CHANGES IN INTENSITY OF MICROBORING IN BIVALVES ACROSS DEPTH (15-264M) AND OVER TIME (2, 6, AND 13 YEARS) FROM LEE STOCKING ISLAND, BAHAMAS
Several shells, each of Arctica and Codakia, were analyzed per site for each year. Both water depth and the time of exposure on the seafloor play a major role in microboring patterns. The results show that regardless of shell type, shells at shallow depths had a greater density of microborings that decrease with increasing water depth. Similarly, shells from shallow sites also had the deepest penetration of borings into the shell. Over time, the shells from deeper sites showed increased density of borings at the shell surface but these borings occupied less depth within the shells than shells from shallow sites. The general trend is that within two years, both shell species experienced extensive boring that is more intense at shallow, euphotic sites. This study supports the findings of others, showing a decrease in boring with increasing depth of burial and an increase in boring density over-time. Changing patterns of microboring with environment over time may prove useful in identifying paleobathymetric information from fossilized shells.