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biomass

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Journal Article
Journal: GSA Bulletin
Published: 20 December 2017
GSA Bulletin (2017) 130 (5-6): 941-951.
... (P, Mn, Co, Ni, Cu, Zn, Mo, Cd) that could have been associated with their biomass. Using an expanded geochemical data set for the Dales Gorge Member as an example, we find that with turnover times comparable to those seen in modern ecosystems, the same phytoplankton populations required to form...
FIGURES
Series: GSA Special Papers
Published: 01 May 2009
DOI: 10.1130/2009.2450(01)
Journal Article
Journal: Geology
Published: 01 March 2002
Geology (2002) 30 (3): 239-242.
...-hydrate system. Hydrate-bearing and hydrate-free sediments were collected from the Gulf of Mexico slope using a research submersible. Phospholipid fatty acids consist mainly of C 16 –C 18 compounds, which are largely derived from bacteria. The phospholipid fatty acids suggest that total biomass...
FIGURES
Journal Article
Journal: Geology
Published: 01 July 2000
Geology (2000) 28 (7): 663-666.
... different from the dates of bulk peat, indicating that the reservoir effect was not focused in a specific subfraction of biomass. Instead, we propose that old carbon was incorporated directly into the peat-forming vegetation via fixation of old CO 2 . 24 04 2000 30 12 1999 20 04 2000...
FIGURES
Journal Article
Published: 01 July 2000
Journal of Foraminiferal Research (2000) 30 (3): 177-191.
... at station 1 (lower intertidal zone). Species diversity showed reasonable annual cyclicity at both stations. At neither station is there any correlation between the size of the standing crop and the chlorophyll a content of the surface sediment. There was some cyclicity in the peaks of biomass (only...
FIGURES | View All (9)
Journal Article
Journal: PALAIOS
Published: 01 February 2000
PALAIOS (2000) 15 (1): 3-13.
...JANELLE S. PRYOR; ROBERT A. GASTALDO Abstract The biomass within two Early Pennsylvanian (Langsettian [Westphalian A] equivalent) penecontemporaneous swamp communities was sampled quantitatively to obtain an estimate of the taxonomic contribution to each assemblage. Blocks of organic-rich shale...
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Journal Article
Journal: Geology
Published: 01 August 1999
Geology (1999) 27 (8): 723-726.
... decrease in atmospheric CO 2 . It is estimated that the geologically instantaneous combustion of ∼18%–24% of the terrestrial above-ground biomass would be necessary to account for the measured negative isotopic shift at the K-T boundary, on the basis of carbon mass balance between terrestrial above-ground...
Journal Article
Journal: Economic Geology
Published: 01 February 1999
Economic Geology (1999) 94 (1): 109-113.
... a "crop" of a metal over ores subeconomic for conventional mining) could be a viable option since it has been calculated that a net return of $1,200/ha (twice the return from a crop of wheat) would be possible with a biomass yield of 10 t/ha containing 0.08 percent Tl in dry matter. The break-even point...
Journal Article
Published: 01 December 1998
American Mineralogist (1998) 83 (11-12_Part_2): 1583-1592.
... surrounding the microbial mat, indicate that chemoautotrophic metabolism of bacteria in this mat may contribute to the biomass of Sulphur River. Cave communities, such as the one identified in Sulphur River, provide sites to study such relatively autonomous chemoautotrophic communities that are much more...
Journal Article
Journal: PALAIOS
Published: 01 October 1998
PALAIOS (1998) 13 (5): 439-458.
... Thalassiothrix longissima mats or Chaetoceros setae. Mat laminae reflect stratified water conditions and high biomass conditions developed via vertically migrating diatom mats. Setae laminae are problematic to interpret. Macerated biosilica laminae, consisting of closely packed and highly fragmented biosilica...
Journal Article
Journal: Geology
Published: 01 January 1998
Geology (1998) 26 (1): 51-54.
..., CO 2 , sulfate, K, Li, U, O 2 , nitrate, and phosphate, and enriched in Ca, chlorinity, ammonia, Fe, Mn, H 2 S, H 2 , CH 4 , 222 Rn, and 226 Ra. The springs appear to support a community of thysirid clams. Although we saw no obvious bacterial mats, the surficial sediments contain the highest biomass...
Journal Article
Journal: PALAIOS
Published: 01 April 1997
PALAIOS (1997) 12 (2): 127-132.
Journal Article
Journal: Paleobiology
Published: 01 April 1997
Paleobiology (1997) 23 (2): 247-262.
... mutual feedback system of diversification" now recognized as the Cambrian explosion (Stanley 1973, 1976). By consuming significant percentages of net phytoplankton and suspending it as animal biomass and non-aggregating fecal pellets, mesozooplankton cause a net reduction in export production; a general...
Journal Article
Journal: PALAIOS
Published: 01 October 1996
PALAIOS (1996) 11 (5): 409-410.
Journal Article
Published: 01 July 1994
Micropaleontology (1994) 40 (3): 275-285.
Journal Article
Journal: Geology
Published: 01 December 1993
Geology (1993) 21 (12): 1149-1151.
Journal Article
Published: 01 March 1991
Bulletin de la Société Géologique de France (1991) 162 (2): 227-237.
Journal Article
Published: 01 May 1988
Bulletin de la Société Géologique de France (1988) IV (3): 437-452.
...G. Bongo-Passi; F. Gadel; P. Giresse; Kinga-Mouzeo; G. Moguedet Africa alluvial fans Atlantic Ocean biogenic structures biomass bioturbation Cenozoic Central Africa clastic sediments coarse-grained materials Congo Democratic Republic Congo River cores deposition detrital...
Journal Article
Published: 01 January 1988
Journal of Sedimentary Research (1988) 58 (1): 89-99.
... comprising nearly the full spectrum of basic macrostromatolite growth forms (i.e., columnar, bulbous, and nodular). Petrographic observations suggest a mechanism for microstromatolite morphogenesis involving the generation of primary producer biomass at the outer surfaces of the structures and the subsequent...
Journal Article
Journal: PALAIOS
Published: 01 December 1986
PALAIOS (1986) 1 (6): 525-542.