Katherine Dougan

Katherine Dougan
The University of Queensland | UQ · School of Chemistry & Molecular Biosciences

Doctor of Philosophy

About

23
Publications
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148
Citations

Publications

Publications (23)
Article
Full-text available
Corals host diverse microbial communities that are involved in acclimatization, pathogen defense, and nutrient cycling. Surveys of coral-associated microbes have been particularly directed toward Symbiodinium and bacteria. However, a holistic understanding of the total microbiome has been hindered by a lack of analyses bridging taxonomically dispar...
Article
Full-text available
The luminous bacterial symbionts of anomalopid flashlight fish are thought to be obligately dependent on their hosts for growth and share several aspects of genome evolution with unrelated obligate symbionts, including genome reduction. However, in contrast to most obligate bacteria, anomalopid symbionts have an active environmental phase that may...
Article
Characteristics of the life history of the coral reef-dwelling cardinalfish Siphamia tubifer, from Okinawa, Japan, were defined. A paternal mouthbrooder, S. tubifer, is unusual in forming a bioluminescent symbiosis with Photobacterium mandapamensis. The examined S. tubifer (n = 1273) ranged in size from 9·5 to 43·5 mm standard length (LS ), and the...
Chapter
Coral reefs are critically supported by symbiosis with dinoflagellate algae in the family Symbiodiniaceae. The tightly linked coral-Symbiodiniaceae symbiosis is central to coral health because the algae provide the coral with most of their nutrition via the translocation of photosynthates; breakdown of this symbiosis leads to bleaching and eventual...
Article
Full-text available
Dinoflagellates of the family Symbiodiniaceae are crucial photosymbionts in corals and other marine organisms. Of these, Cladocopium goreaui is one of the most dominant symbiont species in the Indo-Pacific. Here, we present an improved genome assembly of C. goreaui combining new long-read sequence data with previously generated short-read data. Inc...
Preprint
Dinoflagellates are a large, ecologically important phylum of marine unicellular algae. Their huge genomes make it highly challenging to decipher the genetic basis of key processes such as harmful algal bloom (HAB) formation and response to warming oceans. To address these issues, we generated a high quality genome assembly from Prorocentrum cordat...
Preprint
Dinoflagellates of the family Symbiodiniaceae are crucial photosymbionts in corals and other marine organisms. Of these algae, Cladocopium goreaui is one of the most dominant symbiont species in the Indo-Pacific. Here, we present an improved genome assembly of C. goreaui combining new long-read sequence data with earlier generated short-read data....
Article
Full-text available
Herbicides are commonly deployed as the front-line treatment to control infestations of weeds in native ecosystems and among crop plants in agriculture. However, the prevalence of herbicide resistance in many species is a major global challenge. The specificity and effectiveness of herbicides acting on diverse weed species are tightly linked to tar...
Article
Full-text available
Dinoflagellates of the family Symbiodiniaceae are predominantly essential symbionts of corals and other marine organisms. Recent research reveals extensive genome sequence divergence among Symbiodiniaceae taxa and high phylogenetic diversity hidden behind subtly different cell morphologies. Using an alignment-free phylogenetic approach based on sub...
Article
Modern microbial taxonomy generally relies on the use of single marker genes or sets of concatenated genes to generate a framework for the delineation and classification of organisms at different taxonomic levels. However, given that DNA is the 'blueprint of life', and hence the ultimate arbiter of taxonomy, classification systems should attempt to...
Article
Full-text available
Ethanol production from sugarcane is a key renewable fuel industry in Brazil. Major drivers of this alcoholic fermentation are Saccharomyces cerevisiae strains that originally were contaminants to the system and yet prevail in the industrial process. Here we present newly sequenced genomes (using Illumina short-read and PacBio long-read data) of tw...
Article
Full-text available
Background Dinoflagellates in the family Symbiodiniaceae are important photosynthetic symbionts in cnidarians (such as corals) and other coral reef organisms. Breakdown of the coral-dinoflagellate symbiosis due to environmental stress (i.e. coral bleaching) can lead to coral death and the potential collapse of reef ecosystems. However, evolution of...
Article
The green alga Ostreobium is an important coral holobiont member, playing key roles in skeletal decalcification and providing photosynthate to bleached corals that have lost their dinoflagellate endosymbionts. Ostreobium lives in the coral’s skeleton, a low-light environment with variable pH and O2 availability. We present the Ostreobium nuclear ge...
Article
Full-text available
Reef-building corals face a multitude of threats not only from global climate change but also local stressors such as nutrient pollution. Nutrient enrichment can amplify the negative effects of predation on corals by facilitating dysbiosis in the coral microbiome that leads to coral mortality. These patterns suggest that nutrient pollution might su...
Article
Available from: https://onlinelibrary.wiley.com/share/author/SNJGTKBFR54XPCAY3YZT?target=10.1111/mec.15300 Reef‐building corals depend upon a nutritional endosymbiosis with photosynthetic dinoflagellates of the family Symbiodiniaceae for the majority of their energetic needs. While this mutualistic relationship is impacted by numerous stressors, w...
Preprint
Full-text available
Warming oceans disrupt the critical endosymbiosis between corals and their photosynthetic dinoflagellate endosymbionts of the family Symbiodiniaceae. Durusdinium trenchii is a heat-tolerant species of Symbiodiniaceae and enhances survival of its coral host, but the basis for tolerance is largely unknown. To identify the underpinnings of heat tolera...
Data
Supplemental Figure 1. Maximum likelihood phylogeny with the partial 16S rRNA gene showing the phylogenetic relation between bOTU1, the top BLAST hits and all SAR116 bacteria in the SILVA reference alignment, with the exception of KJ589655, HQ673528 and KF271096 which clustered outside of the SAR116 clade. SAR116 bacterial sequences acquired from s...
Data
Supplemental Figure 2. Maximum likelihood phylogeny with the partial 16S rRNA gene showing the phylogenetic relation between bOTU3 and clonal sequences from corals, Candidatus Lariskella, Candidatus Midichloria and other Rickettsiales genera. The optimal model (GTR+I+G) was selected based on the AIC criterion. The maximum likelihood analysis was co...

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