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  • Data  (24)
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  • 1
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    Epibiotic assemblages on seaweeds in the German Wadden Sea (North Sea) (2015)
    PANGAEA
    In:  Supplement to: Gutow, Lars; Beermann, Jan; Buschbaum, Christian; Rivadeneira, Marcelo M; Thiel, Martin (2015): Castaways can't be choosers - Homogenization of rafting assemblages on floating seaweeds. Journal of Sea Research, 95, 161-171, https://doi.org/10.1016/j.seares.2014.07.005
    Details
    Publication Date: 2023-11-14
    Description: After detachment from benthic habitats, the epibiont assemblages on floating seaweeds undergo substantial changes, but little is known regarding whether succession varies among different seaweed species. Given that floating algae may represent a limiting habitat in many regions, rafting organisms may be unselective and colonize any available seaweed patch at the sea surface. This process may homogenize rafting assemblages on different seaweed species, which our study examined by comparing the assemblages on benthic and floating individuals of the fucoid seaweeds Fucus vesiculosus and Sargassum muticum in the northern Wadden Sea (North Sea). Species richness was about twice as high on S. muticum as on F. vesiculosus, both on benthic and floating individuals. In both seaweed species benthic samples were more diverse than floating samples. However, the species composition differed significantly only between benthic thalli, but not between floating thalli of the two seaweed species. Separate analyses of sessile and mobile epibionts showed that the homogenization of rafting assemblages was mainly caused by mobile species. Among these, grazing isopods from the genus Idotea reached extraordinarily high densities on the floating samples from the northern Wadden Sea, suggesting that the availability of seaweed rafts was indeed limiting. Enhanced break-up of algal rafts associated with intense feeding by abundant herbivores might force rafters to recolonize benthic habitats. These colonization processes may enhance successful dispersal of rafting organisms and thereby contribute to population connectivity between sink populations in the Wadden Sea and source populations from up-current regions.
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    (Table S2) Numbers and carapace widths of C. maenas and H. sanguineus sampled around Helgoland (2017)
    PANGAEA
    In:  Supplement to: Jungblut, Simon; Beermann, Jan; Boos, Karin; Saborowski, Reinhard; Hagen, Wilhelm (2017): Population development of the invasive crab Hemigrapsus sanguineus (De Haan, 1853) and its potential native competitor Carcinus maenas (Linnaeus, 1758) at Helgoland (North Sea) between 2009 and 2014. Aquatic Invasions, 12(1), 85-96, https://doi.org/10.3391/ai.2017.12.1.09
    Details
    Publication Date: 2023-11-14
    Description: The Asian shore crab Hemigrapsus sanguineus (De Haan, 1853) has recently established populations in the North Sea and now occurs within the native ranges of the green crab Carcinus maenas (Linnaeus, 1758). To determine potential competitive effects and to assess the progress of the invasion, species-specific population characteristics (numerical abundances, biomasses, and size distributions) of the two species around the island of Helgoland (German Bight, southern North Sea) were compared for surveys conducted in 2009 and 2014. Sampling sites were chosen based on accessibility and differed in their topography and wave exposure, which allowed testing for the influence of these factors on the establishment success of H. sanguineus. The numerical abundance and biomass of H. sanguineus increased markedly and approached those of C. maenas in 2014. At a sheltered site, H. sanguineus even outnumbered C. maenas, whereas the converse was observed at a site exposed to strong winds and waves. Although such contrasting abundance patterns between the native and the introduced shore crab may be the result of direct interference, the dominance of H. sanguineus at the sheltered site may also be explained by enhanced larval settling rates caused by odors of conspecifics. The results suggest that the invasion of H. sanguineus has not yet reached its equilibrium, and population abundances in the North Sea are expected to further increase in the future.
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Number of microplastic particles on periwinkle pedal mucus in experimental setups (2019)
    PANGAEA
    In:  Supplement to: Gutow, Lars; Bartl, Kevin; Saborowski, Reinhard; Beermann, Jan (2019): Gastropod pedal mucus retains microplastics and promotes the uptake of particles by marine periwinkles. Environmental Pollution, 246, 688-696, https://doi.org/10.1016/j.envpol.2018.12.097
    Details
    Publication Date: 2023-11-14
    Description: The rapid dissemination of microplastics in many habitats of the oceans has raised concerns about the consequences for marine biota and ecosystems. Many adverse effects of microplastics on marine invertebrates are consequences of ingestion. Accordingly, the identification of mechanisms that facilitate the uptake of microplastics is essential for the evaluation of possible implications for marine organisms and food webs. Gastropods produce mucus for locomotion. Gastropod pedal mucus naturally retains formerly suspended micro-organisms, such as bacteria, microalgae, and seaweed spores. The retained organisms are consumed by gastropods that forage on pedal mucus. Here, we investigated the potential of gastropod pedal mucus to retain suspended microplastic particles and make them available for ingestion by periwinkles that forage on the contaminated mucus. In laboratory experiments, mucus of the periwinkles Littorina littorea and Littorina obtusata efficiently retained microplastics. Retention of microplastics varied between mucus from conspecifics of different size but not between mucus from either species. The density of microplastics in mucus trails increased concomitantly with the experimental particle concentration but was independent of incubation time. Aging of mucus and, particularly, desiccation affected the retention of microplastics. Periwinkles ingested microplastics when foraging on the contaminated mucus. Our results reveal a functional link between biogenic accumulation of microplastics and their trophic transfer by marine benthic herbivores into marine food webs.
    Type: Dataset
    Format: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 34.9 kBytes
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Number and length of Magallana gigas along the pier system of the island of Helgoland (German Bight, North Sea) (2020)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Description: The dataset comprises abundances and lengths of the Pacific oyster Magellana gigas (formerly Crassostrea gigas). The data were collected at 14 sites along the pier system around the island of Helgoland in the German Bight, North Sea (54°11' N, 7°53' E). Ten replicate quadrats (0.25 m²) were placed at the vertical pier walls at each site by SCUBA divers. In each replicate quadrat, all oysters were counted and measured in 2005, 2006 and 2012.
    Keywords: Crassostrea gigas; DATE/TIME; DIVER; Event label; Hel_Landungsbruecke; Hel_Materialpruefungsanstalt; Hel_Nebelhorn; Hel_NO-Hafen1; Hel_NO-Hafen2; Hel_NW-Mole_east; Hel_NW-Mole_west; Hel_Ostkaje; Hel_Rosengarten; Hel_Schwimmbadmole; Hel_Sueddamm_east; Hel_Sueddamm_west; Hel_Vorhafen_east; Hel_Zollmole; Helgoland, North Sea; Latitude of event; Longitude of event; Magallana gigas; Magallana gigas, length; Replicate; Sampling by diver; Site
    Type: Dataset
    Format: text/tab-separated-values, 9703 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Species on seaweed clumps off Sylt, northern Wadden Sea, Germany (2015)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Acrochaetium secundatum; Alcyonidium mytili; Anoplodactylus petiolatus; Antithamnion sp.; Apherusa bispinosa; Aplidium glabrum; Aplysia fasciata; Apohyale prevostii; Ascophyllum nodosum; Asterias rubens; Austrominius modestus; Autolytus sp.; Balanus crenatus; Belone belone; Berkeleya rutilans; Bivalvia indeterminata, juvenile; Bowerbankia gracilis; Bowerbankia imbricata; Bowerbankia sp.; Bryopsis sp.; Cancer pagurus; Capitella sp.; Caprella linearis; Caprella mutica; Caprella sp.; Carcinus maenas; Ceramium nodulosum; Ceramium rubrum; Ceramium sp.; Cerastoderma edule; Cerastoderma sp.; Chaetomorpha sp.; Chaetomorpha tortuosa; Cheirocratus sp.; Chondrus crispus; Clytia hemisphaerica; Colpomenia sinuosa; Conopeum reticulum; Coryne muscoides; Crassostrea gigas; Crepidula fornicata; Cumacea indeterminata; Cyclopterus lumpus; Date/Time of event; Ectocarpales; Ectocarpus spp.; Elachista fucicola; Electra pilosa; Enteromorpha spp.; Eriocheir sinensis; Erythrotrichia reflexa; Erythrotrichia sp.; Eubranchus exiguus; Event label; Fucus vesiculosus; Fves_bent_1; Fves_bent_10; Fves_bent_11; Fves_bent_12; Fves_bent_13; Fves_bent_2; Fves_bent_3; Fves_bent_4; Fves_bent_5; Fves_bent_6; Fves_bent_7; Fves_bent_8; Fves_bent_9; Fves_float_1; Fves_float_10; Fves_float_11; Fves_float_12; Fves_float_13; Fves_float_14; Fves_float_15; Fves_float_2; Fves_float_3; Fves_float_4; Fves_float_5; Fves_float_6; Fves_float_7; Fves_float_8; Fves_float_9; Gammarus locusta; Gasterosteus aculeatus; Giffordia granulosa; Gitana sarsi; Goniotrichum alsidii; Gracilaria vermiculophylla; Halichondria panicea; Harmothoe imbricata; Hemigrapsus sanguineus; Himanthalia elongata; Hydrobia ulvae; Hydrozoa indeterminata; Idotea baltica; Idotea chelipes; Idotea emarginata; Idotea granulosa; Idotea linearis; Idotea metallica; Idotea neglecta; Idotea pelagica; Idotea sp.; Jaera albifrons; Janiridae indeterminata; Jassa marmorata; Laomedea angulata; Latitude of event; Lepidonotus squamatus; Leucosolenia sp.; Liocarcinus holsatus; Littorina fabalis; Littorina littorea; Littorina obtusata; Longitude of event; Macoma baltica; Membranipora membranacea; Metopa pusilla; Metridium senile; Microprotopus maculatus; Molgula manhattensis; Monocorophium acherusicum; Mya arenaria; Mytilus edulis; Nemertea indeterminata; Nereis diversicolor; Nereis sp.; Nudibranch eggs; Nymphon brevirostre; Obelia geniculata; Obelia longissima; Obelia sp.; Pagurus bernhardus; Palaemon longirostris; Pedicellina sp.; Phycinae; Pilayella sp.; Polydora ciliata; Polysiphonia sp.; Polysiphonia violacea; Polytrichium sp.; Praunus flexuosus; Proceraea cornuta; Pycnogonida indeterminata; Red crustacea indeterminata; Salicornia europaea; Sample ID; Sargassum muticum; Semibalanus balanoides; Smut_bent_1; Smut_bent_10; Smut_bent_11; Smut_bent_12; Smut_bent_13; Smut_bent_2; Smut_bent_3; Smut_bent_4; Smut_bent_5; Smut_bent_6; Smut_bent_7; Smut_bent_8; Smut_bent_9; Smut_float_1; Smut_float_10; Smut_float_11; Smut_float_12; Smut_float_2; Smut_float_3; Smut_float_4; Smut_float_5; Smut_float_6; Smut_float_7; Smut_float_8; Smut_float_9; Spinachia spinachia; Status; Styela clava; Suaeda maritima; Sycon ciliatum; Syllidae indeterminata; Sylt, Rømø bight, North Sea; Syngnathus rostellatus; Ulva lactuca; Zostera marina; Zostera noltii; Zostera sp.
    Type: Dataset
    Format: text/tab-separated-values, 6837 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Composition of seaweed clumps off Sylt, northern Wadden Sea, Germany (2015)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Ascophyllum nodosum; Ascophyllum nodosum, biomass, wet mass; Biomass, wet mass; Comment; Date/Time of event; Event label; Fucus vesiculosus; Fucus vesiculosus, biomass, wet mass; Fves_bent_1; Fves_bent_10; Fves_bent_11; Fves_bent_12; Fves_bent_13; Fves_bent_2; Fves_bent_3; Fves_bent_4; Fves_bent_5; Fves_bent_6; Fves_bent_7; Fves_bent_8; Fves_bent_9; Fves_float_1; Fves_float_10; Fves_float_11; Fves_float_12; Fves_float_13; Fves_float_14; Fves_float_15; Fves_float_2; Fves_float_3; Fves_float_4; Fves_float_5; Fves_float_6; Fves_float_7; Fves_float_8; Fves_float_9; Gracilaria vermiculophylla; Gracilaria vermiculophylla, biomass, wet mass; Himanthalia elongata; Himanthalia elongata, biomass, wet mass; Latitude of event; Longitude of event; Salicornia europaea, biomass, wet mass; Salicornia maritima; Sample ID; Sargassum muticum; Sargassum muticum, biomass, wet mass; Smut_bent_1; Smut_bent_10; Smut_bent_11; Smut_bent_12; Smut_bent_13; Smut_bent_2; Smut_bent_3; Smut_bent_4; Smut_bent_5; Smut_bent_6; Smut_bent_7; Smut_bent_8; Smut_bent_9; Smut_float_1; Smut_float_10; Smut_float_11; Smut_float_12; Smut_float_2; Smut_float_3; Smut_float_4; Smut_float_5; Smut_float_6; Smut_float_7; Smut_float_8; Smut_float_9; Status; Suaeda maritima; Suaeda maritima, biomass, wet mass; Sylt, Rømø bight, North Sea; Zostera marina; Zostera marina, biomass, wet mass; Zostera noltii; Zostera noltii, biomass, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 786 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Benthic thalli and floating patches off Sylt, northern Wadden Sea, Germany (2015)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Biomass, wet mass; Body length; Comment; Date/Time of event; Epibiotic; Event label; Female; Fves_bent_1; Fves_bent_10; Fves_bent_11; Fves_bent_12; Fves_bent_13; Fves_bent_2; Fves_bent_3; Fves_bent_4; Fves_bent_5; Fves_bent_6; Fves_bent_7; Fves_bent_8; Fves_bent_9; Fves_float_1; Fves_float_10; Fves_float_11; Fves_float_12; Fves_float_13; Fves_float_14; Fves_float_15; Fves_float_2; Fves_float_3; Fves_float_4; Fves_float_5; Fves_float_6; Fves_float_7; Fves_float_8; Fves_float_9; Juvenile; Latitude of event; Length, maximal; Longitude of event; Male; Sample ID; Smut_bent_1; Smut_bent_10; Smut_bent_11; Smut_bent_12; Smut_bent_13; Smut_bent_2; Smut_bent_3; Smut_bent_4; Smut_bent_5; Smut_bent_6; Smut_bent_7; Smut_bent_8; Smut_bent_9; Smut_float_1; Smut_float_10; Smut_float_11; Smut_float_12; Smut_float_2; Smut_float_3; Smut_float_4; Smut_float_5; Smut_float_6; Smut_float_7; Smut_float_8; Smut_float_9; Stage megalopa; Status; Sylt, Rømø bight, North Sea; Taxon/taxa
    Type: Dataset
    Format: text/tab-separated-values, 6099 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    (Appendix 7-1) Characteristics of soil samples (2016)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: AWI_P1; AWI_P10; AWI_P11; AWI_P12; AWI_P13; AWI_P14; AWI_P15; AWI_P16; AWI_P17; AWI_P18; AWI_P19; AWI_P2; AWI_P20; AWI_P21; AWI_P22; AWI_P23; AWI_P24; AWI_P25; AWI_P26; AWI_P27; AWI_P28; AWI_P29; AWI_P3; AWI_P30; AWI_P31; AWI_P32; AWI_P33; AWI_P34; AWI_P35; AWI_P36; AWI_P37; AWI_P38; AWI_P39; AWI_P4; AWI_P40; AWI_P41; AWI_P5; AWI_P6; AWI_P7; AWI_P8; AWI_P9; AWI_PerDyn; AWI Arctic Land Expedition; Depth, bottom/max; DEPTH, soil; Depth, top/min; Event label; Kytalyk-Pokhodsk_2012, Kolyma2012; LAND; Longitude of event; Permafrost Research (Periglacial Dynamics) @ AWI; pH; Relief type; RU-Land_2012_Kytalyk_Kolyma; Sample ID; Sampling/measurement on land; Siberia, Russia; Soil horizon; Soil type
    Type: Dataset
    Format: text/tab-separated-values, 938 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    (Table S2) Numbers and carapace widths of Carcinus maenas sampled around Helgoland, August 2009 (2017)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Augusta Mole; Carcinus maenas, carapax width; Carcinus maenas, female; Carcinus maenas, male; DATE/TIME; Event label; Felswatt; HAND; Helgoland, North Sea; Kringel; Latitude of event; Longitude of event; Nordstrand; Northeastern_site; Northwestern_site; Sampling by hand; Southeastern_site; Southwestern_site
    Type: Dataset
    Format: text/tab-separated-values, 565 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    (Table S2) Numbers and carapace widths of Hemigrapsus sanguineus sampled around Helgoland, August 2009 (2017)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Augusta Mole; DATE/TIME; Event label; Felswatt; HAND; Helgoland, North Sea; Hemigrapsus sanguineus, carapax width; Hemigrapsus sanguineus, female; Hemigrapsus sanguineus, male; Kringel; Latitude of event; Longitude of event; Nordstrand; Northeastern_site; Northwestern_site; Sampling by hand; Southeastern_site; Southwestern_site
    Type: Dataset
    Format: text/tab-separated-values, 199 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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