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  • PANGAEA  (66)
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  • 1
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    Marine Litter quantities on six Beaches of northern Svalbard in 2016 determined by citizen scientists (2017)
    PANGAEA
    In:  Supplement to: Bergmann, Melanie; Lutz, Birgit; Tekman, Mine Banu; Gutow, Lars (2017): Citizen scientists reveal: Marine litter pollutes Arctic beaches and affects wild life. Marine Pollution Bulletin, 125(1-2), 535-540, https://doi.org/10.1016/j.marpolbul.2017.09.055
    Details
    Publication Date: 2023-03-16
    Description: Beaches on remote Arctic islands may be sinks for marine litter and reflect pollution levels of the surrounding waters particularly well. We provide the first quantitative data from surveys carried out by citizen scientists on six beaches of northern Svalbard. Litter quantities recorded by cruise tourists varied from 9-524 g m-2 and were similar to those from densely populated areas. Plastics accounted for 〉80% of the overall litter, most of which originated from fisheries. Our study highlights the potential of citizen scientists to provide scientifically valuable data on the pollution of sensitive remote ecosystems. The results stress once more that current legislative frameworks are insufficient to tackle the pollution of Arctic ecosystems.
    Keywords: Alpinioya; Area; Brucebukta; Crozierpynten; DATE/TIME; Event label; FRAM; FRontiers in Arctic marine Monitoring; HAND; Isflakbukta; Latitude of event; Longitude of event; Marine litter, biotic; Marine litter, fabric; Marine litter, glass; Marine litter, metal; Marine litter, plastic; Marine litter, total; Method comment; Reinstrandodden; Sampling by hand; Sediment type; Sorvika; Svalbard
    Type: Dataset
    Format: text/tab-separated-values, 66 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Marine meso-herbivore consumption scales faster with temperature than seaweed primary production, supplementary material (2016)
    PANGAEA
    In:  Supplement to: Gutow, Lars; Petersen, Imke; Bartl, Kevin; Hünerlage, Kim (2016): Marine meso-herbivore consumption scales faster with temperature than seaweed primary production. Journal of Experimental Marine Biology and Ecology, 477, 80-85, https://doi.org/10.1016/j.jembe.2016.01.009
    Details
    Publication Date: 2023-01-13
    Description: Respiration of ectotherms is predicted to increase faster with rising environmental temperature than photosynthesis of primary producers because of the differential temperature dependent kinetics of the key enzymes involved. Accordingly, if biological processes at higher levels of complexity are constrained by underlying metabolic functions food consumption by heterotrophs should increase more rapidly with rising temperature than photo-autoptrophic primary production. We compared rates of photosynthesis and growth of the benthic seaweed Fucus vesiculosus with respiration and consumption of the isopod Idotea baltica to achieve a mechanistic understanding why warming strengthens marine plant-herbivore interactions. In laboratory experiments thallus pieces of the seaweed and individuals of the grazer were exposed to constant temperatures at a range from 10 to 20°C. Photosynthesis of F. vesiculosus did not vary with temperature indicating efficient thermal acclimation whereas growth of the algae clearly increased with temperature. Respiration and food consumption of I. baltica also increased with temperature. Grazer consumption scaled about 2.5 times faster with temperature than seaweed production. The resulting mismatch between algal production and herbivore consumption may result in a net loss of algal tissue at elevated temperatures. Our study provides an explanation for faster decomposition of seaweeds at elevated temperatures despite the positive effects of high temperatures on algal growth.
    Type: Dataset
    Format: application/zip, 1.8 MBytes
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    DATA PANGAEA
  • 3
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    Experimental evaluation of seaweeds as a vector for microplastics into marine food webs, supplementary material
    PANGAEA
    In:  Supplement to: Gutow, Lars; Eckerlebe, Antonia; Giménez, Luis; Saborowski, Reinhard (2015): Experimental evaluation of seaweeds as a vector for microplastics into marine food webs. Environmental Science & Technology, https://doi.org/10.1021/acs.est.5b02431
    Details
    Publication Date: 2023-05-12
    Description: The ingestion of microplastics has been shown for a great variety of marine organisms. However, benthic marine mesoherbivores such as the common periwinkle Littorina littorea have been largely disregarded in studies about the effects of microplastics on the marine biota, probably because the pathway for microplastics to this functional group of organisms was not obvious. In laboratory experiments we showed that the seaweed Fucus vesiculosus retains suspended microplastics on its surface. The numbers of microplastics that adhered to the algae correlated with the concentrations of suspended particles in the water. In choice feeding assays L. littorea did not distinguish between algae with adherent microplastics and clean algae without microplastics, indicating that the snails do not recognize solid nonfood particles in the submillimeter size range as deleterious. In periwinkles that were feeding on contaminated algae, microplastics were found in the stomach and in the gut. However, no microplastics were found in the midgut gland, which is the principle digestive organ of gastropods. Microplastics in the fecal pellets of the periwinkles indicate that the particles do not accumulate rapidly inside the animals but are mostly released with the feces. Our results provide the first evidence that seaweeds may represent an efficient pathway for microplastics from the water to marine benthic herbivores.
    Type: Dataset
    Format: application/zip, 40.4 kBytes
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    DATA PANGAEA
  • 4
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    Effects of ocean acidification on growth and physiology of Ulva lactuca (Chlorophyta) in a rockpool-scenario, link to supplementary data (2013)
    PANGAEA
    In:  Supplement to: Olischläger, Mark; Bartsch, Inka; Gutow, Lars; Wiencke, Christian (2013): Effects of ocean acidification on growth and physiology of Ulva lactuca (Chlorophyta) in a rockpool-scenario. Phycological Research, 61(3), 180-190, https://doi.org/10.1111/pre.12006
    Details
    Publication Date: 2023-06-13
    Description: Rising atmospheric CO2-concentrations will have severe consequences for a variety of biological processes. We investigated the responses of the green alga Ulva lactuca (Linnaeus) to rising CO2-concentrations in a rockpool scenario. U. lactuca was cultured under aeraton with air containing either preindustrial pCO2 (280µatm) or for the end of the 21st century predicted (700µatm) pCO2 for 31 days. We addressed the following question: Will elevated CO2-concentrations affect photosynthesis (net photosynthesis, rETR(max), Fv/Fm, pigment composition) and growth of U. lactuca in rockpools with limited water exchange? Two phases of the experiment were distinguished: In the initial phase (day 1-4) the Seawater Carbonate System (SWCS) of the culture medium could be adjusted to the selected atmospheric pCO2 condition by continuous aeration with target pCO2 values. In the second phase (day 4-31) the SWCS was largely determined by the metabolism of the growing U. lactuca biomass. In the initial phase, Fv/Fm and rETR(max) were only slightly elevated at high CO2-concentrations whereas growth was significantly enhanced. After 31 days the Chl a content of the thalli was significantly lower under future conditions and the photosynthesis of thalli grown under preindustrial conditions was not dependent on external carbonic anhydrase. Biomass increased significantly at high CO2-concentrations. At low CO2-concentrations most adult thalli disintegrated between day 14 and 21, whereas at high CO2-concentrations most thalli remained integer until day 31. Thallus disintegration at low CO2-concentrations was mirrored in a drastic decline in seawater DIC and HCO3-. Accordingly, the SWCS differed significantly between the treatments. Our results indicated a slight enhancement of photosynthetic performance and significantly elevated growth of U. lactuca at future CO2-concentrations. The accelerated thallus disintegration at high CO2-concentrations under conditions of limited water exchange indicates additional CO2 effects on the life cycle of U. lactuca when living in rockpools.
    Keywords: AWI_Coast; BIOACID; Biological Impacts of Ocean Acidification; Coastal Ecology @ AWI
    Type: Dataset
    Format: application/zip, 2.5 MBytes
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  • 5
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    Seawater carbonate chemistry and growth and physiology of Ulva lactuca (Chlorophyta) in a rockpool-scenario
    PANGAEA
    Details
    Publication Date: 2023-06-13
    Keywords: Alkalinity, total; Aragonite saturation state; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Carbonate ion; Carbon dioxide; Chlorophyll a; Chlorophyll b; Chlorophyta; Coast and continental shelf; Date; Dry mass; Growth/Morphology; Growth rate; Identification; Incubation duration; Laboratory experiment; Macroalgae; Maximal electron transport rate, relative; Maximum photochemical quantum yield of photosystem II; Net photosynthesis rate, oxygen; Net photosynthesis rate, oxygen, per chlorophyll a; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Plantae; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Replicate; Salinity; Single species; Species; Temperate; Temperature, water; Treatment; Ulva lactuca
    Type: Dataset
    Format: text/tab-separated-values, 1851 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Rafting assemblages on pelagic Sargassum and floating marine debris from the Sargasso Sea (2021)
    PANGAEA
    Details
    Publication Date: 2023-06-01
    Description: Pelagic Sargassum and floating marine debris were collected in the Sargasso Sea (subtropical NW Atlantic) during the cruise MSM41 of the German research vessel Maria S. Merian in April 2015. Flotsam items were collected with a dip net (mesh size: 1 mm) from the rescue boat of the research vessel at 19 stations distributed in coordination with the other sampling activities of the cruise. Few, mostly larger, debris samples were taken from aboard the research vessel using a dip net with a mesh size of 9 cm. The exact sampling position of each floating item was recorded by a handheld GPS. All mobile epifaunal organisms were carefully washed down from the flotsam items with freshwater and retrieved in a sieve with a mesh size of 250 µm. The species were identified and the individuals counted. Each Sargassum thallus was inspected under a stereo microscope to identify the attached sessile epifaunal species. Sessile species were not quantified. The marine debris items or sub-samples thereof (in case of large bulky items) were preserved in buffered formalin-seawater solution. The sessile epifauna on the debris items was analyzed after the cruise in the laboratories of the Alfred Wegener Institute in Bremerhaven, Germany. Each Sargassum clump was blotted on tissue paper to remove adherent seawater and weighed. The sizes of the debris items were measured to calculate the surface area.
    Keywords: Comment; DATE/TIME; epibiota; Event label; floating marine debris; LATITUDE; LITTER; Litter Survey; LONGITUDE; Maria S. Merian; Mobility; MSM41; MSM41_litter-A; MSM41_litter-B; MSM41_litter-C; MSM41_litter-D; MSM41_litter-E; MSM41_litter-F; MSM41_litter-G; MSM41_litter-G1; MSM41_litter-H; MSM41_litter-I; MSM41_litter-J; MSM41_litter-K; MSM41_litter-M; MSM41_litter-N; MSM41_litter-O; MSM41_litter-P; MSM41_litter-Q; MSM41_litter-S; MSM41_litter-U; MSM41_litter-V; pollution; rafting; Rafting species; Sample ID; Sargasso Sea; Sargassum community; South Atlantic Ocean; Station label; Substratum; Substratum category; Taxon/taxa
    Type: Dataset
    Format: text/tab-separated-values, 8362 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Marine litter at the sea surface of the SE North Sea (2018)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-05-03
    Keywords: AWI; Comment; DATE/TIME; DEPTH, water; Event label; HE256_MarLitter_transect01; HE256_MarLitter_transect02; HE256_MarLitter_transect03; HE256_MarLitter_transect04; HE256_MarLitter_transect05; HE256_MarLitter_transect06; HE256_MarLitter_transect07; HE256_MarLitter_transect08; HE256_MarLitter_transect09; HE256_MarLitter_transect10; HE263_MarLitter_transect01; HE263_MarLitter_transect02; HE266_MarLitter_transect01; HE266_MarLitter_transect02; HE266_MarLitter_transect03; HE266_MarLitter_transect04; HE266_MarLitter_transect05; HE274_MarLitter_transect01; HE274_MarLitter_transect02; HE274_MarLitter_transect03; HE280_MarLitter_transect01; HE280_MarLitter_transect02; HE285_MarLitter_transect01; HE285_MarLitter_transect02; HE285_MarLitter_transect03; HE285_MarLitter_transect04; HE285_MarLitter_transect05; HE285_MarLitter_transect06; HE285_MarLitter_transect07; HE285_MarLitter_transect08; HE291_MarLitter_transect01; HE291_MarLitter_transect02; HE419_MarLitter_transect01; HE419_MarLitter_transect02; HE419_MarLitter_transect03; HE419_MarLitter_transect04; HE419_MarLitter_transect05; HE419_MarLitter_transect06; HE419_MarLitter_transect07; HE419_MarLitter_transect08; HE419_MarLitter_transect09; HE419_MarLitter_transect10; HE419_MarLitter_transect11; HE419_MarLitter_transect12; HE419_MarLitter_transect13; HE419_MarLitter_transect14; HE419_MarLitter_transect15; HE419_MarLitter_transect16; HE419_MarLitter_transect17; HE419_MarLitter_transect18; HE419_MarLitter_transect19; HE419_MarLitter_transect20; HE419_MarLitter_transect21; HE419_MarLitter_transect22; HE419_MarLitter_transect23; HE419_MarLitter_transect24; HE419_MarLitter_transect25; HE419_MarLitter_transect26; HE419_MarLitter_transect27; HE419_MarLitter_transect28; HE419_MarLitter_transect29; HE419_MarLitter_transect30; HE419_MarLitter_transect31; HE419_MarLitter_transect32; HE419_MarLitter_transect33; HE419_MarLitter_transect34; HE419_MarLitter_transect35; HE419_MarLitter_transect36; HE419_MarLitter_transect37; HE419_MarLitter_transect38; HE460_MarLitter_transect01; HE460_MarLitter_transect02; HE460_MarLitter_transect03; LATITUDE; Litter; LITTER; Litter, category; Litter, object; Litter Survey; LONGITUDE; Marine litter, fisheries (yes/no); North Sea; Number; Station label
    Type: Dataset
    Format: text/tab-separated-values, 5054 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Transect descriptions of marine litter surveys at the sea surface of the SE North Sea (2018)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-05-03
    Keywords: Area; AWI; Date/Time of event; Date/Time of event 2; DEPTH, water; Event label; HE256_MarLitter_transect01; HE256_MarLitter_transect02; HE256_MarLitter_transect03; HE256_MarLitter_transect04; HE256_MarLitter_transect05; HE256_MarLitter_transect06; HE256_MarLitter_transect07; HE256_MarLitter_transect08; HE256_MarLitter_transect09; HE256_MarLitter_transect10; HE263_MarLitter_transect01; HE263_MarLitter_transect02; HE266_MarLitter_transect01; HE266_MarLitter_transect02; HE266_MarLitter_transect03; HE266_MarLitter_transect04; HE266_MarLitter_transect05; HE274_MarLitter_transect01; HE274_MarLitter_transect02; HE274_MarLitter_transect03; HE280_MarLitter_transect01; HE280_MarLitter_transect02; HE285_MarLitter_transect01; HE285_MarLitter_transect02; HE285_MarLitter_transect03; HE285_MarLitter_transect04; HE285_MarLitter_transect05; HE285_MarLitter_transect06; HE285_MarLitter_transect07; HE285_MarLitter_transect08; HE291_MarLitter_transect01; HE291_MarLitter_transect02; HE419_MarLitter_transect01; HE419_MarLitter_transect02; HE419_MarLitter_transect03; HE419_MarLitter_transect04; HE419_MarLitter_transect05; HE419_MarLitter_transect06; HE419_MarLitter_transect07; HE419_MarLitter_transect08; HE419_MarLitter_transect09; HE419_MarLitter_transect10; HE419_MarLitter_transect11; HE419_MarLitter_transect12; HE419_MarLitter_transect13; HE419_MarLitter_transect14; HE419_MarLitter_transect15; HE419_MarLitter_transect16; HE419_MarLitter_transect17; HE419_MarLitter_transect18; HE419_MarLitter_transect19; HE419_MarLitter_transect20; HE419_MarLitter_transect21; HE419_MarLitter_transect22; HE419_MarLitter_transect23; HE419_MarLitter_transect24; HE419_MarLitter_transect25; HE419_MarLitter_transect26; HE419_MarLitter_transect27; HE419_MarLitter_transect28; HE419_MarLitter_transect29; HE419_MarLitter_transect30; HE419_MarLitter_transect31; HE419_MarLitter_transect32; HE419_MarLitter_transect33; HE419_MarLitter_transect34; HE419_MarLitter_transect35; HE419_MarLitter_transect36; HE419_MarLitter_transect37; HE419_MarLitter_transect38; HE460_MarLitter_transect01; HE460_MarLitter_transect02; HE460_MarLitter_transect03; LATITUDE; Latitude of event; Latitude of event 2; Length of transect; LITTER; Litter Survey; LONGITUDE; Longitude of event; Longitude of event 2; Marine litter; Marine litter, fishing net; North Sea; Sample code/label; Width of transect
    Type: Dataset
    Format: text/tab-separated-values, 584 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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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
  • 10
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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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