Lazarus, David B; Bittniok, Beatrice; Diester-Haass, Lieselotte; Billups, Katharina; Ogawa, Yujiro; Takahashi, Kozo; Meyers, Philip A (2008): (Appendix A) Radiolarian abundances in ODP Hole 175-1084A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.773654, Supplement to: Lazarus, DB et al. (2008): Radiolarian and sedimentologic paleoproductivity proxies in late Pleistocene sediments of the Benguela Upwelling System, ODP Site 1084. Marine Micropaleontology, 68(3-4), 223-235, https://doi.org/10.1016/j.marmicro.2008.02.004
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Abstract:
The changing composition of radiolarian faunas from late Neogene deep-sea sediments has been used in recent years as a proxy for changes in marine paleoproductivity. We examine radiolarian faunas, organic carbon content (TOC), opal and coarse-fraction components over the last 270,000 years in sediments from ODP Hole 1084A, drilled in a high productivity upwelling region within the Benguela Upwelling System off the west coast of Africa. Age control is provided by stable oxygen isotope measurements of benthic foraminifera. Prior research has established that late Pleistocene glacial intervals in this upwelling system generally had higher productivity than interglacials. The radiolarian WADE (water-depth ecology) paleoproductivity index correlates well with TOC and opal in these samples, and all three parameters change in synchrony with the benthic isotope curve over all but the MIS 5e–6 time interval. WADE inferred productivity is significantly higher in glacials than interglacials. We conclude that the WADE index is a useful proxy for paleoproductivity at this location, as are also opal and organic carbon accumulation rates. Carbonate and carbonate based indices such as the accumulation rate of benthic foraminifera (BFAR) by contrast do not correlate well either to productivity indices or to the glacial–interglacial cycle, and are interpreted to primarily reflect carbonate dissolution.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -25.513880 * Longitude: 13.027770
Date/Time Start: 1997-09-21T03:10:00 * Date/Time End: 1997-09-24T03:15:00
Minimum DEPTH, sediment/rock: 0.69 m * Maximum DEPTH, sediment/rock: 49.20 m
Event(s):
175-1084A * Latitude: -25.513880 * Longitude: 13.027770 * Date/Time Start: 1997-09-21T03:10:00 * Date/Time End: 1997-09-24T03:15:00 * Elevation: -1991.9 m * Penetration: 605 m * Recovery: 511.56 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 65 cores; 605 m cored; 0 m drilled; 84.6 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Lazarus, David B | DSDP/ODP/IODP sample designation | ||
| 2 | AGE | Age | ka BP | Geocode | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Phelodinium cranwelliae | Phelodinium cranwell | # | Lazarus, David B | Lisiecki and Raymo (2005) | |
| 5 | Uvigerina spp., δ18O | Uvigerina spp. δ18O | ‰ PDB | Lazarus, David B | Mass spectrometer GV Instruments Isoprime | >250 µm, 1-5 specimens, includes three measurements of Cibicidoides spp. corrected by adding 0.61 per mil |
| 6 | Radiolarians, intermediate/radiolarians, warm ratio | WADE | Lazarus, David B | Counting >45 µm fraction | ||
| 7 | Radiolarians, warm | Rad warm | % | Lazarus, David B | Counting >45 µm fraction | |
| 8 | Radiolarians, temperate | Rad temperate | % | Lazarus, David B | Counting >45 µm fraction | |
| 9 | Radiolarians, intermediate water depth | Rad intermed | % | Lazarus, David B | Counting >45 µm fraction | |
| 10 | Radiolarians, upwelling | Rad upwelling | % | Lazarus, David B | Counting >45 µm fraction | |
| 11 | Carbon, organic, total | TOC | % | Lazarus, David B | Element analyser CHNS-O | |
| 12 | Accumulation rate, mass | MAR | g/cm2/ka | Lazarus, David B | Calculated | |
| 13 | Accumulation rate, benthic foraminifera by number | Acc rate benth forams | #/cm2/ka | Lazarus, David B | Counting >150 µm fraction | |
| 14 | Primary production of carbon | PP C | g/cm2/ka | Lazarus, David B | Calculated | |
| 15 | Uvigerina spp. | Uvigerina spp. | % | Lazarus, David B | Counting >150 µm fraction | |
| 16 | Calcium carbonate | CaCO3 | % | Lazarus, David B | Calculated | |
| 17 | Opal, biogenic silica | bSiO2 | % | Lazarus, David B | Opal, extraction; Mortlock & Froelich, 1989 | CF |
| 18 | Radiolarians | Rad | # | Lazarus, David B | Counting >45 µm fraction | total counted |
| 19 | Radiolarians | Rad | #/g | Lazarus, David B | Counting >45 µm fraction | |
| 20 | Opal, biogenic silica | bSiO2 | % | Lazarus, David B | Opal, extraction; Mortlock & Froelich, 1989 | |
| 21 | Acrosphaera murrayana | A. murrayana | # | Lazarus, David B | Counting >45 µm fraction | |
| 22 | Actinomma antarcticum | A. antarcticum | # | Lazarus, David B | Counting >45 µm fraction | A. antarcticum/medianum |
| 23 | Actinomma leptodermum | A. leptodermum | # | Lazarus, David B | Counting >45 µm fraction | A. leptodermum/haysi |
| 24 | Actinomma popofskii | A. popofskii | # | Lazarus, David B | Counting >45 µm fraction | |
| 25 | Actinomma boreale | A. boreale | # | Lazarus, David B | Counting >45 µm fraction | |
| 26 | Acanthosphaera corlocae | A. corlocae | # | Lazarus, David B | Counting >45 µm fraction | |
| 27 | Cladococcus sp. | Cladococcus sp. | # | Lazarus, David B | Counting >45 µm fraction | genus questionable |
| 28 | Heliodiscus asteriscus | H. asteriscus | # | Lazarus, David B | Counting >45 µm fraction | |
| 29 | Didymocyrtis tetrathalamus | D. tetrathalamus | # | Lazarus, David B | Counting >45 µm fraction | D. tetrathalamus/avita |
| 30 | Amphirhopalum ypsilon | A. ypsilon | # | Lazarus, David B | Counting >45 µm fraction | |
| 31 | Dictiocoryne profunda | D. profunda | # | Lazarus, David B | Counting >45 µm fraction | D. profunda/spp. |
| 32 | Spongocore cylindrica | S. cylindrica | # | Lazarus, David B | Counting >45 µm fraction | |
| 33 | Spongopyle osculosa group | S. osculosa gr | # | Lazarus, David B | Counting >45 µm fraction | |
| 34 | Spongotrochus venustum | S. venustum | # | Lazarus, David B | Counting >45 µm fraction | genus questionable |
| 35 | Octopyle stenozona | O. stenozona | # | Lazarus, David B | Counting >45 µm fraction | O. stenozona/T. octacantha |
| 36 | Larcopyle buetschlii | L. buetschlii | # | Lazarus, David B | Counting >45 µm fraction | |
| 37 | Lithelius minor | L. minor | # | Lazarus, David B | Counting >45 µm fraction | |
| 38 | Ommatodiscus irregularis | O. irregularis | # | Lazarus, David B | Counting >45 µm fraction | |
| 39 | Arachnocorys circumtexta | A. circumtexta | # | Lazarus, David B | Counting >45 µm fraction | |
| 40 | Plectacantha cresmastoplegma | P. cresmastoplegma | # | Lazarus, David B | Counting >45 µm fraction | P. cremastoplegma/spp. |
| 41 | Helotholus histricosa | H. histricosa | # | Lazarus, David B | Counting >45 µm fraction | H. histricosa/spp. |
| 42 | Lithomelissa setosa | L. setosa | # | Lazarus, David B | Counting >45 µm fraction | |
| 43 | Lithomelissa hystrix | L. hystrix | # | Lazarus, David B | Counting >45 µm fraction | |
| 44 | Antarctissa spp. | Antarctissa spp. | # | Lazarus, David B | Counting >45 µm fraction | |
| 45 | Pseudodictyophimus gracilipes | P. gracilipes | # | Lazarus, David B | Counting >45 µm fraction | P. gracilipes (platycephalus) |
| 46 | Botryocyrtis scutum | B. scutum | # | Lazarus, David B | Counting >45 µm fraction | |
| 47 | Carpocaniidae indeterminata | Carpocaniidae indet | # | Lazarus, David B | Counting >45 µm fraction | |
| 48 | Saccospyris antarctica | S. antarctica | # | Lazarus, David B | Counting >45 µm fraction | |
| 49 | Cornutella profunda | C. profunda | # | Lazarus, David B | Counting >45 µm fraction | C. profunda/clathrata |
| 50 | Peripyramis circumtexta | P. circumtexta | # | Lazarus, David B | Counting >45 µm fraction | |
| 51 | Cycladophora bicornis | C. bicornis | # | Lazarus, David B | Counting >45 µm fraction | |
| 52 | Cycladophora conica | C. conica | # | Lazarus, David B | Counting >45 µm fraction | C. conica/cosma |
| 53 | Cycladophora davisiana | C. davisiana | # | Lazarus, David B | Counting >45 µm fraction | |
| 54 | Dictyophimus crisiae | D. crisiae | # | Lazarus, David B | Counting >45 µm fraction | |
| 55 | Dictyophimus infabricatus | D. infabricatus | # | Lazarus, David B | Counting >45 µm fraction | |
| 56 | Pterocanium trilobum | P. trilobum | # | Lazarus, David B | Counting >45 µm fraction | P. trilobum/p. eucolpum |
| 57 | Pterocanium praetextum praetextum | P. praetextum praetextum | # | Lazarus, David B | Counting >45 µm fraction | |
| 58 | Pterocanium auritum | P. auritum | # | Lazarus, David B | Counting >45 µm fraction | |
| 59 | Pterocanium hirundo group | P. hirundo gr | # | Lazarus, David B | Counting >45 µm fraction | |
| 60 | Lipmanella dictyoceras | L. dictyoceras | # | Lazarus, David B | Counting >45 µm fraction | |
| 61 | Eucyrtidium acuminatum | E. acuminatum | # | Lazarus, David B | Counting >45 µm fraction | E. acuminatum/hexagonatum |
| 62 | Eucyrtidium calvertense | E. calvertense | # | Lazarus, David B | Counting >45 µm fraction | |
| 63 | Eucyrtidium teuscheri group | E. teuscheri gr | # | Lazarus, David B | Counting >45 µm fraction | |
| 64 | Lithostrobus hexagonalis | L. hexagonalis | # | Lazarus, David B | Counting >45 µm fraction | |
| 65 | Cyrtopera laguncula | C. laguncula | # | Lazarus, David B | Counting >45 µm fraction | Cyrtopera/C. laguncula |
| 66 | Stichocorys peregrina | S. peregrina | # | Lazarus, David B | Counting >45 µm fraction | |
| 67 | Theocorys veneris | T. veneris | # | Lazarus, David B | Counting >45 µm fraction | |
| 68 | Anthocyrtidium ophirense | A. ophirense | # | Lazarus, David B | Counting >45 µm fraction | |
| 69 | Anthocyrtidium zanguebaricum | A. zanguebaricum | # | Lazarus, David B | Counting >45 µm fraction | |
| 70 | Lamprocyclas maritalis | L. maritalis | # | Lazarus, David B | Counting >45 µm fraction | |
| 71 | Lamprocyrtis heteroporos | L. heteroporos | # | Lazarus, David B | Counting >45 µm fraction | L. heteroporos/hannai |
| 72 | Lamprocyrtis nigriniae | L. nigriniae | # | Lazarus, David B | Counting >45 µm fraction | |
| 73 | Pterocorys minythorax | P. minythorax | # | Lazarus, David B | Counting >45 µm fraction | |
| 74 | Pterocorys zancleus | P. zancleus | # | Lazarus, David B | Counting >45 µm fraction | |
| 75 | Theocorythium trachelium | T. trachelium | # | Lazarus, David B | Counting >45 µm fraction | |
| 76 | Botryostrobus aquilonaris | B. aquilonaris | # | Lazarus, David B | Counting >45 µm fraction | |
| 77 | Botryostrobus auritus/australis | B. auritus/australis | # | Lazarus, David B | Counting >45 µm fraction | |
| 78 | Phormostichoartus corbula | P. corbula | # | Lazarus, David B | Counting >45 µm fraction | |
| 79 | Phormostichoartus pitomorphus group | P. pitomorphus gr | # | Lazarus, David B | Counting >45 µm fraction | P. pitomorphus gr/fistula |
| 80 | Siphocampe arachnea | S. arachnea | # | Lazarus, David B | Counting >45 µm fraction | S. arachnea/lineata |
| 81 | Spirocyrtis spp. | Spirocyrtis spp. | # | Lazarus, David B | Counting >45 µm fraction | scalaris |
| 82 | Lophospyris pentagona | L. pentagona | # | Lazarus, David B | Counting >45 µm fraction | |
| 83 | Phormospyris stabilis stabilis | P. stabilis stabilis | # | Lazarus, David B | Counting >45 µm fraction | |
| 84 | Zygocircus spp. | Zygocircus spp. | # | Lazarus, David B | Counting >45 µm fraction | |
| 85 | Prunopyle antarctica | P. antarctica | # | Lazarus, David B | Counting >45 µm fraction | |
| 86 | Radiolarians, warm | Rad warm | # | Lazarus, David B | Counting >45 µm fraction | |
| 87 | Radiolarians, temperate | Rad temperate | # | Lazarus, David B | Counting >45 µm fraction | |
| 88 | Radiolarians, intermediate water depth | Rad intermed | # | Lazarus, David B | Counting >45 µm fraction | |
| 89 | Radiolarians, upwelling | Rad upwelling | # | Lazarus, David B | Counting >45 µm fraction | |
| 90 | Radiolarians, other | Rad other | # | Lazarus, David B | Counting >45 µm fraction |
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