Citation:

S0031-0182(01)00368-6

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Abstract:

Large numbers of calcareous dinoflagellate cysts and the vegetative calcareous coccoid species Thoracosphaera heimii are generally found in sediments underlying oligotrophic and/or stratified (sub)surface water environments. It is difficult to distinguish between the relative importance of these two environmental parameters on calcareous cyst and T. heimii distribution as they usually covary, but this information is essential if we want to apply cysts properly in the reconstruction of palaeoenvironments and past surface water hydrography. In the multi-proxy core GeoB 1523-1 from the Ceará Rise region in the western equatorial Atlantic Ocean (covering the past 155 ka), periods of greatest oligotrophy are not synchronous with periods of greatest stratification (Rühlemann et al., 1996, doi:10.1016/S0025-3227(96)00048-5; Mulitza et al., 1997, doi:10.1130/0091-7613(1997)025<0335:PFAROP>2.3.CO;2; 335-338; Mulitza et al., 1998, doi:10.1016/S0012-821X(98)00012-0), giving us the unique opportunity to differentiate between the effects of both parameters on cyst accumulation. The calcareous cyst record of the core reflects prominent increases in accumulation rate of nearly all observed species only during the nutrient-enriched but more stratified isotopic (sub)stages 5.5, 5.3, 5.1 and 1. In this respect, the distribution trends in the core are more similar to those of the eastern equatorial upwelling region (GeoB 1105-4) than they are to those of the oligotrophic north-eastern Brazilian continental slope (GeoB 2204-2), even though temporal changes in bioproductivity are principally in antiphase between the eastern and western equatorial regions. We conclude that stratification of the upper water column and the presence of a well-developed thermocline are probably the more important factors controlling cyst distribution in the equatorial Atlantic, whereas the state of oligotrophy secondarily influences cyst production within a well-stratified environment.

Related to:

Vink, Annemiek (2000): Reconstruction of recent and late Quaternary surface water masses of the western subtropical Atlantic Ocean based on calcareous and organic-walled dinoflagellate cysts. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 159, 160 pp, urn:nbn:de:gbv:46-ep000102797

Project(s):

Geosciences, University of Bremen (GeoB)

Coverage:

Latitude: 3.831667 * Longitude: -41.621667

Date/Time Start: 1991-05-17T00:00:00 * Date/Time End: 1991-05-17T00:00:00

Minimum DEPTH, sediment/rock: 0.03 m * Maximum DEPTH, sediment/rock: 3.98 m

Event(s):

GeoB1523-1 * Latitude: 3.831667 * Longitude: -41.621667 * Date/Time: 1991-05-17T00:00:00 * Elevation: -3292.0 m * Recovery: 6.65 m * Location: Amazon Fan * Campaign: * Basis: * Method/Device: Gravity corer (Kiel type) (SL)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m			Geocode
2	Thoracosphaera heimii	T. heimii	#	Willems, Helmut	Counting, dinoflagellate cysts	size > 20 µm
3	Thoracosphaera heimii	T. heimii	#	Willems, Helmut	Counting, dinoflagellate cysts	size < 20 µm
4	Pernambugia tuberosa	P. tuberosa	#	Willems, Helmut	Counting, dinoflagellate cysts	size > 20 µm
5	Pernambugia tuberosa	P. tuberosa	#	Willems, Helmut	Counting, dinoflagellate cysts	size < 20 µm
6	Calciodinellum levantinum	C. levantinum	#	Willems, Helmut	Counting, dinoflagellate cysts	size > 20 µm
7	Calciodinellum levantinum	C. levantinum	#	Willems, Helmut	Counting, dinoflagellate cysts	size > 20 µm, species 3
8	Calciodinellum levantinum	C. levantinum	#	Willems, Helmut	Counting, dinoflagellate cysts	size < 20 µm
9	Calciodinellum levantinum	C. levantinum	#	Willems, Helmut	Counting, dinoflagellate cysts	size < 20 µm, species 3
10	Calciodinellum albatrosianum	C. albatrosianum	#	Willems, Helmut	Counting, dinoflagellate cysts	size > 20 µm
11	Calciodinellum albatrosianum	C. albatrosianum	#	Willems, Helmut	Counting, dinoflagellate cysts	size < 20 µm
12	Leonella granifera	L. granifera	#	Willems, Helmut	Counting, dinoflagellate cysts	size > 20 µm
13	Leonella granifera	L. granifera	#	Willems, Helmut	Counting, dinoflagellate cysts	size < 20 µm
14	Scrippsiella regalis	S. regalis	#	Willems, Helmut	Counting, dinoflagellate cysts	size > 20 µm
15	Scrippsiella regalis	S. regalis	#	Willems, Helmut	Counting, dinoflagellate cysts	size < 20 µm
16	Sample mass	Samp m	g	Willems, Helmut		size > 20 µm
17	Sample mass	Samp m	g	Willems, Helmut		size < 20 µm
18	Sample volume	Samp vol	l	Willems, Helmut		size > 20 µm
19	Sample volume	Samp vol	l	Willems, Helmut		size < 20 µm
20	Slide volume	slide vol	ml	Willems, Helmut	see reference(s)	size > 20 µm
21	Slide volume	slide vol	ml	Willems, Helmut	see reference(s)	size < 20 µm

License:

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

Size:

1120 data points

Data

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

1 Depth sed [m]	2 T. heimii [#] (size > 20 µm, Counting, dinof...)	3 T. heimii [#] (size < 20 µm, Counting, dinof...)	4 P. tuberosa [#] (size > 20 µm, Counting, dinof...)	5 P. tuberosa [#] (size < 20 µm, Counting, dinof...)	6 C. levantinum [#] (size > 20 µm, Counting, dinof...)	7 C. levantinum [#] (size > 20 µm, species 3, Coun...)	8 C. levantinum [#] (size < 20 µm, Counting, dinof...)	9 C. levantinum [#] (size < 20 µm, species 3, Coun...)	10 C. albatrosianum [#] (size > 20 µm, Counting, dinof...)	11 C. albatrosianum [#] (size < 20 µm, Counting, dinof...)	12 L. granifera [#] (size > 20 µm, Counting, dinof...)	13 L. granifera [#] (size < 20 µm, Counting, dinof...)	14 S. regalis [#] (size > 20 µm, Counting, dinof...)	15 S. regalis [#] (size < 20 µm, Counting, dinof...)	16 Samp m [g] (size > 20 µm)	17 Samp m [g] (size < 20 µm)	18 Samp vol [l] (size > 20 µm)	19 Samp vol [l] (size < 20 µm)	20 slide vol [ml] (size > 20 µm, see reference(s))	21 slide vol [ml] (size < 20 µm, see reference(s))
0.03	168	1648	42	2	104	4	2	0	536	4	13	22	0	0	0.400	0.400	0.015	0.100	0.05	0.10
0.08	630	2096	78	5	181	1	6	0	696	10	17	16	1	0	0.400	0.400	0.015	0.100	0.05	0.10
0.13	124	2836	62	8	272	0	16	0	634	11	6	31	0	0	0.400	0.400	0.015	0.100	0.05	0.10
0.18	35	1981	18	3	134	2	10	0	339	10	4	24	0	0	0.300	0.300	0.015	0.100	0.05	0.10
0.23	134	1704	18	2	166	1	6	0	428	8	14	7	0	0	0.400	0.400	0.015	0.100	0.05	0.10
0.28	148	837	12	0	91	1	1	0	294	2	43	0	0	0	0.401	0.401	0.015	0.100	0.05	0.10
0.33	770	1429	15	0	118	1	4	0	367	6	61	2	3	0	0.401	0.401	0.015	0.100	0.05	0.10
0.38	78	234	17	0	36	2	0	0	312	0	10	0	3	0	0.400	0.400	0.015	0.100	0.05	0.10
0.43	73	259	15	0	47	1	0	0	250	0	16	2	4	0	0.400	0.400	0.015	0.100	0.05	0.10
0.48	93	866	14	1	46	1	4	1	152	4	0	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
0.53	314	148	24	0	70	2	0	0	154	0	0	0	2	0	0.400	0.400	0.015	0.100	0.05	0.10
0.58	196	62	18	0	62	5	0	0	97	0	4	0	4	0	0.400	0.400	0.015	0.100	0.05	0.10
0.68	156	144	14	0	67	4	0	0	78	0	1	1	1	0	0.400	0.400	0.015	0.100	0.05	0.10
0.78	8	84	2	0	18	4	0	0	56	0	0	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
0.88	18	666	4	0	32	2	6	0	84	2	0	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
0.98	16	442	6	0	34	2	2	0	63	1	0	0	1	0	0.400	0.400	0.015	0.100	0.05	0.10
1.08	13	568	4	2	21	2	0	0	71	2	0	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
1.18	16	438	6	2	18	3	0	0	92	2	1	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
1.28	8	1016	4	0	18	4	2	0	114	4	2	1	0	0	0.400	0.400	0.015	0.100	0.05	0.10
1.38	13	572	3	0	22	2	0	0	102	2	3	1	1	0	0.400	0.400	0.015	0.100	0.05	0.10
1.48	20	561	4	0	45	6	0	0	98	0	0	1	0	0	0.400	0.400	0.015	0.100	0.05	0.10
1.58	6	372	6	2	25	6	2	0	76	0	1	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
1.68	66	70	51	0	60	2	1	1	46	2	1	1	2	0	0.400	0.400	0.015	0.100	0.05	0.10
1.78	9	128	15	0	34	2	0	0	64	0	1	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
1.88	86	52	25	0	28	10	0	0	80	0	0	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
1.98	18	410	6	0	28	2	0	0	106	1	1	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
2.08	245	1368	19	0	52	1	2	0	164	2	4	3	0	0	0.400	0.400	0.015	0.100	0.05	0.10
2.18	114	519	10	2	30	2	0	0	159	2	5	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
2.28	150	399	6	0	10	2	0	0	156	2	3	0	1	0	0.400	0.400	0.015	0.100	0.05	0.10
2.38	98	789	8	0	10	0	0	0	212	0	0	0	1	0	0.400	0.400	0.015	0.100	0.05	0.10
2.48	21	279	4	0	10	1	0	0	210	0	0	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
2.58	201	784	9	1	32	0	0	1	344	2	1	1	0	0	0.400	0.400	0.015	0.100	0.05	0.10
2.68	122	1534	12	1	68	2	0	0	260	2	0	3	0	0	0.400	0.400	0.015	0.100	0.05	0.10
2.78	42	142	5	0	54	1	0	0	210	4	2	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
2.88	10	110	1	0	22	0	0	0	110	0	1	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
2.98	10	232	4	0	14	1	0	0	147	2	3	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
3.03	17	578	2	0	5	0	0	0	202	2	2	5	0	0	0.400	0.400	0.015	0.100	0.05	0.10
3.08	155	1150	4	0	11	2	1	0	462	6	7	5	0	0	0.400	0.400	0.015	0.100	0.05	0.10
3.13	150	3012	7	2	53	1	4	0	793	20	9	48	2	0	0.401	0.401	0.015	0.100	0.05	0.10
3.18	71	2478	1	0	38	1	2	0	480	19	9	35	0	0	0.400	0.400	0.015	0.100	0.05	0.10
3.23	118	1572	4	0	48	4	0	0	380	3	16	7	1	0	0.400	0.400	0.015	0.100	0.05	0.10
3.28	48	1474	1	0	59	2	1	0	330	4	15	17	0	0	0.400	0.400	0.015	0.100	0.05	0.10
3.33	33	476	2	0	30	2	0	0	198	1	24	0	2	0	0.400	0.400	0.015	0.100	0.05	0.10
3.38	126	1447	3	1	38	4	0	0	260	4	1	4	2	0	0.400	0.400	0.015	0.100	0.05	0.10
3.43	32	386	2	0	14	1	0	0	112	4	1	0	0	1	0.400	0.400	0.015	0.100	0.05	0.10
3.48	32	183	0	0	8	2	1	0	117	1	1	1	0	0	0.400	0.400	0.015	0.100	0.05	0.10
3.53	62	294	4	0	18	2	1	0	118	0	0	0	1	0	0.400	0.400	0.015	0.100	0.05	0.10
3.58	68	1392	0	0	24	0	2	0	142	2	0	1	1	0	0.400	0.400	0.015	0.100	0.05	0.10
3.63	42	100	2	0	15	0	0	0	146	1	0	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
3.68	74	804	1	0	19	2	1	0	136	0	0	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
3.73	208	202	1	0	50	1	0	0	174	0	4	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
3.78	38	164	6	0	40	2	0	0	168	1	0	0	1	0	0.400	0.400	0.015	0.100	0.05	0.10
3.83	41	36	2	0	45	2	0	0	230	0	0	0	1	0	0.400	0.400	0.015	0.100	0.05	0.10
3.88	26	12	6	0	38	2	0	0	208	0	0	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10
3.93	263	62	6	0	59	10	0	0	240	1	2	0	2	0	0.400	0.400	0.015	0.100	0.05	0.10
3.98	20	154	0	0	13	8	0	0	132	0	1	0	0	0	0.400	0.400	0.015	0.100	0.05	0.10