The distribution and ecology of Bathysiphon filiformis Sars and B. major de Folin (Protista, Foraminiferida) on the continental slope off North Carolina

Gooday, Andrew J.; Levin, Lisa A.; Thomas, Carrie J.; Hecker, Barbara

doi:10.2113/gsjfr.22.2.129

Cited by 60 publications

(46 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Drazen et al (1998) observed increased density and biomass of agglutinated foraminifera 4 wk after phytodetrital input in the abyssal Northeast Pacific. The large, agglutinated foraminiferan at Site 111, Bathysiphon filiformis, is known, based on protoplasmic inclusions, to ingest diatoms and other phytoplankton (Gooday et al 1992a). Although significa.nt tracer ingestion by Site 111 B. filiformis was not observed in the present study, several smaller mem.bers of the genus at Site I (mainly B. rufum) contained large amounts of diatom C (Table 2).…”

Section: Background Carbon Isotopic Signaturescontrasting

confidence: 60%

“…Rapid ingestion of fresh phytoplankton material by agglutinating protozoans has been observed in experimental systems (Altenbach 1992) and inferred in natural settings (Heeger 1990, Thiel et al 1990, Gooday et al 1992a,b, Drazen et al 1998. Agglutinated prot o z o a n~ at Site I were large and 5 to 6 times more abundant than the metazoan macrofauna (Hughes 1996, A. Gooday unpubl.…”

Section: Background Carbon Isotopic Signaturesmentioning

confidence: 94%

See 1 more Smart Citation

Macrofaunal processing of phytodetritus at two sites on the Carolina margin:in situ experiments using 13C-labeled diatoms

Levin¹,

Blair²,

Martin³

et al. 1999

Mar. Ecol. Prog. Ser.

105

View full text Add to dashboard Cite

ABSTRACT-Tracer experiments using '"-labeled diatoms Thalassiosira pseudonana were carried out at two 850 m sites (1 off Cape Fear and I11 off Cape Hatteras) on the North Carolina. USA, slope to examine patterns of macrofaunal consumption of fresh phytodetritus. Experiments examined the influence of taxon, feeding mode, body size and vertical position within the sediment column on access to surfic~al organic matter. 6IJC measurements were made on macrofaunal metazoans and agglutinating protozoans from background sediments and from sed~ment plots in which 13C-labeled diatoms were depos~ted and then sampled 0.3 h, 1 to 1.5 d , 3 1170 and 14 mo later. Significant between-site differences were observed in background 6I3C signatures of sed~ments, metazoans, and large, agglutinating protozoan~, with values 2 to 3 x 0 lower at Site I11 than at Site I. Background 6I3C signatures also varied as a function of taxon and of vertical position in the sediment column at Site 111. The background 613C value of carnivores was higher than that of surface-deposit feeders among Site I annelids, but no annelid feeding-group differences were observed at Site 111. 6I3C data from short-term (1 to 1.5 d) experiments revealed rapid diatom ingestion, primarily by agglutinated protozoans and annelids at Site I and mainly by annelids at Site 111. Selective feeding on diatoms was exhibited by paraonid polychaetes, especially Aricidea spp. Exceptionally high uptake and retention of diatom C also was observed in the maldanid Praxjllella sp., the nereid Ceratocephale sp. and several other surfacedeposit feeding polychaetes. After 14 mo, little of the diatom I3C remained at Slte 111, but high concentrations of the tracer were present in annelids and agglutlnatlng protozoans at Site 1. At both sites, nonannelid metazoans and subsurface-deposit feeding annelids exhibited the least uptake and retention of diatom C. Our hypotheses that large-bodied taxa and shallow-dwelling infauna should have greatest access to freshly deposited organic matter were not borne out. Some small, deep-dwelling taxa acquired label more readily than large or near-surface forms. Differences in tracer fates between sites reflected greater vertical mixing at Site 111. These results indicate heterogeneity in benthic processes along the, Carolina margin, but suggest that labile organic matter is consumed qu~ckly at both sites Because most of the taxa found to consume freshly deposited diatoms in these r~xpenments are typical of bathyal settings, we infer that phytodetritus reaching the seabed in margin environments is rapidly processed by protozoan and metazoan components of the benthlc fauna.

show abstract

Section: Background Carbon Isotopic Signaturescontrasting

confidence: 60%

Section: Background Carbon Isotopic Signaturesmentioning

confidence: 94%

Macrofaunal processing of phytodetritus at two sites on the Carolina margin:in situ experiments using 13C-labeled diatoms

Levin¹,

Blair²,

Martin³

et al. 1999

Mar. Ecol. Prog. Ser.

105

View full text Add to dashboard Cite

show abstract

“…Samples collected on more eutrophic bathyal continental margins often yield numerous large foraminiferans belonging to agglutinated taxa, such as Bathysiphon, Hyperammina, Marsipella and Rhabdammina, which have relatively robust, tubular tests (Gooday 1990, Gooday et al 1997. These are visually conspicuous epifaunal organisms, often protruding from box core surfaces and sometimes clearly visible to the unaided eye in seafloor photographs or from submersibles , Gooday et al 1992a). The ecological role of these large foraminiferans is not well understood.…”

Section: Introductionmentioning

confidence: 99%

Ecology and nutrition of the large agglutinated foraminiferan Bathysiphon capillare in the bathyal NE Atlantic: distribution within the sediment profile and lipid biomarker composition

Gooday¹,

Pond²,

Bowser³

2002

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

The large agglutinated foraminiferan Bathysiphon capillare de Folin (Protista) was an important component of the macrofauna in box core samples recovered at a 950 m site on the southern flank of the Wyville-Thomson Ridge, northern Rockall Trough. The long, narrow, very smooth, flexible tubes of B. capillare reached a maximum length of almost 10 cm. Densities ranged from 100 to 172 ind. m -2 , a figure that represents at least 5 to 9% of metazoan macrofaunal densities. This infaunal species usually adopted a more or less horizontal orientation within the upper 5 cm layer of brownish sandy silt. Its cytoplasm yielded a diverse spectrum of fatty acids. These included various monounsaturated fatty acids (39% of total), mainly 18:1(n-7), 20:1(n-9) and 22:1(n-7), the polyunsaturated fatty acids (PUFA) 20:4(n-6), 20.5(n-3) and 22.6(n-3), and non-methylene diene-interrupted fatty acids (NMIDS), particularly 22:2∆7,13 and 22:2∆7,15. The spectrum of PUFAs is consistent with the ingestion by B. capillare of phytodetrital material. However, the presence of NMIDS, reported here for the first time in a protist, provides evidence for a substantial bacterial component in the diet. Viewed by scanning electron microscopy (SEM), the cytoplasm occupied a narrow space between the inner organic test lining and an inner core of detritus around which it formed a sheath. The core material included numerous spherical structures (2 to 10 µm diameter) that we interpret as stercomata (waste pellets composed largely of mineral grains). Taken together, our observations suggest that B. capillare is a deposit feeder, consuming sediment, detritus and associated bacteria. Other deep infaunal foraminiferans probably have a similar diet, leading us to speculate that these protists, which are often abundant in dysoxic settings, may contribute significantly to carbon cycling in the deep sea. Since B. capillare and similar large Bathysiphon species can be recovered in good condition from bathyal depths, they may prove to be ideal experimental subjects for addressing some fundamental issues in the lipid biochemistry of deep-sea benthic organisms.

show abstract

“…Specimens of Bathysiphon constitute a few percent to over 50% of the foraminiferal tests in each sample. Bathysiphon and Nothia are creep ing forms existing as epifauna or shallow infauna, and are incorrectly assigned to the morphogroup of erect epifauna (Gooday et al 1992, Kaminski & Geroch 1992, Geslin et al 2004). In the ana lysed material, the samples obtained from the low est part of the Green shales succession preserve fragments of large shells of Bathysiphon that are over 2 mm across.…”

Section: Foraminiferal Assemblagesremarks (Figs 5-8)mentioning

confidence: 99%

The Eocene Hieroglyphic beds and Green shales in the Rożnów Lake area (Silesian Nappe, Outer Carpathians) - facies development and biostratigraphy

Waśkowska

2014

geol

View full text Add to dashboard Cite

Abstract:In the lithostratigraphic section of a sedimentary sequence of the Silesian Nappe in the area of Rożnów Lake, the strata that occur above the Ciężkowice sandstone and below the Globigerina marls are represented by a relatively thin unit informally named the Hieroglyphic beds and a succeeding thick complex of so-called Green shales. The Hieroglyphic beds, deposited over a short time interval during the Lutetian time (Reticulophragmium amplectens zone), are followed by the Green shales that were deposited from the Lutetian to the Priabonian (Reticulophrgamium amplectens, Ammodisus latus, Reticulophragmium rotundidorstum zones). This work describes the foraminiferal assemblages, on the basis of which, the age of the Green shales was established that in the area of Rożnów Lake. Deposition of the Green shale unit started in the Lutetian, while in other regions of the Silesian Basin it is documented from the Priabonian. The upper boundary of the Green shales is isochronous and defined by the base of the calcareous horizon of a specific type of marls known as the Globigerina marls.

show abstract

The distribution and ecology of Bathysiphon filiformis Sars and B. major de Folin (Protista, Foraminiferida) on the continental slope off North Carolina

Cited by 60 publications

References 0 publications

Macrofaunal processing of phytodetritus at two sites on the Carolina margin:in situ experiments using 13C-labeled diatoms

Macrofaunal processing of phytodetritus at two sites on the Carolina margin:in situ experiments using 13C-labeled diatoms

Ecology and nutrition of the large agglutinated foraminiferan Bathysiphon capillare in the bathyal NE Atlantic: distribution within the sediment profile and lipid biomarker composition

The Eocene Hieroglyphic beds and Green shales in the Rożnów Lake area (Silesian Nappe, Outer Carpathians) - facies development and biostratigraphy

Contact Info

Product

Resources

About