TY - JOUR
T1 - Metazoan meiofauna within the oxygen-minimum zone off Chile
T2 - Results of the 2001-PUCK expedition
AU - Veit-Köhler, Gritta
AU - Gerdes, Dieter
AU - Quiroga, Eduardo
AU - Hebbeln, Dierk
AU - Sellanes, Javier
N1 - Funding Information:
The authors thank all participants of the R/V SONNE 156 Cruise (PUCK expedition 2001) who contributed to the success of this study. Prof. Dr. V.A. Gallardo and Prof. Dr. W. Arntz, who were the driving force for analyzing the meiofauna samples from this expedition and made the samples available to the DZMB, are especially thanked. The DZMB service team, A. Henche and M. Bruhn, centrifuged the samples and sorted the meiofauna. J. Knott, C. Plum, and B. Wenzel were considerably helpful with the sorting. X. Contardo carried out the grain size analysis. D. Barriga is thanked for editing and improving the English version. The expedition was funded by the German BMBF (no. 03G0156A) and organized in the framework of the FONDAP Humboldt Programme 1997–2000 (CONICYT, Chile). Ongoing cooperation between the AWI and UdeC was funded by the International Bureau of the BMBF (Project no. CHL01/010). The COPAS center (CONICYT, Chile) and the AWI provided additional funding.
PY - 2009/7/15
Y1 - 2009/7/15
N2 - A quantitative study of metazoan meiofauna was carried out at continental shelf and slope stations affected by the oxygen-minimum zone in the eastern South Pacific off Chile. Densities of meiobenthos at the investigated stations off Antofagasta (22°S), Concepción (36°S), and Chiloé (42°S) ranged from 1282.1 to 8847.8 ind 10 cm-2. Oxygen deficiency led only to average abundances, despite higher food availability and freshness at the corresponding sites. Sediment organic carbon, chlorophyll-a, and phaeopigment contents were used as measures of the input from water-column primary production, which accumulated at the oxygen-minimum zone stations. The highest abundances were found at a station with an oxygen content of 0.79 mL L-1, which was slightly elevated from what is defined as oxygen minimum (0.5 mL L-1). The most oxygenated site yielded the lowest densities. Meiofauna assemblages became more diverse with increasing bottom-water oxygenation, whereas nematodes were the most abundant taxon at every station, followed by annelids, copepods, and nauplii.
AB - A quantitative study of metazoan meiofauna was carried out at continental shelf and slope stations affected by the oxygen-minimum zone in the eastern South Pacific off Chile. Densities of meiobenthos at the investigated stations off Antofagasta (22°S), Concepción (36°S), and Chiloé (42°S) ranged from 1282.1 to 8847.8 ind 10 cm-2. Oxygen deficiency led only to average abundances, despite higher food availability and freshness at the corresponding sites. Sediment organic carbon, chlorophyll-a, and phaeopigment contents were used as measures of the input from water-column primary production, which accumulated at the oxygen-minimum zone stations. The highest abundances were found at a station with an oxygen content of 0.79 mL L-1, which was slightly elevated from what is defined as oxygen minimum (0.5 mL L-1). The most oxygenated site yielded the lowest densities. Meiofauna assemblages became more diverse with increasing bottom-water oxygenation, whereas nematodes were the most abundant taxon at every station, followed by annelids, copepods, and nauplii.
KW - Continental margin
KW - Copepoda
KW - Meiofauna communities
KW - Nematoda
KW - Oxygen-deficient sediments
KW - Oxygen-minimum zone
UR - http://www.scopus.com/inward/record.url?scp=67649392445&partnerID=8YFLogxK
U2 - 10.1016/j.dsr2.2008.09.013
DO - 10.1016/j.dsr2.2008.09.013
M3 - Article
AN - SCOPUS:67649392445
SN - 0967-0645
VL - 56
SP - 1105
EP - 1111
JO - Deep-Sea Research Part II: Topical Studies in Oceanography
JF - Deep-Sea Research Part II: Topical Studies in Oceanography
IS - 16
ER -