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https://www.readbyqxmd.com/read/28527001/the-relative-abundance-of-dimethylsulfoniopropionate-dmsp-among-other-zwitterions-in-branching-coral-at-heron-island-southern-great-barrier-reef
#1
Hilton B Swan, Elisabeth S M Deschaseaux, Graham B Jones, Bradley D Eyre
Dimethylsulfoniopropionate (DMSP) and eleven other target zwitterions were quantified in the branch tips of six Acropora species and Stylophora pistillata hard coral growing on the reef flat surrounding Heron Island in the southern Great Barrier Reef (GBR), Australia. Hydrophilic interaction liquid chromatography mass spectrometry (HILIC-MS) was used for sample analysis with isotope dilution MS applied to quantify DMSP. The concentration of DMSP was ten times greater in A. aspera than A. valida, with this difference being maintained throughout the spring, summer and winter seasons...
May 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28526853/response-of-coral-calcification-and-calcifying-fluid-composition-to-thermally-induced-bleaching-stress
#2
J P D'Olivo, M T McCulloch
Severe, global-scale thermal stress events like those of 1998 and 2016, are becoming more frequent and intense, potentially compromising the future of coral reefs. Here we report the effects of the 1998 bleaching event on coral calcification as well as the composition of the calcifying fluid (cf) from which corals precipitate their calcium carbonate skeletons. This was investigated by using the Sr/Ca, Li/Mg (temperature), and boron isotopes (δ(11)B) and B/Ca (carbonate chemistry) proxies in a Porites sp. coral...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526200/nickel-and-ocean-warming-affect-scleractinian-coral-growth
#3
T Biscéré, A Lorrain, R Rodolfo-Metalpa, A Gilbert, A Wright, C Devissi, C Peignon, R Farman, E Duvieilbourg, C Payri, F Houlbrèque
The sensitivity of corals and their Symbiodinium to warming has been extensively documented; however very few studies considered that anthropogenic inputs such as metal pollution have already an impact on many fringing reefs. Thus, today, nickel releases are common in coastal ecosystems. In this study, two major reef-building species Acropora muricata and Pocillopora damicornis were exposed in situ to ambient and moderate nickel concentrations on a short-term period (1h) using benthic chamber experiments. Simultaneously, we tested in laboratory conditions the combined effects of a chronic exposure (8weeks) to moderate nickel concentrations and ocean warming on A...
May 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28526119/effects-of-temperature-salinity-and-composition-of-the-dinoflagellate-assemblage-on-the-growth-of-gambierdiscus-carpenteri-isolated-from-the-great-barrier-reef
#4
Leanne Sparrow, Paolo Momigliano, Garry R Russ, Kirsten Heimann
Increases in reported incidence of ciguatera fish poisoning (hereafter ciguatera) have been linked to warmer sea temperatures that are known to trigger coral bleaching events. The drivers that trigger blooms of ciguatera-causing dinoflagellates on the Great Barrier Reef (GBR) are poorly understood. This study investigated the effects of increased temperatures and lowered salinities, often associated with environmental disturbance events, on the population growth of two strains of the potentially ciguatera-causing dinoflagellate, Gambierdiscus carpenteri (NQAIF116 and NQAIF380)...
May 2017: Harmful Algae
https://www.readbyqxmd.com/read/28526118/effects-of-elevated-nutrients-and-co2-emission-scenarios-on-three-coral-reef-macroalgae
#5
Dorothea Bender-Champ, Guillermo Diaz-Pulido, Sophie Dove
Coral reef macroalgae are expected to thrive in the future under conditions that are deleterious to the health of reef-building corals. Here we examined how macroalgae would be affected by exposure to future CO2 emission scenarios (pCO2 and temperature), enriched nutrients and combinations of both. The species tested, Laurencia intricata (Rhodophyta), Turbinaria ornata and Chnoospora implexa (both Phaeophyceae), have active carbon-concentrating mechanisms but responded differently to the treatments. L. intricata showed high mortality under nutrient enriched RCP4...
May 2017: Harmful Algae
https://www.readbyqxmd.com/read/28522534/21st-century-rise-in-anthropogenic-nitrogen-deposition-on-a-remote-coral-reef
#6
Haojia Ren, Yi-Chi Chen, Xingchen T Wang, George T F Wong, Anne L Cohen, Thomas M DeCarlo, Mira A Weigand, Horng-Sheng Mii, Daniel M Sigman
With the rapid rise in pollution-associated nitrogen inputs to the western Pacific, it has been suggested that even the open ocean has been affected. In a coral core from Dongsha Atoll, a remote coral reef ecosystem, we observe a decline in the (15)N/(14)N of coral skeleton-bound organic matter, which signals increased deposition of anthropogenic atmospheric N on the open ocean and its incorporation into plankton and, in turn, the atoll corals. The first clear change occurred just before 2000 CE, decades later than predicted by other work...
May 19, 2017: Science
https://www.readbyqxmd.com/read/28515171/mutualistic-damselfish-induce-higher-photosynthetic-rates-in-their-host-coral
#7
Nur Garcia-Herrera, Sebastian C A Ferse, Andreas Kunzmann, Amatzia Genin
Coral reefs are amongst the most diverse ecosystems on Earth where complex inter-specific interactions are ubiquitous. An example of such interactions is the mutualistic relationship between damselfishes and branching corals in the Northern Red Sea, where the fish use corals as shelter and provide them with nutrients, enhance the flow between their branches, and protect them from predators. By enhancing the flow between the coral branches, the fish ventilate the coral's inner zone, mitigating hypoxic conditions that otherwise develop within that zone during the night...
May 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28513777/population-dynamics-of-siderastrea-stellata-verrill-1868-from-rocas-atoll-rn-implications-for-predicted-climate-change-impacts-at-the-only-south-atlantic-atoll
#8
Barbara R Pinheiro, Natan S Pereira, Paula G F Agostinho, Manuel J F Montes
Coral reefs are one of the most vulnerable ecosystems to ocean warming and acidification, and it is important to determine the role of reef building species in this environment in order to obtain insight into their susceptibility to expected impacts of global changes. Aspects of the life history of a coral population, such as reproduction, growth and size-frequency can contribute to the production of models that are used to estimate impacts and potential recovery of the population, acting as a powerful tool for the conservation and management of those ecosystems...
May 15, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28510601/reproductive-biology-of-the-deep-brooding-coral-seriatopora-hystrix-implications-for-shallow-reef-recovery
#9
Rian Prasetia, Frederic Sinniger, Kaito Hashizume, Saki Harii
Mesophotic coral ecosystems (MCEs, between 30 and 150 m depth) are hypothesized to contribute to the recovery of degraded shallow reefs through sexually produced larvae (referred to as Deep Reef Refuge Hypothesis). In Okinawa, Japan, the brooder coral Seriatopora hystrix was reported to be locally extinct in a shallow reef while it was found abundant at a MCE nearby. In this context, S. hystrix represents a key model to test the Deep Reef Refuge Hypothesis and to understand the potential contribution of mesophotic corals to shallow coral reef recovery...
2017: PloS One
https://www.readbyqxmd.com/read/28509908/microbial-contributions-to-the-persistence-of-coral-reefs
#10
Nicole S Webster, Thorsten B H Reusch
On contemplating the adaptive capacity of reef organisms to a rapidly changing environment, the microbiome offers significant and greatly unrecognised potential. Microbial symbionts contribute to the physiology, development, immunity and behaviour of their hosts, and can respond very rapidly to changing environmental conditions, providing a powerful mechanism for acclimatisation and also possibly rapid evolution of coral reef holobionts. Environmentally acquired fluctuations in the microbiome can have significant functional consequences for the holobiont phenotype upon which selection can act...
May 16, 2017: ISME Journal
https://www.readbyqxmd.com/read/28502453/petroleum-hydrocarbon-toxicity-to-corals-a-review
#11
REVIEW
Nicholas R Turner, D Abigail Renegar
The proximity of coral reefs to coastal urban areas and shipping lanes predisposes corals to petroleum pollution from multiple sources. Previous research has evaluated petroleum toxicity to coral using a variety of methodology, including monitoring effects of acute and chronic spills, in situ exposures, and ex situ exposures with both adult and larval stage corals. Variability in toxicant, bioassay conditions, species and other methodological disparities between studies prevents comprehensive conclusions regarding the toxicity of hydrocarbons to corals...
May 10, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28489903/atoll-scale-patterns-in-coral-reef-community-structure-human-signatures-on-ulithi-atoll-micronesia
#12
Nicole L Crane, Peter Nelson, Avigdor Abelson, Kristin Precoda, John Rulmal, Giacomo Bernardi, Michelle Paddack
The dynamic relationship between reefs and the people who utilize them at a subsistence level is poorly understood. This paper characterizes atoll-scale patterns in shallow coral reef habitat and fish community structure, and correlates these with environmental characteristics and anthropogenic factors, critical to conservation efforts for the reefs and the people who depend on them. Hierarchical clustering analyses by site for benthic composition and fish community resulted in the same 3 major clusters: cluster 1-oceanic (close proximity to deep water) and uninhabited (low human impact); cluster 2-oceanic and inhabited (high human impact); and cluster 3-lagoonal (facing the inside of the lagoon) and inhabited (highest human impact)...
2017: PloS One
https://www.readbyqxmd.com/read/28486655/microbial-processes-driving-coral-reef-organic-carbon-flow
#13
Cynthia B Silveira, Giselle S Cavalcanti, Juline M Walter, Arthur W Silva-Lima, Elizabeth A Dinsdale, David G Bourne, Cristiane C Thompson, Fabiano L Thompson
Coral reefs are one of the most productive ecosystems on the planet, with primary production rates compared to that of rain forests. Benthic organisms release 10-50% of their gross organic production as mucus that stimulates heterotrophic microbial metabolism in the water column. As a result, coral reef microbes grow up to 50 times faster than open ocean communities. Anthropogenic disturbances cause once coral-dominated reefs to become dominated by fleshy organisms, with several outcomes for trophic relationships...
May 9, 2017: FEMS Microbiology Reviews
https://www.readbyqxmd.com/read/28485822/delayed-coral-recovery-in-a-warming-ocean
#14
Kate Osborne, Angus A Thompson, Alistair J Cheal, Michael J Emslie, Kerryn A Johns, Michelle J Jonker, Murray Logan, Ian R Miller, Hugh P A Sweatman
Climate change threatens coral reefs across the world. Intense bleaching has caused dramatic coral mortality in many tropical regions in recent decades, but less obvious chronic effects of temperature and other stressors can be equally threatening to the long-term persistence of diverse coral-dominated reef systems. Coral reefs persist if coral recovery rates equal or exceed average rates of mortality. While mortality from acute destructive events is often obvious and easy to measure, estimating recovery rates and investigating the factors that influence them requires long-term commitment...
May 9, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28484828/satellite-remote-sensing-for-coastal-management-a-review-of-successful-applications
#15
Matthew J McCarthy, Kaitlyn E Colna, Mahmoud M El-Mezayen, Abdiel E Laureano-Rosario, Pablo Méndez-Lázaro, Daniel B Otis, Gerardo Toro-Farmer, Maria Vega-Rodriguez, Frank E Muller-Karger
Management of coastal and marine natural resources presents a number of challenges as a growing global population and a changing climate require us to find better strategies to conserve the resources on which our health, economy, and overall well-being depend. To evaluate the status and trends in changing coastal resources over larger areas, managers in government agencies and private stakeholders around the world have increasingly turned to remote sensing technologies. A surge in collaborative and innovative efforts between resource managers, academic researchers, and industry partners is becoming increasingly vital to keep pace with evolving changes of our natural resources...
May 8, 2017: Environmental Management
https://www.readbyqxmd.com/read/28484634/comparative-behavioural-observations-demonstrate-the-cleaner-shrimp-periclimenes-yucatanicus-engages-in-true-symbiotic-cleaning-interactions
#16
Benjamin M Titus, Clayton Vondriska, Marymegan Daly
Cleaner shrimps are ecologically important members of coral reef communities, but for many species, cleaner status (i.e. dedicated, facultative and mimic), clientele and ecological role remain unverified or described. On Caribbean coral reefs, the spotted 'cleaner' shrimp Periclimenes yucatanicus forms symbioses with sea anemones that may serve as cleaning stations for reef fishes. The status of this species as a cleaner is ambiguous: only a single in situ cleaning interaction has been reported, and in the only test of its efficacy as a cleaner, it did not effectively reduce parasite loads from surgeonfish...
April 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28483611/extra-anatomic-revascularization-of-extensive-coral-reef-aorta
#17
Andrea Gaggiano, Holta Kasemi, Andrea Monti, Antonella Laurito, Mauro Maselli, Paola Manzo, Simone Quaglino, Valeria Tavolini
BACKGROUND: Coral reef aorta (CRA) is a rare, potential lethal disease of the visceral aorta as it can cause visceral and renal infarction. Various surgical approaches have been proposed for the CRA treatment. The purpose of this paper is to report different extensive extra-anatomic CRA treatment modalities tailored on the patients' clinical and anatomic presentation. METHODS: From April 2006 to October 2012, four symptomatic patients with extensive CRA were treated at our Department...
May 5, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28483141/life-and-death-of-a-sewage-treatment-plant-recorded-in-a-coral-skeleton-%C3%AE-15-n-record
#18
Nicolas N Duprey, Xingchen T Wang, Philip D Thompson, Jeffrey E Pleadwell, Laurie J Raymundo, Kiho Kim, Daniel M Sigman, David M Baker
We investigated the potential of coral skeleton δ(15)N (CS-δ(15)N) records for tracking anthropogenic-N sources in coral reef ecosystems. We produced a 56yr-long CS-δ(15)N record (1958-2014) from a reef flat in Guam that has been exposed to varying 1) levels of sewage treatment 2) population density, and 3) land use. Increasing population density (from <30 to 300ind·km(-2)) and land use changes in the watershed resulted in a ~1‰ enrichment of the CS-δ(15)N record until a sewage treatment plant (STP) started operation in 1975...
May 5, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28480135/porites-superfusa-mortality-and-recovery-from-a-bleaching-event-at-palmyra-atoll-usa
#19
Kathryn Anne Furby, Jennifer Ellen Smith, Stuart Adrian Sandin
BACKGROUND: The demography of a coral colony is not a binary trajectory of life and death. Based on the flexibility afforded by colonial organization, most reef-building corals employ a variety of dynamic survival strategies, including growth and shrinkage. The demographic flexibility affects coral size, shape and reproductive output, among other factors. It is thus critical to quantify the relative importance of key dynamics of recruitment, mortality, growth and shrinkage in changing the overall cover of coral on a reef...
2017: PeerJ
https://www.readbyqxmd.com/read/28477434/genomic-analysis-of-a-cardinalfish-with-larval-homing-potential-reveals-genetic-admixture-in-the-okinawa-islands
#20
A L Gould, P V Dunlap
Discrepancies between potential and observed dispersal distances of reef fish indicate the need for a better understanding of the influence of larval behavior on recruitment and dispersal. Population genetic studies can reveal the degree to which populations are connected, providing insight on these patterns, and the development of restriction site associated sequencing (RAD-Seq) methods has made the study of non-model organisms more accessible. We applied double digest RAD-Seq methods to test for population differentiation in the coral reef-dwelling cardinalfish, Siphamia tubifer, which based on behavioral studies, have the potential to use navigational cues to return to natal reefs...
May 6, 2017: Molecular Ecology
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