Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Fertile corals discovered in deeper waters off US Virgin Islands

22.07.2015

Researchers find reproductive refuge for threatened coral species

Researchers discovered a threatened coral species that lives in deeper waters off the U.S. Virgin Islands is more fertile than its shallow-water counterparts. The new study showed that mountainous star corals (Orbicella faveolata) located at nearly 140 feet (43 meters) deep may produce one trillion more eggs per square kilometer (247 acres) than those on shallow reefs.


Diverse and vibrant deep coral reefs of the Grammanik Bank, St. Thomas, US Virgin Islands are shown. The dominant corals are boulder star corals (Orbicella franksi). The two groupers are yellowfin groupers (Mycteroperca venenosa).

Credit: Tyler B Smith - April 22, 2012

The findings from scientists at the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science and the University of the Virgin Islands have important implications for the future of coral reefs worldwide.

Caribbean coral reefs have declined 50 percent in the past 50 years, according to the 2014 Status and Trends of Caribbean Coral Reefs report. In 2005, coral reefs in the U.S. Virgin Islands were severely impacted by high temperatures and disease.

"Coastal pollution, storms, and warm water can stress a coral out, which is why we're looking at what's going on in deeper offshore habitats," said Daniel Holstein, a UM Rosenstiel School alumnus and current post-doctorate researcher at the University of the Virgin Islands. "These deeper habitats tend to be cooler and less strenuous for corals - and thus, coral spawning may be more spectacular."

Mountainous star corals reproduce by broadcast spawning, where corals release their eggs and sperm in the water during a highly synchronized event. The researchers used remote cameras at a field site off the island of St. Thomas and laboratory observations during broadcast spawning events to show that the mesophotic corals, which live in deeper reef waters typically between 30 -150 meters (98 - 492 feet), released their eggs in near synchrony with shallow-water corals.

"The reefs that produce more larvae are more likely to be successful in seeding the reefs with their offspring," said Claire Paris, associate professor of ocean sciences at the UM Rosenstiel School and co-author of the study. "Protecting these potent reproductive deep refuges could represent the key to the survival of coral reefs for future generations."

Mesophotic coral ecosystems are buffered from environmental disturbances due to their depth and distance from shore. These deeper coral reef ecosystems may offer reproductive refuge to neighboring shallow-water coral reefs that are in decline, according to the research team.

"These deep reefs offer a glimmer of hope," said Tyler Smith, research associate professor at the University of the Virgin Islands. "They may be an incredible resource for the U.S. Virgin Islands, and for the entire Caribbean, if they can supply consistent sources of coral larvae."

The study, titled "Fertile fathoms: Deep reproductive refugia for threatened shallow corals," was published in the July 21, 2015 issue of Nature Publishing Group's journal Scientific Reports. The co-authors include: Daniel M. Holstein and Tyler B. Smith of the University of the Virgin Islands; Claire B. Paris of the UM Rosenstiel School; and Joanna Gyory of Tulane University. The study was funded by the National Science Foundation - Virgin Islands Experimental Program, ROA #0814417 and the Black Coral Penalty Fund ROA #260225. Additional funding was provided by Natural Environmental Research Council (NERC) subcontract to Paris from Exeter University: "Climate change and habitat fragmentation in coral reef ecosystems" and NSF OCE-0928423 to Paris and historical work funded by Paris Lab. The study and supplementary video may be accessed here: http://www.nature.com/articles/srep12407

About the University of Miami's Rosenstiel School

The University of Miami is one of the largest private research institutions in the southeastern United States. The University's mission is to provide quality education, attract and retain outstanding students, support the faculty and their research, and build an endowment for University initiatives. Founded in the 1940's, the Rosenstiel School of Marine & Atmospheric Science has grown into one of the world's premier marine and atmospheric research institutions. Offering dynamic interdisciplinary academics, the Rosenstiel School is dedicated to helping communities to better understand the planet, participating in the establishment of environmental policies, and aiding in the improvement of society and quality of life. For more information, visit: http://www.rsmas.miami.edu.

Diana Udel | EurekAlert!

Further reports about: Atmospheric Caribbean Fertile coral reef coral reefs corals ecosystems reef ecosystems

More articles from Life Sciences:

nachricht Cancer diagnosis: no more needles?
25.05.2018 | Christian-Albrechts-Universität zu Kiel

nachricht Less is more? Gene switch for healthy aging found
25.05.2018 | Leibniz-Institut für Alternsforschung - Fritz-Lipmann-Institut e.V. (FLI)

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>