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RRS Challenger Cruise 142, 19 Apr-19 May 1999. Temporal and spatial variability of benthic communities on the Porcupine Abyssal Plain and in the Porcupine Seabight

RRS Challenger Cruise 142, 19 Apr-19 May 1999. Temporal and spatial variability of benthic communities on the Porcupine Abyssal Plain and in the Porcupine Seabight
RRS Challenger Cruise 142, 19 Apr-19 May 1999. Temporal and spatial variability of benthic communities on the Porcupine Abyssal Plain and in the Porcupine Seabight
RRS Challenger Cruise 142 aimed to study 1) long-term change in abyssal benthic communities (4850m, Porcupine Abyssal Plain) and 2) coral communities on carbonate mounds (c. 800m, Porcupine Seabight).

Sampling on the first leg was focussed at a central locality 48°50’N, 16°30’W) on the Porcupine Abyssal Plain. This locality had been sampled on 9 separate cruises over a 9-year period (1989-1998). A radical change in the composition of the benthic fauna had occurred in recent years and this cruise aimed to follow further long-term change in the benthic fauna and sediment biogeochemistry. In addition, in order to set the results from this central locality in a basin-wide context, further sampling was undertaken across the Porcupine Abyssal Plain.

Sampling on the second leg concentrated on the giant carbonate mounds discovered in recent years on the eastern and northern flanks of the Porcupine Seabight. The mounds had well-developed coral communities. Samples and video of the coral were collected. Other seabed features also noted in sidescan sonar records on previous cruises were imaged as well.
BENGAL, benthic communities, bottom photography, carbonate deposits, Challenger, coral, corers, cruise 142 1999, dredge, epibenthic sledge, geochemistry, holothurians, landers, megafauna, microbiology, Northeast Atlantic, photosledge, Porcupine Abyssal Plain, Porcupine Seabight, time series, trawls, videotape
30
Southampton Oceanography Centre
Billett, D.S.M.
aab439e2-c839-4cd2-815c-3d401e0468db
Billett, D.S.M.
aab439e2-c839-4cd2-815c-3d401e0468db

Billett, D.S.M. (2000) RRS Challenger Cruise 142, 19 Apr-19 May 1999. Temporal and spatial variability of benthic communities on the Porcupine Abyssal Plain and in the Porcupine Seabight (Southampton Oceanography Centre Cruise Report, 30) Southampton, UK. Southampton Oceanography Centre 79pp.

Record type: Monograph (Project Report)

Abstract

RRS Challenger Cruise 142 aimed to study 1) long-term change in abyssal benthic communities (4850m, Porcupine Abyssal Plain) and 2) coral communities on carbonate mounds (c. 800m, Porcupine Seabight).

Sampling on the first leg was focussed at a central locality 48°50’N, 16°30’W) on the Porcupine Abyssal Plain. This locality had been sampled on 9 separate cruises over a 9-year period (1989-1998). A radical change in the composition of the benthic fauna had occurred in recent years and this cruise aimed to follow further long-term change in the benthic fauna and sediment biogeochemistry. In addition, in order to set the results from this central locality in a basin-wide context, further sampling was undertaken across the Porcupine Abyssal Plain.

Sampling on the second leg concentrated on the giant carbonate mounds discovered in recent years on the eastern and northern flanks of the Porcupine Seabight. The mounds had well-developed coral communities. Samples and video of the coral were collected. Other seabed features also noted in sidescan sonar records on previous cruises were imaged as well.

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More information

Published date: 2000
Additional Information: Smaller version of pdf added Sept 2005 as original is slow to open
Keywords: BENGAL, benthic communities, bottom photography, carbonate deposits, Challenger, coral, corers, cruise 142 1999, dredge, epibenthic sledge, geochemistry, holothurians, landers, megafauna, microbiology, Northeast Atlantic, photosledge, Porcupine Abyssal Plain, Porcupine Seabight, time series, trawls, videotape

Identifiers

Local EPrints ID: 292
URI: http://eprints.soton.ac.uk/id/eprint/292
PURE UUID: 797d7a6b-8db5-4667-80a3-b99b9baaf3d9

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Date deposited: 21 Jan 2004
Last modified: 18 Nov 2019 19:26

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Contributors

Author: D.S.M. Billett

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