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  • 2020-2024  (165,471)
  • 2000-2004  (1,611,500)
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  • 1
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    New chromosome counts and other karyological data for members of the Stemonaceae (2021)
    Naturalis Biodiversity Center
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 66 no. 1, pp. 53-56
    Details
    Publication Date: 2024-05-18
    Description: Chromosome numbers and other karyological data for ten Stemona species and for Stichoneuron caudatum are presented, including first reports for Stemona burkillii, S. involuta, S. mairei and S. phyllantha.All investigated taxa of Stemona exhibit n = x = 7 (2n = 14) chromosomes. For Stichoneuron caudatum an earlier count revealing 2n = 18 is confirmed. The observed chromosome lengths range between 0.9 and 6.9 μm (largest chromosome in Stichoneuron caudatum).Additionally, the genome sizes of seven Stemona species and of Stichoneuron caudatum are reported. The obtained results are compared with literature data and discussed.
    Keywords: Plant Science ; Ecology ; Evolution ; Behavior and Systematics ; chromosome length ; chromosome number ; genome size ; karyology ; Stemona ; Stemonaceae ; Stichoneuron
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 2
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    Salvation and documentation: additional (probable) type material of South American land-snail species (Gastropoda, Stylommatophora) in the Museum für Naturkunde Berlin (2024)
    Conchological Society of Great Britain & Ireland
    In:  Journal of Conchology vol. 45 no. 1, pp. 1-14
    Details
    Publication Date: 2024-05-18
    Description: Type material of some South American species in the Museum für Naturkunde Berlin, belonging to different families is documented. It includes 16 species: Bulimus cuneus L. Pfeiffer, 1854, Bulimus proteus Broderip, 1832, Bulimus scalarioides L. Pfeiffer, 1867, Bulimus similaris J. Moricand, 1856, Andinia (Ehrmanniella) dedicata Weyrauch & Zilch, 1954, Helix hettneriana E. von Martens, 1897, Eurycampta hidalgonis Döring, 1877, Helix aequatoris L. Pfeiffer, 1860, Helix bituberculata L. Pfeiffer, 1853, Helix bourcieri L. Pfeiffer, 1853, Helix neogranadensis L. Pfeiffer, 1845, Cyclostoma (Cyclophorus) bourcieri L. Pfeiffer, 1854, and Helix platygyra Albers, 1857. The concept of the “salvation” of type material is explained.
    Keywords: Achatinidae ; Bulimulidae ; Clausiliidae ; Epiphragmophoridae ; Labyrinthidae ; Neocyclotidae ; Scolodontidae
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 3
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    Vulnerability of lowland and upland orchids in their spatially response to climate change and land cover change (2024)
    In:  Ecological Informatics vol. 80 no. 102534
    Details
    Publication Date: 2024-05-18
    Description: Climate change and land cover change often interactively affect plant species distributions. This study addresses the vulnerability of lowland and upland orchids to climate change and land cover change. Endemic orchids of New Guinea were grouped into four classes (lowland epiphyte, lowland terrestrial, upland epiphyte, upland terrestrial) based on their life form and elevation range. Forty occurrence records of endemic orchids were selected for each class, totaling 160 occurrence records. Ensemble modelling combining two machine learning algorithms was used to generate predictive current and future suitable areas for orchid classes. Model performance was evaluated using the AUC and TSS metrics. Suitable areas for both lowland and upland orchids (epiphyte and terrestrial) were predicted decrease in the future due to climate change and land cover change. The loss of suitable areas for upland terrestrial orchids was predicted to be most significant in the worst-case climate change scenario (SSP 5–8.5). Both lowland and upland orchids (epiphyte and terrestrial) tend to shift to higher elevation ranges from the present distributions. The predictive models have AUC values 〉0.90 and TSS value 〉0.80, indicating the models have excellent potential for predicting the impact of climate change and land cover change on orchid distributions.
    Keywords: Ensemble model ; Climate change ; Species distribution model ; Orchids ; Lowland ; Upland ; New Guinea
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 4
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    A Collagen10a1 mutation disrupts cell polarity in a medaka model for metaphyseal chondrodysplasia type Schmid (2024)
    Elsevier BV
    In:  iScience vol. 27 no. 109405
    Details
    Publication Date: 2024-05-18
    Description: Heterozygous mutations in COL10A1 lead to metaphyseal chondrodysplasia type Schmid (MCDS), a skeletal disorder characterized by epiphyseal abnormalities. Prior analysis revealed impaired trimerization and intracellular retention of mutant collagen type X alpha 1 chains as cause for elevated endoplasmic reticulum (ER) stress. However, how ER stress translates into structural defects remained unclear. We generated a medaka (Oryzias latipes) MCDS model harboring a 5 base pair deletion in col10a1, which led to a frameshift and disruption of 11 amino acids in the conserved trimerization domain. col10a1D633a heterozygotes recapitulated key features of MCDS and revealed early cell polarity defects as cause for dysregulated matrix secretion and deformed skeletal structures. Carbamazepine, an ER stress -reducing drug, rescued this polarity impairment and alleviated skeletal defects in col10a1D633a heterozygotes. Our data imply cell polarity dysregulation as a potential contributor to MCDS and suggest the col10a1D633a medaka mutant as an attractive MCDS animal model for drug screening.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 5
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    Abundance of the main protist groups in a subset of microscopy samples from leg 3 of the MOSAiC campaign (2024)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Description: The data sets originates from the weekly sampling events (MOSAiC time series) during the MOSAiC campaign. Water samples from the CTD/Rosette were taken and fixed in Hexamin- buffered Formalin. 50ml subsamples were counted using the Utermöhl method. Counts were carried out with a Zeiss inverted microscope. The data set comprises bulk parameters with cell abundances (as cells/l) for the most abundant protist groups. In addition cell numbers for the toxic pennate diatom are provided separately
    Keywords: Arctic; Arctic Ocean; Cells, other, indeterminata; Choanoflagellates; Ciliates, other; Cryptophyceae; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; Diatoms, centrales; Diatoms, pennales; Dinoflagellates, athecate; Dinoflagellates, other, indeterminata; Dinoflagellates, thecate; Event label; Flagellates, other; Identification; LATITUDE; Light microscopy (Utermöhl 1958); Location; LONGITUDE; MOSAiC; MOSAiC20192020; MOSAiC expedition; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Phaeocystis; Picoplankton; Polarstern; protists; PS122/3; PS122/3_30-53; PS122/3_31-59; PS122/3_32-75; PS122/3_34-77; PS122/3_36-81; PS122/3_37-46; PS122/3_38-54; PS122/3_40-36; Site; water column
    Type: Dataset
    Format: text/tab-separated-values, 120 data points
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  • 6
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    (Table 1) Correlation of polarity zones to polarity chrons at ODP Site 177-1093 from the Shona Ridge, South Atlantic (2002)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Keywords: 177-1093; Age model; Ageprofile Datum Description; Chronozone; Comment; COMPCORE; Composite Core; DEPTH, sediment/rock; Error, absolute; Joides Resolution; Leg177; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 15 data points
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  • 7
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    (Table 1) Correlation of polarity zones to polarity chrons at ODP Site 177-1094 from tthe southern South Atlantic (2002)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Keywords: 177-1094; Age model; Ageprofile Datum Description; Chronozone; Comment; COMPCORE; Composite Core; DEPTH, sediment/rock; Error, absolute; Joides Resolution; Leg177; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 19 data points
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  • 8
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    (Table 3) Depths and ages of biostratigraphic events and the Oi-1a isotope event in ODP Hole 177-1090 (2003)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Keywords: 177-1090; Age, maximum/old; Age, minimum/young; Age model; Ageprofile Datum Description; Chronozone; Comment; COMPCORE; Composite Core; Depth, composite bottom; Depth, composite top; DEPTH, sediment/rock; Joides Resolution; Leg177; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 74 data points
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  • 9
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    Meters composite depth (mcd) versus component declination, inclination and maximum angular deviation (MAD) values for natural remanent magnetization (NRM) from Integrated Ocean Drilling Program (IODP) Site U1306 (2021)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Description: The data comprise meters composite depth (mcd) versus component declination, inclination and maximum angular deviation (MAD) values for natural remanent magnetization (NRM) from Integrated Ocean Drilling Program (IODP) Site U1306 drilled on the crest of the Eirik Drift (SW Greenland) in 2272 m water depth. The component magnetizations were determined from stepwise alternating field demagnetization of NRM and measured on a pass-through u-channel magnetometer (see Channell et al., 2014). Planktic oxygen isotope (δ18O) and relative paleointensity (RPI) data are used in tandem to generate an age model for the last 1 Myr. For the 1-1.5 Ma interval, the age model is based on RPI alone due to insufficient foraminifera for isotope analyses. Utilizing RPI and δ18O in tandem allows recognition of low-δ18O "events" prior to glacial Terminations I, III, IV, V, VII, VIII, IX and X, that are independently supported by radiocarbon dates through the last deglaciation, and are attributed to local or regional surface-water effects. At Site U1306, Quaternary sedimentation rates (mean ~15 cm/kyr) are elevated during peak glacials and glacial onsets, and are reduced during interglacials, in contrast to the pattern at Site U1305 in 3460 m water depth at the distal toe of the drift, 191 km SW of Site U1306. The contrasting sedimentation-rate pattern appears to hold for the entire ~1.5 Myr record. The slackening and/or shoaling (due to lowered salinity) of the Deep Western Boundary Current (DWBC) during glacial intervals coincided with greater sediment supply to Site U1306 whereas the deepening, and possibly increased vigor, of the DWBC during interglacial intervals boosted sediment supply to Site U1305.
    Keywords: 303-U1306; COMPCORE; Composite Core; Declination; Deep Western Boundary Current; DEPTH, sediment/rock; Eirik Drift; Exp303; Inclination; Joides Resolution; Maximum angular deviation; North Atlantic; North Atlantic Climate 1; Northwest Atlantic; Oxygen isotopes; Quaternary; relative paleointensity; see Channell et al. (2014)
    Type: Dataset
    Format: text/tab-separated-values, 61119 data points
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  • 10
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    Meters composite depth (mcd) versus volume susceptibility and anhysteretic susceptibility from Integrated Ocean Drilling Program (IODP) Site U1306 (2021)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Description: The data comprise meters composite depth (mcd) versus volume susceptibility (x10-3 SI) and anhysteretic susceptibility from Integrated Ocean Drilling Program (IODP) Site U1306 drilled on the crest of the Eirik Drift (SW Greenland) in 2272 m water depth. The anhysteretic magnetization (ARM) was measured on a pass-through u-channel magnetometer and the volume susceptibilities were measured on a pass-through (u-channel) susceptibility bridge (see Channell et al., 2014). Planktic oxygen isotope (δ18O) and relative paleointensity (RPI) data are used in tandem to generate an age model for the last 1 Myr from Integrated Ocean Drilling Program (IODP) Site U1306 drilled on the crest of the Eirik Drift (SW Greenland) in 2272 m water depth. For the 1-1.5 Ma interval, the age model is based on RPI alone due to insufficient foraminifera for isotope analyses. Utilizing RPI and δ18O in tandem allows recognition of low-δ18O "events" prior to glacial Terminations I, III, IV, V, VII, VIII, IX and X, that are independently supported by radiocarbon dates through the last deglaciation, and are attributed to local or regional surface-water effects. At Site U1306, Quaternary sedimentation rates (mean ~15 cm/kyr) are elevated during peak glacials and glacial onsets, and are reduced during interglacials, in contrast to the pattern at Site U1305 in 3460 m water depth at the distal toe of the drift, 191 km SW of Site U1306. The contrasting sedimentation-rate pattern appears to hold for the entire ~1.5 Myr record. The slackening and/or shoaling (due to lowered salinity) of the Deep Western Boundary Current (DWBC) during glacial intervals coincided with greater sediment supply to Site U1306 whereas the deepening, and possibly increased vigor, of the DWBC during interglacial intervals boosted sediment supply to Site U1305.
    Keywords: 303-U1306; Anhysteretic susceptibility/magnetic susceptibility; COMPCORE; Composite Core; Deep Western Boundary Current; DEPTH, sediment/rock; Eirik Drift; Exp303; Joides Resolution; Magnetic susceptibility, volume; North Atlantic; North Atlantic Climate 1; Northwest Atlantic; Oxygen isotopes; Quaternary; relative paleointensity; see Channell et al. (2014)
    Type: Dataset
    Format: text/tab-separated-values, 40746 data points
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