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!
Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)
The disappearance of common species
01.02.2018 | Technical University of Munich (TUM)
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
Let’s say the armrest is broken in your vintage car. As things stand, you would need a lot of luck and persistence to find the right spare part. But in the world of Industrie 4.0 and production with batch sizes of one, you can simply scan the armrest and print it out. This is made possible by the first ever 3D scanner capable of working autonomously and in real time. The autonomous scanning system will be on display at the Hannover Messe Preview on February 6 and at the Hannover Messe proper from April 23 to 27, 2018 (Hall 6, Booth A30).
Part of the charm of vintage cars is that they stopped making them long ago, so it is special when you do see one out on the roads. If something breaks or...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
16.02.2018 | Information Technology
16.02.2018 | Health and Medicine
16.02.2018 | Physics and Astronomy