A REVIEW OF STUDIES ON BENTHIC FORAMINIFERA IN COLD METHANE SEEPS ENVIRONMENT

We present the initial data on the distribution of benthic foraminifera (BF) on East Siberian Sea shelf. Previous researchers analyzed BF in the sediment cores from the continental slope and basin areas of the East Siberian Sea (Wollenburg et al., 2000; Mackensen et al, 2014; Barrientos et al, 2018) but not from central shelf. Last year we received boxcorer samples of bottom sediments from the shelf of the East Siberian Sea and the Laptev Sea during the 78th cruise of research vessel Akademik Mstislav Keldysh (September-October 2019). We examined the species composition of BF assemblages of Rose Bengal-stained surface samples from 2 stations in the East Siberian Sea and 7 stations in the Laptev Sea, and compared this data set with an existing data set along the East Siberian Sea and the Laptev Sea.Recent studies (Shakhova et al, 2007, 2009, 2015; Nicolsky et al, 2009) state that the East Siberian Sea is one of the largest sources of methane emission into the atmosphere due to degradation of permafrost, ice complex retreat and decaying gas hydrates deposits. Perhaps this has an impact on the species composition of the BF assemblages and the morphological changes and defects of their shells, which we have identified. Samples from active methane seeps of the Laptev Sea have been studied to identify the relationship between methane emission and the reaction of benthic foraminifera. This data have been compared with &#8220;background&#8221; (i.e. non-venting, without any methane seeps activity) stations of the Laptev Sea and the East Siberian Sea.The identified features require further detailed study.

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Carbon stable isotopic composition of benthic foraminifera from Pliocene cold methane seeps, Cascadia accretionary margin

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2006.10.002 ◽

2007 ◽

Vol 246 (2-4) ◽

pp. 260-277 ◽

Cited By ~ 31

Author(s):

Ruth A. Martin ◽

Elizabeth A. Nesbitt ◽

Kathleen A. Campbell

Keyword(s):

Isotopic Composition ◽

Benthic Foraminifera ◽

Methane Seeps ◽

Stable Isotopic Composition ◽

Stable Isotopic

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Benthic foraminifera associated with cold methane seeps on the northern California margin: Ecology and stable isotopic composition

Marine Micropaleontology ◽

10.1016/s0377-8398(00)00005-0 ◽

2000 ◽

Vol 38 (3-4) ◽

pp. 247-266 ◽

Cited By ~ 118

Author(s):

A.E. Rathburn ◽

Lisa A. Levin ◽

Zachary Held ◽

K.C. Lohmann

Keyword(s):

Isotopic Composition ◽

Benthic Foraminifera ◽

Northern California ◽

Methane Seeps ◽

Stable Isotopic Composition ◽

Stable Isotopic

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Benthic foraminiferal zonation in deep-water carbonate platform margin environments, northern Little Bahama Bank

Journal of Paleontology ◽

10.1017/s0022336000058819 ◽

1988 ◽

Vol 62 (01) ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Ronald E. Martin

Keyword(s):

Deep Water ◽

Benthic Foraminifera ◽

Carbonate Platform ◽

Sedimentary Facies ◽

Depositional Environments ◽

Near Surface ◽

Sediment Gravity Flows ◽

Gravity Flows ◽

Platform Margin ◽

Water Carbonate

The utility of benthic foraminifera in bathymetric interpretation of clastic depositional environments is well established. In contrast, bathymetric distribution of benthic foraminifera in deep-water carbonate environments has been largely neglected. Approximately 260 species and morphotypes of benthic foraminifera were identified from 12 piston core tops and grab samples collected along two traverses 25 km apart across the northern windward margin of Little Bahama Bank at depths of 275-1,135 m. Certain species and operational taxonomic groups of benthic foraminifera correspond to major near-surface sedimentary facies of the windward margin of Little Bahama Bank and serve as reliable depth indicators. Globocassidulina subglobosa, Cibicides rugosus, and Cibicides wuellerstorfi are all reliable depth indicators, being most abundant at depths >1,000 m, and are found in lower slope periplatform aprons, which are primarily comprised of sediment gravity flows. Reef-dwelling peneroplids and soritids (suborder Miliolina) and rotaliines (suborder Rotaliina) are most abundant at depths <300 m, reflecting downslope bottom transport in proximity to bank-margin reefs. Small miliolines, rosalinids, and discorbids are abundant in periplatform ooze at depths <300 m and are winnowed from the carbonate platform. Increased variation in assemblage diversity below 900 m reflects mixing of shallow- and deep-water species by sediment gravity flows.

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Stratigraphy and larger benthic foraminifera of Middle Eocene to Middle Miocene rocks along the Tobruk-Al Bardia scarps, northeastern Cyrenaica, Libya

Stratigraphy ◽

10.29041/strat.15.3.153-178 ◽

2018 ◽

Vol 15 (3) ◽

pp. 153-178

Author(s):

Esam O. Abdulsamad ◽

Salah S. El-Ekhfifi ◽

Ahmed M. Muftah

Keyword(s):

Benthic Foraminifera ◽

Middle Miocene ◽

Middle Eocene ◽

Larger Benthic Foraminifera

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THE ABUNDANCE OF RECENT FORAMINIFERA IN SURFACE SEDIMENT OF AMBON BAY

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v2i1.7859 ◽

2010 ◽

Vol 2 (1) ◽

Author(s):

Suhartati M. Natsir

Keyword(s):

Surface Sediment ◽

Benthic Foraminifera ◽

Sea Water ◽

Planktonic Foraminifera ◽

Sediment Characteristic ◽

Abundance And Distribution

Foraminifera are generally live in sea water with various sizes. These organisms consist of planktonic and benthic foraminifera. Geological activity on plutonic and volcanic with vomiting magma is transpiring on, and then affects sedimentation and foraminiferal abundance of Ambon Bay. The study was determined to study the abundance and distribution of foraminifera based on the sediment characteristic of Ambon Bay. Sample collected in 2007 of Ambon Bay showed that only 29 samples of 50 samples containing foraminifera. The collected sediments have 86 species of foraminifera, consisting 61 species of benthic foraminifera and 25 species of planktonic foraminifera. The dominant benthic foraminifera in the surface sediment of Ambon bay were Amphistegina lessonii, Ammoniabeccarii,Elphidium craticulatum,Operculina ammonoides and Quinqueloculina parkery. The planktonic foraminifera that were frequently collected from the bay were Globorotalia tumida, Globoquadrina pseudofoliata, Globigerinoides pseudofoliata, Globigerinoides cyclostomus dan Pulleniatina finalis. Generally, the species dwelled as abundant on substrate sand, whereas the areas within substrate mud have no foraminifera lie on them. Keywords: Foraminifera, Abundance, Sediment, Ambon Bay

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