Scientists agree that coral reefs are in an alarming global state of decline. However, determining the main cause or causes of this decline has proven a much more contentious issue. In the current edition of the Journal of Experimental Marine Biology and Ecology (JEMBE), Harbor Branch marine scientist Dr.Brian Lapointe and colleagues present new evidence they hope will help settle one major debate: whether pollution or overfishing is the main cause of the coral-smothering spread of seaweed on many reefs. The research suggests that pollution from such sources as sewage and agricultural runoff is the main culprit, a conclusion that has major repercussions for managers working to end the decline of reefs in South Florida and around the world.
Dr. Peter Barile working at the mangrove channel outflow with three experimental cage sites visible
Credit: HARBOR BRANCH/Lapointe
Dr. Brian Lapointe analyzes water quality while aboard a HARBOR BRANCH research vessel near Normans Pond Cay
Credit: HARBOR BRANCH/Barile
When seaweed, or macroalgae, spreads over coral reefs, a problem becoming increasingly common, it can smother coral and prevent important reef inhabitants such as fish and lobster from finding the food and shelter they require. The reef that remains is transformed into a dull mound with little of its original vibrant life and color. The two main explanations for such overgrowth are that nutrients in pollution fuel rapid, explosive seaweed growth, or that overfishing and other problems remove key grazers such as fish or sea urchins that would normally feed on the seaweed, keeping its growth and spread in check.
"The reason this issue is so important is that were losing our coral reefs at a very accelerated rate," says Lapointe. "These systems are basically in catastrophic decline in many parts of the globe, and South Florida is probably losing coral even faster than other parts of the world. This research, I believe, makes it clear that one of the key problems is pollution from land-based sources."
Mark Schrope | EurekAlert!
Preservation of floodplains is flood protection
27.09.2017 | Technische Universität München
Conservationists are sounding the alarm: parrots much more threatened than assumed
15.09.2017 | Justus-Liebig-Universität Gießen
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
20.10.2017 | Interdisciplinary Research
20.10.2017 | Materials Sciences
20.10.2017 | Earth Sciences