Lischka, Silke; Bach, Lennart Thomas; Csenteri, Katharina; Gorb, Stanislav N; Konschak, Sonja; Michels, Jan (2024): Shell dissolution state of the thecosome pteropod Limacina helicina antarctica during Polarstern cruise PS111 (ANT-XXXIII/2) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.966222
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Abstract:
At high latitudes, thecosome pteropods (marine pelagic mollusks) can dominate zooplankton communities and are important food web components. Due to their calcium carbonate shell made of aragonite, they significantly contribute to ocean carbon flux and are particularly vulnerable to ocean acidification. Aragonite undersaturation (Ωar < 1) events are projected to rapidly increase in frequency and duration in the Antarctic Weddell Sea by 2050 due to uptake of increasing amounts of anthropogenic CO2. This potentially perils thecosomes by inducing shell dissolution. The project aim was to describe the importance of thecosome pteropods in terms of their biomass contribution relative to that of other mesozooplankton groups in the Weddell Sea pelagic ecosystem and to describe the current shell dissolution state of thecosome pteropods in relation to prevailing ocean carbonate chemistry conditions as a benchmark for possible future monitoring of ongoing ocean change processes. This dataset includes the shell dissolution assessment performed on scanning electron microscopy (SEM) pictures of individual thecosome pteropod specimen of the species Limacina helicina antarctica. It also includes accompanying overview pictures of the pteropods taken prior to SEM analysis with a stereomicroscope. Total dissolution severity was assessed based on the occurrence of three severity types of dissolution (Type I, Type II, Type III) on the surface of the protoconch and first two whorls of the individual shells. Along with the dataset individual SEM pictures of each shell (overview and close-ups of the 2nd whorl, 1st whorl and the protoconch) are provided. Individual Pteropods were usually collected from 500–0 m depth during PS111 at the eastern Weddell Sea Shelf and the Filchner-Ronne ice shelf.
Keyword(s):
Coverage:
Median Latitude: -76.234929 * Median Longitude: -40.513904 * South-bound Latitude: -77.898090 * West-bound Longitude: -60.796031 * North-bound Latitude: -73.699743 * East-bound Longitude: -25.729409
Date/Time Start: 2018-02-03T02:24:00 * Date/Time End: 2018-02-25T10:36:00
Minimum DEPTH, water: 2 m * Maximum DEPTH, water: 500 m
Event(s):
PS111_17-3 * Latitude: -73.699743 * Longitude: -25.729409 * Date/Time: 2018-02-03T02:24:00 * Elevation: -3239.0 m * Location: Weddell Sea * Campaign: PS111 (ANT-XXXIII/2) * Basis: Polarstern * Method/Device: Bongo net (BONGO)
PS111_37-3 * Latitude: -76.483071 * Longitude: -52.639250 * Date/Time: 2018-02-09T16:15:00 * Elevation: -396.0 m * Location: Weddell Sea * Campaign: PS111 (ANT-XXXIII/2) * Basis: Polarstern * Method/Device: Bongo net (BONGO)
PS111_42-5 * Latitude: -76.144001 * Longitude: -53.356920 * Date/Time: 2018-02-10T22:10:00 * Elevation: -496.0 m * Location: Weddell Sea * Campaign: PS111 (ANT-XXXIII/2) * Basis: Polarstern * Method/Device: Bongo net (BONGO)
Comment:
Presence [1] or absence [0]
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Event label | Event | Lischka, Silke | |||
2 | Comment | Comment | Lischka, Silke | number of haul not assigned | ||
3 | Date/Time of event | Date/Time | Lischka, Silke | |||
4 | Latitude of event | Latitude | Lischka, Silke | |||
5 | Longitude of event | Longitude | Lischka, Silke | |||
6 | Method/Device of event | Method/Device | Lischka, Silke | |||
7 | DEPTH, water | Depth water | m | Lischka, Silke | Geocode – Sampling depth of pteropods (maximum depth of vertical hauls) | |
8 | Species, unique identification | Species UID | Lischka, Silke | |||
9 | Species, unique identification (Semantic URI) | Species UID (Semantic URI) | Lischka, Silke | |||
10 | Species, unique identification (URI) | Species UID (URI) | Lischka, Silke | |||
11 | File type | File type | Lischka, Silke | |||
12 | Device type | Device | Lischka, Silke | Method: Hitachi Tabletop Microscope TM3000 (Hitachi-High-Technologies Corporation Ltd., Tokyo, Japan); Zeiss Discovery V8 Stereomicroscope with AxioCamMRc | ||
13 | Magnification | Mag | X | Lischka, Silke | ||
14 | File name | File name | Lischka, Silke | |||
15 | Image, specimens | IMAGE spec | Lischka, Silke | |||
16 | Image, specimens (File Size) | IMAGE spec (Size) | Bytes | Lischka, Silke | ||
17 | Image, specimens (Media Type) | IMAGE spec (Type) | Lischka, Silke | |||
18 | Resolution | Resolution | Lischka, Silke | Pixel | ||
19 | Description | Description | Lischka, Silke | Pictured shell area (Overview of whole shell, close-ups of 2nd whorl, 1st whorl and protoconch) | ||
20 | Number | No | Lischka, Silke | Consecutive number of examined shell | ||
21 | Presence/absence | Presence/absence | Lischka, Silke | Pc_Type_I (Type I Dissolution on protoconch) | ||
22 | Presence/absence | Presence/absence | Lischka, Silke | Pc_Type_II (Type II Dissolution on protoconch) | ||
23 | Presence/absence | Presence/absence | Lischka, Silke | Pc_Type_III (Type III Dissolution on protoconch) | ||
24 | Presence/absence | Presence/absence | Lischka, Silke | Pc_Scratches (scratches on protoconch) | ||
25 | Presence/absence | Presence/absence | Lischka, Silke | 1st_Type_I (Type I Dissolution on first whorl) | ||
26 | Presence/absence | Presence/absence | Lischka, Silke | 1st_Type_II (Type II Dissolution on first whorl) | ||
27 | Presence/absence | Presence/absence | Lischka, Silke | 1st_Type_III (Type III Dissolution on first whorl) | ||
28 | Presence/absence | Presence/absence | Lischka, Silke | 1st_Scratches (scratches on first whorl) | ||
29 | Presence/absence | Presence/absence | Lischka, Silke | 2nd_Type_I (Type I Dissolution on second whorl) | ||
30 | Presence/absence | Presence/absence | Lischka, Silke | 2nd_Type_II (Type II Dissolution on second whorl) | ||
31 | Presence/absence | Presence/absence | Lischka, Silke | 2nd_Type_III (Type III Dissolution on second whorl) | ||
32 | Presence/absence | Presence/absence | Lischka, Silke | 2nd_Scratches (scratches on second whorl) | ||
33 | Sum | Sum | Lischka, Silke | Weighted sum of Type I dissolution on protoconch, first and second whorl | ||
34 | Sum | Sum | Lischka, Silke | Weighted sum of Type II dissolution on protoconch, first and second whorl | ||
35 | Sum | Sum | Lischka, Silke | Weighted sum of Type III dissolution on protoconch, first and second whorl | ||
36 | Sum | Sum | Lischka, Silke | dissolution severity (sum of weighted sums of Type I, Type II and Type III dissolution on protoconch, first and second whorl) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
3911 data points
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