Citation:

lno.11187

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Abstract:

The epibenthos of the Southern Ocean shelves plays a significant role in marine ecosystem functioning, including biodiversity processes, but information on its composition, distribution and ecological drivers is still scarce. Here, we report results of a first study on the relationship between the spatial patterns of 18 systematic or functional groups and environmental factors, conducted in the waters off the northern Antarctic Peninsula during RV Polarstern cruise XXIX/3 (PS81) in January-March 2013. To comparatively address this issue at three nested spatial scales, seabed imaging surveys were performed along 28 photographic transects of 2 km length each at water depths from 70 to 770 m in three ecoregions (northwestern Weddell Sea, southern Bransfield Strait and southern Drake Passage), which differ in general environmental setting, primarily oceanographic characteristics and sea-ice dynamics. At a regional (100-km) scale, epibenthic assemblages differed significantly from each other in all three ecoregions, whereas at an intermediate 10-km scale, differences among depth-related habitat types (bank, upper slope, lower slope, deep/canyon) were less pronounced. These regional and intermediate spatial patterns were superimposed by a marked small-scale (10-m) patchiness of epibenthic distribution within the 2-km transects. Obvious correlation between mega-epibenthos and environmental factors (e.g., temperature, salinity, oxygen, sea-ice cover, seabed ruggedness) was found especially for large scales of >2 km.

Related to:

Bracher, Astrid; Huntemann, Marcus (2016): Chlorophyll-a concentration and sea ice concentration at OFOS stations during POLARSTERN cruise ANT-XXIX/3 derived from the merged daily Full Product Set (FPS) of the GlobColour Archive. PANGAEA, https://doi.org/10.1594/PANGAEA.849286

Dorschel, Boris (2016): Benthic terrain modeler sea-bed classification for OFOS stations during POLARSTERN cruise ANT-XXIX/3. PANGAEA, https://doi.org/10.1594/PANGAEA.849287

Piepenburg, Dieter; Segelken-Voigt, Alexandra; Gutt, Julian (2013): Seabed photographs taken along OFOS profiles during POLARSTERN cruise PS81 (ANT-XXIX/3). Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.872719

Schröder, Michael; Wisotzki, Andreas; van Caspel, Mathias (2016): Physical oceanography measured on water bottle samples related to OFOS stations during POLARSTERN cruise ANT-XXIX/3. PANGAEA, https://doi.org/10.1594/PANGAEA.849281

Segelken-Voigt, Alexandra; Bracher, Astrid; Dorschel, Boris; Gutt, Julian; Huneke, Wilma; Link, Heike; Piepenburg, Dieter (2016): Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern Antarctic Peninsula during POLARSTERN cruise ANT-XXIX/3. PANGAEA, https://doi.org/10.1594/PANGAEA.849291

Segelken-Voigt, Alexandra; Gutt, Julian (2016): Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula studies from OFOS sea-bed images from POLARSTERN cruise ANT-XXIX/3. PANGAEA, https://doi.org/10.1594/PANGAEA.849289

Coverage:

Median Latitude: -62.953808 * Median Longitude: -57.787249 * South-bound Latitude: -64.008246 * West-bound Longitude: -61.232206 * North-bound Latitude: -61.936088 * East-bound Longitude: -54.100406

Date/Time Start: 2013-01-26T11:42:14 * Date/Time End: 2013-03-12T21:00:36

Minimum Elevation: -784.0 m * Maximum Elevation: -28.7 m

Event(s):

PS81/116-3 * Latitude Start: -62.564749 * Longitude Start: -56.401008 * Latitude End: -62.562786 * Longitude End: -56.471238 * Date/Time Start: 2013-01-26T11:40:03 * Date/Time End: 2013-01-26T15:36:08 * Elevation Start: -201.2 m * Elevation End: -249.0 m * Location: Scotia Sea * Campaign: (PS81) * Basis: * Method/Device: Ocean Floor Observation System (OFOS)

PS81/118-3 * Latitude Start: -62.450518 * Longitude Start: -56.283971 * Latitude End: -62.417034 * Longitude End: -56.289294 * Date/Time Start: 2013-01-27T08:25:11 * Date/Time End: 2013-01-27T12:25:00 * Elevation Start: -418.5 m * Elevation End: -447.9 m * Location: Scotia Sea * Campaign: (PS81) * Basis: * Method/Device: Ocean Floor Observation System (OFOS)

PS81/160-1 * Latitude Start: -63.169739 * Longitude Start: -54.116816 * Latitude End: -63.183035 * Longitude End: -54.097307 * Date/Time Start: 2013-02-08T16:36:47 * Date/Time End: 2013-02-08T20:14:28 * Elevation Start: -214.9 m * Elevation End: -248.1 m * Location: Weddell Sea * Campaign: (PS81) * Basis: * Method/Device: Ocean Floor Observation System (OFOS)

Comment:

For most animal groups, % sea-floor coverage values were assessed as such (columns 13-31), with the exception of Ophiuroidea, for which first abundance-class values were determined (column 32) that were then converted to % sea-floor coverage values (column 25), see Gutt et al. (submitted)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Gutt, Julian
2	Station label	Station		Gutt, Julian	when different from event Nachtigaller pseudo stations
3	File name	File name		Gutt, Julian
4	Uniform resource locator/link to image	URL image		Gutt, Julian
5	Station label	Station		Gutt, Julian	related to CTD station
6	DATE/TIME	Date/Time		Gutt, Julian	Geocode
7	LATITUDE	Latitude		Gutt, Julian	Geocode
8	LONGITUDE	Longitude		Gutt, Julian	Geocode
9	Depth, bathymetric	Bathy depth	m	Gutt, Julian	PODAS
10	Length	l	m	Gutt, Julian	Horiontal length of captured area
11	Length	l	m	Gutt, Julian	Vertical length of captured area
12	Area	Area	m²	Gutt, Julian	Captured area
13	Demospongiae, cover	Demospongiae cov	%	Gutt, Julian
14	Hexactinellida, cover	Hexactinellida cov	%	Gutt, Julian
15	Gorgonaria, cover	Gorgonaria cov	%	Gutt, Julian
16	Hydrozoa, cover	Hydrozoa cov	%	Gutt, Julian
17	Anthozoa, cover	Anthozoa cov	%	Gutt, Julian
18	Polychaeta, mobile, cover	Polychaeta mobile cov	%	Gutt, Julian
19	Bryozoa, cover	Bryozoa cov	%	Gutt, Julian
20	Holothuroidea, filter-feeding, cover	Holothuroidea filt cov	%	Gutt, Julian
21	Holothuroidea, deposit-feeding, cover	Holothuroidea dep cov	%	Gutt, Julian
22	Echinoidea, cover	Echinoidea cov	%	Gutt, Julian
23	Crinoidea, cover	Crinoidea cov	%	Gutt, Julian
24	Asteroidea, cover	Asteroidea cov	%	Gutt, Julian
25	Ophiuroidea, cover	Ophiuroidea cov	%	Gutt, Julian
26	Ascidiacea, solitary, cover	Ascidiacea sol cov	%	Gutt, Julian
27	Ascidiacea, colonial, cover	Ascidiacea colcov	%	Gutt, Julian
28	Hemichordata, cover	Hemichordata cov	%	Gutt, Julian
29	Infauna indicator, cover	Infauna cov	%	Gutt, Julian
30	Epifauna, other, cover	Epifauna oth cov	%	Gutt, Julian
31	Fauna, total, cover	Fauna tot cov	%	Gutt, Julian
32	Ophiuroidea, abundance	Ophiuroidea abund		Gutt, Julian
33	Hard substrat, classes	Hard substrat		Gutt, Julian	classification for the abundance of hard substrata in % sea-floor coverage; centres of classes in parentheses: 0% (0), 0%-5% (1), 5%-30% (2), 30%-100% (3).

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Size:

81179 data points

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