. Deep-ocean biodeterioration of materials. Materials; Marine sediments. Figure 9. Species of 1/4-inch-long deep-sea sponges. Typical fouling organisms found in shallow water, such as barnacles, tunicates, and bryozoa, were not found attached to the panels exposed at a depth of 6,800 feet. Wooden Panels. A total of twenty-six l/2x2x6-inch wooden test panels, which included pine, fir, ash, maple, cedar, oak, and redwood, were exposed to determine the effects of deep-sea animals on different woods. All the wooden panels were attacked by marine borers and sustained light-to-heavy damage. The seve
. Deep-ocean biodeterioration of materials. Materials; Marine sediments. Figure 9. Species of 1/4-inch-long deep-sea sponges. Typical fouling organisms found in shallow water, such as barnacles, tunicates, and bryozoa, were not found attached to the panels exposed at a depth of 6,800 feet. Wooden Panels. A total of twenty-six l/2x2x6-inch wooden test panels, which included pine, fir, ash, maple, cedar, oak, and redwood, were exposed to determine the effects of deep-sea animals on different woods. All the wooden panels were attacked by marine borers and sustained light-to-heavy damage. The severest damage was sustained by cedar and oak; moderate damage was sustained by ash, pine, fir, and maple; and light damage was sustained by redwood. The external sides of the panels exposed to seawater appeared to be relatively free of any borer attack (Figure 10a); however, when the wooden panels were removed from the phenolic laminated plastic sheet and the sides attached to the plastic sheet were examined, it became evident that the interior of the wood was completely riddled by marine borers (Figure 10b). The majority of the borer tunnels measured about 5/16 inch in diameter. The average borer tunnels in redwood measured about 1/8 inch in diameter. The loss in weight of each of these panels due to borer damage is presented in the Appendix. The surface of the phenolic plastic sheet to which the wooden panels were attached was also damaged by borer activity (Figure 11).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Muraoka, James S; Naval Civil Engineering Laboratory (Port Hueneme, Calif. ). Port Hueneme, Calif. : U. S. Naval Civil Engineering Laboratory
Size: 1803px × 1386px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
