GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Prevention of oculopharyngeal muscular dystrophy-associated aggregation of nuclear poly(A)-binding protein with a single-domain intracellular antibody
    Oxford University Press (OUP) ; 2006
    In:  Human Molecular Genetics Vol. 15, No. 1 ( 2006-01-01), p. 105-111
    Details
    In: Human Molecular Genetics, Oxford University Press (OUP), Vol. 15, No. 1 ( 2006-01-01), p. 105-111
    Type of Medium: Online Resource
    ISSN: 1460-2083 , 0964-6906
    URL: Article
    DOI: 10.1093/hmg/ddi432
    RVK:
    XA 10000
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2006
    detail.hit.zdb_id: 1474816-2
    detail.hit.zdb_id: 1108742-0
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    The important role of sponges in carbon and nitrogen cycling in a deep‐sea biological hotspot
    Wiley ; 2022
    In:  Functional Ecology Vol. 36, No. 9 ( 2022-09), p. 2188-2199
    Details
    In: Functional Ecology, Wiley, Vol. 36, No. 9 ( 2022-09), p. 2188-2199
    Abstract: Ansammlungen von Tiefseeschwämmen (sog. Schwammböden) sind Hotspots der Biodiversität und Biomasse in der Tiefsee, ähnlich wie Oasen in der Wüste. Es bleibt weitgehend ungeklärt, wie Schwammböden in diesem nahrungsarmen Ökosystem überleben können. Hier entschlüsseln wir, wie Schwämme und deren zugehörige Fauna dort überleben können, indem wir ihre Nahrungsquellen und Wechselwirkungen innerhalb des Nahrungsnetzes identifizieren. Dafür haben wir die Isotopenzusammensetzung der Fauna und potentiellen Nahrungsquellen analysiert, was Rückschlüsse auf die Zusammensetzung ihrer Nahrung zulässt. Schwämme zeigten eine andere Isotopenzusammensetzung als von Filtrieren erwartet, abhängig von der Anzahl an Mikroben in ihrem Gewebe. Unsere Studie zeigt, dass Schwämme mit einer hohen Anzahl an Mikroorganismen, bei denen Mikroben bis zu 60 % der Schwammbiomasse ausmachen können, am Fuß des Nahrungsnetzes stehen. Dies deutet darauf hin, dass sie in der Lage sind, im Wasser gelöste Nährstoffe zu nutzen, die für Tiere im Allgemeinen unzugänglich sind. Im Kontrast dazu hatten Schwämme deren Anzahl an Mikroben zwei bis vier Größenordnungen niedriger sind, eine Isotopenzusammensetzung, die einem Raubtier an der Spitze des Nahrungsnetzes ähnelt. Dies scheint das Ergebnis sehr effizienter Recyclingwege zu sein, welche weiterhin unbekannt sind. Zusätzliche spezifische Isotopenanalysen, bei denen wir die Isotopenzusammensetzung der einzelnen Aminosäuren analysierten, zeigte eine realistischere Position von Schwämmen im Nahrungsnetz und ordneten Schwämme mit geringer Anzahl an Mikroben den Filtrierern zu, was ihrer zu erwartenden Ernährungsweise entspricht. Darüber hinaus konnten wir zeigen, dass die zugehörige Fauna sich auch von Schwämmen ernährte. Dies zeigt, dass Tiefseeschwammböden nicht dem klassischen Tiefseenahrungsnetz entsprechen und Schwämme eine zusätzliche Basis durch das Einbringen von Ressourcen in das Nahrungsnetz darstellen. Dadurch sind Schwämme der Schlüssel zur Erhaltung von lebendigen Tiefseeökosystemen wie Schwammböden und wahrscheinlich auch in vielen anderen Ökosystemen in denen sie vorkommen (z. B. Kaltwasserkorallenriffe), und könnten so Auswirkungen auf das globale Meeresökosystem sowie biogeochemische Kreisläufe haben.
    Type of Medium: Online Resource
    ISSN: 0269-8463 , 1365-2435
    URL: Issue
    URL: Article
    DOI: 10.1111/fec.v36.9
    DOI: 10.1111/1365-2435.14117
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2020307-X
    detail.hit.zdb_id: 619313-4
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Bacterial precursors and unsaturated long-chain fatty acids are biomarkers of North-Atlantic deep-sea demosponges
    Public Library of Science (PLoS) ; 2021
    In:  PLOS ONE Vol. 16, No. 1 ( 2021-1-27), p. e0241095-
    Details
    In: PLOS ONE, Public Library of Science (PLoS), Vol. 16, No. 1 ( 2021-1-27), p. e0241095-
    Abstract: Sponges produce distinct fatty acids (FAs) that (potentially) can be used as chemotaxonomic and ecological biomarkers to study endosymbiont-host interactions and the functional ecology of sponges. Here, we present FA profiles of five common habitat-building deep-sea sponges (class Demospongiae, order Tetractinellida), which are classified as high microbial abundance (HMA) species. Geodia hentscheli , G . parva , G . atlantica , G . barretti , and Stelletta rhaphidiophora were collected from boreal and Arctic sponge grounds in the North-Atlantic Ocean. Bacterial FAs dominated in all five species and particularly isomeric mixtures of mid-chain branched FAs (MBFAs, 8- and 9-Me-C 16:0 and 10- and 11-Me-C 18:0 ) were found in high abundance (together ≥ 20% of total FAs) aside more common bacterial markers. In addition, the sponges produced long-chain linear, mid- and a(i)- branched unsaturated FAs (LCFAs) with a chain length of 24‒28 C atoms and had predominantly the typical Δ 5,9 unsaturation, although the Δ 9,19 and (yet undescribed) Δ 11,21 unsaturations were also identified. G . parva and S . rhaphidiophora each produced distinct LCFAs, while G . atlantica , G . barretti , and G . hentscheli produced similar LCFAs, but in different ratios. The different bacterial precursors varied in carbon isotopic composition (δ 13 C), with MBFAs being more enriched compared to other bacterial (linear and a ( i )-branched) FAs. We propose biosynthetic pathways for different LCFAs from their bacterial precursors, that are consistent with small isotopic differences found in LCFAs. Indeed, FA profiles of deep-sea sponges can serve as chemotaxonomic markers and support the concept that sponges acquire building blocks from their endosymbiotic bacteria.
    Type of Medium: Online Resource
    ISSN: 1932-6203
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    DOI: 10.1371/journal.pone.0241095
    DOI: 10.1371/journal.pone.0241095.g001
    DOI: 10.1371/journal.pone.0241095.g002
    DOI: 10.1371/journal.pone.0241095.g003
    DOI: 10.1371/journal.pone.0241095.g004
    DOI: 10.1371/journal.pone.0241095.g005
    DOI: 10.1371/journal.pone.0241095.t001
    DOI: 10.1371/journal.pone.0241095.t002
    DOI: 10.1371/journal.pone.0241095.s001
    DOI: 10.1371/journal.pone.0241095.s002
    DOI: 10.1371/journal.pone.0241095.s003
    DOI: 10.1371/journal.pone.0241095.r001
    DOI: 10.1371/journal.pone.0241095.r002
    DOI: 10.1371/journal.pone.0241095.r003
    DOI: 10.1371/journal.pone.0241095.r004
    Language: English
    Publisher: Public Library of Science (PLoS)
    Publication Date: 2021
    detail.hit.zdb_id: 2267670-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts
    Springer Science and Business Media LLC ; 2020
    In:  Scientific Reports Vol. 10, No. 1 ( 2020-10-15)
    Details
    In: Scientific Reports, Springer Science and Business Media LLC, Vol. 10, No. 1 ( 2020-10-15)
    Abstract: Deep-sea sponges create hotspots of biodiversity and biological activity in the otherwise barren deep-sea. However, it remains elusive how sponge hosts and their microbial symbionts acquire and process food in these food-limited environments. Therefore, we traced the processing (i.e. assimilation and respiration) of 13 C- and 15 N-enriched dissolved organic matter (DOM) and bacteria by three dominant North Atlantic deep-sea sponges: the high microbial abundance (HMA) demosponge Geodia barretti , the low microbial abundance (LMA) demosponge Hymedesmia paupertas , and the LMA hexactinellid Vazella pourtalesii . We also assessed the assimilation of both food sources into sponge- and bacteria-specific phospholipid-derived fatty acid (PLFA) biomarkers. All sponges were capable of assimilating DOM as well as bacteria. However, processing of the two food sources differed considerably between the tested species: the DOM assimilation-to-respiration efficiency was highest for the HMA sponge, yet uptake rates were 4–5 times lower compared to LMA sponges. In contrast, bacteria were assimilated most efficiently and at the highest rate by the hexactinellid compared to the demosponges. Our results indicate that phylogeny and functional traits (e.g., abundance of microbial symbionts, morphology) influence food preferences and diet composition of sponges, which further helps to understand their role as key ecosystem engineers of deep-sea habitats.
    Type of Medium: Online Resource
    ISSN: 2045-2322
    URL: Article
    DOI: 10.1038/s41598-020-74670-0
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2020
    detail.hit.zdb_id: 2615211-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Data_Sheet_1.docx
    Frontiers Media SA ; 2021
    In:  Frontiers in Marine Science Vol. 7 ( 2021-1-18)
    Details
    In: Frontiers in Marine Science, Frontiers Media SA, Vol. 7 ( 2021-1-18)
    Abstract: Deep-sea sponges and their microbial symbionts transform various forms of carbon (C) and nitrogen (N) via several metabolic pathways, which, for a large part, are poorly quantified. Previous flux studies on the common deep-sea sponge Geodia barretti consistently revealed net consumption of dissolved organic carbon (DOC) and oxygen (O 2 ) and net release of nitrate ( NO 3 - ). Here we present a biogeochemical metabolic network model that, for the first time, quantifies C and N fluxes within the sponge holobiont in a consistent manner, including many poorly constrained metabolic conversions. Using two datasets covering a range of individual G. barretti sizes (10–3,500 ml), we found that the variability in metabolic rates partially resulted from body size as O 2 uptake allometrically scales with sponge volume. Our model analysis confirmed that dissolved organic matter (DOM), with an estimated C:N ratio of 7.7 ± 1.4, is the main energy source of G. barretti. DOM is primarily used for aerobic respiration, then for dissimilatory NO 3 - reduction to ammonium ( NH 4 + ) (DNRA), and, lastly, for denitrification. Dissolved organic carbon (DOC) production efficiencies (production/assimilation) were estimated as 24 ± 8% (larger individuals) and 31 ± 9% (smaller individuals), so most DOC was respired to carbon dioxide (CO 2 ), which was released in a net ratio of 0.77–0.81 to O 2 consumption. Internally produced NH 4 + from cellular excretion and DNRA fueled nitrification. Nitrification-associated chemoautotrophic production contributed 5.1–6.7 ± 3.0% to total sponge production. While overall metabolic patterns were rather independent of sponge size, (volume-)specific rates were lower in larger sponges compared to smaller individuals. Specific biomass production rates were 0.16% day –1 in smaller compared to 0.067% day –1 in larger G. barretti as expected for slow-growing deep-sea organisms. Collectively, our approach shows that metabolic modeling of hard-to-reach, deep-water sponges can be used to predict community-based biogeochemical fluxes and sponge production that will facilitate further investigations on the functional integration and the ecological significance of sponge aggregations in deep-sea ecosystems.
    Type of Medium: Online Resource
    ISSN: 2296-7745
    URL: Article
    URL: Article
    DOI: 10.3389/fmars.2020.596251
    DOI: 10.3389/fmars.2020.596251.s001
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2757748-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Data_Sheet_1.zip
    Frontiers Media SA ; 2021
    In:  Frontiers in Marine Science Vol. 8 ( 2021-5-4)
    Details
    In: Frontiers in Marine Science, Frontiers Media SA, Vol. 8 ( 2021-5-4)
    Abstract: Sponges play a key role in (re)cycling of dissolved organic matter (DOM) and inorganic nutrients in coral reef ecosystems. Macroalgae and corals release different quantities of DOM and at different bioavailabilities to sponges and their microbiome. Given the current coral- to algal-dominance shift on coral reefs, we assessed the differential processing of macroalgal- and coral-DOM by three high and three low microbial abundance (HMA and LMA) encrusting sponge species. We followed the assimilation of naturally sourced 13 C- and 15 N-enriched macroalgal- and coral-DOM into bulk tissue and into host- versus bacteria-specific phospholipid fatty acids (PLFAs). Additionally, we compared sponge-processing of the two natural DOM sources with 13 C- and 15 N-enriched laboratory-made diatom-DOM. All investigated sponges utilized all DOM sources, with higher assimilation rates in LMA compared to HMA sponges. No difference was found in carbon assimilation of coral- versus macroalgal-DOM into bulk tissue and host- versus bacteria-specific PLFAs, but macroalgal nitrogen was assimilated into bulk tissue up to eight times faster compared to the other sources, indicating its higher bioavailability to the sponges. Additionally, LMA sponges released significantly more inorganic nitrogen after feeding on macroalgal-DOM. Therefore, we hypothesize that, depending on the abundance and composition of the sponge community, sponges could catalyze reef eutrophication through increased turnover of nitrogen under coral-to-algal regime shifts.
    Type of Medium: Online Resource
    ISSN: 2296-7745
    URL: Article
    URL: Article
    DOI: 10.3389/fmars.2021.640583
    DOI: 10.3389/fmars.2021.640583.s001
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2757748-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Impact of trophic state on the distribution of intact polar lipids in surface waters of lakes
    Wiley ; 2016
    In:  Limnology and Oceanography Vol. 61, No. 3 ( 2016-05), p. 1065-1077
    Details
    In: Limnology and Oceanography, Wiley, Vol. 61, No. 3 ( 2016-05), p. 1065-1077
    Abstract: We characterized the intact polar lipid (IPL) composition in the surface waters of 22 lakes from Minnesota and Iowa, ranging in trophic state between eutrophic and oligo‐mesotrophic, to investigate the impact of trophic state on IPL composition. A high diversity of IPL classes was detected. Most IPL classes were detected in all lakes, but the eutrophic lakes contained a significantly higher relative abundance of lyso‐phosphatidylcholine (PC) than the oligo‐mesotrophic lakes, which in turn were characterized by significantly higher relative abundance of hydroxymethyltrimethyl‐alanine/trimethyl‐homoserine (DGTA/DGTS) betaines, ornithine lipids and the recently discovered trimethyl ornithine (TMO) lipids. The higher relative abundance of ornithines and TMOs may relate to a higher contribution of heterotrophic bacteria relative to phytoplankton while the higher abundance of the DGTA/DGTS betaines may relate to substitution by microorganisms of these non‐P lipids for PC under P‐stress, as has been observed in other environments. We also detected a variety of heterocyst glycolipids (HGs) derived from N 2 ‐fixing heterocystous Cyanobacteria in all lakes, suggesting the presence of these Cyanobacteria in the full range of trophic conditions. Correlation of HG abundance with environmental data showed that high productivity lakes have high HG abundances, while other distributional differences in HGs, which did not correlate with environmental parameters, are likely due to differences in species composition. We conclude that the significant differences in IPL composition between the eutrophic and oligo‐mesotrophic lakes are either due to adaptation of the membrane composition to nutrient conditions or due to general divergences in microbial composition under the different conditions.
    Type of Medium: Online Resource
    ISSN: 0024-3590 , 1939-5590
    URL: Issue
    URL: Article
    DOI: 10.1002/lno.v61.3
    DOI: 10.1002/lno.10274
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2033191-5
    detail.hit.zdb_id: 412737-7
    SSG: 12
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Influence of lake water pH and alkalinity on the distribution of core and intact polar branched glycerol dialkyl glycerol tetraethers (GDGTs) in lakes
    Elsevier BV ; 2013
    In:  Organic Geochemistry Vol. 60 ( 2013-7), p. 72-82
    Details
    In: Organic Geochemistry, Elsevier BV, Vol. 60 ( 2013-7), p. 72-82
    Type of Medium: Online Resource
    ISSN: 0146-6380
    URL: Article
    DOI: 10.1016/j.orggeochem.2013.04.015
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2013
    detail.hit.zdb_id: 2018075-5
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Cyanobacteria as a carbon source for zooplankton in eutrophic Lake Taihu, China, measured by 13 C labeling and fatty acid biomarkers
    Wiley ; 2012
    In:  Limnology and Oceanography Vol. 57, No. 4 ( 2012-07), p. 1245-1254
    Details
    In: Limnology and Oceanography, Wiley, Vol. 57, No. 4 ( 2012-07), p. 1245-1254
    Abstract: Using a combined stable‐isotope and fatty‐acid approach, we examined carbon‐transfer routes from the cyanobacterium Microcystis to zooplankton in eutrophic Lake Taihu, China. Microcystis is generally considered poor food for zooplankton, and we hypothesized that most Microcystis carbon flows to zooplankton via dissolved organic matter (DOM)‐bacteria and detritus‐bacteria pathways rather than via direct grazing. The hypothesis was tested by analyzing 13 C isotopes at natural abundance in field samples and in tracer experiments with 13 C‐enriched Microcystis . 13 C‐enriched Microcystis was added as live Microcystis, Microcystis detritus, or Microcystis DOM to lake‐water incubations with Bosmina sp. and Daphnia similis as the dominant species. The 13 C isotope signatures of Microcystis, heterotrophic bacteria, and eukaryotic algae in seston were determined from isotope analyses of specific fatty acids, and the presence and labeling of these fatty acids were also analyzed in zooplankton consumers. Bosmina and Daphnia consumed carbon via all pathways, but the amount of carbon transfer from the Microcystis DOM was the highest, followed by the Microcystis detritus. Bosmina consumed relatively more live Microcystis than Daphnia . The presence and high 13 C enrichment of bacteria‐specific fatty acids in the zooplankton consumers showed that heterotrophic bacteria were an important link between Microcystis and zooplankton. Microbial pathways dominate the energy flow from cyanobacteria to zooplankton in eutrophic lakes with heavy cyanobacteria blooms, such as Lake Taihu.
    Type of Medium: Online Resource
    ISSN: 0024-3590 , 1939-5590
    URL: Article
    DOI: 10.4319/lo.2012.57.4.1245
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 2033191-5
    detail.hit.zdb_id: 412737-7
    SSG: 12
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Habitat types and megabenthos composition from three sponge-dominated high-Arctic seamounts
    Springer Science and Business Media LLC ; 2022
    In:  Scientific Reports Vol. 12, No. 1 ( 2022-11-29)
    Details
    In: Scientific Reports, Springer Science and Business Media LLC, Vol. 12, No. 1 ( 2022-11-29)
    Abstract: Seamounts are isolated underwater mountains stretching  〉  1000 m above the seafloor. They are identified as biodiversity hotspots of marine life, and host benthic assemblages that may vary on regional (among seamounts) and local (within seamounts) scales. Here, we collected seafloor imagery of three seamounts at the Langseth Ridge in the central Arctic Ocean to assess habitats and megabenthos community composition at the Central Mount (CM), the Karasik Seamount (KS), and the Northern Mount (NM). The majority of seafloor across these seamounts comprised bare rock, covered with a mixed layer of sponge spicule mats intermixed with detrital debris composed of polychaete tubes, and sand, gravel, and/or rocks. The megabenthos assemblages consisted of in total 15 invertebrate epibenthos taxa and 4 fish taxa, contributing to mean megabenthos densities of 55,745 ind. ha −1 at CM, 110,442 ind. ha −1 at KS, and 65,849 ind. ha −1 at NM. The faunal assemblages at all three seamounts were dominated by habitat-forming Tetractinellida sponges that contributed between 66% (KS) and 85% (CM) to all megabenthos. Interestingly, taxa richness did not differ at regional and local scale, whereas the megabenthos community composition did. Abiotic and biogenic factors shaping distinct habitat types played a major role in structuring of benthic communities in high-Arctic seamounts.
    Type of Medium: Online Resource
    ISSN: 2045-2322
    URL: Article
    DOI: 10.1038/s41598-022-25240-z
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2615211-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...