radiolaria - Marum

Radiolaria 14 Bibliography - 1989
Bibliography 1989-1994
Luis O'Dogherty
Since Radiolaria 13, almost four years of bibliographical silence have passed. This compilation intends to cover this
time span. I am perfectly aware of the impossibility to compile a complete bibliography including all existing references.
Therefore, you are kindly requested to notify any mistake or omitted reference. In this place, I wish to express my most
sincere thanks to all those colleagues that sending their articles had collaborated and made possible this bibliography. Thanks
to everybody.
Adachi, M. 1989. Discovery of Late Triassic radiolarians
from the Ino Formation, central Shikoku. J. geol. Soc. Japan,
95/1, 81-83. (in Japanese)
Adams, K.E. & Siok, J.P. 1989. Permian stratigraphy
in the Atigun Gorge area; a transition between the Echooka
and Siksikpuk formations. In: Dalton Highway, Yukon River
to Prudhoe Bay, Alaska; bedrock geology of the eastern
Koyukuk Basin, central Brooks Range, andeastcentral Arctic
Slope. Guidebook. (Mull, C.G. et al., Eds.), vol. 7. Alaska
Division of geological and geophysical Surveys, Report, pp.
267-276.
Alexandrovich, J.M. 1989. Radiolarian biostratigraphy
of ODP Leg 111, Site 677, eastern equatoria6l Pacific, Late
Miocene through Pleistocene. In: Proceedings of the Ocean
Drilling Program, Scientific Results. (Becker, K., Sakai, H. et
al., Eds.), vol. 111. College Station, TX (Ocean Drilling
Program), pp. 245-262.
Well-preserved late Miocene through Pleistocene age
radiolarian assemblages were recovered during ODP Leg 111 at Site
677, on the southern flank of the Costa Rica Rift in the eastern
equatorial Pacific. Radiolarian "event" biostratigraphy (first and last
morphotypic appearances) was established for Holes 677A and
677B using 21 species yielding 24 reliable datum levels. The cold
upwelling waters above this site have prevented many typical
tropical Pacific stratigraphic radiolarians from being useful age
indicators. Biostratigraphic datum levels were assigned absolute
ages based on previous work and were used to date the cores.
Sedimentation rates varied from 3.7 cm/1000 yr. in the late
Pleistocene to 6.0 cm/1000 yr. in the late Miocene. The age of the
oldest sediments at this site is estimated as 5.89-6.37 Ma, which
indicates that Site 677 is between magnetic anomalies 3A and 4. A
total of 67 taxa were assessed for stratigraphic relevance at this
site and are listed in the Appendix. One previously unknown Pliocene
radiolarian stratigraphic indicator, Botryostrobus euporus
(Ehrenberg), is identified.
Alexandrovich, J.M. & Hays, J.D. 1989. Highresolution
stratigraphic correlation of ODP Leg 111 Holes
677A and 677B and DSDP Leg 69 Hole 504. In: Proceedings
of the Ocean Drilling Program, Scientific Results. (Becker,
K., Sakai, H. et al., Eds.), vol. 111. College Station, TX
(Ocean Drilling Program), pp. 263-276.
The recovery of continuous sedimentary sequences has been
and is a high-priority goal of the Ocean Drilling Program, yet its
success has not been determined. We test the stratigraphic
continuity of continuously cored sequences from ODP Leg 111 Holes
677A and 677B and DSDP Leg 69 Hole 504. The two holes at Site
677 and Hole 504 are correlated using high-resolution
biostratigraphy, tephra stratigraphy, and time series of opaline silica
and calcium carbonate. The correlation coefficient between the time
series is maximized through an inverse correlation procedure.
Changes in slope of the mapping function that relates the two
sections indicate gaps or changes in the accumulation rate between
sections. We assume as a first approximation that the sedimentary
sequences are identical in each hole, given their close proximity.
Slope changes of the mapping functions therefore result from errors
introduced by coring. This assumption is justified by the fact that
most mapping function slope changes occur at core breaks. Having
identified missing sections in one site, it is possible to fill these
gaps with the appropriate section from the adjacent site, thereby
improving continuity. This is possible only where the sediment gaps
identified at core breaks in one hole do not correspond to core break
levels in the other hole. Results show that in the upper 100 m of the
stratigraphic column, 3.1°70 and 4.6°70 were unsampled in Holes
1989
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677A and 677B, respectively, and 15°70 of the Pliocene portion of
Hole 504 was not sampled by the hydraulic piston corer. This
indicates that even in relatively calm seas, double or triple coring is
required in order to ensure that gaps and doubly sampled intervals of
the stratigraphic column which occur at core breaks are recognized
and sampled at least once.
Anderson, O.R. 1989. Some observations of feeding
behavior, growth, and test particlemorphology of a silicasecreting
testae Amoeba Netzelia tuberculata (Wallich)
(Rhizopoda, Testacea) grown in laboratory culture. Arch.
Protistenkunde, 137, 211-221.
Netzelia tuberculata (WALLICH) fed with Iyophilized yeast in
laboratory culture grows more rapidly (mean doubling time = 1.7 d)
and produces siliceous test particles that are more smooth,
spheroidal and regularly arranged than those fed with Spirogyra
(mean doubling time = 3 1 d). The change in test particle morphology
is observable during test secretion of the daughter cell in the first
generation after transfer into a yeast medium. Successive
generations exhibit increasingly more smooth and regularly arranged
spheroidal test particles. N. tuberculata grown in a medium
containing only soluble silicate (21 µM sodium silicate) reproduced
and secreted siliceous test particles. Hence, a particulate source of
silicate is not necessary for test particle synthesis. These results
give further evidence of the ecophenotypic variation in test particle
morphology of Netzelia tuberculata, in this case induced by
variations in kind of food, and suggest that additional research is
warranted on the cellular processes that determine the morphology
of biomineralized products in these testate amoebae.
Anderson, O.R., Bennett, P. & Bryan, M. 1989a.
Experimental and observational studies of radiolarian
physiological ecology: 1. Growth, abundance and opal
productivity of the spongiose radiolarian Spongaster tetras
tetras. Mar. Micropaleontol., 14/4, 257-266.
The mean growth, longevity and percent of S. tetras tetras
producing swarmers in laboratory-cultures were examined as a
function of variations in water temperature, salinity and the
intensity of illumination. Radiolaria were grown as individuals in
optically clear glass vials maintained in environmentally controlled
water baths and observed daily by light microscopy. The optimum
growth and longevity occurred at moderately warmer temperatures
and higher salinities (e.g. 27.5°C and 40‰ salinity) where maximum
survival was 23 days compared to 4 days at a temperature of 21°C
and 30‰ salinity. At higher temperatures of 33°C and 36°C, the
maximum longevity was 2 and zero days respectively. Light was
required for production of reproductive swarmers, but not for
growth. At temperatures near or below 15°C, the axopodia became
aggregated together or remained permanently withdrawn
incumbering food gathering. Few individuals produced reproductive
swarmers at 15°C and none produced swarmers at a temperature of
10°C. These data indicate that S. tetras tetras may be restricted to
warmer temperature water masses with an upper limit near 31°C.
They survive better with higher salinity and warmer water (c. 28°C).
Cold water and particularly dark conditions that occur at great
depth, may not support large populations of S. tetras tetras since
swarmer release is inhibited and, among other factors, food
gathering is suppressed due to axopodial impairment.
Anderson, O.R., Bennett, P., Angel, D. & Bryan,
M. 1989b. Experimental and observational studies of
radiolarian physiological ecology: 2. Trophic activity and
symbiont primary productivity of Spongaster tetras tetras
with comparative data on predatory activity of some
Nassellarida. Mar. Micropaleontol., 14/4, 267-273.