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Romero, Oscar E; Hebbeln, Dierk (2003): Surface data of the Peru-Chile Current, relative abundance of diatoms. PANGAEA, https://doi.org/10.1594/PANGAEA.80222, Supplement to: Romero, OE; Hebbeln, D (2003): Biogenic silica and diatom thanatocoenosis in surface sediments below the Peru-Chile Current: controlling mechanisms and relationship with productivity of surface waters. Marine Micropaleontology, 48(1-2), 71-90, https://doi.org/10.1016/S0377-8398(02)00161-5

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Abstract:
Based on 76 surface sediment samples collected between ca. 22° and 44°S along the Chilean coast in the southeast Pacific Ocean, we report on the north-south distribution of opal content and diatom concentration, and the quantitative and qualitative composition of the preserved diatom community. Latitudinal differences in the siliceous signal reflect the influence of two main mechanisms of surface water production: coastal upwelling off northern and central Chile till ca. 38°S, and nutrient enrichment by the input of cold, southern, non-upwelling-associated waters south of ca. 38°S. The poleward increase in biogenic opal and diatom values parallels well the north-south increase of pigment concentration in surface waters as recorded by satellites. Between 22° and 33°S, where low pigment concentrations are measured, opal content and diatom concentration are mostly low (except at 22°-23°S). In contrast, both higher opal and diatom values at 34°-38°S and 41°-42°S correspond well with higher pigment estimations. Preserved diatom populations document the present-day dominant hydrographical conditions. Nutrient enrichment of surface waters due to coastal upwelling results in intensive production of diatoms off northern and central Chile, reflected by the predominance of the richly-composed association of Chaetoceros spores north of ca. 38°S. The diatom association shows that the area between 35° and 38°S is transitional. The abrupt decrease of Chaetoceros spores south of not, vert, similar38°S off Chile coupled with the enhanced contribution of Thalassiosira spp., representatives of high-productivity, low-temperature waters, points to the presumed high nutrient supply by the iron-limited, nutrient-rich Antarctic Circumpolar Water. The contribution of benthic diatoms reflects some lateral transport from the near-shore area into deeper positions south of 38°S.
Coverage:
Median Latitude: -34.466927 * Median Longitude: -72.976096 * South-bound Latitude: -44.283330 * West-bound Longitude: -75.592500 * North-bound Latitude: -22.800330 * East-bound Longitude: -70.541330
Date/Time Start: 1995-04-26T00:00:00 * Date/Time End: 2001-05-12T09:13:00
Minimum DEPTH, sediment/rock: m * Maximum DEPTH, sediment/rock: m
Event(s):
GeoB3303-1 (SO101/3_3-1) * Latitude: -33.206667 * Longitude: -72.175000 * Date/Time: 1995-04-26T00:00:00 * Elevation: -1983.0 m * Recovery: 0.27 m * Location: South-East Pacific * Campaign: SO101 (CONDOR-Ia) * Basis: Sonne * Device: MultiCorer (MUC) * Comment: core recovery 8/8, 4/4
GeoB3311-2 * Latitude: -33.606667 * Longitude: -72.046667 * Date/Time: 1995-05-06T00:00:00 * Elevation: -471.0 m * Recovery: 0.08 m * Location: South-East Pacific * Campaign: SO101 (CONDOR-Ia) * Basis: Sonne * Device: MultiCorer (MUC) * Comment: core recovery 0/8, 4/44
GeoB3312-2 * Latitude: -41.008333 * Longitude: -74.336667 * Date/Time: 1995-05-11T00:00:00 * Elevation: -584.0 m * Location: South-East Pacific * Campaign: SO102/1 (CHIPAL) * Basis: Sonne * Device: MultiCorer (MUC)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5DEPTH, sediment/rockDepthmGeocode
6Achnanthes sp.Achnanthes sp.%Romero, Oscar ECounting, diatoms
7Actinocyclus curvatulusA. curvatulus%Romero, Oscar ECounting, diatoms
8Actinocyclus exiguusA. exiguus%Romero, Oscar ECounting, diatoms
9Actinocyclus octonariusA. octonarius%Romero, Oscar ECounting, diatoms
10Actinoptychus senariusA. senarius%Romero, Oscar ECounting, diatoms
11Actinoptychus vulgarisA. vulgaris%Romero, Oscar ECounting, diatoms
12Adoneis pacificaA. pacifica%Romero, Oscar ECounting, diatoms
13Amphora ostreariaA. ostrearia%Romero, Oscar ECounting, diatoms
14Amphora sp.Amphora sp.%Romero, Oscar ECounting, diatoms
15Asteromphalus arachneA. arachne%Romero, Oscar ECounting, diatoms
16Asteromphalus flabellatusA. flabellatus%Romero, Oscar ECounting, diatoms
17Asteromphalus heptactisA. heptactis%Romero, Oscar ECounting, diatoms
18Asteromphalus hyalinusA. hyalinus%Romero, Oscar ECounting, diatoms
19Asteromphalus sarcophagusA. sarcophagus%Romero, Oscar ECounting, diatoms
20Aulacoseira granulataA. granulata%Romero, Oscar ECounting, diatoms
21Aulacoseira islandicaA. islandica%Romero, Oscar ECounting, diatoms
22Azpeitia africanaA. africana%Romero, Oscar ECounting, diatoms
23Azpeitia barroniiA. barronii%Romero, Oscar ECounting, diatoms
24Azpeitia neocrenulataA. neocrenulata%Romero, Oscar ECounting, diatoms
25Azpeitia noduliferaA. nodulifera%Romero, Oscar ECounting, diatoms
26Azpeitia tabularisA. tabularis%Romero, Oscar ECounting, diatoms
27Bacteriastrum elongatumB. elongatum%Romero, Oscar ECounting, diatoms
28Bacteriastrum furcatumB. furcatum%Romero, Oscar ECounting, diatoms
29Bacteriastrum hyalinumB. hyalinum%Romero, Oscar ECounting, diatoms
30Biddulphia alternansB. alternans%Romero, Oscar ECounting, diatoms
31Catacombas gailloniC. gailloni%Romero, Oscar ECounting, diatoms
32Chaetoceros affinisC. affinis%Romero, Oscar ECounting, diatoms
33Chaetoceros bacteriastroidesC. bacteriastroides%Romero, Oscar ECounting, diatomsone celled
34Chaetoceros concavicornisC. concavicornis%Romero, Oscar ECounting, diatoms
35Chaetoceros decipiensC. decipiens%Romero, Oscar ECounting, diatoms
36Chaetoceros diademaC. diadema%Romero, Oscar ECounting, diatoms
37Chaetoceros didymusC. didymus%Romero, Oscar ECounting, diatoms
38Chaetoceros didymus var. protuberansC. didymus var. protuberans%Romero, Oscar ECounting, diatoms
39Chaetoceros messanensisC. messanensis%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 constrictus, resting sporesC. constrictus rs%Romero, Oscar ECounting, diatoms
44Chaetoceros coronatus, resting sporesC. coronatus rs%Romero, Oscar ECounting, diatoms
45Chaetoceros debilis, resting sporesC. debilis rs%Romero, Oscar ECounting, diatoms
46Chaetoceros diadema, resting sporesC. diadema rs%Romero, Oscar ECounting, diatoms
47Chaetoceros didymus, resting sporesC. didymus rs%Romero, Oscar ECounting, diatoms
48Chaetoceros lorenzianus, resting sporesC. lorenzianus rs%Romero, Oscar ECounting, diatoms
49Chaetoceros radicans, resting sporesC. radicans rs%Romero, Oscar ECounting, diatoms
50Chaetoceros socialis, resting sporesC. socialis rs%Romero, Oscar ECounting, diatoms
51Chaetoceros vanheurckii, resting sporesC. vanheurckii rs%Romero, Oscar ECounting, diatoms
52Chaetoceros sp., resting sporesChaetoceros sp. rs%Romero, Oscar ECounting, diatomsChaetoceros sp. 1, resting spores
53Chaetoceros sp., resting sporesChaetoceros sp. rs%Romero, Oscar ECounting, diatomsChaetoceros sp. 2, resting spores
54Chaetoceros sp., resting sporesChaetoceros sp. rs%Romero, Oscar ECounting, diatomsChaetoceros sp. 4, resting spores
55Chaetoceros sp., resting sporesChaetoceros sp. rs%Romero, Oscar ECounting, diatomsChaetoceros sp. 5, resting spores
56Cocconeis britannicaC. britannica%Romero, Oscar ECounting, diatoms
57Cocconeis californica var. lenganaC. californica var. lengana%Romero, Oscar ECounting, diatoms
58Cocconeis costata var. costataC. costata var. costata%Romero, Oscar ECounting, diatoms
59Cocconeis costata var. hexagonaC. costata var. hexagona%Romero, Oscar ECounting, diatoms
60Cocconeis decipiensC. decipiens%Romero, Oscar ECounting, diatoms
61Cocconeis diruptaC. dirupta%Romero, Oscar ECounting, diatoms
62Cocconeis peltaC. pelta%Romero, Oscar ECounting, diatoms
63Cocconeis placentulaC. placentula%Romero, Oscar ECounting, diatoms
64Cocconeis pseudomarginataC. pseudomarginata%Romero, Oscar ECounting, diatoms
65Cocconeis speciosaC. speciosa%Romero, Oscar ECounting, diatoms
66Cocconeis stauroneiformisC. stauroneiformis%Romero, Oscar ECounting, diatoms
67Corethron sp.Corethron sp.%Romero, Oscar ECounting, diatoms
68Coscinodiscus argusC. argus%Romero, Oscar ECounting, diatoms
69Coscinodiscus centralisC. centralis%Romero, Oscar ECounting, diatoms
70Coscinodiscus janischiiC. janischii%Romero, Oscar ECounting, diatoms
71Coscinodiscus coculus-iridisC. coculus-iridis%Romero, Oscar ECounting, diatoms
72Coscinodiscus radiatusC. radiatus%Romero, Oscar ECounting, diatoms
73Coscinodiscus thoriiC. thorii%Romero, Oscar ECounting, diatoms
74Ctenophora sp.Ctenophora sp.%Romero, Oscar ECounting, diatoms
75Cyclophora sp.Cyclophora sp.%Romero, Oscar ECounting, diatoms
76Cyclotella litoralisC. litoralis%Romero, Oscar ECounting, diatoms
77Cyclotella meneghinianaC. meneghiniana%Romero, Oscar ECounting, diatoms
78Cyclotella stelligeraC. stelligera%Romero, Oscar ECounting, diatoms
79Cymbella sp.Cymbella sp.%Romero, Oscar ECounting, diatoms
80Delphineis surirellaD. surirella%Romero, Oscar ECounting, diatoms
81Denticula sp.Denticula sp.%Romero, Oscar ECounting, diatoms
82Diatoma sp.Diatoma sp.%Romero, Oscar ECounting, diatoms
83Diploneis bombusD. bombus%Romero, Oscar ECounting, diatoms
84Diploneis constrictaD. constricta%Romero, Oscar ECounting, diatoms
85Dytilum brightwelli, resting sporesD. brightwelli rs%Romero, Oscar ECounting, diatoms
86Epithemia sp.Epithemia sp.%Romero, Oscar ECounting, diatoms
87Eunotia sp.Eunotia sp.%Romero, Oscar ECounting, diatoms
88Fallacia nyellaF. nyella%Romero, Oscar ECounting, diatoms
89Fragilariopsis doliolusF. doliolus%Romero, Oscar ECounting, diatoms
90Gomphonema sp.Gomphonema sp.%Romero, Oscar ECounting, diatoms
91Grammatophora marinaG. marina%Romero, Oscar ECounting, diatoms
92Hannaea sp.Hannaea sp.%Romero, Oscar ECounting, diatoms
93Hantzschia amphyoxisH. amphyoxis%Romero, Oscar ECounting, diatoms
94Haslea hyalinissimaH. hyalinissima%Romero, Oscar ECounting, diatoms
95Hemialus sinensisH. sinensis%Romero, Oscar ECounting, diatoms
96Hemidiscus cuneiformisH. cuneiformis%Romero, Oscar ECounting, diatoms
97Leptocylindrus mediterraneusL. mediterraneus%Romero, Oscar ECounting, diatoms
98Lioloma elongatumL. elongatum%Romero, Oscar ECounting, diatoms
99Luticola muticaL. mutica%Romero, Oscar ECounting, diatoms
100Mastogloia rostrataM. rostrata%Romero, Oscar ECounting, diatoms
101Navicula cryptotenellaN. cryptotenella%Romero, Oscar ECounting, diatoms
102Navicula distansN. distans%Romero, Oscar ECounting, diatoms
103Navicula sp.Navicula sp.%Romero, Oscar ECounting, diatomsNavicula sp. 1
104Navicula sp.Navicula sp.%Romero, Oscar ECounting, diatomsNavicula sp. 2
105Neidium sp.Neidium sp.%Romero, Oscar ECounting, diatoms
106Nitzschia bicapitataN. bicapitata%Romero, Oscar ECounting, diatoms
107Nitzschia interruptestriataN. interruptestriata%Romero, Oscar ECounting, diatoms
108Nitzschia siculaN. sicula%Romero, Oscar ECounting, diatoms
109Nitzschia sp. Nitzschia cf. siculaN. sp. Nitzschia cf. sicula%Romero, Oscar ECounting, diatoms
110Nitzschia sp.Nitzschia sp.%Romero, Oscar ECounting, diatomsNitzschia sp. 2
111Nitzschia sp.Nitzschia sp.%Romero, Oscar ECounting, diatomsNitzschia sp. 3
112Odontella longicrurisO. longicruris%Romero, Oscar ECounting, diatoms
113Opephora sp.Opephora sp.%Romero, Oscar ECounting, diatoms
114Paralia sulcataP. sulcata%Romero, Oscar ECounting, diatoms
115Pinnularia borealisP. boralis%Romero, Oscar ECounting, diatoms
116Pinnularia microstauronP. microstauron%Romero, Oscar ECounting, diatoms
117Planktoniella solP. sol%Romero, Oscar ECounting, diatoms
118Pleurosigma directumP. directum%Romero, Oscar ECounting, diatoms
119Pleurosigma planctonicumP. planctonicum%Romero, Oscar ECounting, diatoms
120Proboscia alataP. alata%Romero, Oscar ECounting, diatoms
121Proboscia alata forma indicaP. alata f indica%Romero, Oscar ECounting, diatoms
122Psammodictyon panduriformeP. panduriforme%Romero, Oscar ECounting, diatoms
123Pseudohimantidium pacificumP. pacificum%Romero, Oscar ECounting, diatoms
124Pseudostaurosira brevistriata var. inflataP. brevistriata var. inflata%Romero, Oscar ECounting, diatoms
125Pseudo-nitzschia inflatula var. capitataP-n inflatula var. capitata%Romero, Oscar ECounting, diatoms
126Pseudosolenia calcar-avisP. calcar-avis%Romero, Oscar ECounting, diatoms
127Pseudotriceratium punctatumP. punctatum%Romero, Oscar ECounting, diatoms
128Rhizosolenia acuminataR. acuminata%Romero, Oscar ECounting, diatoms
129Rhizosolenia bergoniiR. bergonii%Romero, Oscar ECounting, diatoms
130Rhizosolenia borealisR. borealis%Romero, Oscar ECounting, diatoms
131Rhizosolenia pungensR. pungens%Romero, Oscar ECounting, diatoms
132Rhizosolenia styliformisR. styliformis%Romero, Oscar ECounting, diatoms
133Rhopalodia sp.Rhopalodia sp.%Romero, Oscar ECounting, diatomsRhopalodia sp. 1
134Roperia tessellataR. tessellata%Romero, Oscar ECounting, diatoms
135Skeletonema costatumS. costatum%Romero, Oscar ECounting, diatoms
136Stauroneis ancepsS. anceps%Romero, Oscar ECounting, diatoms
137Stellarima stellarisS. stellaris%Romero, Oscar ECounting, diatoms
138Stephanodiscus astraeaS. astraea%Romero, Oscar ECounting, diatoms
139Stephanopyxis sp.Stephanopyxis sp.%Romero, Oscar ECounting, diatoms
140Surirella sp.Surirella sp.%Romero, Oscar ECounting, diatoms
141Synedra ulnaS. ulna%Romero, Oscar ECounting, diatoms
142Tabularia sp.Tabularia sp.%Romero, Oscar ECounting, diatoms
143Thalassionema bacillareT. bacillare%Romero, Oscar ECounting, diatoms
144Thalassionema frauenfeldiiT. frauenfeldii%Romero, Oscar ECounting, diatoms
145Thalassionema nitzschioides var. nitzschioidesT. nitzschioides var. nitzschioides%Romero, Oscar ECounting, diatoms
146Thalassionema pseudonitzschioidesT. pseudonitzschioides%Romero, Oscar ECounting, diatoms
147Thalassionema nitzschioides var. inflataT. nitzschioides var. inflata%Romero, Oscar ECounting, diatoms
148Thalassionema nitzschioides var. parvaT. nitzschioides var. parva%Romero, Oscar ECounting, diatoms
149Thalassiosira aestivalisT. aestivalis%Romero, Oscar ECounting, diatoms
150Thalassiosira anguste-lineataT. anguste-lineata%Romero, Oscar ECounting, diatoms
151Thalassiosira bioculataT. bioculata%Romero, Oscar ECounting, diatoms
152Thalassiosira confertaT. conferta%Romero, Oscar ECounting, diatoms
153Thalassiosira delicatulaT. delicatula%Romero, Oscar ECounting, diatoms
154Thalassiosira eccentricaT. eccentrica%Romero, Oscar ECounting, diatoms
155Thalassiosira endoseriataT. endoseriata%Romero, Oscar ECounting, diatoms
156Thalassiosira ferelineataT. ferelineata%Romero, Oscar ECounting, diatoms
157Thalassiosira gerloffiiT. gerloffii%Romero, Oscar ECounting, diatoms
158Thalassiosira gravidaT. gravida%Romero, Oscar ECounting, diatoms
159Thalassiosira lineataT. lineata%Romero, Oscar ECounting, diatoms
160Thalassiosira mendiolanaT. mendiolana%Romero, Oscar ECounting, diatoms
161Thalassiosira minusculaT. minuscula%Romero, Oscar ECounting, diatoms
162Thalassiosira nanolineataT. nanolineata%Romero, Oscar ECounting, diatoms
163Thalassiosira oestrupii var. oestrupiiT. oestrupii var. oestrupii%Romero, Oscar ECounting, diatoms
164Thalassiosira oestrupii var. venrickaeT. oestrupii var. venrickae%Romero, Oscar ECounting, diatoms
165Thalassiosira pacificaT. pacifica%Romero, Oscar ECounting, diatoms
166Thalassiosira plicataT. plicata%Romero, Oscar ECounting, diatoms
167Thalassiosira poro-irregulataT. poro-irregulata%Romero, Oscar ECounting, diatoms
168Thalassiosira punctiferaT. punctifera%Romero, Oscar ECounting, diatoms
169Thalassiosira rotulaT. rotula%Romero, Oscar ECounting, diatoms
170Thalassiosira sackettii forma planaT. sackettii f plana%Romero, Oscar ECounting, diatoms
171Thalassiosira subtilisT. subtilis%Romero, Oscar ECounting, diatoms
172Thalassiosira symmetricaT. symmetrica%Romero, Oscar ECounting, diatoms
173Thalassiosira tumidaT. tumida%Romero, Oscar ECounting, diatoms
174Thalassiosira sp.Thalassiosira sp.%Romero, Oscar ECounting, diatomsThalassiosira sp. 5
175Thalassiosira sp.Thalassiosira sp.%Romero, Oscar ECounting, diatomsThalassiosira sp. Z
176Trachyneis asperaT. aspera%Romero, Oscar ECounting, diatoms
Size:
12996 data points

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