Citation:

S0377-8398(97)00038-8

Name: Size-related isotopic trends in Maastrichtian planktic foraminifera of DSDP Core 44-390A (Appendix B)
Published: 1998
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Stable isotope analyses were performed on ontogenetic dissections of four taxa of low latitude Late Cretaceous planktonic foraminifera from DSDP Hole 390A. The species studied include Planoglobulina acervulinoides, Planoglobulina multicamerata, Pseudoguembelina palpebra, and Racemiguembelina fructicosa. Delta18O and delta13C data indicate a deeper surface water paleohabitat for P. multicamerata than the other three taxa, and ontogenetic increases in delta18O values suggest all these taxa underwent vertical migrations from shallow to deeper surface waters. Changes in delta13C values through ontogeny include sharp increases in delta13C composition in the juvenile size intervals, a decrease in the rate of delta13C change through intermediate size intervals, and reversals to a negative trend in delta13C values in terminal size intervals. The intermediate and terminal growth changes in delta13C signals are similar to ontogenetic trends observed in some extant and Paleogene planktonic foraminifera and may result from decreasing metabolic rates through ontogeny or endosymbiont digestion prior to gametogenesis. The ontogenetic delta13C increases of 1.04‰, 0.76‰, 0.83‰, and 0.77‰ in R. fructicosa, P. palpebra, P. acervulinoides, and P. multicamerata, respectively, may indicate the presence of photosymbionts. However, our review and critique of the current literature discussing photosymbiont effects on stable isotope values in living and fossil planktonic foraminifera suggests that conclusions regarding the presence of photosymbionts in fossil taxa may be more equivocal than previously thought.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Latitude: 30.142300 * Longitude: -76.112300

Date/Time Start: 1975-08-29T00:00:00 * Date/Time End: 1975-08-29T00:00:00

Minimum DEPTH, sediment/rock: 121.11 m * Maximum DEPTH, sediment/rock: 121.11 m

Event(s):

44-390A * Latitude: 30.142300 * Longitude: -76.112300 * Date/Time: 1975-08-29T00:00:00 * Elevation: -2665.0 m * Penetration: 142.5 m * Recovery: 86.3 m * Location: North Atlantic * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 133 m cored; 0 m drilled; 64.9 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	Sample code/label	Sample label		Chapman, Mark R	DSDP/ODP/IODP sample designation
3	Sample comment	Sample comment		Chapman, Mark R
4	Size fraction	Size fraction		Chapman, Mark R
5	Mass	Mass	µg	Chapman, Mark R
6	Specimen count	Sp count	#	Chapman, Mark R
7	Racemiguembelina fructicosa, δ13C	R. fructicosa δ13C	‰ PDB	Chapman, Mark R	Isotope ratio mass spectrometry
8	Racemiguembelina fructicosa, δ18O	R. fructicosa δ18O	‰ PDB	Chapman, Mark R	Isotope ratio mass spectrometry
9	Pseudoguembelina palpebra, δ13C	P. palpebra δ13C	‰ PDB	Chapman, Mark R	Isotope ratio mass spectrometry
10	Pseudoguembelina palpebra, δ18O	P. palpebra δ18O	‰ PDB	Chapman, Mark R	Isotope ratio mass spectrometry
11	Planoglobulina acervulinoides, δ13C	P. acervulinoides δ13C	‰ PDB	Chapman, Mark R	Isotope ratio mass spectrometry
12	Planoglobulina acervulinoides, δ18O	P. acervulinoides δ18O	‰ PDB	Chapman, Mark R	Isotope ratio mass spectrometry
13	Planoglobulina multicamerata, δ13C	P. multicamerata δ13C	‰ PDB	Chapman, Mark R	Isotope ratio mass spectrometry
14	Planoglobulina multicamerata, δ18O	P. multicamerata δ18O	‰ PDB	Chapman, Mark R	Isotope ratio mass spectrometry

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

189 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Depth sed [m]	2 Sample label	3 Sample comment	4 Size fraction	5 Mass [µg]	6 Sp count [#]	7 R. fructicosa δ13C [‰ PDB]	8 R. fructicosa δ18O [‰ PDB]	9 P. palpebra δ13C [‰ PDB]	10 P. palpebra δ18O [‰ PDB]	11 P. acervulinoides δ13C [‰ PDB]	12 P. acervulinoides δ18O [‰ PDB]	13 P. multicamerata δ13C [‰ PDB]	14 P. multicamerata δ18O [‰ PDB]
121.11	44-390A-12-5,111-113		700-750 µm	51	6	3.11	-1.05
121.11	44-390A-12-5,111-113		650-700 µm	66	9	3.17	-0.85
121.11	44-390A-12-5,111-113		600-650 µm	72	11	3.33	-1.02
121.11	44-390A-12-5,111-113		550-600 µm	79	10	3.53	-1.16
121.11	44-390A-12-5,111-113		500-550 µm	45	9	3.94	-1.20
121.11	44-390A-12-5,111-113		450-500 µm	130	17	3.85	-1.43
121.11	44-390A-12-5,111-113		400-450 µm	68	10	3.70	-1.43
121.11	44-390A-12-5,111-113		350-400 µm	70	12	3.61	-1.50
121.11	44-390A-12-5,111-113		300-350 µm	19	4	3.72	-1.38
121.11	44-390A-12-5,111-113		<300 µm	148	25	2.90	-1.38
121.11	44-390A-12-5,111-113	size fraction 650-700 (1 specimens, 1 µg), 600-650 (1 specimens, 1 µg) and 550-600 µm (7 specimens +1 dissected, 13 µg) combined	550-700 µm	15	9			2.70	-1.22
121.11	44-390A-12-5,111-113	+2 specimens dissected	500-550 µm	11	11			2.86	-1.15
121.11	44-390A-12-5,111-113	+1 specimen dissected	450-500 µm	25	11			2.85	-1.32
121.11	44-390A-12-5,111-113	+3 specimens dissected	400-450 µm	24	17			2.69	-1.31
121.11	44-390A-12-5,111-113	+2 specimens dissected	300-350 µm	42	18			2.65	-1.57
121.11	44-390A-12-5,111-113	+3 specimens dissected	<300 µm	152	28			2.10	-1.77
121.11	44-390A-12-5,111-113	size fraction 650-700 (2 specimens, 14 µg) and 600-650 (4 specimens, 16 µg) combined	600-700 µm	30	6					3.04	-1.11
121.11	44-390A-12-5,111-113	size fraction 500-550 (5 specimens, 33 µg) and 450-500 (5 specimens + 1 specimen dissected, 15 µg) combined	450-550 µm	48	10					3.28	-1.47
121.11	44-390A-12-5,111-113		350-400 µm	20	3					3.26	-1.49
121.11	44-390A-12-5,111-113		300-350 µm	13	3					2.88	-1.44
121.11	44-390A-12-5,111-113		<300 µm	67	10					2.45	-1.74
121.11	44-390A-12-5,111-113	size fraction >800 (1 specimens, 5 µg) and 700-750 (2 specimens, 8 µg) combined	>750 µm	13	3							1.86	-0.96
121.11	44-390A-12-5,111-113		600-650 µm	27	11							1.90	-0.72
121.11	44-390A-12-5,111-113		550-600 µm	30	7							1.82	-0.72
121.11	44-390A-12-5,111-113		500-550 µm	36	16							1.63	-0.77
121.11	44-390A-12-5,111-113		450-500 µm	26	10							1.73	-0.81
121.11	44-390A-12-5,111-113		400-450 µm	33	17							1.60	-0.77
121.11	44-390A-12-5,111-113		350-400 µm	18	13							1.50	-0.90
121.11	44-390A-12-5,111-113		300-350 µm	28	12							1.73	-1.03
121.11	44-390A-12-5,111-113		<300 µm	181	29							1.13	-1.11