INVESTIGADORES
TATIAN Marcos
artículos
Título:
Role of suspension feeders in antarctic pelagic-benthic coupling: Trophic ecology and potential carbon sinks under climate change
Autor/es:
ALURRALDE G; FUENTES VL; MAGGIONI, T.; MOVILLA, J; OLARIAGA, A; OREJAS, C; SCHLOSS I; TATIAN, M
Revista:
MARINE ENVIRONMENTAL RESEARCH
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2019
ISSN:
0141-1136
Resumen:
Sea-ice and coastal glacier loss in the Western Antarctic Peninsula open new ice-free areas. They allowing primaryproduction and providing new seabed for colonisation, both acting as a negative feedback of climate change.However, the injection of sediment-laden runoff from the melting of land-terminating glaciers may reduce thisfeedback. Changes in particulate matter will affect nutrition and excretion (faeces stoichiometry and properties) ofsuspension feeders, reshaping coastal carbon dynamics and pelagic-benthic coupling. Absorption efficiency andbiodeposition of Euphausia superba and Cnemidocarpa verrucosa were quantified for different food treatments andvarying sediment concentrations. Both species showed high overall absorption efficiency for free-sediment diets,but were negatively affected by sediment addition. High sediment conditions increased krill biodeposition, while itdecreased in ascidians. Energy balance estimation indicated high carbon sink potential in ascidians, but it ismodulated by food characteristics and negatively affected by sediment inputs in the water column.