A5050545718- Marine Biology and Ecology Research
- Marine Biology and Environmental Chemistry
- Marine and coastal plant biology
- Coral and Marine Ecosystems Studies
- Microbial Community Ecology and Physiology
- Marine Sponges and Natural Products
- Marine Bivalve and Aquaculture Studies
- Crustacean biology and ecology
- Cephalopods and Marine Biology
- Marine Ecology and Invasive Species
- Protist diversity and phylogeny
- Environmental Toxicology and Ecotoxicology
- Diatoms and Algae Research
- Marine and coastal ecosystems
- Aquaculture disease management and microbiota
- Ocean Acidification Effects and Responses
- Scientific Computing and Data Management
- Microbial Natural Products and Biosynthesis
- Bacterial biofilms and quorum sensing
- Microplastics and Plastic Pollution
- Insect and Arachnid Ecology and Behavior
- Genomics and Phylogenetic Studies
- Aquaculture Nutrition and Growth
- Polymer Surface Interaction Studies
- Marine Toxins and Detection Methods
University of Bremen
2018-2025
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2018-2025
Australian Institute of Marine Science
2011-2015
UNSW Sydney
2008-2014
Sydney Institute of Marine Science
2011-2012
Institut de Ciències del Mar
2012
Carl von Ossietzky Universität Oldenburg
1996-2010
Hong Kong University of Science and Technology
1999-2004
University of Hong Kong
1999-2004
Summary Marine macroalgae are constantly exposed to epibacterial colonizers. The epiphytic bacterial patterns and their temporal spatial variability on host algae poorly understood. To investigate the interaction between marine bacteria, this study tested if composition of communities different was specific persisted under varying biotic abiotic environmental conditions over a 2‐year observation time frame. Epibacterial co‐occurring Fucus vesiculosus, Gracilaria vermiculophylla Ulva...
Abstract The majority of marine invertebrates produce dispersive larvae which, in order to complete their life cycles, must attach and metamorphose into benthic forms. This process, collectively referred as settlement, is often guided by habitat-specific cues. While the sources such cues are well known, links between biological activity, chemical identity, presence quantification situ largely missing. Previous work on coral larval settlement vitro has shown widespread induction crustose...
Marine microalgae sequester as much CO
The induction of larval attachment and metamorphosis benthic marine invertebrates is widely considered to rely on habitat specific cues. While microbial biofilms hard substrates have received considerable attention as signals for a wide phylogenetically diverse array invertebrates, the presumed chemical settlement produced by bacteria date not been characterized. Here we isolated fully characterized first signal from that induced acroporid coral larvae (Acropora millepora). metamorphic cue...
Abstract Disease is emerging as an important impact of global climate change, due to the effects environmental change on host organisms and their pathogens. Climate‐mediated disease can have severe consequences in natural systems, particularly when ecosystem engineers, such habitat‐formers or top predators are affected, any impacts cascade throughout entire food webs. In temperate marine ecosystems, seaweeds dominant rocky reefs. We investigated a putative bleaching affecting Delisea pulchra...
Abstract With each cell division, phytoplankton create new space for primary colonization by marine bacteria. Although this surface microenvironment is available to all planktonic bacterial colonizers, we show the assembly of consortia on a cosmopolitan diatom be highly specific and reproducible. While phytoplankton–bacteria interactions play fundamental roles in ecosystems, namely production carbon cycle, ecological paradigm behind epiphytic microbiome remains poorly understood. In...
SPECIALTY GRAND CHALLENGE article Front. Mar. Sci., 03 June 2020 | https://doi.org/10.3389/fmars.2020.00362
Host-microbe interactions play crucial roles in marine ecosystems. However, we still have very little understanding of the mechanisms that govern these relationships, evolutionary processes shape them, and their ecological consequences. The holobiont concept is a renewed paradigm biology can help to describe understand complex systems. It posits host its associated microbiota with which it interacts, form holobiont, be studied together as coherent biological functional unit biology, ecology,...
The macroalga Fucus vesiculosus carries a specific community of surface bacteria. To identify chemical compounds that possibly mediate abundance and composition algae-associated bacteria, we tested the effect surface-available algal on bacterial settlement under field conditions. Compounds thalli were separated from by extraction with organic solvents investigated growth inhibition isolates. Based in vitro data, partially purified extract fractions then exposed to colonizers vivo followed...
Surface-associated marine bacteria often produce secondary metabolites with antagonistic activities. In this study, tropodithietic acid (TDA) was identified to be responsible for the antibacterial activity of epiphytic bacterium Pseudovibrio sp. D323 and related strains. Phenol also produced by these but not directly activity. TDA shown effectively inhibit a range from various phylogenetic groups. However TDA-producers themselves were resistant are likely possess resistance mechanism...
Different bacterial community profiles were observed on the soft coral Dendronephthya sp. and an inanimate reference site using terminal restriction fragment length polymorphism analysis of DNA. To correlate observation with a chemical defense mechanism against epibiosis, antibacterial effects tissue extracts waterborne products coral-associated isolates (11 morphotypes) tested indigenous benthic (33 obtained in vicinity colonies. The bacteria inhibited growth attachment isolates, suggesting...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 229:105-112 (2002) - doi:10.3354/meps229105 Induction of larval settlement in polychaete Hydroides elegans by marine biofilms: an investigation monospecific diatom films as cues Tilmann Harder, Cindy Lam, Pei-Yuan Qian* Department Biology, Hong Kong University Science and Technology, Clear Water Bay, Kowloon,...
This study investigated whether surface-associated compounds isolated from the macroalga Fucus vesiculosus had potential to mediate microbial and/or macrobial epibiosis similar that on natural alga. To selectively yield thallus-associated and avoid contamination by intracellular algal compounds, cell lysis was monitored surface microscopy of cells chemical profiling extracts coupled gas chromatography mass spectroscopy. The optimized extraction resulted in polar non-polar extracts. extract...
The aims of this study were to determine if marine bacteria from Danish coastal waters produce antifouling compounds and could be ascribed specific niches or seasons. We further assess antibacterial effect is a good proxy for activity. isolated 110 with anti-Vibrio activity different sample types locations during 1-year sampling waters. strains identified as Pseudoalteromonas, Phaeobacter, Vibrionaceae based on phenotypic tests partial 16S rRNA gene sequence similarity. numbers bioactive...
Abstract Elevated dissolved iron concentrations in the methanic zone are typical geochemical signatures of rapidly accumulating marine sediments. These sediments often characterized by co-burial oxides with recalcitrant aromatic organic matter terrigenous origin. Thus far, predicted to either impede degradation, aiding its preservation, or identified enhance carbon oxidation via direct electron transfer. Here, we investigated effect various oxide phases differing crystallinity (magnetite,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 274:133-141 (2004) - doi:10.3354/meps274133 Waterborne polar macromolecules act as algal antifoulants in seaweed Ulva reticulata Tilmann Harder1,2, Sergey Dobretsov1, Pei-Yuan Qian1,* 1Department of Biology & Coastal Laboratory, Hong Kong University Science and Technology, Clear Water Bay, Kowloon, Kong, SAR...
Invasion success of introduced species is often attributed to a lack natural enemies as stated by the enemy release hypothesis (ERH). The ERH intuitively makes sense for specialized enemies, but it less evident why invaders in their new area escape attacks generalist enemies. A recent explains low herbivore damage on invasive plants with plant defense chemicals that are evolutionarily novel native herbivores. Support this weapon (NWH) so far based circumstantial evidence. To corroborate NWH,...