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Romero, Oscar E; Hensen, Christian (2002): Biogenic opal and diatoms in surface sediments of the South Western Atlantic. PANGAEA, https://doi.org/10.1594/PANGAEA.80258, Supplement to: Romero, OE; Hensen, C (2002): Oceanographic control of biogenic opal and diatoms in surface sediments of the South Western Atlantic. Marine Geology, 186(3-4), 263-280, https://doi.org/10.1016/S0025-3227(02)00210-4

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Abstract:
Based on 66 surface sediment samples collected in the SW Atlantic Ocean between 27 and 50°S, this study presents an overview of the spatial distribution of biogenic opal and diatom concentrations, and diatom assemblages. Biogenic opal has highest values in the deepest, pelagic stations and decreases toward the slope. Diatoms closely follow the spatial trend of opal. Diatom assemblages reflect the present-day dominant hydrographical features. Antarctic diatoms are the main contributors to the preserved diatom community in core top sediments, with coastal planktonic and tropical/subtropical diatoms as secondary components. Dominance of Antarctic diatoms between 35 and 50°S in the pelagic realm mirrors the northward displacement of Antarctic-source water masses, characterized by high nutrient content and low salinity. Northward of ca. 35°S, the highest contribution of tropical/subtropical, pelagic diatoms, typical for nutrient-poor and high salinity waters, matches the main southward path of the Brazil Current. Mixing of Antarctic and tropical waters down up to 45°S is clearly illustrated by the diatom assemblage. Concentrations of biogenic opal and diatoms rather reflect the path of predominant water masses, but are less correlated with surface water productivity in the SW Atlantic.
Coverage:
Median Latitude: -36.143388 * Median Longitude: -50.606819 * South-bound Latitude: -48.911667 * West-bound Longitude: -60.093333 * North-bound Latitude: -28.714500 * East-bound Longitude: -38.170000
Date/Time Start: 1994-06-19T00:00:00 * Date/Time End: 1999-12-27T19:50:00
Minimum DEPTH, sediment/rock: m * Maximum DEPTH, sediment/rock: m
Event(s):
GeoB2703-7 * Latitude: -38.513333 * Longitude: -54.201667 * Date/Time: 1994-06-19T00:00:00 * Elevation: -1162.0 m * Recovery: 0.29 m * Location: Slope off Argentina * Campaign: M29/1 * Basis: Meteor (1986) * Device: MultiCorer (MUC)
GeoB2704-1 * Latitude: -38.925000 * Longitude: -53.928333 * Date/Time: 1994-06-20T00:00:00 * Elevation: -3247.0 m * Recovery: 0.2 m * Location: Slope off Argentina * Campaign: M29/1 * Basis: Meteor (1986) * Device: MultiCorer (MUC) * Comment: 6 large, 3 small tubes
GeoB2706-6 * Latitude: -42.368333 * Longitude: -55.535000 * Date/Time: 1994-06-21T00:00:00 * Elevation: -4700.0 m * Recovery: 0.2 m * Location: Slope off Argentina * Campaign: M29/1 * Basis: Meteor (1986) * Device: MultiCorer (MUC) * Comment: 6 large, 3 small tubes
Comment:
Diatom species (relative abundance, %)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5DEPTH, sediment/rockDepthmGeocode
6Diatoms, total abundance per unit sediment massTDA/sed106 #/gRomero, Oscar E
7Achnanthes brevipesA. brevipes%Romero, Oscar ECounting, diatoms
8Actinocyclus actinochilusA. actinochilus%Romero, Oscar ECounting, diatoms
9Actinocyclus curvatulusA. curvatulus%Romero, Oscar ECounting, diatoms
10Actinocyclus elongatusA. elongatus%Romero, Oscar ECounting, diatoms
11Actinocyclus exiguusA. exiguus%Romero, Oscar ECounting, diatoms
12Actinocyclus octonariusA. octonarius%Romero, Oscar ECounting, diatoms
13Actinocyclus subtilisA. subtilis%Romero, Oscar ECounting, diatoms
14Actinoptychus senariusA. senarius%Romero, Oscar ECounting, diatoms
15Actinoptychus vulgarisA. vulgaris%Romero, Oscar ECounting, diatoms
16Alveus marinusA. marinus%Romero, Oscar ECounting, diatoms
17Asterolampra marylandicaA. marylandica%Romero, Oscar ECounting, diatoms
18Asteromphalus arachneA. arachne%Romero, Oscar ECounting, diatoms
19Asteromphalus cleveanusA. cleveanus%Romero, Oscar ECounting, diatoms
20Asteromphalus flabellatusA. flabellatus%Romero, Oscar ECounting, diatoms
21Asteromphalus hookeriA. hookeri%Romero, Oscar ECounting, diatoms
22Asteromphalus parvulusA. parvulus%Romero, Oscar ECounting, diatoms
23Asteromphalus variabilisA. variabilis%Romero, Oscar ECounting, diatoms
24Aulacoseira granulataA. granulata%Romero, Oscar ECounting, diatoms
25Aulacoseira islandicaA. islandica%Romero, Oscar ECounting, diatoms
26Azpeitia africanaA. africana%Romero, Oscar ECounting, diatoms
27Azpeitia barroniiA. barronii%Romero, Oscar ECounting, diatoms
28Azpeitia neocrenulataA. neocrenulata%Romero, Oscar ECounting, diatoms
29Azpeitia noduliferaA. nodulifera%Romero, Oscar ECounting, diatoms
30Azpeitia tabularisA. tabularis%Romero, Oscar ECounting, diatoms
31Azpeitia tabularis var egregiusA. tabularis var. egregius%Romero, Oscar ECounting, diatoms
32Bacteriastrum elongatumB. elongatum%Romero, Oscar ECounting, diatoms
33Bacteriastrum sp.Bacteriastrum sp.%Romero, Oscar ECounting, diatoms
34Biddulphia alternansB. alternans%Romero, Oscar ECounting, diatoms
35Catenula pelagicaC. pelagica%Romero, Oscar ECounting, diatoms
36Chaetoceros decipiensC. decipiens%Romero, Oscar ECounting, diatoms
37Chaetoceros diademaC. diadema%Romero, Oscar ECounting, diatoms
38Chaetoceros lorenzianusC. lorenzianus%Romero, Oscar ECounting, diatoms
39Chaetoceros peruvianusC. peruvianus%Romero, Oscar ECounting, diatoms
40Chaetoceros affinis, resting sporesC. affinis rs%Romero, Oscar ECounting, diatoms
41Chaetoceros cinctus, resting sporesC. cinctus rs%Romero, Oscar ECounting, diatoms
42Chaetoceros compresus, resting sporesC. compresus rs%Romero, Oscar ECounting, diatoms
43Chaetoceros coronatus, resting sporesC. coronatus rs%Romero, Oscar ECounting, diatoms
44Chaetoceros debilis, resting sporesC. debilis rs%Romero, Oscar ECounting, diatoms
45Chaetoceros diadema, resting sporesC. diadema rs%Romero, Oscar ECounting, diatoms
46Chaetoceros didymus, resting sporesC. didymus rs%Romero, Oscar ECounting, diatoms
47Chaetoceros lorenzianus, resting sporesC. lorenzianus rs%Romero, Oscar ECounting, diatoms
48Chaetoceros radicans, resting sporesC. radicans rs%Romero, Oscar ECounting, diatoms
49Chaetoceros socialis, resting sporesC. socialis rs%Romero, Oscar ECounting, diatoms
50Chaetoceros vanheurckii, resting sporesC. vanheurckii rs%Romero, Oscar ECounting, diatoms
51Chaetoceros sp., resting sporesChaetoceros sp. rs%Romero, Oscar ECounting, diatomsChaetoceros sp. 1, resting spores
52Chaetoceros sp., resting sporesChaetoceros sp. rs%Romero, Oscar ECounting, diatomsChaetoceros sp. 2, resting spores
53Chaetoceros sp., resting sporesChaetoceros sp. rs%Romero, Oscar ECounting, diatomsChaetoceros sp. 4, resting spores
54Chaetoceros sp., resting sporesChaetoceros sp. rs%Romero, Oscar ECounting, diatomsChaetoceros sp. 5, resting spores
55Cocconeis britannicaC. britannica%Romero, Oscar ECounting, diatoms
56Cocconeis californicaC. californica%Romero, Oscar ECounting, diatoms
57Cocconeis diruptaC. dirupta%Romero, Oscar ECounting, diatoms
58Cocconeis pinnataC. pinnata%Romero, Oscar ECounting, diatoms
59Cocconeis placentulaC. placentula%Romero, Oscar ECounting, diatoms
60Cocconeis stauroneiformisC. stauroneiformis%Romero, Oscar ECounting, diatoms
61Coscinodiscus argusC. argus%Romero, Oscar ECounting, diatoms
62Coscinodiscus marginatusC. marginatus%Romero, Oscar ECounting, diatomsCoscinodiscus marginatus/radiatus
63Coscinodiscus oculus-iridisC. oculus-iridis%Romero, Oscar ECounting, diatoms
64Coscinodiscus radiatusC. radiatus%Romero, Oscar ECounting, diatoms
65Coscinodiscus thoriiC. thorii%Romero, Oscar ECounting, diatoms
66Cyclotella litoralisC. litoralis%Romero, Oscar ECounting, diatoms
67Cyclotella meneghinianaC. meneghiniana%Romero, Oscar ECounting, diatoms
68Cymatopleura marinaC. marina%Romero, Oscar ECounting, diatoms
69Cymbella sp.Cymbella sp.%Romero, Oscar ECounting, diatoms
70Delphineis surirellaD. surirella%Romero, Oscar ECounting, diatoms
71Denticula sp.Denticula sp.%Romero, Oscar ECounting, diatoms
72Detonula pumilaD. pumila%Romero, Oscar ECounting, diatoms
73Diploneis bombusD. bombus%Romero, Oscar ECounting, diatoms
74Diploneis didymaD. didyma%Romero, Oscar ECounting, diatoms
75Diploneis papula var. constrictaD. papula var. constricta%Romero, Oscar ECounting, diatoms
76Ditylum brightwelliiD. brightwellii%Romero, Oscar ECounting, diatoms
77Epithemia sp.Epithemia sp.%Romero, Oscar ECounting, diatoms
78Eucampia antarcticaE. antarctica%Romero, Oscar ECounting, diatoms
79Eunotia sp.Eunotia sp.%Romero, Oscar ECounting, diatoms
80Fragilariopsis curtaF. curta%Romero, Oscar ECounting, diatoms
81Fragilariopsis cylindrusF. cylindrus%Romero, Oscar ECounting, diatoms
82Fragilariopsis doliolusF. doliolus%Romero, Oscar ECounting, diatoms
83Fragilariopsis kerguelensisF. kerguelensis%Romero, Oscar ECounting, diatoms
84Fragilariopsis pseudonanaF. pseudonana%Romero, Oscar ECounting, diatoms
85Fragilariopsis ritscheriF. ritscheri%Romero, Oscar ECounting, diatoms
86Fragilariopsis separandaF. separanda%Romero, Oscar ECounting, diatoms
87Frustulia sp.Frustulia sp.%Romero, Oscar ECounting, diatoms
88Gomphonema sp.Gomphonema sp.%Romero, Oscar ECounting, diatoms
89Grammatophora sp.Grammatophora sp.%Romero, Oscar ECounting, diatoms
90Guinardia cylindrusG. cylindrus%Romero, Oscar ECounting, diatoms
91Hantzschia amphioxysH. amphioxys%Romero, Oscar ECounting, diatoms
92Hemidiscus cuneiformisH. cuneiformis%Romero, Oscar ECounting, diatoms
93Hyalodiscus scoticusH. scoticus%Romero, Oscar ECounting, diatoms
94Lioloma elongatumL. elongatum%Romero, Oscar ECounting, diatoms
95Lioloma pacificumL. pacificum%Romero, Oscar ECounting, diatoms
96Luticola muticaL. mutica%Romero, Oscar ECounting, diatoms
97Navicula distansN. distans%Romero, Oscar ECounting, diatoms
98Neidium sp.Neidium sp.%Romero, Oscar ECounting, diatoms
99Neodelphineis indicaN. indica%Romero, Oscar ECounting, diatoms
100Nitzschia aequatorialisN. aequatorialis%Romero, Oscar ECounting, diatoms
101Nitzschia bicapitataN. bicapitata%Romero, Oscar ECounting, diatoms
102Nitzschia braarudiiN. braarudii%Romero, Oscar ECounting, diatoms
103Nitzschia capuluspalaeN. capuluspalae%Romero, Oscar ECounting, diatoms
104Nitzschia interruptestriataN. interruptestriata%Romero, Oscar ECounting, diatoms
105Nitzschia kolaczeckiiN. kolaczeckii%Romero, Oscar ECounting, diatoms
106Nitzschia siculaN. sicula%Romero, Oscar ECounting, diatoms
107Nitzschia sicula sp.N. sicula sp.%Romero, Oscar ECounting, diatomsNitzschia sicula sp. 2
108Nitzschia sp. cf. siculaN. sp. cf. sicula%Romero, Oscar ECounting, diatoms
109Nitzschia sp.Nitzschia sp.%Romero, Oscar ECounting, diatomsNitzschia sp. 2
110Nitzschia sp.Nitzschia sp.%Romero, Oscar ECounting, diatomsNitzschia sp. 3
111Paralia sulcataP. sulcata%Romero, Oscar ECounting, diatoms
112Pinnularia borealisP. boralis%Romero, Oscar ECounting, diatoms
113Pinnularia sp.Pinnularia sp.%Romero, Oscar ECounting, diatomsPinnularia sp. 1
114Planktoniella solP. sol%Romero, Oscar ECounting, diatoms
115Pleurosigma directumP. directum%Romero, Oscar ECounting, diatoms
116Pleurosigma planctonicumP. planctonicum%Romero, Oscar ECounting, diatoms
117Pleurosigma sp.Pleurosigma sp.%Romero, Oscar ECounting, diatoms
118Porosira pseudodenticulataP. pseudodenticulata%Romero, Oscar ECounting, diatoms
119Proboscia alataP. alata%Romero, Oscar ECounting, diatoms
120Proboscia alata forma indicaP. alata f indica%Romero, Oscar ECounting, diatoms
121Psammodictyon panduriformeP. panduriforme%Romero, Oscar ECounting, diatoms
122Psammodictyon inflatula var. capitataP. inflatula var. capitata%Romero, Oscar ECounting, diatoms
123Psammodictyon pungensP. pungens%Romero, Oscar ECounting, diatoms
124Pseudosolenia calcar-avisP. calcar-avis%Romero, Oscar ECounting, diatoms
125Pseudostaurosira brevistriataP. brevistriata%Romero, Oscar ECounting, diatoms
126Pseudotriceratium punctatumP. punctatum%Romero, Oscar ECounting, diatoms
127Rhizosolenia acicularisR. acicularis%Romero, Oscar ECounting, diatoms
128Rhizosolenia acuminataR. acuminata%Romero, Oscar ECounting, diatoms
129Rhizosolenia antennata forma antennataR. antennata f antennata%Romero, Oscar ECounting, diatoms
130Rhizosolenia antennata forma semispinaR. antennata f semispina%Romero, Oscar ECounting, diatoms
131Rhizosolenia bergoniiR. bergonii%Romero, Oscar ECounting, diatoms
132Rhizosolenia borealisR. borealis%Romero, Oscar ECounting, diatoms
133Rhizosolenia cleveiR. clevei%Romero, Oscar ECounting, diatoms
134Rhizosolenia hebetata forma hebetataR. hebetata f hebetata%Romero, Oscar ECounting, diatoms
135Rhizosolenia ImbricataeR. Imbricatae%Romero, Oscar ECounting, diatoms
136Rhizosolenia pungensR. pungens%Romero, Oscar ECounting, diatoms
137Rhizosolenia robustaR. robusta%Romero, Oscar ECounting, diatoms
138Rhizosolenia setigeraR. setigera%Romero, Oscar ECounting, diatoms
139Rhizosolenia simaR. sima%Romero, Oscar ECounting, diatoms
140Rhizosolenia styliformisR. styliformis%Romero, Oscar ECounting, diatoms
141Roperia tessellataR. tessellata%Romero, Oscar ECounting, diatoms
142Skeletonema costatumS. costatum%Romero, Oscar ECounting, diatoms
143Stauroneis ancepsS. anceps%Romero, Oscar ECounting, diatoms
144Staurosirella lapponicaS. lapponica%Romero, Oscar ECounting, diatoms
145Stellarima microtriasS. microtrias%Romero, Oscar ECounting, diatoms
146Stephanodiscus astraeaS. astraea%Romero, Oscar ECounting, diatoms
147Surirella sp.Surirella sp.%Romero, Oscar ECounting, diatoms
148Thalassionema bacillareT. bacillare%Romero, Oscar ECounting, diatoms
149Thalassionema bacillare sp.T. bacillare sp.%Romero, Oscar ECounting, diatomsThalassionema bacillare sp. 2
150Thalassionema frauenfeldiiT. frauenfeldii%Romero, Oscar ECounting, diatoms
151Thalassionema nitzschioides var. nitzschioidesT. nitzschioides var. nitzschioides%Romero, Oscar ECounting, diatoms
152Thalassionema nitzschioides var. capitulataT. nitzschioides var. capitulata%Romero, Oscar ECounting, diatoms
153Thalassionema nitzschioides var. inflataT. nitzschioides var. inflata%Romero, Oscar ECounting, diatoms
154Thalassionema nitzschioides var. lanceolataT. nitzschioides var. lanceolata%Romero, Oscar ECounting, diatoms
155Thalassionema nitzschioides var. parvaT. nitzschioides var. parva%Romero, Oscar ECounting, diatoms
156Thalassiosira alleniiT. allenii%Romero, Oscar ECounting, diatoms
157Thalassiosira angulataT. angulata%Romero, Oscar ECounting, diatoms
158Thalassiosira anguste-lineataT. anguste-lineata%Romero, Oscar ECounting, diatoms
159Thalassiosira antarcticaT. antarctica%Romero, Oscar ECounting, diatomsThalassiosira antarctica (veget.)
160Thalassiosira antarcticaT. antarctica%Romero, Oscar ECounting, diatomsThalassiosira antarctica (spore)
161Thalassiosira bioculataT. bioculata%Romero, Oscar ECounting, diatoms
162Thalassiosira confertaT. conferta%Romero, Oscar ECounting, diatoms
163Thalassiosira eccentricaT. eccentrica%Romero, Oscar ECounting, diatoms
164Thalassiosira eccentrica patternT. eccentrica pattern%Romero, Oscar ECounting, diatoms
165Thalassiosira elsayediiT. elsayedii%Romero, Oscar ECounting, diatoms
166Thalassiosira endoseriataT. endoseriata%Romero, Oscar ECounting, diatoms
167Thalassiosira ferelineataT. ferelineata%Romero, Oscar ECounting, diatoms
168Thalassiosira frenguelliopsisT. frenguelliopsis%Romero, Oscar ECounting, diatoms
169Thalassiosira gerloffiiT. gerloffii%Romero, Oscar ECounting, diatoms
170Thalassiosira gracilisT. gracilis%Romero, Oscar ECounting, diatoms
171Thalassiosira gracilis var. expectaT. gracilis var. expecta%Romero, Oscar ECounting, diatoms
172Thalassiosira gravidaT. gravida%Romero, Oscar ECounting, diatoms
173Thalassiosira hendeyiT. hendeyi%Romero, Oscar ECounting, diatoms
174Thalassiosira lentiginosaT. lentiginosa%Romero, Oscar ECounting, diatoms
175Thalassiosira leptopusT. leptopus%Romero, Oscar ECounting, diatoms
176Thalassiosira lineataT. lineata%Romero, Oscar ECounting, diatoms
177Thalassiosira mendiolanaT. mendiolana%Romero, Oscar ECounting, diatoms
178Thalassiosira minimaT. minima%Romero, Oscar ECounting, diatomsincluding T. minuscula
179Thalassiosira nanolineataT. nanolineata%Romero, Oscar ECounting, diatoms
180Thalassiosira nodulineataT. nodulineata%Romero, Oscar ECounting, diatoms
181Thalassiosira oestrupii var. oestrupiiT. oestrupii var. oestrupii%Romero, Oscar ECounting, diatoms
182Thalassiosira oestrupii var. venrickaeT. oestrupii var. venrickae%Romero, Oscar ECounting, diatoms
183Thalassiosira pacificaT. pacifica%Romero, Oscar ECounting, diatoms
184Thalassiosira perpusillaT. perpusilla%Romero, Oscar ECounting, diatoms
185Thalassiosira plicataT. plicata%Romero, Oscar ECounting, diatoms
186Thalassiosira poroseriataT. poroseriata%Romero, Oscar ECounting, diatoms
187Thalassiosira poro-irregulataT. poro-irregulata%Romero, Oscar ECounting, diatoms
188Thalassiosira punctigeraT. punctigera%Romero, Oscar ECounting, diatoms
189Thalassiosira rotulaT. rotula%Romero, Oscar ECounting, diatoms
190Thalassiosira sackettii forma sackettiiT. sacketii f sacketii%Romero, Oscar ECounting, diatoms
191Thalassiosira sackettii forma planaT. sackettii f plana%Romero, Oscar ECounting, diatoms
192Thalassiosira subtilisT. subtilis%Romero, Oscar ECounting, diatoms
193Thalassiosira symmetricaT. symmetrica%Romero, Oscar ECounting, diatoms
194Thalassiosira trifultaT. trifulta%Romero, Oscar ECounting, diatoms
195Thalassiosira tumidaT. tumida%Romero, Oscar ECounting, diatoms
196Thalassiosira sp.Thalassiosira sp.%Romero, Oscar ECounting, diatomsThalassiosira sp. Z
197Thalassiothrix antarcticaT. antarctica%Romero, Oscar ECounting, diatoms
198Trachyneis asperaT. aspera%Romero, Oscar ECounting, diatoms
199Opal, biogenic silicabSiO2%Romero, Oscar ESequential leaching technique
Size:
11639 data points

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