A5012716588- Marine Sponges and Natural Products
- Marine Biology and Ecology Research
- Marine and coastal plant biology
- Coral and Marine Ecosystems Studies
- Marine Biology and Environmental Chemistry
- Marine Bivalve and Aquaculture Studies
- Microbial Natural Products and Biosynthesis
- Marine and fisheries research
- Marine Ecology and Invasive Species
- Marine and coastal ecosystems
- Synthetic Organic Chemistry Methods
- Echinoderm biology and ecology
- Isotope Analysis in Ecology
- Aquaculture disease management and microbiota
- Invertebrate Immune Response Mechanisms
- Marine Toxins and Detection Methods
- Ichthyology and Marine Biology
- Microbial Community Ecology and Physiology
- Peatlands and Wetlands Ecology
- Plant Growth Enhancement Techniques
- Bee Products Chemical Analysis
- Environmental Monitoring and Data Management
- Seaweed-derived Bioactive Compounds
- Synthesis and Biological Activity
- Water Quality Monitoring and Analysis
Carl von Ossietzky Universität Oldenburg
2011-2023
Senckenberg am Meer
2016
University of Guam
2009-2012
GEOMAR Helmholtz Centre for Ocean Research Kiel
2004-2008
Kiel University
2004
Summary We examined whether the marine macroalga Fucus vesiculosus induces defences against herbivory and, if so, which factors trigger this induction. In addition, we assessed induced are reduced after consumption stops. Induced effects were measured as changes in palatability rather than chemistry of algae. also tested for reductions growth rate to determine defence incurs metabolic costs. direct grazing, feeding on neighbouring plants, clipping and presence a non‐grazing herbivore could...
For many coastal areas of the world, a decrease in abundance and depth penetration perennial macroalgae seagrasses has been documented attributed to eutrophication. A surplus nutrients impairs seaweeds at least two ways: increased phytoplankton densities reduce light addition filamentous microalgae growing epiphytically shade their hosts. reduction limit total also observed for brown seaweed Fucus vesiculosus sites Baltic Sea. However, most cases mechanistic reason loss deduced from...
Sponges and other sessile invertebrates are lacking behavioural escape or defense mechanisms rely therefore on morphological chemical defenses. Studies from terrestrial systems marine algae demonstrated facultative defenses like induction activation to be common, suggesting that organisms also evolved increase the efficiency of their defense. However, inducible in sponges have not been investigated so far studies activated rare. We whether tropical sponge species induce response artificial...
Coral reefs are experiencing increasing anthropogenic impacts that result in substantial declines of reef-building corals and a change community structure towards other benthic invertebrates or macroalgae. Reefs around Zanzibar exposed to untreated sewage runoff from the main city Stonetown. At many these sites, sponge cover has increased over last years. Sponges one top spatial competitors on worldwide. Their success is, part, dependent their strong chemical defenses against predators,...
Abstract Sponges (Porifera) are abundant and diverse members of benthic filter feeding communities in most marine ecosystems, from the deep sea to tropical reefs. A characteristic feature is associated dense prokaryotic community present within sponge mesohyl. Previous molecular genetic studies revealed importance host identity for composition sponge-associated microbiota. However, little known whether host-specific patterns observed at 97% 16S rRNA gene sequence similarity consistent high...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 368:137-143 (2008) - DOI: https://doi.org/10.3354/meps07615 Patterns of sponge recruitment and growth on a shipwreck corroborate chemical defense resource trade-off Joseph R. Pawlik1,*, Timothy P. Henkel1, Steven E. McMurray1, Susanna López-Legentil1, Tse-Lynn Loh1, Sven Rohde2 1Department Biology Biology,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 427:83-94 (2011) - DOI: https://doi.org/10.3354/meps09044 Effects of limitation stress and disruptive on induced antigrazing defense in bladder wrack Fucus vesiculosus Florian Weinberger1,*, Sven Rohde1,2, Yvonne Oschmann1, Laila Shahnaz1,3, Sergey Dobretsov1,4, Martin Wahl1 1Leibniz-Institut für...
From the organic extracts of two Guam sponges, Rhaphoxya sp. and Suberea sp., determined to have cytotoxic chemopreventive activities, three new compounds, theonellin isocyanate (1) psammaplysins I J (5, 6), six previously reported compounds (2–4, 7–9) were isolated characterized spectroscopically (1H 13C NMR, MS, IR, UV, [α]D). The metabolites (5 6) from sponge are rare examples containing a bromotyramine moiety rather than more usual dibromo analogue. For this is first report known 2–4...
Sea cucumbers are slow-moving organisms that use morphological, but also a diverse combination of chemical defenses to improve their overall fitness and chances survival. Since defense compounds great pharmaceutical interest, we pinpoint the importance biological screenings relatively fast, informative inexpensive way identify most bioactive prior further costly elaborate pharmacological screenings. In this study, investigated presence absence 14 different sea cucumber species from three...
The high diversity of marine natural products represents promising opportunities for drug discovery, an important area in biotechnology. Within this context, high-throughput techniques such as metabolomics are extremely useful unveiling unexplored chemical at much faster rates than classical bioassay-guided approaches. Metabolomics approaches enable studying large sets metabolites, even if they produced low concentrations. Although, metabolite identification remains the main bottleneck,...
Microbial composition and diversity in marine sediments are shaped by environmental, biological, anthropogenic processes operating at different scales. However, our understanding of benthic microbial biogeography remains limited. Here, we used 16S rDNA amplicon sequencing to characterize microbiota the North Sea from top centimeter 339 sediment samples. We utilized spatially explicit statistical models, disentangle effects predictors, including bottom trawling intensity, a prevalent...
The prevalence of antigrazing defense induction and the cues triggering in marine macroalgae are generally not well understood. We examined capacity mechanisms regulation five common perennial macroalgal species from Baltic Sea, Furcellaria lumbricalis (Huds.) J. V. Lamour. , Delesseria sanguinea Phyllophora pseudoceranoides (S. G. Gmel.) Newroth et A. R. Taylor Fucus serratus L., evanescens C. Agardh. Specifically, we investigated whether direct feeding and/or waterborne on neighboring...
The invasiveness of algal species can be facilitated by chemo-ecological traits that allow the establishment invasive in a highly competitive environment. Anti-bacterial, anti-quorum sensing, anti-diatom and anti-larval properties brown macroalga Sargassum muticum three native from Oman waters were compared laboratory field experiments to assess whether these have potential facilitate invasion process. Only extract S. inhibited bacterial growth four marine strains quorum sensing reporter...
Sea cucumbers are bottom dwelling invertebrates, which mostly found on subtropical and tropical sea grass beds, sandy reef flats, or slopes. Although constantly exposed to fouling communities in these habitats, many species surprisingly free of invertebrate epibionts microfouling algae such as diatoms. In our study, we investigated the anti-fouling (AF) activities different crude extracts Indo-Pacific cucumber against diatom Cylindrotheca closterium. Nine from three genera (i.e., Holothuria,...
Sponges are one of the most dominant organisms in marine ecosystems. One reason for their success is association with microorganisms that besides host itself responsible chemical defence. Sponge abundances have been increasing on coral reefs Western Indian Ocean (WIO) and predicted to increase further rising anthropogenic impacts reefs. However, there a paucity information ecology sponges from WIO prokaryotic community composition. We used combination Illumina sequencing predictive...
Phyllodesmium is a tropical marine slug genus with about 30 described species. None of them have protective shell, and all feed on octocorals that are generally known to provide defensive compounds thus help defend the naked slugs against sympatric predators, such as fish, crabs, cephalopods, echinoderms. longicirrum species grows biggest least protected by camouflage its respective food, usually soft coral Sarcophyton. Investigation lipophilic extract single specimen P. from Great Barrier...