Search results
Results From The WOW.Com Content Network
Scleractinia, also called stony corals or hard corals, are marine animals in the phylum Cnidaria that build themselves a hard skeleton.The individual animals are known as polyps and have a cylindrical body crowned by an oral disc in which a mouth is fringed with tentacles.
A science dive on coral reefs in Karimunjawa. Coral reef restoration strategies use natural and anthropogenic processes to restore damaged coral reefs. [1] Reefs suffer damage from a number of natural and man-made causes, and efforts are being made to rectify the damage and restore the reefs.
Coral reef farming involves extracting a part of a coral colony or free-floating larvae from a reef, and growing them in a nursery until outplanting [5] would be successful. It is commonly referred to as the "gardening method" and has been compared to silviculture as a management practice that mimics natural ecosystems.
The first step is to extract the corresponding points in two x-ray images. The second step is to reconstruct the image in three dimensions using algorithms like Discrete Linear Transform (DLT). [13] The reconstruction is only possible where there are Stereo Corresponding Points (SCPs).
Deep-water coral Paragorgia arborea and a Coryphaenoides fish at a depth of 1,255 m (4,117 ft) on the Davidson Seamount. The habitat of deep-water corals, also known as cold-water corals, extends to deeper, darker parts of the oceans than tropical corals, ranging from near the surface to the abyss, beyond 2,000 metres (6,600 ft) where water temperatures may be as cold as 4 °C (39 °F).
Mesophotic coral ecosystem in the Marshall Islands. Photo by Luiz A. Rocha.. A mesophotic coral reef or mesophotic coral ecosystem (MCE), originally from the Latin word meso (meaning middle) and photic (meaning light), is characterized by the presence of both light-dependent coral and algae, and organisms that can be found in water with low light penetration.
The conservation and restoration of photographs is the study of the physical care and treatment of photographic materials. It covers both efforts undertaken by photograph conservators, librarians, archivists, and museum curators who manage photograph collections at a variety of cultural heritage institutions, as well as steps taken to preserve collections of personal and family photographs.
The adult crown-of-thorns is a corallivorous predator that usually preys on reef scleractinian coral polyps, as well as encrusting sessile invertebrates and dead animals. [21] [22] It climbs onto a section of living coral colony using the large number of tube feet, which lie in distinct ambulacral grooves on the oral surface. [23]