burrowing organism造句

• Actively filled burrows, on the other hand, are filled with material by the burrowing organism itself.
• The lack of distinct layering indicates that clams, shrimps, and other burrowing organisms mixed the bottom sediments.
• Because lamination is a fine structure, it is easily destroyed by bioturbation ( the activity of burrowing organisms ) shortly after deposition.
• Sloughing is probably a means of eliminating old reproductive structures and damaged surface cells, and reducing the risk of surface penetration by burrowing organisms.
• The burrowing organisms lack a true foot; they have a large pair of jaws and a small radula, comprising a dozen rows of paired teeth.
• Sloughing in this case is probably a means of eliminating old reproductive structures and grazer-damaged surface cells, and reducing the likelihood of surface penetration by burrowing organisms.
• The lack of fissility or layering in mudstone may be due either to the original texture or to the disruption of layering by burrowing organisms in the sediment prior to lithification.
• According to JORDAN ( 1968 ), this appearance is caused by the tracks of burrowing organisms, which consist primarily of siliceous sponge spicules which have been washed into the burrows.
• Burrowing organisms seem to have used the high-sulfur decay fluids as a nutrient source when farming bacteria in the microenvironment under the carapaces, indicated by their repeated uses of individual burrows.
• Further, it reduced the abundance of burrowing organisms  burrows and trackways " are " found in beds containing soft-bodied organisms, but they are rare and generally of limited vertical extent.
• It has been observed that the thin form of the alga grows laterally five times as fast as the thick form and is less likely to be attacked by burrowing organisms, so the association between the two organisms may be mutually beneficial.
• The increased level of bioturbation meant that sulfur, which is steadily supplied to the oceanic system from volcanoes and river runoff, was more readily oxidised-rather than being rapidly buried and sitting in its reduced form ( sulfide ), burrowing organisms continually exposed it to oxygen, allowing it to be oxidised to sulfate.