Navigation Links
Deep-reef coral hates the light, prefers the shade
Date:10/16/2011

Coral reefs are among the most diverse ecosystems on the planet, second only to tropical rain forests. Bird's nest coral (Seriatopora hystrix) is common throughout the Indo-Pacific and is able to live across a range of depths. However, there is little gene flow between the coral populations at each depth and even the algal endosymbionts (Symbiodinium), which provide energy for the corals to survive, are genetically different across habitats. New research published in BioMed Central's open access journal BMC Evolutionary Biology used genetic and photosynthetic analyses to demonstrate that these genetic differences reflect adaptations to the different environmental conditions encountered at different depths.

A team of researchers from the ARC Centre of Excellence for Coral Reef Studies and The University of Queensland looked at coral populations from three habitats on coral reefs: the sheltered back reef (Back Reef), the wave-exposed top of the reef slope (Upper Slope) and the dimly lit deeps (Deep Slope). Despite the fact that corals in the Deep Slope habitat only receive a fraction of the light available in shallow habitats (about 10 times less), the coral S. hystrix was found to be far more abundant at these depths and was also observed to grow faster. Transplantation of coral fragments to different habitats did not alter the algae-host symbiosis. Dr. Sophie Dove explained, "The corals we looked at exhibited distinct physiological strategies - while normally corals are dependent on light for their energy requirements, the deep corals, appeared to have adapted to low light conditions by having an increased capacity to exploit nutrients and plankton."

Dr Pim Bongaerts, lead author of the paper, continued, "The different selective pressures across reef environments pose an ecological barrier to migration and further promote genetic divergence of these coral populations by limiting the extent of interbreeding. This case study of S. hystrix clearly shows how ecological processes of selection can play an important role in the diversification of corals."


'/>"/>
Contact: Dr Hilary Glover
hilary.glover@biomedcentral.com
44-020-319-22370
BioMed Central
Source:Eurekalert

Related biology news :

1. Modest CO2 cutbacks may be too little, too late for coral reefs
2. Diversity of plant-eating fishes may be key to recovery of coral reefs
3. Rare corals breed their way out of trouble
4. Cold water corals conference to be held in Woods Hole
5. Coral reefs found growing in cold, deep ocean
6. Light pollution offers new global measure of coral reef health
7. Time running out on coral reefs as climate change becomes increasing threat
8. First-ever socioeconomic study on coral reefs points to challenges of coastal resource management
9. 4 years after tsunami: Corals stage comeback
10. Large sponges may be reattached to coral reefs
11. Study says middle class coral reef fish feel the economic squeeze
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/7/2016)... 2016  Syngrafii Inc. and San Antonio Credit ... includes integrating Syngrafii,s patented LongPen™ eSignature "Wet" solution ... will result in greater convenience for SACU members ... maintaining existing document workflow and compliance requirements. ... Highlights: ...
(Date:6/2/2016)... -- Perimeter Surveillance & Detection Systems, Biometrics ... Support & Other Service  The latest report ... analysis of the global Border Security market . ... $17.98 billion in 2016. Now: In November ... software and hardware technologies for advanced video surveillance. ...
(Date:5/16/2016)... NEW YORK , May 16, 2016   ... authentication solutions, today announced the opening of an IoT ... to strengthen and expand the development of embedded ... provides an unprecedented level of convenience and security with ... to authenticate one,s identity aside from DNA. EyeLock,s platform ...
Breaking Biology News(10 mins):
(Date:6/27/2016)...   Ginkgo Bioworks , a leading organism ... today awarded as one of the World Economic ... most innovative companies. Ginkgo Bioworks is engineering biology ... world in the nutrition, health and consumer goods ... customers including Fortune 500 companies to design microbes ...
(Date:6/24/2016)... ... June 24, 2016 , ... While the majority of commercial spectrophotometers ... 5000 and the 6000i models are higher end machines that use the more unconventional ... spectrophotometer’s light beam from the bottom of the cuvette holder. , FireflySci has ...
(Date:6/23/2016)... ... June 23, 2016 , ... UAS LifeSciences, one of the ... brand, UP4™ Probiotics, into Target stores nationwide. The company, which has been manufacturing ... to its list of well-respected retailers. This list includes such fine stores as ...
(Date:6/23/2016)... SPRING, Md. , June 23, 2016 A ... collected from the crime scene to track the criminal down. ... and the U.S. Food and Drug Administration (FDA) uses DNA ... Sound far-fetched? It,s not. The ... genome sequencing to support investigations of foodborne illnesses. Put as ...
Breaking Biology Technology: