caa a22 4500 605455503 CHVBK 20210128100212.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s10872-015-0291-7 doi (NATIONALLICENCE)springer-10.1007/s10872-015-0291-7 Seasonal variations in the source of sea bottom organic matter off Catalonia coasts (western Mediterranean): links with hydrography and biological response [Elektronische Daten] [P. Rumolo, Joan Cartes, E. Fanelli, V. Papiol, M. Sprovieri, S. Mirto, S. Gherardi, A. Bonanno] Analyses of the total organic carbon (TOC), total nitrogen (TN), C/N ratio and isotopic (δ 13C and δ 15N) composition of organic matter (OM) in surficial sediments, integrated with hydrographic measurements, have been used to evaluate the sources and distribution of sedimentary organic matter on the Catalonian shelf and slope (northwest Mediterranean Sea). We examined the effects of the variations on meiofauna. Settled OM in February, April and October displayed δ 13C relatively closer to marine algae (mean −22.4‰±0.1) than that in July (−23.3, −23.7 and −22.7‰ at 60, 600 and 800m, respectively). Lowest δ 13C (−23.7‰) and high C/N (~10), indicative of mixed continental and marine organic contributions, were detected principally at the head of the Buscarró Canyon (at 600m) in July, ca. 2-3months after the maximum river discharge. We observed significant changes in total meiofaunal density among seasons in the canyon, with the highest values in July and October. On the adjacent slope at 800m there was no significant increase of total meiofauna in those months. Although export of marine organic matter from surface layers was the main food source in the study area (on average 71.2% estimating marine and terrestrial OC by binary models; 68-71% at the most by SIAR models), advection of organic matter from the continental edge and/or resuspension of organic matter along submarine canyons may seasonally alter the composition of deposits on the slope, particularly in July with % OC of terrestrial origin reaching 48.7% in Buscarró canyon, shifting the basal food-web of deep ecosystems. The Oceanographic Society of Japan and Springer Japan, 2015 Continental slope nationallicence Organic matter nationallicence Seasonality nationallicence Stable isotopes nationallicence Meiofauna nationallicence North western Mediterranean nationallicence Rumolo P. IAMC-CNR, Calata Porta di Massa (Interno Porto di Napoli), 80133, Naples, Italy aut Cartes Joan ICM-CSIC Institut de Ciénciès del Mar, Passeig Maritim de la Barceloneta 37-49, 08003, Barcelona, Spain aut Fanelli E. Marine Environment Research Centre ENEA-Santa Teresa, Pozzuolo di Lerici, 19100, La Spezia, SP, Italy aut Papiol V. ICM-CSIC Institut de Ciénciès del Mar, Passeig Maritim de la Barceloneta 37-49, 08003, Barcelona, Spain aut Sprovieri M. IAMC-CNR, Via del Mare, 3 Torretta Granitola, 91021, Fraz. Campobello di Mazara, TP, Italy aut Mirto S. IAMC-CNR, via G. da Verrazzano, 17, 91014, Castellammare del Golfo, TP, Italy aut Gherardi S. IAMC-CNR, Calata Porta di Massa (Interno Porto di Napoli), 80133, Naples, Italy aut Bonanno A. IAMC-CNR, Via del Mare, 3 Torretta Granitola, 91021, Fraz. Campobello di Mazara, TP, Italy aut Journal of Oceanography Springer Japan 71/4(2015-08-01), 325-343 0916-8370 71:4<325 2015 71 10872 https://doi.org/10.1007/s10872-015-0291-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10872-015-0291-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rumolo P. IAMC-CNR, Calata Porta di Massa (Interno Porto di Napoli), 80133, Naples, Italy aut NATIONALLICENCE 700 1- Cartes Joan ICM-CSIC Institut de Ciénciès del Mar, Passeig Maritim de la Barceloneta 37-49, 08003, Barcelona, Spain aut NATIONALLICENCE 700 1- Fanelli E. Marine Environment Research Centre ENEA-Santa Teresa, Pozzuolo di Lerici, 19100, La Spezia, SP, Italy aut NATIONALLICENCE 700 1- Papiol V. ICM-CSIC Institut de Ciénciès del Mar, Passeig Maritim de la Barceloneta 37-49, 08003, Barcelona, Spain aut NATIONALLICENCE 700 1- Sprovieri M. IAMC-CNR, Via del Mare, 3 Torretta Granitola, 91021, Fraz. Campobello di Mazara, TP, Italy aut NATIONALLICENCE 700 1- Mirto S. IAMC-CNR, via G. da Verrazzano, 17, 91014, Castellammare del Golfo, TP, Italy aut NATIONALLICENCE 700 1- Gherardi S. IAMC-CNR, Calata Porta di Massa (Interno Porto di Napoli), 80133, Naples, Italy aut NATIONALLICENCE 700 1- Bonanno A. IAMC-CNR, Via del Mare, 3 Torretta Granitola, 91021, Fraz. Campobello di Mazara, TP, Italy aut NATIONALLICENCE 773 0- Journal of Oceanography Springer Japan 71/4(2015-08-01), 325-343 0916-8370 71:4<325 2015 71 10872