Behavior and Response of Deep-Sea Benthic Foraminifera to Freshly Supplied Organic Matter: A Laboratory Feeding Experiment in Microcosm Environments

Nomaki, Hidetaka; Heinz, Petra; Hemleben, Christoph; Kitazato, Hiroshi

doi:10.2113/35.2.103

Cited by 67 publications

(48 citation statements)

References 24 publications

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“…Many studies in both shallow-and deep-water settings provide evidence that foraminifera, particularly calcareous species, consume algae, although other food items, notably bacteria, are also ingested (for example, see reviews in Lee, 1980;Goldstein, 1999;Murray, 2006 andGooday et al, 2008). Nomaki et al (2005aNomaki et al ( , 2006Nomaki et al ( , 2011 reported that the shallow infaunal calcareous species Uvigerina akitaensis rapidly consumed algae, particularly the marine diatom Chaetoceros sociale, during in situ 13 C-labelled feeding experiments carried out at their bathyal site in Sagami Bay. Goldstein and Corliss (1994) analysed the ultrastructure of Uvigerina peregrina from 710 m water depth in the San Pedro Basin (California Borderland) and found a variety of food items in the food vacuoles of this species.…”

Section: Discussionmentioning

confidence: 99%

“…In situ experiments at a mildly oxygen-depleted bathyal site in Sagami Bay, Japan (1450 m depth) suggest that broad differences exist in the trophic preferences of different deep-sea foraminiferal species, as well as the degree to which they respond to pulses of labile food. Thus, some species (including Uvigerina akitaensis) in Sagami Bay consume only fresh algae and are particularly active in the short-term processing of algal-derived organic matter, while others will ingest sedimentary organic matter as well as more labile material (Nomaki et al, 2005a(Nomaki et al, , 2006(Nomaki et al, , 2011. Subsequent experiments in which labelled carbon was tracked into specific fatty acids within foraminiferal cells suggested that some species (again including U. akitinensis) are able to degrade and/or synthesise some fatty acids (Nomaki et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Uptake of algal carbon and the likely synthesis of an "essential" fatty acid by Uvigerina ex. gr. semiornata (Foraminifera) within the Pakistan margin oxygen minimum zone: evidence from fatty acid biomarker and 13C tracer experiments

et al. 2014

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Abstract. Foraminifera are an important component of benthic communities in oxygen-depleted settings, where they potentially play a significant role in the processing of organic matter. We tracked the uptake of a 13 C-labelled algal food source into individual fatty acids in the benthic foraminiferal species Uvigerina ex. gr. semiornata from the Arabian Sea oxygen minimum zone (OMZ). The tracer experiments were conducted on the Pakistan margin during the late/post monsoon period (August-October 2003). A monoculture of the diatom Thalassiosira weisflogii was 13 C-labelled and used to simulate a pulse of phytoplankton in two complementary experiments. A lander system was used for in situ incubations at 140 m water depth and for 2.5 days in duration. Shipboard laboratory incubations of cores collected at 140 m incorporated an oxystat system to maintain ambient dissolved oxygen concentrations and were terminated after 5 days. Uptake of diatoms was rapid, with a high incorporation of diatom fatty acids into foraminifera after ∼ 2 days in both experiments. Ingestion of the diatom food source was indicated by the increase over time in the quantity of diatom biomarker fatty acids in the foraminifera and by the high percentage of 13 C in many of the fatty acids present at the endpoint of both in situ and laboratory-based experiments. These results indicate that U . ex. gr. semiornata rapidly ingested the diatom food source and that these foraminifera will play an important role in the short-term cycling of organic matter within this OMZ environment.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Uptake of algal carbon and the likely synthesis of an "essential" fatty acid by Uvigerina ex. gr. semiornata (Foraminifera) within the Pakistan margin oxygen minimum zone: evidence from fatty acid biomarker and 13C tracer experiments

et al. 2014

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“…Kitazato et al (2000) have proposed that deep-infaunal taxa may migrate to the sediment-seawater interface to take advantage of phytodetrital input and to reproduce. Furthermore, in laboratory experiments Nomaki et al (2005) recorded that many infaunal foraminifera, especially the taxa they classified as shallow or intermediate infauna, migrated upwards through the sediment column in response to an addition of food at the surface. This migration may be quite rapid, with foraminifera capable of moving through several millimetres of sediment in a day (e.g.…”

Section: Implications Of Sediment-seawater Interface Calcification Fomentioning

confidence: 99%

“Live” (stained) benthic foraminiferal living depths, stable isotopes, and taxonomy offshore South Georgia, Southern Ocean: implications for calcification depths

Dejardin

Kender

Allen

et al. 2018

J. Micropalaeontol.

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Abstract. It is widely held that benthic foraminifera exhibit species-specific calcification depth preferences, with their tests recording sediment pore water chemistry at that depth (i.e. stable isotope and trace metal compositions). This assumed depth-habitat-specific pore water chemistry relationship has been used to reconstruct various palaeoenvironmental parameters, such as bottom water oxygenation. However, many deepwater foraminiferal studies show wide intra-species variation in sediment living depth but relatively narrow intra-species variation in stable isotope composition. To investigate this depth-habitat-stable-isotope relationship on the shelf, we analysed depth distribution and stable isotopes of "living" (Rose Bengal stained) benthic foraminifera from two box cores collected on the South Georgia shelf (ranging from 250 to 300 m water depth). We provide a comprehensive taxonomic analysis of the benthic fauna, comprising 79 taxonomic groupings. The fauna shows close affinities with shelf assemblages from around Antarctica. We find "live" specimens of a number of calcareous species from a range of depths in the sediment column. Stable isotope ratios (δ 13 C and δ 18 O) were measured on stained specimens of three species, Astrononion echolsi, Cassidulinoides porrectus, and Buccella sp. 1, at 1 cm depth intervals within the downcore sediment sequences. In agreement with studies in deep-water settings, we find no significant intra-species variability in either δ 13 C foram or δ 18 O foram with sediment living depth on the South Georgia shelf. Our findings add to the growing evidence that infaunal benthic foraminiferal species calcify at a fixed depth. Given the wide range of depths at which we find "living", "infaunal" species, we speculate that they may actually calcify predominantly at the sediment-seawater interface, where carbonate ion concentration and organic carbon availability is at a maximum.

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“…Meiofauna represent, in turn, an important food resource for macrofauna and a variety of juvenile fish (Giere 2009). In situ and laboratory experiments give fairly accurate information on the role of foraminifera in the food web and energy transfer within benthic environments (e.g., Nomaki et al 2005aNomaki et al , 2005bNomaki et al , 2006Nomaki et al , 2009Nomaki et al , 2010Nomaki et al , 2011Würzberg et al 2011). Oxygen consumption rates in meiofaunal organisms are greater than in macrofaunal organisms (Mahaut et al 1995).…”

Section: Marine Meiofaunal Diversity and Ecosystem Functioningmentioning

confidence: 99%

Is the meiofauna a good indicator for climate change and anthropogenic impacts?

et al. 2015

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Our planet is changing, and one of the most pressing challenges facing the scientific community revolves around understanding how ecological communities respond to global changes. From coastal to deep-sea ecosystems, ecologists are exploring new areas of research to find model organisms that help predict the future of life on our planet. Among the different categories of organisms, meiofauna offer several advantages for the study of marine benthic ecosystems. This paper reviews the advances in the study of meiofauna with regard to climate change and anthropogenic impacts. Four taxonomic groups are valuable for predicting global changes: foraminifers (especially calcareous forms), nematodes, copepods and ostracods. Environmental variables are fundamental in the interpretation of meiofaunal patterns and multistressor experiments are more informative than single stressor ones, revealing complex ecological and biological interactions. Global change has a general negative effect on meiofauna, with important consequences on benthic food webs. However, some meiofaunal species can be favoured by the extreme conditions induced by global change, as they can exhibit remarkable physiological adaptations. This review highlights the need to incorporate studies on taxonomy,

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Behavior and Response of Deep-Sea Benthic Foraminifera to Freshly Supplied Organic Matter: A Laboratory Feeding Experiment in Microcosm Environments

Cited by 67 publications

References 24 publications

Uptake of algal carbon and the likely synthesis of an "essential" fatty acid by <i>Uvigerina</i> ex. gr. <i>semiornata</i> (Foraminifera) within the Pakistan margin oxygen minimum zone: evidence from fatty acid biomarker and <sup>13</sup>C tracer experiments

Uptake of algal carbon and the likely synthesis of an "essential" fatty acid by <i>Uvigerina</i> ex. gr. <i>semiornata</i> (Foraminifera) within the Pakistan margin oxygen minimum zone: evidence from fatty acid biomarker and <sup>13</sup>C tracer experiments

“Live” (stained) benthic foraminiferal living depths, stable isotopes, and taxonomy offshore South Georgia, Southern Ocean: implications for calcification depths

Is the meiofauna a good indicator for climate change and anthropogenic impacts?

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