In:
Paleoceanography, American Geophysical Union (AGU), Vol. 5, No. 2 ( 1990-04), p. 161-185
Abstract:
We report δ 13 C and δ 18 O values for Rose Bengal‐stained benthic foraminifera from a set of box cores from continental margin environments in the Atlantic and Pacific oceans. These isotopic results are compared with foraminiferal distribution data and pore water δ 13 C profiles to evaluate the importance of environmental (microhabitat) effects on the carbon isotopic composition of benthic foraminifera. The δ 13 C values of infaunal taxa are consistently lower than those of epifaunal taxa, suggesting that microhabitat effects on test composition do exist. The δ 13 C differences between foraminiferal carbonate and bottom water dissolved inorganic carbon are not correlated with the δ 18 O differences between benthic foraminifera tests and equilibrium calcite, but they do correlate with variations in the chemistry of sediment pore waters. However, interspecific δ 18 O differences as well as δ 13 C differences between species with similar vertical distributions in the sediments indicate that taxon‐specific “vital” effects also influence test composition.
Type of Medium:
Online Resource
ISSN:
0883-8305
,
1944-9186
DOI:
10.1029/PA005i002p00161
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
1990
detail.hit.zdb_id:
637876-6
detail.hit.zdb_id:
2015231-0
detail.hit.zdb_id:
2916554-4
SSG:
16,13
SSG:
13
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