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| Stott, Lowell D. |
| There is a growing database of radiocarbon (14C) reconstructions from biogenic carbonate taken from marine sediment cores being used to investigate changing ocean circulation and carbon cycling at the end of the last great ice age. Reported here are 14C results from a marine core taken in the Makassar Straits of the western equatorial Pacific that was intended to test whether there was evidence of geologic carbon release to the ocean during the glacial termination. A thorough investigation of planktic and benthic 14C ages with stable isotopes and CT-scans revealed extensive burrowing in the upper 2 m of the core that displaced younger sediments downward by more than half a meter into the glacial section of the core. The vertical displacement is evident in... |
| Tipo: Text |
Palavras-chave: Isotope analysis; Mysterious radiocarbon anomalies. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00643/75468/76291.pdf |
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| Albo-puigserver, Marta; Navarro, Joan; Coll, Marta; Aguzzi, Jacopo; Cardona, Luis; Saez-liante, Raquel. |
| Understanding how marine predators interact is a scientific challenge. In marine ecosystems, segregation in feeding habits has been largely described as a common mechanism to allow the coexistence of several competing marine predators. However, little is known about the feeding ecology of most species of chondrichthyans, which play a pivotal role in the structure of marine food webs worldwide. In this study, we examined the trophic ecology of 3 relatively abundant chondrichthyans coexisting in the Mediterranean Sea: the blackmouth catshark Galeus melastomus, the velvet belly lanternshark Etmopterus spinax and the rabbit fish Chimaera monstrosa. To examine their trophic ecology and interspecific differences in food habits, we combined the analysis of... |
| Tipo: Text |
Palavras-chave: Feeding niche; Isotope analysis; Mediterranean Sea; Galeus melastomus; Etmopterus spinax; Chimaera monstrosa. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00266/37721/73392.pdf |
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