keyword
MENU ▼
Read by QxMD icon Read
search

Coral Reefs

keyword
https://www.readbyqxmd.com/read/28211848/host-specificity-of-symbiodinium-variants-revealed-by-an-its2-metahaplotype-approach
#1
Edward G Smith, Remi N Ketchum, John A Burt
Analysis of the widely used ITS region is confounded by the presence of intragenomic variants (IGVs). In Symbiodinium, the algal symbionts of reef building corals, deep-sequencing analyses are used to characterise communities within corals, yet these analyses largely overlook IGVs. Here we consider that distinct ITS2 sequences could represent IGVs rather than distinct symbiont types and argue that symbionts can be distinguished by their proportional composition of IGVs, described as their ITS2 metahaplotype...
February 17, 2017: ISME Journal
https://www.readbyqxmd.com/read/28209895/seagrass-ecosystems-reduce-exposure-to-bacterial-pathogens-of-humans-fishes-and-invertebrates
#2
Joleah B Lamb, Jeroen A J M van de Water, David G Bourne, Craig Altier, Margaux Y Hein, Evan A Fiorenza, Nur Abu, Jamaluddin Jompa, C Drew Harvell
Plants are important in urban environments for removing pathogens and improving water quality. Seagrass meadows are the most widespread coastal ecosystem on the planet. Although these plants are known to be associated with natural biocide production, they have not been evaluated for their ability to remove microbiological contamination. Using amplicon sequencing of the 16S ribosomal RNA gene, we found that when seagrass meadows are present, there was a 50% reduction in the relative abundance of potential bacterial pathogens capable of causing disease in humans and marine organisms...
February 17, 2017: Science
https://www.readbyqxmd.com/read/28199351/physiological-plasticity-related-to-zonation-affects-hsp70-expression-in-the-reef-building-coral-pocillopora-verrucosa
#3
Davide Poli, Elena Fabbri, Stefano Goffredo, Valentina Airi, Silvia Franzellitti
This study investigates for the first time the transcriptional regulation of a stress-inducible 70-kDa heat shock protein (hsp70) in the scleractinian coral Pocillopora verrucosa sampled at three locations and two depths (3 m and 12 m) in Bangka Island waters (North Sulawesi, Indonesia). Percentage of coral cover indicated reduced habitat suitability with depth and at the Tanjung Husi (TA) site, which also displayed relatively higher seawater temperatures. Expression of the P. verrucosa hsp70 transcript evaluated under field conditions followed a depth-related profile, with relatively higher expression levels in 3-m collected nubbins compared to the 12-m ones...
2017: PloS One
https://www.readbyqxmd.com/read/28199341/methods-for-calculating-protection-equality-for-conservation-planning
#4
Alienor L M Chauvenet, Caitlin D Kuempel, Jennifer McGowan, Maria Beger, Hugh P Possingham
Protected Areas (PAs) are a central part of biodiversity conservation strategies around the world. Today, PAs cover c15% of the Earth's land mass and c3% of the global oceans. These numbers are expected to grow rapidly to meet the Convention on Biological Diversity's Aichi Biodiversity target 11, which aims to see 17% and 10% of terrestrial and marine biomes protected, respectively, by 2020. This target also requires countries to ensure that PAs protect an "ecologically representative" sample of their biodiversity...
2017: PloS One
https://www.readbyqxmd.com/read/28196651/trace-element-concentrations-in-reef-associated-sediments-of-koswari-island-gulf-of-mannar-biosphere-reserve-southeast-coast-of-india
#5
S Krishnakumar, S Ramasamy, N Chandrasekar, T Simon Peter, V Gopal, Prince S Godson, N S Magesh
Extensive field work was conducted in order to assess the sediment pollution level and potential ecological risk on coral reef ecosystem. Thirty three surface sample was collected using grid sampling technique. The calcium carbonate and organic matter were primarily controlled by the distribution of coral rubbles and seagrass meadows. The concentration of trace elements is higher than the crustal average in few locations and the same result was derived from index calculations. However, the significant concentration of lead was observed throughout the study area...
February 11, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28196275/symbiodinium-dinophyceae-community-patterns-in-invertebrate-hosts-from-inshore-marginal-reefs-of-the-southern-great-barrier-reef-australia
#6
Linda Tonk, Eugenia M Sampayo, Aaron Chai, Verena Schrameyer, Ove Hoegh-Guldberg
The broad range in physiological variation displayed by Symbiodinium spp. has proven imperative during periods of environmental change and contribute to the survival of their coral host. Characterizing how host and Symbiodinium community assemblages differ across environmentally distinct habitats provides useful information to predict how corals will respond to major environmental change. Despite the extensive characterizations of Symbiodinium diversity found amongst reef cnidarians on the Great Barrier Reef substantial biogeographic gaps exist, especially across inshore habitats...
February 14, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28195203/reproductive-strategies-of-the-coral-turbinaria-reniformis-in-the-northern-gulf-of-aqaba-red-sea
#7
Hanna Rapuano, Itzchak Brickner, Tom Shlesinger, Efrat Meroz-Fine, Raz Tamir, Yossi Loya
Here we describe for the first time the reproductive biology of the scleractinian coral Turbinaria reniformis studied during three years at the coral reefs of Eilat and Aqaba. We also investigated the possibility of sex change in individually tagged colonies followed over a period of 12 years. T. reniformis was found to be a stable gonochorist (no detected sex change) that reproduces by broadcast spawning 5-6 nights after the full moon of June and July. Spawning was highly synchronized between individuals in the field and in the lab...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28188662/population-genetics-of-reef-coral-endosymbionts-symbiodinium-dinophyceae
#8
D J Thornhill, E J Howells, D C Wham, T D Steury, S R Santos
Symbiodinium is a diverse genus of unicellular dinoflagellate symbionts associating with various marine protists and invertebrates. Although the broad-scale diversity and phylogenetics of the Symbiodinium complex is well established, there have been surprisingly few data on fine-scale population structure and biogeography of these dinoflagellates. Yet population level processes contribute strongly to the biology of Symbiodinium, including how anthropogenic-driven global climate change impacts these symbionts and their host associations...
February 11, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28187165/the-influence-of-resilience-based-management-on-coral-reef-monitoring-a-systematic-review
#9
Vivian Y Y Lam, Christopher Doropoulos, Peter J Mumby
With rapid changes taking place on coral reefs, managers and scientists are faced with prioritising interventions that might avoid undesirable losses in ecosystem health. The property of resilience captures how reefs react and respond to stressors and environmental changes. Therefore, in principle, management goals are more likely to be realised if resilience theory is used to inform decision making and help set realistic expectations for reef outcomes. Indeed, a new approach to reef management has been termed 'resilience-based management' (RBM)...
2017: PloS One
https://www.readbyqxmd.com/read/28186138/the-spectral-and-spatial-distribution-of-light-pollution-in-the-waters-of-the-northern-gulf-of-aqaba-eilat
#10
Raz Tamir, Amit Lerner, Carynelisa Haspel, Zvy Dubinsky, David Iluz
The urbanization of the shores of the Gulf of Aqaba has exposed the marine environment there, including unique fringing coral reefs, to strong anthropogenic light sources. Here we present the first in situ measurements of artificial nighttime light under water in such an ecosystem, with irradiance measured in 12 wavelength bands, at 19 measurement stations spread over 44 square km, and at 30 depths down to 30-m depth. At 1-m depth, we find downwelling irradiance values that vary from 4.6 × 10(-4) μW cm(-2) nm(-1) 500 m from the city to 1 × 10(-6) μW cm(-2) nm(-1) in the center of the gulf (9...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28186132/bacterial-community-dynamics-are-linked-to-patterns-of-coral-heat-tolerance
#11
Maren Ziegler, Francois O Seneca, Lauren K Yum, Stephen R Palumbi, Christian R Voolstra
Ocean warming threatens corals and the coral reef ecosystem. Nevertheless, corals can be adapted to their thermal environment and inherit heat tolerance across generations. In addition, the diverse microbes that associate with corals have the capacity for more rapid change, potentially aiding the adaptation of long-lived corals. Here, we show that the microbiome of reef corals is different across thermally variable habitats and changes over time when corals are reciprocally transplanted. Exposing these corals to thermal bleaching conditions changes the microbiome for heat-sensitive corals, but not for heat-tolerant corals growing in habitats with natural high heat extremes...
February 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/28182684/do-the-shuffle-changes-in-symbiodinium-consortia-throughout-juvenile-coral-development
#12
Hannah G Reich, Deborah L Robertson, Gretchen Goodbody-Gringley
Previous studies of symbiotic associations between scleractinians corals and Symbiodinium have demonstrated that the consortium of symbionts can change in response to environmental conditions. However, less is known about symbiont shuffling during early coral development, particularly in brooding species. This study examined whether Symbiodinium consortia (1) varied in Porites astreoides on shallow (10m) and upper mesophotic (30m) reefs, (2) changed during coral development, and (3) influenced growth of juveniles in different environments...
2017: PloS One
https://www.readbyqxmd.com/read/28181581/transcriptome-profiling-of-galaxea-fascicularis-and-its-endosymbiont-symbiodinium-reveals-chronic-eutrophication-tolerance-pathways-and-metabolic-mutualism-between-partners
#13
Zhenyue Lin, Mingliang Chen, Xu Dong, Xinqing Zheng, Haining Huang, Xun Xu, Jianming Chen
In the South China Sea, coastal eutrophication in the Beibu Gulf has seriously threatened reef habitats by subjecting corals to chronic physiological stress. To determine how coral holobionts may tolerate such conditions, we examined the transcriptomes of healthy colonies of the galaxy coral Galaxea fascicularis and its endosymbiont Symbiodinium from two reef sites experiencing pristine or eutrophied nutrient regimes. We identified 236 and 205 genes that were differentially expressed in eutrophied hosts and symbionts, respectively...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28178297/the-flashlight-fish-anomalops-katoptron-uses-bioluminescent-light-to-detect-prey-in-the-dark
#14
Jens Hellinger, Peter Jägers, Marcel Donner, Franziska Sutt, Melanie D Mark, Budiono Senen, Ralph Tollrian, Stefan Herlitze
Bioluminescence is a fascinating phenomenon occurring in numerous animal taxa in the ocean. The reef dwelling splitfin flashlight fish (Anomalops katoptron) can be found in large schools during moonless nights in the shallow water of coral reefs and in the open surrounding water. Anomalops katoptron produce striking blink patterns with symbiotic bacteria in their sub-ocular light organs. We examined the blink frequency in A. katoptron under various laboratory conditions. During the night A. katoptron swims in schools roughly parallel to their conspecifics and display high blink frequencies of approximately 90 blinks/minute with equal on and off times...
2017: PloS One
https://www.readbyqxmd.com/read/28174567/in-vivo-microscale-measurements-of-light-and-photosynthesis-during-coral-bleaching-evidence-for-the-optical-feedback-loop
#15
Daniel Wangpraseurt, Jacob B Holm, Anthony W D Larkum, Mathieu Pernice, Peter J Ralph, David J Suggett, Michael Kühl
Climate change-related coral bleaching, i.e., the visible loss of zooxanthellae from the coral host, is increasing in frequency and extent and presents a major threat to coral reefs globally. Coral bleaching has been proposed to involve accelerating light stress of their microalgal endosymbionts via a positive feedback loop of photodamage, symbiont expulsion and excess in vivo light exposure. To test this hypothesis, we used light and O2 microsensors to characterize in vivo light exposure and photosynthesis of Symbiodinium during a thermal stress experiment...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28168098/identifying-zooplankton-community-changes-between-shallow-and-upper-mesophotic-reefs-on-the-mesoamerican-barrier-reef-caribbean
#16
Dominic A Andradi-Brown, Catherine E I Head, Dan A Exton, Christina L Hunt, Alicia Hendrix, Erika Gress, Alex D Rogers
Mesophotic coral ecosystems (MCEs, reefs 30-150 m) are understudied, yet the limited research conducted has been biased towards large sessile taxa, such as scleractinian corals and sponges, or mobile taxa such as fishes. Here we investigate zooplankton communities on shallow reefs and MCEs around Utila on the southern Mesoamerican Barrier Reef using planktonic light traps. Zooplankton samples were sorted into broad taxonomic groups. Our results indicate similar taxonomic zooplankton richness and overall biomass between shallow reefs and MCEs...
2017: PeerJ
https://www.readbyqxmd.com/read/28166257/size-matters-predator-outbreaks-threaten-foundation-species-in-small-marine-protected-areas
#17
Cody S Clements, Mark E Hay
The unanticipated impacts of consumers in fragmented habitats are frequently a challenge for ecosystem management. On Indo-Pacific coral reefs, crown-of-thorns sea stars (Acanthaster spp.) are coral predators whose outbreaks cause precipitous coral decline. Across large spatial scales, Acanthaster densities are lower in large no-take Marine Protected Areas (MPAs) and reefs subject to limited human exploitation. However, using a combination of observational and manipulative experiments, we found that Acanthaster densities within a network of small, no-take MPAs on reef flats in Fiji were ~2-3...
2017: PloS One
https://www.readbyqxmd.com/read/28162251/reliability-and-utility-of-citizen-science-reef-monitoring-data-collected-by-reef-check-australia-2002-2015
#18
Terence Done, Chris Roelfsema, Andrew Harvey, Laura Schuller, Jocelyn Hill, Marie-Lise Schläppy, Alexandra Lea, Anne Bauer-Civiello, Jennifer Loder
Reef Check Australia (RCA) has collected data on benthic composition and cover at >70 sites along >1000km of Australia's Queensland coast from 2002 to 2015. This paper quantifies the accuracy, precision and power of RCA benthic composition data, to guide its application and interpretation. A simulation study established that the inherent accuracy of the Reef Check point sampling protocol is high (<±7% error absolute), in the range of estimates of benthic cover from 1% to 50%. A field study at three reef sites indicated that, despite minor observer- and deployment-related biases, the protocol does reliably document moderate ecological changes in coral communities...
February 2, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28162249/impacts-of-turbidity-on-corals-the-relative-importance-of-light-limitation-and-suspended-sediments
#19
Pia Bessell-Browne, Andrew P Negri, Rebecca Fisher, Peta L Clode, Alan Duckworth, Ross Jones
As part of an investigation of the effects of water quality from dredging/natural resuspension on reefs, the effects of suspended sediment concentrations (SSCs) (0, 30, 100mgL(-1)) and light (~0, 1.1, 8.6molphotonsm(-2)d(-1)) were examined alone and in combination, on the corals Acropora millepora, Montipora capricornis and Porites spp. over an extended (28d) period. No effects were observed at any sediment concentrations when applied alone. All corals in the lowest light treatments lost chlorophyll a and discoloured (bleached) after a week...
February 2, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28160340/phylogeography-of-the-sergeants-abudefduf-sexfasciatus-and-a-vaigiensis-reveals-complex-introgression-patterns-between-two-widespread-and-sympatric-indo-west-pacific-reef-fishes
#20
Joris A M Bertrand, Philippe Borsa, Wei-Jen Chen
On evolutionary time scales, sea level oscillations lead to recurrent spatio-temporal variation in species distribution and population connectivity. In this situation, applying classical concepts of biogeography is challenging yet necessary to understand the mechanisms underlying biodiversity in highly diverse marine ecosystems such as coral reefs. We aimed at studying the outcomes of such complex biogeographical dynamics on reproductive isolation by sampling populations across a wide spatial range of a species-rich fish genus: the sergeants (Pomacentridae: Abudefduf)...
February 3, 2017: Molecular Ecology
keyword
keyword
30544
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"