cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/rx29te
title: Total foraminifera counts during METEOR cruise M36/5
DOI: 10.15468/5csmbk
title: (Table 2) Megafauna density 2002, 2004 and 2007 in the deep-sea observatory AWI-HAUSGARTEN, Fram Strait

description: Although megafaunal organisms play an important role in deep benthic ecosystems and contribute significantly to benthic biomass in the Arctic little is known about their temporal dynamics. Here, we assessed the interannual dynamics of megafaunal organisms from the HAUSGARTEN observatory in the Fram Strait, an area where the effects of climatic forcing are particularly evident. We analysed three congruent camera transects taken in 2002, 2004 and 2007. Environmental parameters were measured in order to be able to put our faunal results into an environmental context. Our results indicate that although the densities of megafaunal species show different patterns over time, most exhibit an overall decrease between 2002 and 2007 and total megafaunal densities decreased regularly from 2002 to 2004 to 2007 (12.16 +/- 0.96 to 7.41 +/- 0.43 ind/m**2). This concurs with a steady increase in bottom-water temperatures and a decrease in the total organic content and microbial biomass of surficial sediments at the same time period. Although suspension feeder densities also decreased, predator/scavenger and deposit feeder densities have declined to such an extent that suspension feeders accounted for almost 100% of the megafauna in 2007. It could thus be argued that the trophic diversity at the central HAUSGARTEN station (2500 m) has decreased. Temperature-related changes in the production of the surface layers may lead to changes in the quality and/or quantity of particles exported to the deep seafloor. The densities of deposit feeders (i.e. holothurians) peaked (1.14 +/- 0.13 ind/m**2) in 2004, the year following the longest ice cover. These results indicate the importance of ice-related export of particles to the deep seafloor and highlight the need for time-series transects, especially in an era when productive marginal ice zones tend to disappear with the receding sea ice. Although there is a general consensus that the Arctic is in a transition towards a warmer state, only continued observation will allow us to assess if the interannual changes observed are a result of decadal cycles related to the Arctic and North Atlantic Oscillation or if they are indicators of long-term change.
DOI: 10.15468/rtjjz6
title: Plasm bearing foraminifera counts during METEOR cruise M36/5
DOI: 10.15468/mz5bwj
title: (Table 2) Species density and composition of an inshore and offshore station in Kongsfjord, Svalbard

description: Megafauna plays an important role in benthic ecosystems and contributes significantly to benthic biomass in the Arctic. The distribution is mostly studied using towed cameras. Here, we compare the megafauna from two sites located at different distances from the Kongsfjord: one station at the entrance to the fjord, another on the outer shelf. Although they are only located 25 km apart and at comparable depth, there were significant differences in their species composition. While the inshore station was characterized by shrimps (2.57 +/- 2.18 ind./m**2) and brittlestars (3.21 +/- 3.21 ind./m**2), the offshore site harboured even higher brittlestar densities (15.23 +/- 9.32 ind./m**2) and high numbers of the sea urchin Strongylocentrotus pallidus (1.23 +/- 1.09 ind./m**2). Phytodetrital concentrations of the upper sediment centimetres were significantly higher inshore compared with offshore. At a smaller scale, there were also differences in the composition of different transect sections. Several taxa were characterized by a patchy distribution along transects. We conclude that these differences were caused primarily by habitat characteristics. The seafloor inshore was characterized by glacial soft sediments, whereas the station offshore harboured large quantities of stones. Although the use of a new web-2.0-based tool, BIIGLE (http://www.BIIGLE.de), allowed us to analyse more images (~90) than could have been achieved by hand, taxon area curves indicated that the number of images analysed was not sufficient to capture the species inventory fully. New automated image analysis tools would enable a rapid analysis of larger quantities of camera footage.
DOI: 10.15468/d3w9dt
title: (Appendix A) Planktonic foraminifera abundances in ODP Site 130-807B
DOI: 10.15468/v334s7
title: (Appendix A) Planktonic foraminifera abundances in ODP Site 138-852B
DOI: 10.15468/zz6s2f
title: (Appendix A) Planktonic foraminifera abundances in ODP Site 138-847B
DOI: 10.15468/nxy9dt
title: (Appendix A) Planktonic foraminifera abundances in ODP Site 130-806B
DOI: 10.15468/gqwyue
title: (Appendix) Planktonic foraminifera abundances in ODP Site 138-847B

description: Sediments from Site 847 in the eastern equatorial Pacific Ocean provide a record of the variability of the equatorial divergence and associated upwelling. We interpret the variation in foraminifer assemblages in the context of regional Oceanographic change. Our record is composed of three time slices selected from the last 0.9 Ma. A Q-mode analysis of foraminifer abundance data results in a four-factor model that was used to quantify the faunal changes and to characterize paleoceanographic variability. The species of foraminifers with high factor scores for each factor suggested a specific set of Oceanographic conditions. The timing of the high loadings for each factor appears to be associated with a particular part of a glacial cycle. Thus, we interpreted our findings in the context of the glacial/interglacial cycle proposed by Imbrie et. al. (1992). This idealized cycle consists of four stages that are defined by characteristic changes in specific elements of the climate system. We evaluated how such changes in the climate system might affect the Oceanographic conditions at Site 847. Our results suggest that upwelling remains a dominant process in both glacial and interglacial stages, but decreases significantly on most deglacials. Subantarctic mode water formation and equatorial upwelling appear to form a linked system that determines the specific characteristics of the water forming a major part of the Equatorial Undercurrent as well as the transport volume of the undercurrent. In conjunction with changes in upwelling at Site 847, this variation in the undercurrent results in changes in mixed layer depth, sea-surface temperature, and oxygen and nutrient levels at the site.
DOI: 10.15468/shqr8u
title: (Appendix B1) Palynological counts in surface sediments of cores taken in the North Pacific
DOI: 10.15468/j4exsv
title: (Appendix A) Dinoflagellate counts in surface sediments of cores taken in the North Pacific
DOI: 10.15468/8sz828
title: (Appendix A) Abundance of selected coccolithophores in sediment core DS97-2P, North Atlantic

description: The calcareous nannofossil assemblages from sediment core DS97-2P from the Reykjanes Ridge have been investigated to document oceanographic changes in surface water during the Holocene. The recorded variations in coccolithophore species assemblages and accumulation rates indicate that the region was subjected to rapid changes of surface water masses throughout the entire Holocene. Coccolithophore assemblages generally are of low species diversity and consist mainly of Emiliania huxleyi and Coccolithus pelagicus ssp. pelagicus. Two major events occurred at 8.5-7 ka and at 4.5-3.5 ka, showing higher coccolith accumulation rates, suggesting that the influence of relatively warm Atlantic waters via the Irminger Current was strong in the investigated area. The coccolithophore assemblages have been compared with diatom, foraminifer and sedimentological records within the same core. These data, supported by a comparison with previously published proxy records, add credit to the hypothesis that Holocene changes did not occur uniformly across the North Atlantic. The results have highlighted the Holocene pattern in the North Atlantic, as a period influenced by strong regionalism with discrepancies in the hydrographical trends and in the distribution of the planktonic proxies.
DOI: 10.15468/9n2bdy
title: (Table 2) Expected and observed beluga (Delphinapterus leucas) sightings according to habitat characteristics
DOI: 10.15468/kvmjtn
title: (Table 1) Beluga (Delphinapterus leucas) sightings in the eastern Beaufort Sea
DOI: 10.15468/m2jkuy
title: (Supplement 1) Most common taxa or groups of coccoliths from ODP Site 1233 (past dataset) covering the last 70 kyr
DOI: 10.15468/kdu29k
title: Distribution of planktic foraminifera in ODP Site 202-1240 samples
DOI: 10.15468/2xk2ha
title: Zooplankton abundance measured on water bottle samples during Jan Mayen cruise JM8
DOI: 10.15468/ngncyq
title: Zooplankton abundance measured on water bottle samples during Jan Mayen cruise JM7
DOI: 10.15468/55gpjk
title: Zooplankton abundance measured on water bottle samples during Jan Mayen cruise JM6
DOI: 10.15468/u7p9tg
title: Zooplankton abundance measured on water bottle samples during Jan Mayen cruise JM5
DOI: 10.15468/e6h9vw
title: Zooplankton abundance measured on water bottle samples during Jan Mayen cruise JM4
DOI: 10.15468/7atxek
title: Zooplankton abundance measured on water bottle samples during Jan Mayen cruise JM3
DOI: 10.15468/crpmn5
title: Zooplankton abundance measured on water bottle samples during Jan Mayen cruise JM2
DOI: 10.15468/dnqnbn
title: Zooplankton abundance measured on water bottle samples during Jan Mayen cruise JM1
DOI: 10.15468/h72xd7
title: Phytoplankton abundance measured on water bottle samples during Jan Mayen cruise JM8
DOI: 10.15468/ppy2ke
title: Phytoplankton abundance measured on water bottle samples during Jan Mayen cruise JM7
DOI: 10.15468/3ktgeu
title: Phytoplankton abundance measured on water bottle samples during Jan Mayen cruise JM6
DOI: 10.15468/ms432n
title: Phytoplankton abundance measured on water bottle samples during Jan Mayen cruise JM5
DOI: 10.15468/ahhyma
title: Phytoplankton abundance measured on water bottle samples during Jan Mayen cruise JM4
DOI: 10.15468/vk6k44
title: Phytoplankton abundance measured on water bottle samples during Jan Mayen cruise JM3
DOI: 10.15468/6xdbsc
title: Benthic megafauna abundance in deep sea (Central Arctic) collected during POLARSTERN cruise ARK-XXVII/3 (IceArc)
DOI: 10.15468/5hfgpq
title: Phytoplankton abundance measured on water bottle samples during Jan Mayen cruise JM2
DOI: 10.15468/asyza6
title: Phytoplankton abundance measured on water bottle samples during Jan Mayen cruise JM1
DOI: 10.15468/ghjwtz
title: Succession of benthic hard-bottom communities abundance at station Errina2012_MDD4
DOI: 10.15468/9rnghx
title: Succession of benthic hard-bottom communities abundance at station Errina2012_MDD7
DOI: 10.15468/fxxwn2
title: Succession of benthic hard-bottom communities abundance at station Errina2012_MDD3
DOI: 10.15468/rxaxcm
title: Succession of benthic hard-bottom communities abundance at station Errina2012_IS_solar3
DOI: 10.15468/3jksjz
title: Succession of benthic hard-bottom communities abundance at station Errina2012_IS_solar2
DOI: 10.15468/4wknfu
title: Succession of benthic hard-bottom communities abundance at station Errina2012_IS_solar1
DOI: 10.15468/v4txps
title: Succession of benthic hard-bottom communities abundance at station Errina2012_CS
DOI: 10.15468/za7ncq
title: Succession of benthic hard-bottom communities abundance at station Errina2012_AG
DOI: 10.15468/buaevg
title: (Table 1) Abundance of ciliates, dinoflagellates, nauplii and krill at different stations in the Godthabsfjord
DOI: 10.15468/kvuj96
title: (Table S1) Distribution of Florisphaera profunda in surface sediment samples
DOI: 10.15468/9pwuf7
title: Relative abundance of planktic foraminifer Globigerinita uvula in sediment core PS1243-1
DOI: 10.15468/gj39x9
title: Relative abundance of Beella megastoma ( &gt;250 µm) in sediment core PS1243-1
DOI: 10.15468/tu3rqp
title: Relative abundances of Florisphaera profunda and Helicosphaera carteri during the sapropel S5 of sediment core MD81-LC21
DOI: 10.15468/23q4en
title: Abundance of phytoplankton in surface water during THALASSA campaign PROSOPE
DOI: 10.6084/m9.figshare.19277672
title: ijgi_data

description: open access data and code
DOI: 10.6084/m9.figshare.19277672.v1
title: ijgi_data

description: open access data and code
DOI: 10.15468/cucmub
title: Relative abundance of T. quinqueloba in sediment core PS1243-1
DOI: 10.15468/x88hj6
title: Phytoplankton measured on water bottle samples during THALASSA cruise PROSOPE
DOI: 10.15468/cuzkv8
title: (Tab. 9.D) Presence and abundance of benthic fauna at station FINO 1 in 2005
DOI: 10.15468/2e67ja
title: (Tab. 9.B) Presence and abundance of benthic fauna at station FINO 1 in 2005-2007
DOI: 10.15468/jj27w9
title: (Tab. 9.C) Presence and abundance of benthic fauna at station FINO 1 in 2005-2007
DOI: 10.15468/eku6v6
title: (Table 1) Foraminifera abundance of ODP Hole 162-985A sediments

description: The stratigraphic distribution of deep-water agglutinated foraminifers was examined using 50 samples from Ocean Drilling Program (ODP) Hole 985A, drilled on the gentle slope of the Iceland Plateau in the Norwegian Basin. A total of 40 species and generic groupings was determined in this study. Three stratigraphically meaningful assemblages are recognized in Hole 985A: a basal assemblage with coarsely agglutinated forms (Cores 162-985A-62X through 50X), a Spirosigmoilinella compressa assemblage (Cores 162-985A-49X through 40X), and a sparse assemblage with pyritized radiolarians in the uppermost part of the studied interval (Cores 162-985A-39X through 32X). The whole succession from the base of Hole 985A to Core 162-985A-32X is here assigned to the Dorothia siegliei-Rotaliatina bulimoides Zone of Oligocene age. The stratigraphic ranges of several species extended into younger strata compared with biostratigraphic records from the Vøring Slope (ODP Hole 643A) and from an exploration well on the Vøring Plateau. Taxonomic differences between the foraminiferal records of the Norwegian Sea and the deep Labrador Sea provide evidence for faunal isolation of the deep Norwegian basin during the Oligocene. This isolation is attributed to limited marine connections across the Greenland-Scotland Ridge, resulting in Norwegian Sea deep water that was corrosive and poorly ventilated. Foraminiferal evidence suggests that Norwegian Sea deep water was poorly oxygenated during the Oligocene.
DOI: 10.7294/19241844
title: SpaceDrones Labeled Training Images and Results

description: Labeled RGB image data of both real world and synthetic environments of orbital;/space platforms for the purposes of supervised machine learning training to enable autonomous robotic tasking.
DOI: 10.15468/8rumn6
title: (Table 1) Relative abundance of planktonic foraminifers in ODP Hole 164-997A sediments

description: Hole 997A was drilled during Leg 164 of the Ocean Drilling Program at a depth of 2770 m on the topographic crest of the Blake Ridge in the western Atlantic Ocean. We report here an analysis of the faunal assemblages of planktonic foraminifers in a total of 91 samples (0.39-91.89 mbsf interval) spanning the last 2.15 m.y., latest Pliocene to Holocene. The abundant species, Globigerinoides ruber, Globigerinoides sacculifer, Neogloboquadrina dutertrei, Globorotalia inflata, and Globigerinita glutinata together exceed over ~70% of the total fauna. Each species exhibits fluctuations with amplitudes of 10%-20% or more. Despite their generally low abundance, the distinct presence/absence behavior of the Globorotalia menardii group is almost synchronous with glacial-interglacial climate cycles during the upper part of Brunhes Chron. The quantitative study and factor analysis of planktonic foraminiferal assemblages shows that the planktonic foraminiferal fauna in Hole 997A consists of four groups: warm water, subtropical gyre (mixed-layer species), gyre margin (thermocline/upwelling species), and subpolar assemblages. The subtropical gyre assemblage dominates throughout the studied section, whereas the abundance of gyre margin taxa strongly control the overall variability in faunal abundance at Site 997. In sediments older than the Olduvai Subchron, the planktonic foraminiferal faunas are characterized by fluctuations in both the subtropical gyre and gyre margin assemblages, similar to those in the Brunhes Chron. The upwelling/gyre margin fauna increased in abundance just before the Jaramillo Subchron and was dominant between 0.7 and 1.07 Ma. The transition from this gyre margin-dominated assemblage to an increase in abundance of the subtropical gyre and gyre margin species occurred around 0.7 Ma, near the Brunhes/Matuyama boundary. The presence of low-oxygen-tolerant benthic foraminifers, pyrite tubes, and abundant diatoms below the Brunhes/Matuyama boundary suggests decreased oxygenation of intermediate waters and more upwelling over the Blake-Bahama Outer Ridge, perhaps because of weaker Upper North Atlantic Deep Water ventilation. The changes in the relative composition of foraminifer assemblages took place at least twice, around 700 and 1000 ka, close to the ~930-ka switch from obliquity-forced climate variation to the 100-k.y. eccentricity cycle. The climate shift at 700 ka suggests a transition from relatively warmer conditions in the early Pleistocene to warm-cool oscillations in the Brunhes Chron.
DOI: 10.15468/nthfue
title: (Table 2) Calcareous nannofossil abundance in ODP Hole 164-994C sediments
DOI: 10.15468/brycvq
title: Succession of benthic hard-bottom communities abundance at X-Huinay, Comau Fjord, Chile, in 2012
DOI: 10.15468/smdy6a
title: Succession of benthic hard-bottom communities abundance at X-Huinay, Comau Fjord, Chile, in 2010
DOI: 10.15468/7t2zqc
title: Succession of benthic hard-bottom communities abundance at X-Huinay, Comau Fjord, Chile, in 2011
DOI: 10.15468/8sfbb2
title: Succession of benthic hard-bottom communities abundance at Liliguapi, Paso Comau, Chile, in 2012
DOI: 10.15468/yaqnnj
title: Succession of benthic hard-bottom communities abundance at Liliguapi, Paso Comau, Chile, in 2011
DOI: 10.15468/uwq4qc
title: Benthic hard-bottom communities abundance at X-Huinay, Comau Fjord, Chile, in 2012
DOI: 10.15468/fwgg8b
title: Benthic hard-bottom communities abundance at X-Huinay, Comau Fjord, Chile, in 2010
DOI: 10.15468/wvtys9
title: Succession of benthic hard-bottom communities abundance at Liliguapi, Paso Comau, Chile, in 2010
DOI: 10.15468/fquw2p
title: Benthic hard-bottom communities abundance at Liliguapi, Paso Comau, Chile, in 2012
DOI: 10.15468/e6ymw6
title: Benthic hard-bottom communities abundance at Liliguapi, Paso Comau, Chile, in 2011
DOI: 10.15468/ch3qvj
title: Benthic hard-bottom communities abundance at Liliguapi, Paso Comau, Chile, in 2010
DOI: 10.15468/5bsr25
title: (Supplement 3) Dinoflagellate cyst concentrations of the three transects OMZ (GeoB 12312, 12321, 12331), below-OMZ-seep (GeoB 12326), and OMZ-seep (GeoB 12328)
DOI: 10.15468/69hfkq
title: (Supplement 3) Dinoflagellate cyst count data by species of the three transects OMZ (GeoB 12312, 12321, 12331), below-OMZ-seep (GeoB 12326), and OMZ-seep (GeoB 12328)
DOI: 10.15468/z5gwqd
title: Macrofauna abundances from mesocosm experiments at eastern and western branches of the Whittard canyon
DOI: 10.15468/52ufdb
title: (Table 3) Benthic foraminiferal composition at DSDP Hole 84-565
DOI: 10.15468/kjpgwc
title: Detection histories for eight species of Amazona parrots in Venezuela during the NeoMaps bird surveys in 2010

description: Documenting changes in distribution is necessary for understanding species' response to environmental changes, but data on species distributions are heterogeneous in accuracy and resolution. Combining different data sources and methodological approaches can fill gaps in knowledge about the dynamic processes driving changes in species-rich, but data-poor regions. We combined recent bird survey data from the Neotropical Biodiversity Mapping Initiative (NeoMaps) with historical distribution records to estimate potential changes in the distribution of eight species of Amazon parrots in Venezuela. Using environmental covariates and presence-only data from museum collections and the literature, we first used maximum likelihood to fit a species distribution model (SDM) estimating a historical maximum probability of occurrence for each species. We then used recent, NeoMaps survey data to build single-season occupancy models (OM) with the same environmental covariates, as well as with time- and effort-dependent detectability, resulting in estimates of the current probability of occurrence. We finally calculated the disagreement between predictions as a matrix of probability of change in the state of occurrence. Our results suggested negative changes for the only restricted, threatened species, Amazona barbadensis, which has been independently confirmed with field studies. Two of the three remaining widespread species that were detected, Amazona amazonica, Amazona ochrocephala, also had a high probability of negative changes in northern Venezuela, but results were not conclusive for Amazona farinosa. The four remaining species were undetected in recent field surveys; three of these were most probably absent from the survey locations (Amazona autumnalis, Amazona mercenaria and Amazona festiva), while a fourth (Amazona dufresniana) requires more intensive targeted sampling to estimate its current status. Our approach is unique in taking full advantage of available, but limited data, and in detecting a high probability of change even for rare and patchily-distributed species. However, it is presently limited to species meeting the strong assumptions required for maximum-likelihood estimation with presence-only data, including very high detectability and representative sampling of its historical distribution.
DOI: 10.15468/yebqux
title: Meiofauna abundance of westerm Mediterranean Sea seep sediments
DOI: 10.15468/72mpt8
title: Meiofauna abundance of central Mediterranean Sea mud volcano sediments
DOI: 10.15468/sah44p
title: Nematode abundance in cold seep sediments of the Nordic Margins (Nyregga, Styregga, Haakon Mosby Mud Volcano)

description: Cold-seep environments and their associated symbiont-bearing mega faunal communities create islands of primary production for macro-and meiofauna in the otherwise monotonous and nutrient-poor deep-sea environment. To examine the spatial variation and distribution patterns of metazoan meiobenthos in different seepage-related habitats, samples were collected in two regions off Norway: several pockmarks associated with the Storegga Slide including the Nyegga pockmark area, and the active, methane-venting Haakon Mosby Mud Volcano west of the Barents Sea during the Vicking cruise aboard the RV ''PourquoiPas?'' in May-June 2006. Meiofaunal samples at control sites were sampled with a multiple corer, while the other sites were sampled with push cores operated by the ROV Victor6000.The meiofaunal samples were fixed in 4% buffered formaldehyde and washed over a 32 mm-mesh sieve. Metazoan meiofauna were extracted by density gradient centrifugation. All material was fixed with 4% buffered formalin and stained with Rose Bengal. The metazoan meiofauna was sorted out, enumerated and identified down to major taxa under the stereomicroscope. Afterwards, abundances of Nematodes were depth integrated over the top 5 cm to gain individual abundances per 10 cm**2.
DOI: 10.15468/bskppd
title: Nematode abundance of the Eastern Mediterranean Sea in cold seep sediments collected during the MEDECO2 cruise (2007)

description: Sediment was collected by either push cores operated by the ROV Quest or by a television guided Multicorer. Nematodes abundance were calculated of the top 5 cm of the sediment to gain individual abundance per 10 cm**2.
DOI: 10.15468/6uz6pg
title: Nematode abundance of the Eastern Mediterranean Sea in cold seep sediments collected during Maria S. Merain cruises MSM13/3 and MSM13/4 in 2009

description: Sediment was collected by either push cores operated by the ROV Quest or by a television guided Multicorer. Nematodes abundance were calculated of the top 5 cm of the sediment to gain individual abundance per 10 cm**2.