Trophic structure on the West Antarctic Peninsula shelf: detritivory and benthic inertia revealed by δ13C and δ15N analysis
Summer bloom-derived phytodetritus settles rapidly to the seafloor on the West Antarctic
Peninsula (WAP) continental shelf, where it appears to degrade relatively slowly, forming a
sediment “food bank” for benthic detritivores. We used stable carbon and nitrogen isotopes
to examine sources and sinks of particulate organic material (POM) reaching the WAP shelf
benthos (550–625m depths), and to explore trophic linkages among the most abundant
benthic megafauna. We measured δ13C and δ15N values in major megafaunal taxa (n= 26) …
Peninsula (WAP) continental shelf, where it appears to degrade relatively slowly, forming a
sediment “food bank” for benthic detritivores. We used stable carbon and nitrogen isotopes
to examine sources and sinks of particulate organic material (POM) reaching the WAP shelf
benthos (550–625m depths), and to explore trophic linkages among the most abundant
benthic megafauna. We measured δ13C and δ15N values in major megafaunal taxa (n= 26) …
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