Use of lipids to study the trophic ecology of deep-sea xenophyophores

Laureillard, J.; Méjanelle, Laurence; Sibuet, Myriam

doi:10.3354/meps270129

Cited by 32 publications

(18 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The phagotrophic protists include a wide range of taxa generally within the size range of 2 to 200 µm; however, some amoeboid forms such as radiolaria and foraminifera can attain diameters of up to 25 cm (e.g. DeLaca et al 2002, Laureillard et al 2004. Phagotrophic protists include strictly heterotrophic taxa as well as mixotrophic taxa that combine phagotrophy and phototrophy by sequestering plastids derived from their prey (kleptoplastidy) or by harbouring complete algal endosymbionts (see Stoecker 1998).…”

Section: Introductionmentioning

confidence: 99%

Selective feeding behaviour of key free-living protists: avenues for continued study

Montagnes¹,

Barbosa²,

Boenigk³

et al. 2008

Aquat. Microb. Ecol.

177

154

View full text Add to dashboard Cite

Phagotrophic protists are diverse and abundant in aquatic and terrestrial environments, making them fundamental to the transfer of matter/energy within their respective food webs. Recognising their grazing impact is essential to evaluate the role of protists in ecosystems, and this includes appreciating prey selectivity. Efforts have been made by groups and individuals to understand selective grazing behaviour by protists: many approaches and perspectives have been pursued, not all of which are compatible. This article, which is not a review, is the product of our discourse on this subject at the SAME 10 meeting. It is the work of individuals, assembled for their breadth of backgrounds, approaches, views, and expertise. Firstly, to communicate ideas and approaches, we develop a framework for selective feeding processes and suggest 6 steps: searching, contact, capture, processing, ingestion, digestion. We then separate study approaches into 2 categories: (1) those examining whole organisms at the community, population, and individual levels, and (2) those examining physiology and molecular attributes. Finally, we explore general problems associated with the field of protistan selective feeding (e.g. linking food selection into food webs and modeling). We do not present all views on any one topic, nor do we cover all topics; instead, we offer opinions and suggest avenues for continued study. Overall, this paper should stimulate further discourse on the subject and provide a roadmap for the future.

show abstract

Section: Introductionmentioning

confidence: 99%

Selective feeding behaviour of key free-living protists: avenues for continued study

Montagnes¹,

Barbosa²,

Boenigk³

et al. 2008

Aquat. Microb. Ecol.

177

154

View full text Add to dashboard Cite

show abstract

“…The current study used the fatty acid composition of the gonad to explore trophic interactions of Psammechinus miliaris. These biomarkers (herein known as the fatty acid signature) have been used to explore the feeding ecology of a number of marine organisms (Pond et al 1997, Grahl-Nielsen et al 2003, Laureillard et al 2004). This technique assumes that dietary lipids are broken down into their constituent fatty acids.…”

Section: Introductionmentioning

confidence: 99%

Gonad fatty acids and trophic interactions of the echinoid Psammechinus miliaris

Hughes¹,

Catarino²,

Kelly³

et al. 2005

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Variation in gonadal somatic indices (GSI) and fatty acid signatures of 2 contrasting Scottish west coast populations of the echinoid Psammechinus miliaris were examined. P. miliaris was sampled from both the shallow subtidal and at the upper limit of its distribution in the intertidal. The intertidal population had a significantly higher GSI than the subtidal at both locations. Multivariate analysis (ANOSIM) of the fatty acid signature showed significant variation between the 2 depths as well as between sex and location. SIMPER analysis indicated a complex pattern of variation between location and depths. Both 20:4(n-6) and 20:5(n-6), associated with brown algae, were found in higher levels in subtidal populations, while levels of 22:6(n-3) were higher in the intertidal at one site, and 18:4(n-3) higher at the other. Of these acids, 22:6(n-3) is associated with filter feeding invertebrates, and 18:4(n-3) with green algae. Omnivorous diets in urchins have been associated with increased gonadal growth and the results from this study strongly suggest that the observed differences in GSI between intertidal and subtidal P. miliaris result from a higher quality diet in the intertidal, consisting of invertebrates and green algae.

show abstract

“…4) In the previous study, xenophyophores are made up of protoplasm, stercomes, and agglutinated tests. 5) Previous study has indicated that bacterial lipid compositions differ between lysed xenophyophorean cells with an agglutinated test and an reference sediment, suggesting that a unique flora develops after incorporation into the xenophyophore. 5) However, the types of bacteria inhabiting the xenophyophores and the difference in phyla between the xenophyophore sample and the reference sample were undefined.…”

mentioning

confidence: 97%

“…5) Previous study has indicated that bacterial lipid compositions differ between lysed xenophyophorean cells with an agglutinated test and an reference sediment, suggesting that a unique flora develops after incorporation into the xenophyophore. 5) However, the types of bacteria inhabiting the xenophyophores and the difference in phyla between the xenophyophore sample and the reference sample were undefined. 5) Here we present the first comparison of bacterial flora in a new xenophyophore and nearby sediment by 16S rRNA clones obtained from total RNA.…”

mentioning

confidence: 97%

“…5) However, the types of bacteria inhabiting the xenophyophores and the difference in phyla between the xenophyophore sample and the reference sample were undefined. 5) Here we present the first comparison of bacterial flora in a new xenophyophore and nearby sediment by 16S rRNA clones obtained from total RNA. 6) Our findings revealed the composition of active flora surrounding the xenophyophores.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Active Bacterial Flora Surrounding Foraminifera (Xenophyophorea) Living on the Deep-Sea Floor

Hori

Tsuchiya

Nishi

et al. 2013

Bioscience, Biotechnology, and Biochemistry

View full text Add to dashboard Cite

Use of lipids to study the trophic ecology of deep-sea xenophyophores

Cited by 32 publications

References 59 publications

Selective feeding behaviour of key free-living protists: avenues for continued study

Selective feeding behaviour of key free-living protists: avenues for continued study

Gonad fatty acids and trophic interactions of the echinoid Psammechinus miliaris

Active Bacterial Flora Surrounding Foraminifera (Xenophyophorea) Living on the Deep-Sea Floor

Contact Info

Product

Resources

About