TY - JOUR
T1 - Stable isotope profiles from subtropical marine gastropods of the family Fasciolariidae
T2 - Growth histories and relationships to local environmental conditions
AU - Strauss, Josiah
AU - Oleinik, Anton
AU - Swart, Peter
N1 - Funding Information:
Acknowledgments We thank amel Saied and Corey Schroeder of the University of Miami rSMaS stable isotope laboratory for their assistance with stable isotope measurements and ethan grossman for providing a review of an early draft of the manuscript. This manuscript was also improved by helpful comments from gregory Dietl, Chris Harrod, and two anonymous reviewers. We thank the Department of Fisheries of the Commonwealth of the Bahamas for issuing a permit to collect in Cay Sal Bank. This study was supported by a student grant provided by the Conchologists of america and in part by national Science Foundation grant OPP 0095095.
PY - 2014/6
Y1 - 2014/6
N2 - Oxygen and carbon stable isotope profiles were constructed for two species of large subtropical gastropods of the family Fasciolariidae-Triplofusus giganteus and Fasciolaria tulipa-from the Florida Keys and the Bahamas, to evaluate their life history and to assess their potential as paleoenvironmental proxies. Oxygen isotope profiles revealed T. giganteus and F. tulipa grew their shells for 6 and 3 years, respectively. Both mollusks show faster growth rates during the first half of their lifespan. Mean annual temperatures (MAT) derived from oxygen isotopes for T. giganteus were 26.5 °C and for F. tulipa were 26.7 °C, both matching instrumental MATs of 26.7 and 26.5 °C for the Florida Keys. Both shells, however, failed to record entire mean annual temperature ranges (MART). Fasciolaria tulipa yielded a calculated MART of 5.6 °C compared with a measured MART of 9.3 °C, and T. giganteus showed a calculated MART of 6.9 °C compared with a measured MART of 9.4 °C. Carbon isotopes of T. giganteus were ambiguous and reveal no significant relationships with trends in nutrient concentrations (N and P), dissolved oxygen, and dissolved organic carbon, although they did exhibit more negative values concomitant with landfall of Hurricane Irene and trended to increasing values with ontogeny that could reflect migration. Carbon isotopes in F. tulipa were lower during winters, possibly reflecting seasonal upwelling or seagrass-mediated carbon cycling.
AB - Oxygen and carbon stable isotope profiles were constructed for two species of large subtropical gastropods of the family Fasciolariidae-Triplofusus giganteus and Fasciolaria tulipa-from the Florida Keys and the Bahamas, to evaluate their life history and to assess their potential as paleoenvironmental proxies. Oxygen isotope profiles revealed T. giganteus and F. tulipa grew their shells for 6 and 3 years, respectively. Both mollusks show faster growth rates during the first half of their lifespan. Mean annual temperatures (MAT) derived from oxygen isotopes for T. giganteus were 26.5 °C and for F. tulipa were 26.7 °C, both matching instrumental MATs of 26.7 and 26.5 °C for the Florida Keys. Both shells, however, failed to record entire mean annual temperature ranges (MART). Fasciolaria tulipa yielded a calculated MART of 5.6 °C compared with a measured MART of 9.3 °C, and T. giganteus showed a calculated MART of 6.9 °C compared with a measured MART of 9.4 °C. Carbon isotopes of T. giganteus were ambiguous and reveal no significant relationships with trends in nutrient concentrations (N and P), dissolved oxygen, and dissolved organic carbon, although they did exhibit more negative values concomitant with landfall of Hurricane Irene and trended to increasing values with ontogeny that could reflect migration. Carbon isotopes in F. tulipa were lower during winters, possibly reflecting seasonal upwelling or seagrass-mediated carbon cycling.
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U2 - 10.1007/s00227-014-2443-5
DO - 10.1007/s00227-014-2443-5
M3 - Article
AN - SCOPUS:84903316038
VL - 161
SP - 1593
EP - 1602
JO - Marine Biology
JF - Marine Biology
SN - 0025-3162
IS - 7
ER -