Distribution of benthic foraminifera in surface sediments east of New Zealand, Southwest Pacific Ocean
This study investigates which combination of environmental factors most strongly influences the distribution patterns of benthic foraminferal tests (>0.63 µm) in a region bisected by the Subtropical Front, east of New Zealand. Seafloor sample sites extend from outer shelf (90 m) to abyssal (4700...
Main Authors: | , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2002
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.690806 https://doi.org/10.1594/PANGAEA.690806 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.690806 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.690806 2023-05-15T13:42:09+02:00 Distribution of benthic foraminifera in surface sediments east of New Zealand, Southwest Pacific Ocean Hayward, Bruce William Neil, Helen L Carter, Rowan Grenfell, Hugh R Hayward, Jessica J MEDIAN LATITUDE: -43.278509 * MEDIAN LONGITUDE: -178.973191 * SOUTH-BOUND LATITUDE: -46.596700 * WEST-BOUND LONGITUDE: 172.393300 * NORTH-BOUND LATITUDE: -39.460000 * EAST-BOUND LONGITUDE: -171.498900 * DATE/TIME START: 1983-01-03T00:00:00 * DATE/TIME END: 1998-10-03T20:00:00 2002-04-14 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.690806 https://doi.org/10.1594/PANGAEA.690806 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.690806 https://doi.org/10.1594/PANGAEA.690806 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hayward, Bruce William; Neil, Helen L; Carter, Rowan; Grenfell, Hugh R; Hayward, Jessica J (2002): Factors influencing the distribution patterns of Recent deep-sea benthic foraminifera, east of New Zealand, Southwest Pacific Ocean. Marine Micropaleontology, 46(1-2), 139-176, https://doi.org/10.1016/S0377-8398(02)00047-6 181-1119A 181-1122C 181-1123B 181-1124B 181-1125A 90-594 Chatham_Rise Chatham Rise Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg181 Leg90 MULT Multiple investigations Ocean Drilling Program ODP South Pacific/CONT RISE South Pacific Ocean Dataset 2002 ftpangaea https://doi.org/10.1594/PANGAEA.690806 https://doi.org/10.1016/S0377-8398(02)00047-6 2023-01-20T07:31:09Z This study investigates which combination of environmental factors most strongly influences the distribution patterns of benthic foraminferal tests (>0.63 µm) in a region bisected by the Subtropical Front, east of New Zealand. Seafloor sample sites extend from outer shelf (90 m) to abyssal (4700 m) depths, across substrates ranging from biogenic/terrigenous gravelly sand to hemipelagic mud, and occur under the influence of Antarctic intermediate water (AAIW) and circumpolar deep waters as well as receiving detritus from both Subtropical and Subantarctic surface water masses. Elevated values of the planktic foraminiferal fragmentation index and reworked small Paleogene planktic foraminifera at outer shelf and bathyal depths coincide with areas of strong bottom currents. Q-mode cluster analysis on the census counts of 398 benthic species clusters the 66 samples into three large groups (shallow, bathyal, abyssal), and at a lower level 10 mappable associations are recognised. A combination of canonical correspondence analysis and a correlation coefficient matrix was used to relate the faunal data to a set of measured environmental proxies. These analyses show that factors that have a relationship with depth are the most significant in determining foraminiferal distribution. The principal environmental factors which appear to most strongly influence this benthic foraminiferal distribution are: dissolved oxygen content in bottom waters; sustainability of organic carbon flux rates; seasonality of food supply; lateral advection of water masses; bottom water carbonate corrosiveness; energetic state at the benthic boundary layer; grain-size composition of substrate; salinity and temperature of the bottom waters. Shallow water associations (90-1250 m), dominated by Cassidulina carinata and Trifarina angulosa, occur within coarse substrates under well-oxygenated, high energy regimes and sustained food input. The occurrence of the bathyal associations (230-2840 m), dominated by C. carinata, Alabaminella weddellensis and ... Dataset Antarc* Antarctic PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Pacific New Zealand ENVELOPE(172.393300,-171.498900,-39.460000,-46.596700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
181-1119A 181-1122C 181-1123B 181-1124B 181-1125A 90-594 Chatham_Rise Chatham Rise Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg181 Leg90 MULT Multiple investigations Ocean Drilling Program ODP South Pacific/CONT RISE South Pacific Ocean |
spellingShingle |
181-1119A 181-1122C 181-1123B 181-1124B 181-1125A 90-594 Chatham_Rise Chatham Rise Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg181 Leg90 MULT Multiple investigations Ocean Drilling Program ODP South Pacific/CONT RISE South Pacific Ocean Hayward, Bruce William Neil, Helen L Carter, Rowan Grenfell, Hugh R Hayward, Jessica J Distribution of benthic foraminifera in surface sediments east of New Zealand, Southwest Pacific Ocean |
topic_facet |
181-1119A 181-1122C 181-1123B 181-1124B 181-1125A 90-594 Chatham_Rise Chatham Rise Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg181 Leg90 MULT Multiple investigations Ocean Drilling Program ODP South Pacific/CONT RISE South Pacific Ocean |
description |
This study investigates which combination of environmental factors most strongly influences the distribution patterns of benthic foraminferal tests (>0.63 µm) in a region bisected by the Subtropical Front, east of New Zealand. Seafloor sample sites extend from outer shelf (90 m) to abyssal (4700 m) depths, across substrates ranging from biogenic/terrigenous gravelly sand to hemipelagic mud, and occur under the influence of Antarctic intermediate water (AAIW) and circumpolar deep waters as well as receiving detritus from both Subtropical and Subantarctic surface water masses. Elevated values of the planktic foraminiferal fragmentation index and reworked small Paleogene planktic foraminifera at outer shelf and bathyal depths coincide with areas of strong bottom currents. Q-mode cluster analysis on the census counts of 398 benthic species clusters the 66 samples into three large groups (shallow, bathyal, abyssal), and at a lower level 10 mappable associations are recognised. A combination of canonical correspondence analysis and a correlation coefficient matrix was used to relate the faunal data to a set of measured environmental proxies. These analyses show that factors that have a relationship with depth are the most significant in determining foraminiferal distribution. The principal environmental factors which appear to most strongly influence this benthic foraminiferal distribution are: dissolved oxygen content in bottom waters; sustainability of organic carbon flux rates; seasonality of food supply; lateral advection of water masses; bottom water carbonate corrosiveness; energetic state at the benthic boundary layer; grain-size composition of substrate; salinity and temperature of the bottom waters. Shallow water associations (90-1250 m), dominated by Cassidulina carinata and Trifarina angulosa, occur within coarse substrates under well-oxygenated, high energy regimes and sustained food input. The occurrence of the bathyal associations (230-2840 m), dominated by C. carinata, Alabaminella weddellensis and ... |
format |
Dataset |
author |
Hayward, Bruce William Neil, Helen L Carter, Rowan Grenfell, Hugh R Hayward, Jessica J |
author_facet |
Hayward, Bruce William Neil, Helen L Carter, Rowan Grenfell, Hugh R Hayward, Jessica J |
author_sort |
Hayward, Bruce William |
title |
Distribution of benthic foraminifera in surface sediments east of New Zealand, Southwest Pacific Ocean |
title_short |
Distribution of benthic foraminifera in surface sediments east of New Zealand, Southwest Pacific Ocean |
title_full |
Distribution of benthic foraminifera in surface sediments east of New Zealand, Southwest Pacific Ocean |
title_fullStr |
Distribution of benthic foraminifera in surface sediments east of New Zealand, Southwest Pacific Ocean |
title_full_unstemmed |
Distribution of benthic foraminifera in surface sediments east of New Zealand, Southwest Pacific Ocean |
title_sort |
distribution of benthic foraminifera in surface sediments east of new zealand, southwest pacific ocean |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.690806 https://doi.org/10.1594/PANGAEA.690806 |
op_coverage |
MEDIAN LATITUDE: -43.278509 * MEDIAN LONGITUDE: -178.973191 * SOUTH-BOUND LATITUDE: -46.596700 * WEST-BOUND LONGITUDE: 172.393300 * NORTH-BOUND LATITUDE: -39.460000 * EAST-BOUND LONGITUDE: -171.498900 * DATE/TIME START: 1983-01-03T00:00:00 * DATE/TIME END: 1998-10-03T20:00:00 |
long_lat |
ENVELOPE(172.393300,-171.498900,-39.460000,-46.596700) |
geographic |
Antarctic Pacific New Zealand |
geographic_facet |
Antarctic Pacific New Zealand |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Supplement to: Hayward, Bruce William; Neil, Helen L; Carter, Rowan; Grenfell, Hugh R; Hayward, Jessica J (2002): Factors influencing the distribution patterns of Recent deep-sea benthic foraminifera, east of New Zealand, Southwest Pacific Ocean. Marine Micropaleontology, 46(1-2), 139-176, https://doi.org/10.1016/S0377-8398(02)00047-6 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.690806 https://doi.org/10.1594/PANGAEA.690806 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.690806 https://doi.org/10.1016/S0377-8398(02)00047-6 |
_version_ |
1766163318998827008 |