaneous species, whereas lower pH (6.5 and 7.2) lead to a reduction in porcelaneous and an increase in agglutinated species. Several taxa showed significant positive or negative correlations with decreasing pH values.</p><p>Our results are congruent with previous findings that reported compositional shifts from calcareous to agglutinated taxa with decreasing pH (both from culture and field observations). Our study also indicates that the activation of propagules is an important mechanism behind assemblage dynamics in shallow-water foraminifera. As such, it offers an improved insight into potential resilience and recovery mechanisms of foraminiferal assemblages with regard to local or seasonal pH variations as well as ongoing ocean acidification.</p>

Benthic foraminifera from a recent, shallow-water hydrothermal environment in the Aeolian Arc (Tyrrhenian Sea)

2005 ◽  
Vol 218 (1-4) ◽  
pp. 207-229 ◽  
Author(s):  
Giuliana Panieri ◽  
Fabiano Gamberi ◽  
Michael Marani ◽  
Roberto Barbieri
Keyword(s):  
Shallow Water ◽  
Benthic Foraminifera ◽  
Tyrrhenian Sea ◽  
Aeolian Arc ◽  
Hydrothermal Environment

Imperforate Larger Benthic Foraminifera from Shallow-water Carbonate Facies (middle and Late Eocene), Zagros Mountains, Iran

2019 ◽  
Vol 49 (3) ◽  
pp. 275-302 ◽  
Author(s):  
Elham Nafarieh ◽  
Carme Boix ◽  
Erzika Cruz-Abad ◽  
Ebrahim Ghasemi-Nejad ◽  
Alireza Tahmasbi ◽  
...  
Keyword(s):  
Shallow Water ◽  
Benthic Foraminifera ◽  
Late Eocene ◽  
Photic Zone ◽  
Zagros Mountains ◽  
Carbonate Facies ◽  
Foraminiferal Assemblage ◽  
Larger Benthic Foraminifera ◽  
Water Carbonate ◽  
Shallow Water Carbonate

Abstract We studied the architecture and biostratigraphical distribution of the imperforate larger benthic foraminifera from the upper part of the Jarhum Formation in the Fars Interior (Zagros, Iran) and identified 15 taxa belonging to the families Coskinolinidae, Orbitolinidae, Austrillinidae, Praerhapydioninidae and Soritidae. This foraminiferal assemblage indicates deposition in warm, shallow (upper photic zone), relatively oligotrophic conditions compatible with an inner-ramp setting. The age attributed to the assemblage is Bartonian-earliest Priabonian.

Stratigraphic distribution of shallow-water benthic foraminifera from the Lower Cretaceous Taft formation, Central Iran (Yazd Block), with evidence for the importance of hiatuses

2020 ◽  
Vol 106 (3) ◽  
pp. 102399
Author(s):  
Masoumeh Gheiasvand ◽  
Ali Reza Ahouri ◽  
Seyed Ali Aghanabati ◽  
Morteza Taherpour-Khalil-Abad ◽  
Abbas Ghaderi
Keyword(s):  
Shallow Water ◽  
Benthic Foraminifera ◽  
Lower Cretaceous ◽  
Central Iran
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