The coral microbial ecology group has an active research program identifying and characterizing the microbial associates of both tropical and cold-water (deep-sea) corals and their surrounding habitat. Current projects focus on coral disease dynamics, bacterial diversity, and using metagenomics to elucidate the functional roles of coral microbes.
Coral microbial ecology
Coral microbial ecology is the study of the relationship of coral-associated microorganisms to each other, the coral host, and to their environment. Just as we humans have beneficial bacteria living on our skin and in our intestines, corals also have co-habitating non-pathogenic (not disease-causing) microbes. These microbes include bacteria, archaea, and fungi—representing all three of the major domains of life.
What can we learn from studying coral microbial ecology? Why is it important? Coral reefs in the Caribbean have been in decline for several decades. One of the most visible causes is disease. Coral diseases are not well understood, but the few that have been characterized are all caused by microorganisms. In order to understand the diseased state, we must first understand the healthy state. Until now, coral biology studies have been limited to studies of the coral animal, the algal symbiont, or the interactions of the two. Coral microbial-ecology studies contribute a missing piece of information to the study of overall coral biology. It has been speculated that coral-associated bacteria benefit the coral by fixing nitrogen, breaking down waste products, and cycling basic nutrients back to the photosynthetic algal symbionts (zooxanthellae). Bacteria may also ward off other potentially harmful microbes by producing antibiotics or by just occupying the available space.
The coral microbial ecology group has an active research program identifying and characterizing the microbial associates of both tropical and cold-water (deep-sea) corals and their surrounding habitat. Current projects focus on coral disease dynamics, bacterial diversity, and using metagenomics to elucidate the functional roles of coral microbes.
Below are other science projects associated with this project.
DISCOVRE - Diversity, Systematics and Connectivity of Vulnerable Reef Ecosystems Project
Microbial Processes on Reefs
Coral Disease
Below are data sets associated with this project.
Cold-water Coral Microbiomes (Primnoa spp.) from Gulf of Alaska, Baltimore Canyon, and Norfolk Canyon: Raw Data
Below are multimedia items associated with this project.
Below are publications associated with this project.
Microbiomes of stony and soft deep-sea corals share rare core bacteria
Microbial associations of four species of algal symbiont-bearing Foraminifers from the Florida Reef Tract, USA
Stability of temperate coral Astrangia poculata microbiome is reflected across different sequencing methodologies
Comparison of microbiomes of cold-water corals Primnoa pacifica and Primnoa resedaeformis, with possible link between microbiome composition and host genotype
USGS microbiome research
Predation by Acanthurus leucopareius on black-band disease in Kauai, Hawaii
Biogeographic comparison of Lophelia-associated bacterial communities in the Western Atlantic reveals conserved core microbiome
Bacterial community diversity of the deep-sea octocoral Paramuricea placomus
Coral-associated bacterial diversity is conserved across two deep-sea Anthothela species
Seasonal microbial and environmental parameters at Crocker Reef, Florida Keys, 2014–2015
Comparing bacterial community composition of healthy and dark spot-affected Siderastrea siderea in Florida and the Caribbean
Comparing bacterial community composition between healthy and white plague-like disease states in Orbicella annularis using PhyloChip™ G3 microarrays
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- Overview
The coral microbial ecology group has an active research program identifying and characterizing the microbial associates of both tropical and cold-water (deep-sea) corals and their surrounding habitat. Current projects focus on coral disease dynamics, bacterial diversity, and using metagenomics to elucidate the functional roles of coral microbes.
Close-up image of the cold-water coral Lophelia pertusa, with polyps extended. The coral polyps eat by grabbing tiny suspended particulates (visible against the dark water background). The bright orange claws of a squat lobster (Eumunida picta) can be seen peeking out from behind the coral branches. (Public domain.) Coral microbial ecology
Coral microbial ecology is the study of the relationship of coral-associated microorganisms to each other, the coral host, and to their environment. Just as we humans have beneficial bacteria living on our skin and in our intestines, corals also have co-habitating non-pathogenic (not disease-causing) microbes. These microbes include bacteria, archaea, and fungi—representing all three of the major domains of life.
What can we learn from studying coral microbial ecology? Why is it important? Coral reefs in the Caribbean have been in decline for several decades. One of the most visible causes is disease. Coral diseases are not well understood, but the few that have been characterized are all caused by microorganisms. In order to understand the diseased state, we must first understand the healthy state. Until now, coral biology studies have been limited to studies of the coral animal, the algal symbiont, or the interactions of the two. Coral microbial-ecology studies contribute a missing piece of information to the study of overall coral biology. It has been speculated that coral-associated bacteria benefit the coral by fixing nitrogen, breaking down waste products, and cycling basic nutrients back to the photosynthetic algal symbionts (zooxanthellae). Bacteria may also ward off other potentially harmful microbes by producing antibiotics or by just occupying the available space.
The coral microbial ecology group has an active research program identifying and characterizing the microbial associates of both tropical and cold-water (deep-sea) corals and their surrounding habitat. Current projects focus on coral disease dynamics, bacterial diversity, and using metagenomics to elucidate the functional roles of coral microbes.
- Science
Below are other science projects associated with this project.
DISCOVRE - Diversity, Systematics and Connectivity of Vulnerable Reef Ecosystems Project
This project uses amplicon sequencing, and functional microarrays to examine the microbiomes of several deep-sea coral species, with priority given to species that are also of interest to the population genetics group: Desmophyllum dianthus, Lophelia pertusa, Enallopsammia sp., and Acanthogorgia sp. The project also uses metagenomics to survey benthic habitats including coral mounds, cold seeps...Microbial Processes on Reefs
The microbial community on coral reefs is generally underappreciated given the ubiquity, abundance, complexity, and formative role these prokaryotes serve in the metabolic and chemical processes on reefs. We use microbiological and metagenomic techniques to decipher the roles the microbial community are playing in processes such as coral disease, submarine groundwater discharge, calcification, and...Coral Disease
We investigated coral disease processes and causes by characterizing microbial communities in diseased and healthy representatives of selected coral species both temporally and spatially by employing microarray technology. We tested the diagnostic potential of coral fluorescence for identifying disease-induced physiological stress. - Data
Below are data sets associated with this project.
Cold-water Coral Microbiomes (Primnoa spp.) from Gulf of Alaska, Baltimore Canyon, and Norfolk Canyon: Raw Data
The files in this data release are the raw DNA sequence files referenced in the journal article by Goldsmith and others (2018) entitled "Comparison of microbiomes of cold-water corals Primnoa pacifica and Primnoa resedaeformis, with possible link between microbiome composition and host genotype." They represent a 16S rRNA gene amplicon survey of the corals' microbiomes (Primnoa spp.) completed usi - Multimedia
Below are multimedia items associated with this project.
- Publications
Below are publications associated with this project.
Filter Total Items: 18Microbiomes of stony and soft deep-sea corals share rare core bacteria
Background: Numerous studies have shown that bacteria form stable associations with host corals and have focused on identifying conserved “core microbiomes” of bacterial associates inferred to be serving key roles in the coral holobiont. Because studies tend to focus on only stony corals (order Scleractinia) or soft corals (order Alcyonacea), it is currently unknown if there are conserved bacteriaAuthorsChristina A. KelloggMicrobial associations of four species of algal symbiont-bearing Foraminifers from the Florida Reef Tract, USA
While microbiome research is a rapidly expanding field of study, relatively little is known of the microbiomes associated with Foraminifera. This preliminary study investigated microbes associated with four species of Foraminifera, representing two taxonomic orders, which host three kinds of algal endosymbionts. A major objective was to explore potential influences on the microbiome composition, iAuthorsMakenna M. Martin, Christina A. Kellogg, Pamela HallockStability of temperate coral Astrangia poculata microbiome is reflected across different sequencing methodologies
The microbiome of the temperate coral Astrangia poculata was first described in 2017 using next-generation Illumina sequencing to examine the coral’s bacterial and archaeal associates across seasons and among hosts of differing symbiotic status. To assess the impact of methodology on the detectable diversity of the coral’s microbiome, we obtained near full-length Sanger sequences from clone librarAuthorsDawn B. Goldsmith, Zoe A. Pratte, Christina A. Kellogg, Sara E. Snader, Koty H. SharpComparison of microbiomes of cold-water corals Primnoa pacifica and Primnoa resedaeformis, with possible link between microbiome composition and host genotype
Cold-water corals provide critical habitats for a multitude of marine species, but are understudied relative to tropical corals. Primnoa pacifica is a cold-water coral prevalent throughout Alaskan waters, while another species in the genus, Primnoa resedaeformis, is widely distributed in the Atlantic Ocean. This study examined the V4-V5 region of the 16S rRNA gene after amplifying and pyrosequenciAuthorsDawn B. Goldsmith, Christina A. Kellogg, Cheryl L. Morrison, Michael A. Gray, Robert P. Stone, Rhian G. Waller, Sandra D. Brooke, Steve W. RossUSGS microbiome research
Microbiomes are the communities of microorganisms (for example, bacteria, viruses, and fungi) that live on, in, and around people, plants, animals, soil, water, and the atmosphere. Microbiomes are active in the functioning of diverse ecosystems, for instance, by influencing water quality, nutrient acquisition and stress tolerance in plants, and stability of soil and aquatic environments. MicrobioAuthorsChristina A. Kellogg, M. Camille HopkinsPredation by Acanthurus leucopareius on black-band disease in Kauai, Hawaii
No abstract available.AuthorsChristina A. Kellogg, Amy West, Christina M. RunyonBiogeographic comparison of Lophelia-associated bacterial communities in the Western Atlantic reveals conserved core microbiome
Over the last decade, publications on deep-sea corals have tripled. Most attention has been paid to Lophelia pertusa, a globally distributed scleractinian coral that creates critical three-dimensional habitat in the deep ocean. The bacterial community associated with L. pertusa has been previously described by a number of studies at sites in the Mediterranean Sea, Norwegian fjords, off Great BritaAuthorsChristina A. Kellogg, Dawn B. Goldsmith, Michael A. GrayBacterial community diversity of the deep-sea octocoral Paramuricea placomus
Compared to tropical corals, much less is known about deep-sea coral biology and ecology. Although the microbial communities of some deep-sea corals have been described, this is the first study to characterize the bacterial community associated with the deep-sea octocoral, Paramuricea placomus. Samples from five colonies of P. placomus were collected from Baltimore Canyon (379–382 m depth) in theAuthorsChristina A. Kellogg, Steve W. Ross, Sandra D. BrookeCoral-associated bacterial diversity is conserved across two deep-sea Anthothela species
Cold-water corals, similar to tropical corals, contain diverse and complex microbial assemblages. These bacteria provide essential biological functions within coral holobionts, facilitating increased nutrient utilization and production of antimicrobial compounds. To date, few cold-water octocoral species have been analyzed to explore the diversity and abundance of their microbial associates. For tAuthorsStephanie N. Lawler, Christina A. Kellogg, Scott C France, Rachel W Clostio, Sandra D. Brooke, Steve W. RossSeasonal microbial and environmental parameters at Crocker Reef, Florida Keys, 2014–2015
Crocker Reef, located on the outer reef tract of the Florida Keys (fig. 1), was the site of an integrated “reefscape characterization” effort focused on calcification and related biogeochemical processes as part of the U.S. Geological Survey (USGS) Coral Reef Ecosystem STudies (CREST) project. It is characterized as a senile or dead reef, with only scattered stony coral colonies and areas of sandAuthorsChristina A. Kellogg, Kimberly K. Yates, Stephanie N. Lawler, Christopher S. Moore, Nathan A. SmileyComparing bacterial community composition of healthy and dark spot-affected Siderastrea siderea in Florida and the Caribbean
Coral disease is one of the major causes of reef degradation. Dark Spot Syndrome (DSS) was described in the early 1990's as brown or purple amorphous areas of tissue on a coral and has since become one of the most prevalent diseases reported on Caribbean reefs. It has been identified in a number of coral species, but there is debate as to whether it is in fact the same disease in different corals.AuthorsChristina A. Kellogg, Yvette M. Piceno, Lauren M. Tom, Todd Z. DeSantis, Michael A. Gray, Gary L. AndersenComparing bacterial community composition between healthy and white plague-like disease states in Orbicella annularis using PhyloChip™ G3 microarrays
Coral disease is a global problem. Diseases are typically named or described based on macroscopic changes, but broad signs of coral distress such as tissue loss or discoloration are unlikely to be specific to a particular pathogen. For example, there appear to be multiple diseases that manifest the rapid tissue loss that characterizes ‘white plague.’ PhyloChip™ G3 microarrays were used to compareAuthorsChristina A. Kellogg, Yvette M. Piceno, Lauren M. Tom, Todd Z. DeSantis, Michael A. Gray, David G. Zawada, Gary L. Andersen - News
Below are news stories associated with this project.