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!
Waste in the water – New purification techniques for healthier aquatic ecosystems
24.07.2018 | Eberhard Karls Universität Tübingen
Plenty of habitat for bears in Europe
24.07.2018 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur
What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...
The quality of materials often depends on the manufacturing process. In casting and welding, for example, the rate at which melts solidify and the resulting microstructure of the alloy is important. With metallic foams as well, it depends on exactly how the foaming process takes place. To understand these processes fully requires fast sensing capability. The fastest 3D tomographic images to date have now been achieved at the BESSY II X-ray source operated by the Helmholtz-Zentrum Berlin.
Dr. Francisco Garcia-Moreno and his team have designed a turntable that rotates ultra-stably about its axis at a constant rotational speed. This really depends...
08.08.2018 | Event News
27.07.2018 | Event News
25.07.2018 | Event News
14.08.2018 | Information Technology
14.08.2018 | Life Sciences
14.08.2018 | Life Sciences