Annotated record of the detailed examination of Mn deposits from the CLIMAX II (SCAN) Expedition stations aboard R/V Argo in the central North Pacific


Autoria(s): Hessler, Robert R; Jumars, Peter A
Cobertura

MEDIAN LATITUDE: 24.050828 * MEDIAN LONGITUDE: -155.313619 * SOUTH-BOUND LATITUDE: -24.583031 * WEST-BOUND LONGITUDE: -155.500021 * NORTH-BOUND LATITUDE: 28.503588 * EAST-BOUND LONGITUDE: -154.863355 * DATE/TIME START: 1969-08-21T00:00:00 * DATE/TIME END: 1969-10-08T00:00:00 * MINIMUM DEPTH, sediment/rock: 0 m * MAXIMUM DEPTH, sediment/rock: 0 m

Data(s)

08/06/1974

Resumo

A 0.25 m US Naval Electronics Lab box corer was used to take replicate samples from an oligotrophic bottom under the North Pacific Central Water Mass (approx. 28 degrees N, 155 degrees W). The bottom is a red clay with manganese nodules at a depth of 5500-5800 m. Macrofaunal density ranges from 84 to 160 individuals per m super(2) and is therefore much the same as in Northwest Atlantic Gyre waters. Of the macrofaunal taxa, polychaetes dominate (55 per cent), followed by tanaids (18 per cent), bivalves (7 per cent), and isopods (6 per cent). Meiofaunal taxa were only partially retained by the 297 micrometer screen used in washing. Even then, they are 1.5-3.9 times as abundant as the microfaunal taxa, with nematodes being numerically dominant by far. Foraminifera seem to comprise an important portion of the community, but could not be assessed accurately because of the inability to discriminate living and dead tests. Remains of what are probably xenophyophoridans are also very important, but offer the same problem. Faunal diversity is extremely high, with deposit feeders comprising the overwhelming majority. Most spp are rare, being encountered only once. The distributions of only 3 spp show any significant deviation from randomness. The polychaete fauna from box cores collected from 90 m to the north was not significantly different from that of the principal study locality. Concordance appeared at several taxonomic levels, from spp through microfaunal/ meiofaunal relationships. As a result, the variation in total animal abundance shows aggregation among cores. The authors discuss Sokolova's concept of a deep-sea oligotrophic zone dominated by suspension feeders, and reconcile it with our present findings. The high diversity of the fauna combined with the low food level contradict theories that relate diversity directly with productivity.

Formato

text/tab-separated-values, 111 data points

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.861312

doi:10.1594/PANGAEA.861312

Idioma(s)

en

Publicador

PANGAEA

Relação

Grant, J Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, doi:10.7289/V52Z13FT

Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, doi:10.7289/V53X84KN

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Hessler, Robert R; Jumars, Peter A (1974): Abyssal community analysis from replicate cores in the central North Pacific. Deep Sea Research and Oceanographic Abstracts, 21(3), 185-209, doi:10.1016/0011-7471(74)90058-8

Palavras-Chave #Argo; BC; Box corer; CLIMAXII-075G; CLIMAXII-H14; CLIMAXII-H15; CLIMAXII-H16; CLIMAXII-H17; CLIMAXII-H18; CLIMAXII-H19C; CLIMAXII-H3; CLIMAXII-H5; CLIMAXII-H6; CLIMAXII-H7; CLIMAXII-H8; Comment; Date/Time of event; Deposit type; DEPTH, sediment/rock; Description; Dry volume; Elevation of event; Event label; GC; Gravity corer; H-03; H-05; H-06; H-07; H-08; H-14; H-15; H-16; H-17; H-18; H-19C; Latitude of event; Longitude of event; Mass; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Optional event label; Pacific Ocean; Photo/Video; Position; PV; Quantity of deposit; Sample ID; SCAN; SCAN-75G; Sediment type; Size; Substrate type
Tipo

Dataset