cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.875179
title: Seabed photographs taken along OFOS profile PS72/137-4 during POLARSTERN cruise ARK-XXIII/2
DOI: 10.1594/pangaea.903943
title: Biochemical investigation of multicorer sediment profile PS85/463-1

description: To detect and track the impact of large-scale environmental changes in a the transition zone between the northern North Atlantic and the central Arctic Ocean, and to determine experimentally the factors controlling deep-sea biodiversity, the Alfred- Wegener-Institute for Polar and Marine Research (AWI) established the deep-sea long-term observatory HAUSGARTEN, which constitutes the first, and until now only open-ocean long-term station in a polar region. Virtually undisturbed sediment samples have been taken using a video-guided multiple corer (MUC) at 13 HAUSGARTEN stations along a bathymetric (1,000 - 4,000 m water depth) and a latitudinal transect in 2,500 m water depth as well as two stations at 230 and 1,200 m water depth within the framework of the KONGHAU project. Various biogenic sediment compounds were analyzed to estimate the input of organic matter from phytodetritus sedimentation, benthic activities (e.g. bacterial exoenzymatic activity), and the total biomass of the smallest sediment-inhabiting organisms (size range: bacteria to meiofauna).
DOI: 10.1594/pangaea.903939
title: Biochemical investigation of multicorer sediment profile PS85/441-1

description: To detect and track the impact of large-scale environmental changes in a the transition zone between the northern North Atlantic and the central Arctic Ocean, and to determine experimentally the factors controlling deep-sea biodiversity, the Alfred- Wegener-Institute for Polar and Marine Research (AWI) established the deep-sea long-term observatory HAUSGARTEN, which constitutes the first, and until now only open-ocean long-term station in a polar region. Virtually undisturbed sediment samples have been taken using a video-guided multiple corer (MUC) at 13 HAUSGARTEN stations along a bathymetric (1,000 - 4,000 m water depth) and a latitudinal transect in 2,500 m water depth as well as two stations at 230 and 1,200 m water depth within the framework of the KONGHAU project. Various biogenic sediment compounds were analyzed to estimate the input of organic matter from phytodetritus sedimentation, benthic activities (e.g. bacterial exoenzymatic activity), and the total biomass of the smallest sediment-inhabiting organisms (size range: bacteria to meiofauna).
DOI: 10.1594/pangaea.903940
title: Biochemical investigation of multicorer sediment profile PS85/445-1

description: To detect and track the impact of large-scale environmental changes in a the transition zone between the northern North Atlantic and the central Arctic Ocean, and to determine experimentally the factors controlling deep-sea biodiversity, the Alfred- Wegener-Institute for Polar and Marine Research (AWI) established the deep-sea long-term observatory HAUSGARTEN, which constitutes the first, and until now only open-ocean long-term station in a polar region. Virtually undisturbed sediment samples have been taken using a video-guided multiple corer (MUC) at 13 HAUSGARTEN stations along a bathymetric (1,000 - 4,000 m water depth) and a latitudinal transect in 2,500 m water depth as well as two stations at 230 and 1,200 m water depth within the framework of the KONGHAU project. Various biogenic sediment compounds were analyzed to estimate the input of organic matter from phytodetritus sedimentation, benthic activities (e.g. bacterial exoenzymatic activity), and the total biomass of the smallest sediment-inhabiting organisms (size range: bacteria to meiofauna).
DOI: 10.1594/pangaea.883554
title: In situ measured oxygen profiles from station PS85/476-1 (HG I) within the HAUSGARTEN area (Fram Strait) in 2014 (POLARSTERN cruise PS85)

description: During PS85 (in 2014) and PS93.2 (in 2015) autonomous benthic lander were deployed at the HAUSGARTEN stations HG I and HG IV. The lander was equipment with a profiler unit, which holds electrochemical, needly type oxygen sensors in order to measure oxygen profiles across the sediment-water interface. By using the profiles, the diffusive oxygen uptake was calculated via the decrease in the oxygen concentration in the Diffusive Boundary Layer (DBL). For a further description of the calculation, please check the related publication.
DOI: 10.1594/pangaea.903942
title: Biochemical investigation of multicorer sediment profile PS85/460-4

description: To detect and track the impact of large-scale environmental changes in a the transition zone between the northern North Atlantic and the central Arctic Ocean, and to determine experimentally the factors controlling deep-sea biodiversity, the Alfred- Wegener-Institute for Polar and Marine Research (AWI) established the deep-sea long-term observatory HAUSGARTEN, which constitutes the first, and until now only open-ocean long-term station in a polar region. Virtually undisturbed sediment samples have been taken using a video-guided multiple corer (MUC) at 13 HAUSGARTEN stations along a bathymetric (1,000 - 4,000 m water depth) and a latitudinal transect in 2,500 m water depth as well as two stations at 230 and 1,200 m water depth within the framework of the KONGHAU project. Various biogenic sediment compounds were analyzed to estimate the input of organic matter from phytodetritus sedimentation, benthic activities (e.g. bacterial exoenzymatic activity), and the total biomass of the smallest sediment-inhabiting organisms (size range: bacteria to meiofauna).
DOI: 10.1594/pangaea.744648
title: Biochemical investigation of multicorer sediment profile PS70/184-1
DOI: 10.1594/pangaea.811649
title: Bacterial abundance and biomass of multicorer sediment profile PS76/141-1
DOI: 10.1594/pangaea.855471
title: Biogenic particle flux at AWI HAUSGARTEN central station HGIV from mooring FEVI20
DOI: 10.1594/pangaea.400976
title: Biochemical investigation of multicorer sediment profile PS66/108-1
DOI: 10.1594/pangaea.884601
title: Bacteria, meiofauna and macrofauna density and macrofauna biomass in the HAUSGARTEN area (Fram Strait) in 2015 (POLARSTERN cruise PS93.2)

description: During PS93.2 (in 2015) bacteria density, meiofauna density, macrofauna density and macrofauna biomass was determined. For the bacterial density determination, sediment subsamples were taken with modified syringes (1.17 cm² cross-sectional area) from MUC recovered sediment cores and from benthic chambers. The first centimetre of each sample was stored in a 2 % filtered formalin solution at 4 °C. The acridine orange direct count (AODC) method (Hobbie et al., 1977) was used to stain bacteria in the subsamples and subsequently bacteria were counted with a microscope (Axioskop 50, Zeiss) under UV-light (CQ-HXP-120, LEj, Germany). For the determination of the meiofauna density and identification of meiofauna taxa, sediment subsamples were taken with modified syringes (3.14 cm² cross-sectional area) from MUC recovered sediment cores. The first centimetre of each sample was stored in borax buffered 4 % formaldehyde solution at 4 °C. The samples were sieved over a 1000 µm and 32 µm mesh. Both fractions were centrifuged three times in a colloidal silica solution (Ludox TM-50) with a density of 1.18 g/cm³ and stained with Rose 20 Bengal (Heip et al., 1985). Afterwards, the taxa were identified and counted. Foraminifera are not considered, as the extraction efficiency of Ludox for different groups of foraminifera is insufficient for a quantitative assessment of the group. Therefore, only metazoan meiofauna is recorded. After taking subsamples for bacteria and meiofauna densities, the remaining sediment from MUC recovered sediment cores and from the benthic chambers was used for macrofauna taxonomical identification, and density and biomass determination. For these macrofauna analyses only the 0-5 cm horizon from MUC sediment cores and the entire remaining sediment from the benthic chambers was used, sieved over a 500 µm mesh and stored in borax buffered 4 % formaldehyde and stained with Rose Bengal (Heip et al., 1985). Afterwards, macrofauna taxa were identified to the highest taxonomic level, counted and weighted (blotted wet weight).
DOI: 10.1594/pangaea.861857
title: Physical oceanography and current meter data from mooring FEVI29 at Hausgarten North

description: Gear ID: 1, SBE37, SN 9473; Gear ID: 2, RCM9/11, SN 326; Gear ID: 3, RCM9/11, SN 418; Gear ID: 4, RCM9/11, SN 480; Gear ID: 5, RCM9/11, SN 481
DOI: 10.1594/pangaea.883639
title: Bioturbation potential in the HAUSGARTEN area (Fram Strait) in 2015 (POLARSTERN cruise PS93.2)

description: During PS85 (in 2014) and PS93.2 (in 2015) sediment cores were recovered by a Multiple corer. Further, autonomous benthic lander were deployed at the HAUSGARTEN stations HG I and HG IV. The lander was equipment with benthic chambers, which were also able to recover sediment.The first five centimetres of the sediment core was sieved over a 500 µm mesh and stored in borax buffered 4 % formaldehyde and stained with Rose Bengal after Heip et al., 1985. Afterwards, macrofauna taxa were identified to the highest taxonomic level, counted and weighted (blotted wet weight). Based on macrofauna community density and biomass data, the bioturbation potential was calculated after Queirios et al. (2011).
DOI: 10.1594/pangaea.811309
title: Biochemical investigation of multicorer sediment profile PS76/129-4

description: Erratum (2019-08-08): Parameter name correction from "Carbon, organic, particulate [%]" to "Carbon, organic, total [%]"
DOI: 10.1594/pangaea.883785
title: Size-frequency-distributions (gel particle-bacteria and gel particle-gel particle) at western AWI HAUSGARTEN in 2015 (CTD, PS93/058-8 and PS93/058-1)
DOI: 10.1594/pangaea.785294
title: Meiobenthic taxon counts from deep-sea in situ recolonization experiment I deployed at station PS64/474-1 during ARK-XIX/3c

description: Results derive from meiobenthic investigations of artificial sediments deployed in containers at the deep-sea floor. Meiobenthic densities of five size classes are given in relation to a sediment volume of 3.24/cm**3.
DOI: 10.1594/pangaea.811948
title: Biochemical investigation of multicorer sediment profile PS68/238-3
DOI: 10.1594/pangaea.870897
title: Pollen profile of sediment core BK-8

description: Organic matter deposited in ancient, ice-rich permafrost sediments is vulnerable to climate change and may contribute to the future release of greenhouse gases; it is thus important to get a better characterization of the plant organic matter within such sediments. From a Late Quaternary permafrost sediment core from the Buor Khaya Peninsula, we analysed plant-derived sedimentary ancient DNA (sedaDNA) to identify the taxonomic composition of plant organic matter, and undertook palynological analysis to assess the environmental conditions during deposition. Using sedaDNA, we identified 154 taxa and from pollen and non-pollen palynomorphs we identified 83 taxa. In the deposits dated between 54 and 51 kyr BP, sedaDNA records a diverse low-centred polygon plant community including recurring aquatic pond vegetation while from the pollen record we infer terrestrial open-land vegetation with relatively dry environmental conditions at a regional scale. A fluctuating dominance of either terrestrial or swamp and aquatic taxa in both proxies allowed the local hydrological development of the polygon to be traced. In deposits dated between 11.4 and 9.7 kyr BP (13.4-11.1 cal kyr BP), sedaDNA shows a taxonomic turnover to moist shrub tundra and a lower taxonomic richness compared to the older samples. Pollen also records a shrub tundra community, mostly seen as changes in relative proportions of the most dominant taxa, while a decrease in taxonomic richness was less pronounced compared to sedaDNA. Our results show the advantages of using sedaDNA in combination with palynological analyses when macrofossils are rarely preserved. The high resolution of the sedaDNA record provides a detailed picture of the taxonomic composition of plant-derived organic matter throughout the core, and palynological analyses prove valuable by allowing for inferences of regional environmental conditions.
description: Supplement to: Zimmermann, Heike Hildegard; Raschke, Elena; Epp, Laura Saskia; Stoof-Leichsenring, Kathleen Rosmarie; Schwamborn, Georg; Schirrmeister, Lutz; Overduin, Pier Paul; Herzschuh, Ulrike (2017): Sedimentary ancient DNA and pollen reveal the composition of plant organic matter in Late Quaternary permafrost sediments of the Buor Khaya Peninsula (north-eastern Siberia). Biogeosciences, 14(3), 575-596
DOI: 10.1594/pangaea.885613
title: Water chemistry of sediment pore water during an in situ experiment with addition of Thalassiosira sp. and E. huxleyi phytodetritus at AWI-HAUSGARTEN S2 in 2013
DOI: 10.1594/pangaea.885616
title: Total oxygen uptake of sediment during an in situ experiment with addition of Thalassiosira sp. and E. huxleyi phytodetritus at AWI-HAUSGARTEN S2 in 2013
DOI: 10.1594/pangaea.615723
title: Sea-bed photographs (benthos) from the AWI-Hausgarten area along OFOS profile PS66/106-1
DOI: 10.1594/pangaea.615725
title: Sea-bed photographs (benthos) from the AWI-Hausgarten area along OFOS profile PS66/127-4
DOI: 10.1594/pangaea.400973
title: Biochemical investigation of multicorer sediment profile PS66/100-2
DOI: 10.1594/pangaea.884606
title: Total oxygen fluxes in the HAUSGARTEN area (Fram Strait) in 2014 (POLARSTERN cruise PS85)

description: For ex situ total oxygen uptake (TOU) measurements, sediment cores recovered by a MUC were used. The sediment cores were closed airtight with no air bubbles in the overlying water. The distance between the SWI and the edge of the lid was measured for volume calculations of the overlying water. An optical oxygen microsensor (Pyroscience, Aachen, Germany) with a tip size diameter of 50 µm was installed in the lid, allowing a continuous measurement of the oxygen concentration in the overlying water. The sediment cores were incubated in darkness for &gt;40 h and the overlying water was kept homogenised by rotating magnets over that period. For in situ TOU measurements, benthic chambers (K/MT 110, KUM, Kiel, Germany) with an inner dimension of 20x20 cm were used. These chambers were attached at autonomous benthic lander and were pushed into the sediment and thereby enclosed a sediment volume of approximately 8 L and an overlying water volume of approximately 2-3 L. The oxygen concentration was measured in the overlying water continuously with an Aanderaa optode (4330, Aanderaa Instruments, Norway, two-point calibrated as described in the upper section) over an incubation period of 20-48 h. During the measurement, the overlying water was kept homogenised by a stirring cross at the inner top of the chamber. TOU from both ex situ sediment core and in situ benthic chamber incubations were calculated using TOU = dO2 x V/ dt x A, in which dO2, dt, V and A represent the difference in oxygen concentration, the difference in time, the volume of the overlying water and the enclosed surface area, respectively.
DOI: 10.1594/pangaea.885609
title: Bacterial fatty acids during an in situ experiment with addition of Thalassiosira sp. and E. huxleyi phytodetritus at AWI-HAUSGARTEN S2 in 2013
DOI: 10.1594/pangaea.744672
title: Biochemical investigation of multicorer sediment profile PS72/160-2
DOI: 10.1594/pangaea.856915
title: Abundance of benthic megafauna at OFOS station PS78/143-2 (IV)
DOI: 10.1594/pangaea.883783
title: Size-frequency-distributions (gel particle-bacteria and gel particle-gel particle) at northern AWI HAUSGARTEN in 2015 (CTD, PS93/064-4 and PS93/063-1)
DOI: 10.1594/pangaea.903947
title: Biochemical investigation of multicorer sediment profile PS85/469-2

description: To detect and track the impact of large-scale environmental changes in a the transition zone between the northern North Atlantic and the central Arctic Ocean, and to determine experimentally the factors controlling deep-sea biodiversity, the Alfred- Wegener-Institute for Polar and Marine Research (AWI) established the deep-sea long-term observatory HAUSGARTEN, which constitutes the first, and until now only open-ocean long-term station in a polar region. Virtually undisturbed sediment samples have been taken using a video-guided multiple corer (MUC) at 13 HAUSGARTEN stations along a bathymetric (1,000 - 4,000 m water depth) and a latitudinal transect in 2,500 m water depth as well as two stations at 230 and 1,200 m water depth within the framework of the KONGHAU project. Various biogenic sediment compounds were analyzed to estimate the input of organic matter from phytodetritus sedimentation, benthic activities (e.g. bacterial exoenzymatic activity), and the total biomass of the smallest sediment-inhabiting organisms (size range: bacteria to meiofauna).
DOI: 10.1594/pangaea.744668
title: Biochemical investigation of multicorer sediment profile PS72/145-3
DOI: 10.1594/pangaea.811645
title: Bacterial abundance and biomass of multicorer sediment profile PS76/132-2
DOI: 10.1594/pangaea.269060
title: Biochemical investigation of multicorer sediment profile PS64/453-1

description: Depth, sediment = habitat depth
DOI: 10.1594/pangaea.269076
title: Biochemical investigation of multicorer sediment profile PS57/168-2

description: Depth, sediment = habitat depth
DOI: 10.1594/pangaea.269082
title: Biochemical investigation of multicorer sediment profile PS57/252-1

description: Depth, sediment = habitat depth
DOI: 10.1594/pangaea.744604
title: Biochemical investigation of multicorer sediment profile MSM02/773-1
DOI: 10.1594/pangaea.744660
title: Biochemical investigation of multicorer sediment profile PS72/125-2
DOI: 10.1594/pangaea.400978
title: Biochemical investigation of multicorer sediment profile PS66/113-2
DOI: 10.1594/pangaea.400981
title: Biochemical investigation of multicorer sediment profile PS66/121-2
DOI: 10.1594/pangaea.269062
title: Biochemical investigation of multicorer sediment profile PS64/471-1

description: Depth, sediment = habitat depth
DOI: 10.1594/pangaea.615787
title: Sea-bed photographs (benthos) from the AWI-Hausgarten area along OFOS profile PS62/191-1
DOI: 10.1594/pangaea.744609
title: Biochemical investigation of multicorer sediment profile MSM02/791-1
DOI: 10.1594/pangaea.744646
title: Biochemical investigation of multicorer sediment profile PS70/179-1
DOI: 10.1594/pangaea.811408
title: Biochemical investigation of multicorer sediment profile PS78/159-4

description: Erratum (2019-08-08): Parameter name correction from "Carbon, organic, particulate [%]" to "Carbon, organic, total [%]"
DOI: 10.1594/pangaea.615786
title: Sea-bed photographs (benthos) from the AWI-Hausgarten area along OFOS profile PS62/170-3
DOI: 10.1594/pangaea.883500
title: Ex situ measured oxygen profiles from station PS93/080-9 (HG I) within the HAUSGARTEN area (Fram Strait) in 2015 (POLARSTERN cruise PS93.2)

description: During PS85 (in 2014) and PS93.2 (in 2015) sediment cores were recovered by a Multiple corer. Sediment cores were stored at in situ temperature of -0.75°C and used to measure oxygen profiles across the sediment-water interface with needle type optodes (diameter: 50µm, Pyro Science). By using the profiles, the diffusive oxygen uptake was calculated via the decrease in the oxygen concentration in the Diffusive Boundary Layer (DBL). For a further description of the calculation, please check the related publication.
DOI: 10.1594/pangaea.615386
title: Sea-bed photographs (benthos) from the AWI-Hausgarten area along OFOS profile PS66/099-1
DOI: 10.1594/pangaea.744614
title: Biochemical investigation of multicorer sediment profile MSM02/864-1
DOI: 10.1594/pangaea.856911
title: Counts of benthic megafauna at OFOS station PS78/182-1 (S3)
DOI: 10.1594/pangaea.856916
title: Abundance of benthic megafauna at OFOS station PS78/171-1 (N3)
DOI: 10.1594/pangaea.883555
title: In situ measured oxygen profiles from station PS93/080-8 (HG I) within the HAUSGARTEN area (Fram Strait) in 2015 (POLARSTERN cruise PS93.2)

description: During PS85 (in 2014) and PS93.2 (in 2015) autonomous benthic lander were deployed at the HAUSGARTEN stations HG I and HG IV. The lander was equipment with a profiler unit, which holds electrochemical, needly type oxygen sensors in order to measure oxygen profiles across the sediment-water interface. By using the profiles, the diffusive oxygen uptake was calculated via the decrease in the oxygen concentration in the Diffusive Boundary Layer (DBL). For a further description of the calculation, please check the related publication.
DOI: 10.1594/pangaea.883638
title: Bioturbation potential in the HAUSGARTEN area (Fram Strait) in 2014 (POLARSTERN cruise PS85)

description: During PS85 (in 2014) and PS93.2 (in 2015) sediment cores were recovered by a Multiple corer. Further, autonomous benthic lander were deployed at the HAUSGARTEN stations HG I and HG IV. The lander was equipment with benthic chambers, which were also able to recover sediment.The first five centimetres of the sediment core was sieved over a 500 µm mesh and stored in borax buffered 4 % formaldehyde and stained with Rose Bengal after Heip et al., 1985. Afterwards, macrofauna taxa were identified to the highest taxonomic level, counted and weighted (blotted wet weight). Based on macrofauna community density and biomass data, the bioturbation potential was calculated after Queirios et al. (2011).
DOI: 10.1594/pangaea.830178
title: Palynomorphs from the Lateglacial and Holocene of the Mt-Athos Basin, Aegean Sea

description: To unravel the climatic and environmental dynamics in the borderlands of the Aegean Sea during the early and middle Holocene, and notably for the interval of sapropel S1 (S1) formation, we have analysed terrestrial palynomorphs from a marine core in the northern Aegean Sea. The qualitative results were complemented by quantitative pollen-based climate reconstructions. A land-sea correlation was established based on pollen data and sediment lightness measurements from the same core, and previously published benthic foraminifer data from a nearby core.The borderlands of the Aegean Sea underwent a transition from an open vegetation to oak-dominated woodlands between ~10.4 and ~9.5 ka cal BP. A coeval increase in winter precipitation suggests that moisture availability was the main factor controlling Holocene reforestation. The ~50% higher winter precipitation during S1 formation relative to "pre-sapropelic" conditions suggests a strong contribution from the borderlands of the Aegean Sea to the freshwater surplus during S1 formation. The humid and mild winter conditions during S1 formation were repeatedly punctuated by short-term climatic events that caused a partial deforestation and a reorganisation within the broad-leaved arboreal vegetation. In the marine realm, these events are documented by improved benthic oxygenation. The strongest event represents the regional expression of the 8.2 ka cold event and led to an interruption in S1 formation. Except for the interval of S1 formation, the pollen-derived winter temperatures correlate with the smoothed GISP2 K+ series. They support the previously published, marine-based concept that the intensity of the Siberian High strongly controlled the winter climate in the Aegean region. During S1 formation in the Aegean Sea, however, climate conditions in the borderlands were more strongly affected by the monsoonally influenced climate system of the lower latitudes.
description: The files contain palynomorph (mainly pollen and dinocysts) data from a marine archive from the Northern Aegean Sea. Core GeoTü SL152 was retrieved during Meteor Cruise 51/3 and covers the last ca. 21 ka (depths: 6,70 m).
description: Supplement to: Kotthoff, Ulrich; Pross, Jörg; Müller, Ulrich C; Peyron, Odile; Schmiedl, Gerhard; Schulz, Hartmut; Bordon, Amandine (2008): Climate dynamics in the borderlands of the Aegean Sea during formation of sapropel S1 deduced from a marine pollen record. Quaternary Science Reviews, 27(7-8), 832-845