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  • 1
    Electronic Resource
    Electronic Resource
    Effects of Ape1 Overexpression on Cellular Resistance to DNA-Damaging and Anticancer Agents (1999)
    Springer
    Somatic cell and molecular genetics 25 (1999), S. 253-262 
    Details
    ISSN: 1572-9931
    Keywords: Ape1 ; base excision repair ; cellular resistance ; L-OddC ; antimetabolite/nucleoside analog ; antiviral/anticancer agent
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In vitro biochemical studies indicate that Ape1 is the major mammalian enzyme responsible for repairing abasic lesions in DNA and a significant factor in the processing of specific 3′-replication-blocking termini. Toward addressing the role of Ape1 in cellular resistance to specific DNA-damaging and anticancer agents, we constructed a chinese hamster ovary (CHO) cell line, AA8-Ape1, that exhibits a 7-fold higher Ape1-dependent nuclease activity; this overexpression is abolished upon exposure to tetracycline (Tc). In comparison to the AA8 parental control, our data indicates that Ape1 activity is not rate-limiting for the repair of cytotoxic damages induced by the alkylating agent methyl methanesulfonate (MMS), the oxidizing agent hydrogen peroxide (H2O2), or ionizing radiation (IR). AA8-Ape1 cells did exhibit increased resistance to bleomycin following a chronic 3-day exposure, but not to more acute challenges of 1 h. Most notably, the AA8-Ape1 line displayed ∼1.7-fold elevated resistance to the replication-blocking nucleoside analog dioxolane cytidine (L-OddC); this improved resistance was abrogated by the addition of Tc to the medium. These studies demonstrate that Ape1 is not rate-limiting in the repair of MMS- or H2O2-induced DNA damage, that Ape1 may dictate the sensitivity of bleomycin, depending on dosing scheme, and for the first time, that Ape1 can influence cellular resistance to the anticancer/antiviral antimetabolite L-OddC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019979613989
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Biome‐ and timescale‐dependence of Holocene vegetation variability in the Northern Hemisphere (2023)
    Wiley
    In:  EPIC3Ecology and Evolution, Wiley, 13(10), pp. e10585-e10585, ISSN: 2045-7758
    Details
    Publication Date: 2024-03-19
    Description: Global climatic changes expected in the next centuries are likely to cause unparalleled vegetation disturbances, which in turn impact ecosystem services. To assess the significance of disturbances, it is necessary to characterize and understand typical natural vegetation variability on multi-decadal timescales and longer. We investigate this in the Holocene vegetation by examining a taxonomically harmonized and temporally standardized global fossil pollen dataset. Using principal component analysis, we characterize the variability in pollen assemblages, which are a proxy for vegetation composition, and derive timescale-dependent estimates of variability using the first-order Haar structure function. We find, on average, increasing fluctuations in vegetation composition from centennial to millennial timescales, as well as spatially coherent patterns of variability. We further relate these variations to pairwise comparisons between biome classes based on vegetation composition. As such, higher variability is identified for open-land vegetation compared to forests. This is consistent with the more active fire regimes of open-land biomes fostering variability. Needleleaf forests are more variable than broadleaf forests on shorter (centennial) timescales, but the inverse is true on longer (millennial) timescales. This inversion could also be explained by the fire characteristics of the biomes as fire disturbances would increase vegetation variability on shorter timescales, but stabilize vegetation composition on longer timecales by preventing the migration of less fire-adapted species.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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    PAPER (OA)
  • 3
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    Projective cover of ground vegetation types at 32 sites in Northwestern Canada, in Summer 2022 (CA-Land_2022_NWCanada) (2023)
    PANGAEA
    Details
    Publication Date: 2023-10-14
    Description: Vegetation surveys were carried out in Northwest Territories, Yukon and British Columbia in Canada. The study area is within the boreal forest biome and is partially underlain by permafrost soils. The aim was to record the projective ground vegetation in different boreal forest types studied during the CA-Land_2022_NWCanada field campaign in July and August 2022. Ground vegetation was surveyed for different vegetation types within a circular forest plot of 15m radius. Depending on the heterogeneity of the forest plot, multiple vegetation types (VA, VB, or VC) were chosen for survey. The assignment of a vegetation type is always unique to a site. Their cover on the circular forest plot was recorded in percent. In total, 46 vegetation types at 32 forest plots were assessed. All data were collected by scientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) Germany, and the University of Potsdam Germany.
    Keywords: AWI_Envi; AWI Arctic Land Expedition; boreal forest; British Columbia, Canada; CA-Land_2022_NWCanada; EN22002; EN22003; EN22004; EN22005; EN22006; EN22007; EN22008; EN22009; EN22010; EN22011; EN22012; EN22018; EN22019; EN22020; EN22021; EN22032; EN22033; EN22034; EN22037; EN22039; EN22046; EN22047; EN22049; EN22052; EN22055; EN22058; EN22060; EN22062; EN22063; EN22065; EN22069; EN22071; Event label; Field observation; Forest Change Northwest Canada; ground vegetation; Northwest Territories, Canada; Permafrost; Polar Terrestrial Environmental Systems @ AWI; Vegetation; Vegetation, cover; vegetation survey; Vegetation survey; Vegetation type; VEGSUR; Visual estimation in exact nadir according to Li et al. 2023; Yukon, Canada
    Type: Dataset
    Format: text/tab-separated-values, 92 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Aggregated ground vegetation above-ground biomass at 31 sites in Northwestern Canada, in Summer 2022 (CA-Land_2022_NWCanada) (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-01
    Description: Above-ground biomass for ground vegetation is given in g per m² for each taxon and different vegetation types at 31 sites. Vegetation surveys were carried out in Northwest Territories, Yukon and British Columbia in Canada. The study area is within the boreal forest biome and is partially underlain by permafrost soils. The aim was to record the ground vegetation above-ground biomass in different boreal forest types studied during the CA-Land_2022_NWCanada field campaign in July and August 2022. The ground vegetation above-ground biomass was measured for different vegetation types within a circular forest plot of 15m radius. Depending on the heterogeneity of the forest plot, multiple vegetation types (VA, VB, or VC) were chosen for the survey. One quadrat of 50x50 cm was harvested per vegetation type. All vegetation smaller than 40 cm was harvested. Biomass harvest was conducted just outside the circular forest plots, which will serve as long-term monitoring sites. Fresh weights were recorded in field and sub sampling conducted if necessary. Samples were later dried at 60°C until a constant weight was achieved and dry weight was recorded. Average ground vegetation biomass per plot was calculated by using a weighted average for each vegetation type. In total 31 forest plots were investigated. All data were collected by scientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) Germany, and the University of Potsdam Germany.
    Keywords: Achillea millefolium, biomass as dry weight; Alnus alnobetula, biomass, dry mass; Andromeda polifolia, biomass, dry mass; Apiaceae, biomass, dry mass; Arctostaphylos uva-ursi, biomass, dry mass; Arctous rubra, biomass, dry mass; AWI_Envi; AWI Arctic Land Expedition; Betula glandulosa, biomass, dry mass; Biomass, aboveground, dry mass; boreal forest; British Columbia, Canada; Burnt vegetation, biomass, dry mass; CA-Land_2022_NWCanada; Carex sp., biomass, dry mass; Chamaenerion angustifolium, biomass, dry mass; Cornus canadensis, biomass, dry mass; Cyperaceae, biomass, dry mass; DATE/TIME; Diphasiastrum complanatum, biomass, dry mass; ELEVATION; Empetrum nigrum, biomass, dry mass; EN22003; EN22004; EN22005; EN22006; EN22007; EN22008; EN22009; EN22010; EN22011; EN22012; EN22018; EN22019; EN22020; EN22021; EN22032; EN22033; EN22034; EN22037; EN22039; EN22046; EN22047; EN22049; EN22052; EN22055; EN22058; EN22060; EN22062; EN22063; EN22065; EN22069; EN22071; Equisetum arvense, biomass, dry mass; Equisetum sp., biomass, dry mass; Equisetum sylvaticum, biomass, dry mass; Eriophorum vaginatum, biomass, dry mass; Event label; Fabaceae, biomass, dry mass; Field observation; Forest Change Northwest Canada; Fragaria virginiana, biomass, dry mass; Geocaulon lividum, biomass, dry mass; ground vegetation; Indeterminata, biomass, dry mass; Juniperus communis, biomass, dry mass; Juniperus horizontalis, biomass, dry mass; LATITUDE; Ledum groenlandicum, biomass, dry mass; Ledum palustre, biomass, dry mass; Lichen, biomass, dry mass; Linnaea borealis, biomass, dry mass; Litter, aboveground, biomass, dry mass; Litter and deadwood, biomass, dry mass; LONGITUDE; Moss, biomass, dry mass; Moss and lichen, biomass, dry mass; Northwest Territories, Canada; Orthilia secunda, biomass, dry mass; Oxycoccus microcarpus, biomass, dry mass; Permafrost; Petasites frigidus, biomass, dry mass; Petasites sp., biomass, dry mass; Picea glauca, biomass, dry mass; Picea sp., biomass, dry mass; Platanthera aquilonis, biomass, dry mass; Platanthera obtusata, biomass, dry mass; Poaceae, biomass, dry mass; Poaceae+Cyperaceae, biomass, dry mass; Pocket scale, Conrad Electronic SE, Voltcraft PS-750; Polar Terrestrial Environmental Systems @ AWI; Pyrola chlorantha, biomass, dry mass; Pyrola minor, biomass, dry mass; Ranunculaceae, biomass, dry mass; Rhododendron lapponicum, biomass, dry mass; Rhododendron sp., biomass, dry mass; Rosa acicularis, biomass, dry mass; Rubus chamaemorus, biomass, dry mass; Salix reticulata, biomass, dry mass; Salix sp., biomass, dry mass; Saussurea angustifolia, biomass, dry mass; Saxifragaceae, biomass, dry mass; Shepherdia canadensis, biomass, dry mass; Spiraea stevenii, biomass, dry mass; Vaccinium uliginosum, biomass, dry mass; Vaccinium vitis-idaea, biomass, dry mass; Vegetation; vegetation survey; Vegetation survey; VEGSUR; Viburnum edule, biomass, dry mass; Yukon, Canada
    Type: Dataset
    Format: text/tab-separated-values, 1829 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Raw plot-wise ground vegetation above-ground biomass at 31 sites in Northwestern Canada, in Summer 2022 (CA-Land_2022_NWCanada) (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-01
    Description: Above-ground biomass for ground vegetation is given in g per m² for each taxon and different vegetation types at 31 sites. Vegetation surveys were carried out in Northwest Territories, Yukon and British Columbia in Canada. The study area is within the boreal forest biome and is partially underlain by permafrost soils. The aim was to record the ground vegetation above-ground biomass in different boreal forest types studied during the CA-Land_2022_NWCanada field campaign in July and August 2022. The ground vegetation above-ground biomass was measured for different vegetation types within a circular forest plot of 15m radius. Depending on the heterogeneity of the forest plot, multiple vegetation types (VA, VB, or VC) were chosen for the survey. One quadrat of 50x50 cm was harvested per vegetation type. All vegetation smaller than 40 cm was harvested. Biomass harvest was conducted just outside the circular forest plots, which will serve as long-term monitoring sites. Fresh weights were recorded in field and sub sampling conducted if necessary. Samples were later dried at 60°C until a constant weight was achieved and dry weight was recorded. In total 42 quadrats at 31 forest plots were investigated. All data were collected by scientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) Germany, and the University of Potsdam Germany.
    Keywords: Achillea millefolium, biomass as dry weight; Alnus alnobetula, biomass, dry mass; Andromeda polifolia, biomass, dry mass; Apiaceae, biomass, dry mass; Arctostaphylos uva-ursi, biomass, dry mass; Arctous rubra, biomass, dry mass; AWI_Envi; AWI Arctic Land Expedition; Betula glandulosa, biomass, dry mass; Biomass, aboveground, dry mass; boreal forest; British Columbia, Canada; Burnt vegetation, biomass, dry mass; CA-Land_2022_NWCanada; Carex sp., biomass, dry mass; Chamaenerion angustifolium, biomass, dry mass; Cornus canadensis, biomass, dry mass; Cyperaceae, biomass, dry mass; DATE/TIME; Diphasiastrum complanatum, biomass, dry mass; ELEVATION; Empetrum nigrum, biomass, dry mass; EN22003; EN22004; EN22005; EN22006; EN22007; EN22008; EN22009; EN22010; EN22011; EN22012; EN22018; EN22019; EN22020; EN22021; EN22032; EN22033; EN22034; EN22037; EN22039; EN22046; EN22047; EN22049; EN22052; EN22055; EN22058; EN22060; EN22062; EN22063; EN22065; EN22069; EN22071; Equisetum arvense, biomass, dry mass; Equisetum sp., biomass, dry mass; Equisetum sylvaticum, biomass, dry mass; Eriophorum vaginatum, biomass, dry mass; Event label; Fabaceae, biomass, dry mass; Field observation; Forest Change Northwest Canada; Fragaria virginiana, biomass, dry mass; Geocaulon lividum, biomass, dry mass; ground vegetation; Indeterminata, biomass, dry mass; Juniperus communis, biomass, dry mass; Juniperus horizontalis, biomass, dry mass; LATITUDE; Ledum groenlandicum, biomass, dry mass; Ledum palustre, biomass, dry mass; Lichen, biomass, dry mass; Linnaea borealis, biomass, dry mass; Litter, aboveground, biomass, dry mass; Litter and deadwood, biomass, dry mass; LONGITUDE; Moss, biomass, dry mass; Moss and lichen, biomass, dry mass; Northwest Territories, Canada; Orthilia secunda, biomass, dry mass; Other event; Oxycoccus microcarpus, biomass, dry mass; Permafrost; Petasites frigidus, biomass, dry mass; Petasites sp., biomass, dry mass; Picea glauca, biomass, dry mass; Picea sp., biomass, dry mass; Platanthera aquilonis, biomass, dry mass; Platanthera obtusata, biomass, dry mass; Poaceae, biomass, dry mass; Poaceae+Cyperaceae, biomass, dry mass; Pocket scale, Conrad Electronic SE, Voltcraft PS-750; Polar Terrestrial Environmental Systems @ AWI; Pyrola chlorantha, biomass, dry mass; Pyrola minor, biomass, dry mass; Ranunculaceae, biomass, dry mass; Rhododendron lapponicum, biomass, dry mass; Rhododendron sp., biomass, dry mass; Rosa acicularis, biomass, dry mass; Rubus chamaemorus, biomass, dry mass; Salix reticulata, biomass, dry mass; Salix sp., biomass, dry mass; Saussurea angustifolia, biomass, dry mass; Saxifragaceae, biomass, dry mass; Shepherdia canadensis, biomass, dry mass; Spiraea stevenii, biomass, dry mass; Vaccinium uliginosum, biomass, dry mass; Vaccinium vitis-idaea, biomass, dry mass; Vegetation; vegetation survey; Vegetation survey; VEGSUR; Viburnum edule, biomass, dry mass; Yukon, Canada
    Type: Dataset
    Format: text/tab-separated-values, 2520 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Aggregated moss layer projective vegetation cover at 32 sites in Northwestern Canada, in Summer 2022 (CA-Land_2022_NWCanada) (2023)
    PANGAEA
    Details
    Publication Date: 2023-10-14
    Description: Vegetation surveys were carried out in Northwest Territories, Yukon and British Columbia in Canada. The study area is within the boreal forest biome and is partially underlain by permafrost soils. The aim was to record the projective ground vegetation in different boreal forest types studied during the CA-Land_2022_NWCanada field campaign in July and August 2022. The ground vegetation projective cover in percent was assessed within a circular forest plot of 15m radius. Depending on the heterogeneity of the forest plot, multiple vegetation types (VA, VB, or VC) were surveyed separately. The assignment of a vegetation type is always unique to a site. Up to four quadrats of 2x2 m were surveyed per vegetation type and projective cover in percent recorded separately for herbaceous and moss layers. Additionally, ground vegetation projective cover was surveyed in 4 rings of 50 cm width around the center of the circular forest plot. Average projective cover per plot was calculated by using an average weighted by vegetation types for each site. The ring survey data was not included in the plot average. In total 32 forest plots were investigated. All data were collected by scientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) Germany, and the University of Potsdam Germany.
    Keywords: AWI_Envi; AWI Arctic Land Expedition; boreal forest; British Columbia, Canada; Burnt vegetation, cover; CA-Land_2022_NWCanada; DATE/TIME; Deadwood, cover; ELEVATION; EN22002; EN22003; EN22004; EN22005; EN22006; EN22007; EN22008; EN22009; EN22010; EN22011; EN22012; EN22018; EN22019; EN22020; EN22021; EN22032; EN22033; EN22034; EN22037; EN22039; EN22046; EN22047; EN22049; EN22052; EN22055; EN22058; EN22060; EN22062; EN22063; EN22065; EN22069; EN22071; Event label; Field observation; Forest Change Northwest Canada; ground vegetation; LATITUDE; Lichen, cover; Litter, cover; Litter and deadwood, cover; LONGITUDE; Moss, cover; Northwest Territories, Canada; Permafrost; Polar Terrestrial Environmental Systems @ AWI; Stones, cover; Vegetation; vegetation survey; Vegetation survey; VEGSUR; Visual estimation in exact nadir according to Li et al. 2023; Yukon, Canada
    Type: Dataset
    Format: text/tab-separated-values, 224 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Raw moss layer projective cover at 32 sites in Northwester Canada, in Summer 2022 (CA-Land_2022_NWCanada) (2023)
    PANGAEA
    Details
    Publication Date: 2023-10-14
    Description: Vegetation surveys were carried out in Northwest Territories, Yukon and British Columbia in Canada. The study area is within the boreal forest biome and is partially underlain by permafrost soils. The aim was to record the projective ground vegetation in different boreal forest types studied during the CA-Land_2022_NWCanada field campaign in July and August 2022. The ground vegetation projective cover in percent was assessed within a circular forest plot of 15m radius. Depending on the heterogeneity of the forest plot, multiple vegetation types (VA, VB, or VC) were surveyed separately. The assignment of a vegetation type is always unique to a site. Up to four quadrats of 2x2 m were surveyed per vegetation type and projective cover in percent recorded separately for herbaceous and moss layers. Additionally, ground vegetation projective cover was surveyed in 4 rings of 50 cm width around the center of the circular forest plot. Photos of quadrats were taken at the time of survey. In total 201 quadrats and rings at 32 forest plots were investigated. All data were collected by scientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) Germany, and the University of Potsdam Germany.
    Keywords: AWI_Envi; AWI Arctic Land Expedition; boreal forest; British Columbia, Canada; Burnt vegetation, cover; CA-Land_2022_NWCanada; DATE/TIME; Deadwood, cover; ELEVATION; EN22002; EN22003; EN22004; EN22005; EN22006; EN22007; EN22008; EN22009; EN22010; EN22011; EN22012; EN22018; EN22019; EN22020; EN22021; EN22032; EN22033; EN22034; EN22037; EN22039; EN22046; EN22047; EN22049; EN22052; EN22055; EN22058; EN22060; EN22062; EN22063; EN22065; EN22069; EN22071; Event label; Field observation; Forest Change Northwest Canada; ground vegetation; LATITUDE; Lichen, cover; Litter, cover; Litter and deadwood, cover; LONGITUDE; Moss, cover; Northwest Territories, Canada; Other event; Permafrost; Polar Terrestrial Environmental Systems @ AWI; Stones, cover; Vegetation; vegetation survey; Vegetation survey; VEGSUR; Visual estimation in exact nadir according to Li et al. 2023; Yukon, Canada
    Type: Dataset
    Format: text/tab-separated-values, 1608 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Aggregated herbaceous layer projective vegetation cover at 32 sites in Northwestern Canada, in Summer 2022 (CA-Land_2022_NWCanada) (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Description: Vegetation surveys were carried out in Northwest Territories, Yukon and British Columbia in Canada. The study area is within the boreal forest biome and is partially underlain by permafrost soils. The aim was to record the projective ground vegetation in different boreal forest types studied during the CA-Land_2022_NWCanada field campaign in July and August 2022. The ground vegetation projective cover in percent was assessed within a circular forest plot of 15m radius. Depending on the heterogeneity of the forest plot, multiple vegetation types (VA, VB, or VC) were surveyed separately. The assignment of a vegetation type is always unique to a site. Up to four quadrats of 2x2 m were surveyed per vegetation type and projective cover in percent recorded separately for herbaceous and moss layers. All vegetation smaller than 40cm was recorded. Additionally, ground vegetation projective cover was surveyed in 4 rings of 50 cm width around the center of the circular forest plot. Average projective cover per plot was calculated by using an average weighted by vegetation types for each site. The ring survey data was not included in the plot average. In total 32 forest plots were investigated. All data were collected by scientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) Germany, and the University of Potsdam Germany.
    Keywords: Abies lasiocarpa, cover; Achillea millefolium, cover; Alnus alnobetula, cover; Alnus sp., cover; Anemone parviflora, cover; Apiaceae, cover; Arctagrostis latifolia, cover; Arctostaphylos uva-ursi, cover; Arctous rubra, cover; AWI_Envi; AWI Arctic Land Expedition; Betula glandulosa, cover; Betula occidentalis, cover; Bistorta plumosa, cover; Bistorta vivipara, cover; boreal forest; British Columbia, Canada; CA-Land_2022_NWCanada; Carex scirpoidea, cover; Carex sp., cover; Chamaenerion angustifolium, cover; Cornus canadensis, cover; Cyperaceae, cover; Dasiphora fruticosa, cover; DATE/TIME; Deadwood, cover; Diphasiastrum complanatum, cover; Drosera rotundifolia, cover; Dryas integrifolia, cover; ELEVATION; Empetrum nigrum, cover; EN22002; EN22003; EN22004; EN22005; EN22006; EN22007; EN22008; EN22009; EN22010; EN22011; EN22012; EN22018; EN22019; EN22020; EN22021; EN22032; EN22033; EN22034; EN22037; EN22039; EN22046; EN22047; EN22049; EN22052; EN22055; EN22058; EN22060; EN22062; EN22063; EN22065; EN22069; EN22071; Equisetum arvense, cover; Equisetum sp., cover; Equisetum sylvaticum, cover; Eriophorum sp., cover; Eriophorum vaginatum, cover; Event label; Fabaceae, cover; Festuca altaica, cover; Field observation; Forest Change Northwest Canada; Fragaria virginiana, cover; Galium sp., cover; Geocaulon lividum, cover; Geraniaceae, cover; ground vegetation; Hedysarum alpinum, cover; Indeterminata, cover; Juniperus communis, cover; Juniperus horizontalis, cover; Kalmia procumbens, cover; LATITUDE; Ledum groenlandicum, cover; Ledum palustre, cover; Ledum sp., cover; Linnaea borealis, cover; LONGITUDE; Lupinus arcticus, cover; Mertensia paniculata, cover; Northwest Territories, Canada; Orthilia secunda, cover; Pedicularis labradorica, cover; Pedicularis sp., cover; Permafrost; Petasites frigidus, cover; Petasites sp., cover; Picea glauca, cover; Picea mariana, cover; Platanthera aquilonis, cover; Platanthera obtusata, cover; Poaceae, cover; Polar Terrestrial Environmental Systems @ AWI; Pyrola asarifolia, cover; Pyrola chlorantha, cover; Pyrola grandiflora, cover; Pyrola minor, cover; Pyrola sp., cover; Ranunculaceae, cover; Rhododendron lapponicum, cover; Rhododendron sp., cover; Ribes sp., cover; Rosa acicularis, cover; Rubus chamaemorus, cover; Rumex arcticus, cover; Salix pulchra, cover; Salix reticulata, cover; Salix sp., cover; Saussurea angustifolia, cover; Saxifragaceae, cover; Senecio lugens, cover; Shepherdia canadensis, cover; Sorbus aucuparia, cover; Spinulum annotinum, cover; Spiraea stevenii, cover; Tofieldia pusilla, cover; Vaccinium microcarpum, cover; Vaccinium uliginosum, cover; Vaccinium vitis-idaea, cover; Vegetation; vegetation survey; Vegetation survey; VEGSUR; Viburnum edule, cover; Visual estimation in exact nadir according to Li et al. 2023; Yukon, Canada
    Type: Dataset
    Format: text/tab-separated-values, 2656 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Raw herbaceous layer projective vegetation cover at 32 sites in Northwestern Canada, in Summer 2022 (CA-Land_2022_NWCanada) (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Description: Vegetation surveys were carried out in Northwest Territories, Yukon and British Columbia in Canada. The study area is within the boreal forest biome and is partially underlain by permafrost soils. The aim was to record the projective ground vegetation in different boreal forest types studied during the CA-Land_2022_NWCanada field campaign in July and August 2022. The ground vegetation projective cover in percent was assessed within a circular forest plot of 15m radius. Depending on the heterogeneity of the forest plot, multiple vegetation types (VA, VB, or VC) were surveyed separately. The assignment of a vegetation type is always unique to a site. Up to four quadrats of 2x2 m were surveyed per vegetation type and projective cover in percent recorded separately for herbaceous and moss layers. All vegetation smaller than 40cm was recorded. Additionally, ground vegetation projective cover was surveyed in 4 rings of 50 cm width around the center of the circular forest plot. In total 202 quadrats and rings at 32 forest plots were investigated. All data were collected by scientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) Germany, and the University of Potsdam Germany.
    Keywords: Abies lasiocarpa, cover; Achillea millefolium, cover; Alnus alnobetula, cover; Alnus sp., cover; Apiaceae, cover; Arctagrostis latifolia, cover; Arctostaphylos uva-ursi, cover; Arctous rubra, cover; AWI_Envi; AWI Arctic Land Expedition; Betula glandulosa, cover; Betula occidentalis, cover; Bistorta plumosa, cover; Bistorta vivipara, cover; boreal forest; British Columbia, Canada; CA-Land_2022_NWCanada; Carex scirpoidea, cover; Carex sp., cover; Chamaenerion angustifolium, cover; Cornus canadensis, cover; Cyperaceae, cover; Dasiphora fruticosa, cover; DATE/TIME; Deadwood, cover; Diphasiastrum complanatum, cover; Drosera rotundifolia, cover; Dryas integrifolia, cover; ELEVATION; Empetrum nigrum, cover; EN22002; EN22003; EN22004; EN22005; EN22006; EN22007; EN22008; EN22009; EN22010; EN22011; EN22012; EN22018; EN22019; EN22020; EN22021; EN22032; EN22033; EN22034; EN22037; EN22039; EN22046; EN22047; EN22049; EN22052; EN22055; EN22058; EN22060; EN22062; EN22063; EN22065; EN22069; EN22071; Equisetum arvense, cover; Equisetum sp., cover; Equisetum sylvaticum, cover; Eriophorum sp., cover; Eriophorum vaginatum, cover; Event label; Festuca altaica, cover; Field observation; Forest Change Northwest Canada; Fragaria virginiana, cover; Galium sp., cover; Geocaulon lividum, cover; Geraniaceae, cover; ground vegetation; Hedysarum alpinum, cover; Indeterminata, cover; Juniperus communis, cover; Juniperus horizontalis, cover; Kalmia procumbens, cover; LATITUDE; Ledum groenlandicum, cover; Ledum palustre, cover; Ledum sp., cover; Linnaea borealis, cover; LONGITUDE; Lupinus arcticus, cover; Mertensia paniculata, cover; Northwest Territories, Canada; Orthilia secunda, cover; Other event; Pedicularis labradorica, cover; Permafrost; Petasites frigidus, cover; Petasites sp., cover; Picea glauca, cover; Picea mariana, cover; Platanthera aquilonis, cover; Poaceae, cover; Polar Terrestrial Environmental Systems @ AWI; Pyrola asarifolia, cover; Pyrola chlorantha, cover; Pyrola grandiflora, cover; Pyrola minor, cover; Pyrola sp., cover; Ranunculaceae, cover; Rhododendron lapponicum, cover; Rhododendron sp., cover; Ribes sp., cover; Rosa acicularis, cover; Rubus chamaemorus, cover; Rumex arcticus, cover; Salix pulchra, cover; Salix reticulata, cover; Salix sp., cover; Saussurea angustifolia, cover; Saxifragaceae, cover; Senecio lugens, cover; Shepherdia canadensis, cover; Sorbus aucuparia, cover; Spinulum annotinum, cover; Spiraea stevenii, cover; Tofieldia pusilla, cover; Vaccinium microcarpum, cover; Vaccinium uliginosum, cover; Vaccinium vitis-idaea, cover; Vegetation; vegetation survey; Vegetation survey; VEGSUR; Viburnum edule, cover; Visual estimation in exact nadir according to Li et al. 2023; Yukon, Canada
    Type: Dataset
    Format: text/tab-separated-values, 16160 data points
    Location Call Number Limitation Availability
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  • 10
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    Unknown
    Ground vegetation cover at 47 lake sites in Central and Eastern Yakutia, Siberia, in summer 2021 (RU-Land_2021_Yakutia) (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: The vegetation surveys were carried out in four different study areas in the Sakha Republic, Russia: in the mountainous region of the Verkhoyansk Range within the Oymyakonsky and Tomponsky District (Event EN21402 - EN21415), and in three lowland regions of Central Yakutia within the Churapchinsky, Tattinsky and the Megino-Kangalassky District (Event EN21416 - EN21464). The study area is located within the boreal forest biome that is underlain by permafrost soils. The aim was to record the projective ground vegetation in the shore area of the lakes studied during the RU-Land_2021_Yakutia summer field campaign in August and September 2021. Baisheva et al. (2022) gives an overview of the lakes studied and the corresponding hydrochemistry. The ground vegetation was estimated as a percentage within 2 x 2 m plots. The location of the plots was selected on site at the lake to represent the typical ground cover. Some of the vegetation plots were located directly on the shore in the transition to the water, others were chosen nearby the lakeshore. The elevation corresponds to the lake level, as the plots were in the immediate vicinity. The number of plots per lake depended on the different land cover classes, with more plots selected if the vegetation cover was more heterogeneous. The vegetation cover was estimated for each taxon within the plot. If only a few specimens of a species were represented within the plot (less than 1%), they are marked with '〈 1'. If many specimens of a species were represented in a plot (up to 5%), they are designated as '〈 5'. Mainly the ground vegetation was recorded. In case of clear height difference of the plants in a plot, the cover was divided into shrubs (approx. 〉 1.70 m) and trees (〉 3-5 m). In total, 92 plots at 47 lakes were investigated. All data were collected by scientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) Germany, the University of Potsdam Germany, and the North-Eastern Federal University of Yakutsk (NEFU) Russia.
    Keywords: Aconogonon ochreatum, cover; Aconogonon sp., cover; Acorus calamus, cover; Agrostis sp., cover; Agrostis stolonifera, cover; Alisma plantago-aquatica, cover; Alisma sp., cover; Alopecurus arundinaceus, cover; Andromeda polifolia, cover; Anemone sylvestris, cover; Apiaceae, cover; Arctophila fulva, cover; Arctous alpina, cover; Area/locality; Armoracia sisymbrioides, cover; Artemisia cf. mongolica, cover; Artemisia commutata, cover; Artemisia dracunculus, cover; Artemisia laciniata, cover; Artemisia macrantha, cover; Artemisia sp., cover; Artemisia tanacetifolia, cover; Artemisia vulgaris, cover; Asteraceae, cover; Astragalus inopinatus, cover; AWI_Envi; AWI Arctic Land Expedition; Bare ground, cover; Beckmannia eruciformis, cover; Beckmannia syzigachne, cover; Betula divaricata, cover; Betula fruticosa, cover; Betula nana, cover; Betula pubescens, cover; Betula sp., cover; Bidens sp., cover; Biome; Blitum asiaticum, cover; Bolboschoenus planiculmis, cover; boreal forest; Bromopsis karavajevii, cover; Calamagrostis neglecta, cover; Calamagrostis sp., cover; Carex aquatilis, cover; Carex atherodes, cover; Carex bigelowii, cover; Carex bigelowii ssp. ensifolia, cover; Carex chordorrhiza, cover; Carex disticha, cover; Carex limosa, cover; Carex reptabunda, cover; Carex rostrata, cover; Carex rotundata, cover; Carex sp., cover; Central Yakutia; Chamaedaphne calyculata, cover; Chamaenerion angustifolium, cover; Chamaenerion latifolium, cover; Chenopodium album, cover; Chenopodium ficifolium, cover; Chenopodium sp., cover; Churapchinsky District; Cirsium setosum, cover; Cnidium monnieri, cover; Comarum palustre, cover; Comment; Cyperaceae indeterminata, cover; Dasystephana decumbens, cover; DATE/TIME; Deadwood, cover; Description; Dianthus versicolor, cover; Dryas grandis, cover; Eleocharis sareptana, cover; ELEVATION; Elymus kronokensis, cover; Elymus sp., cover; Elytrigia repens, cover; Empetrum nigrum, cover; EN21402-V01; EN21402-V02; EN21404-V01; EN21404-V02; EN21405-V01A; EN21405-V01B; EN21405-V02; EN21405-V03; EN21406-V01; EN21406-V02; EN21407-V01; EN21407-V02; EN21408-409-V01A; EN21408-409-V01B; EN21408-409-V01C; EN21408-V01; EN21408-V02; EN21408-V03; EN21409-V01; EN21410-VA1; EN21410-VA2; EN21410-VA3; EN21411-V01; EN21411-V02; EN21411-V03; EN21412-V01; EN21412-VA1; EN21412-VB1; EN21414-V01; EN21414-V02; EN21415-V01; EN21415-V02; EN21416-V01; EN21416-V02; EN21416-V03; EN21417-VA1; EN21417-VA2; EN21418-V01; EN21418-V02; EN21418-V03; EN21419-V01; EN21420-V01; EN21425-V01; EN21425-V02; EN21426-V01; EN21426-V02; EN21426-V03; EN21427-V01; EN21427-V02; EN21428-V01; EN21428-V02; EN21429-V01; EN21430-V01; EN21430-V02; EN21431-V01; EN21431-V02; EN21432-V01; EN21432-V02; EN21433-V01; EN21433-V02; EN21433-V03; EN21433-V04; EN21436-V01; EN21437-V01; EN21438-V01; EN21438-V02; EN21439-V01; EN21440-V01; EN21442-V01; EN21442-V02; EN21443-V01; EN21444-V01; EN21444-V02; EN21445-V01; EN21448-V01; EN21448-V02; EN21449-V01; EN21453-V01; EN21453-V02; EN21454-V01; EN21454-V02; EN21455-V01; EN21457-V01; EN21458-V01; EN21458-V02; EN21459-V01; EN21459-V02; EN21462-V01; EN21462-V02; EN21463-V01; EN21464-V01; EN21464-V02; Epilobium davuricum, cover; Epilobium palustre, cover; Equisetum arvense, cover; Equisetum fluviatile, cover; Equisetum scirpoides, cover; Equisetum sp., cover; Ericaceae indeterminata, cover; Erigeron acris, cover; Eriophorum angustifolium, cover; Eriophorum russeolum, cover; Eriophorum sp., cover; Euphrasia jacutica, cover; Event label; Fabaceae indeterminata, cover; Field observation; Fragaria sp., cover; Galatella dahurica, cover; Galium trifidum, cover; Galium uliginosum, cover; Galium verum, cover; Gentianopsis barbata, cover; Geranium pratense, cover; Glaux maritima, cover; Halerpestes sarmentosa, cover; Hedysarum sp., cover; Hieracium umbellatum, cover; Hordeum brevisubulatum, cover; Inula britannica, cover; Jacobaea erucifolia, cover; Knorringia sibirica, cover; Kobresia sp., cover; lake; Larix cajanderi, cover; Larix sp., cover; Lathyrus humilis, cover; LATITUDE; Ledum palustre, cover; Lemna sp., cover; Lichen, cover; Linaria acutiloba, cover; Litter, cover; LONGITUDE; Megino-Kangalassky District; Menyanthes trifoliata, cover; Moss, cover; Myriophyllum sp., cover; Orthilia obtusata, cover; Other event; Oxycoccus microcarpus, cover; Oxytropis deflexa, cover; Oymyakonsky District; Parnassia palustris, cover; Pentaphylloides fruticosa, cover; Persicaria amphibia, cover; Persicaria sp., cover; Phragmites australis, cover; Phragmites sp., cover; Plantago major, cover; Plot size, description; Poa botryoides, cover; Poaceae, cover; Poaceae indeterminata, cover; Poa pratensis, cover; Polar Terrestrial Environmental Systems @ AWI; Polygonum novoascanicum, cover; Polygonum sp., cover; Potamogeton alpinus, cover; Potentilla anserina, cover; Potentilla bifurca, cover; Potentilla pensylvanica, cover; Potentilla sp., cover; Potentilla supina ssp. paradoxa, cover; Primula serrata, cover; Primula sp., cover; Puccinellia hauptiana, cover; Ranunculaceae indeterminata, cover; Rhododendron parvifolium, cover; Ribes sp., cover; Rosa acicularis, cover; Rubiaceae indeterminata, cover; Rubus chamaemorus, cover; RU-Land_2021_Yakutia; Rumex maritimus, cover; Rumex sp., cover; Russia; Sakha Republic; Salix bebbiana, cover; Salix dshugdshurica, cover; Salix glauca, cover; Salix hastata, cover; Salix myrtilloides, cover; Salix pyrolifolia, cover; Salix schwerinii, cover; Salix sp., cover; Salix taraikensis, cover; Salix udensis, cover; Sanguisorba officinalis, cover; Saussurea amara, cover; Saxifraga ledebouriana, cover; Saxifraga sp., cover; Scolochloa festucacea, cover; Siberia; Sium suave, cover; Smilacina trifolia, cover; Stellaria cf. crassifolia, cover; Stellaria crassifolia, cover; Stellaria palustris, cover; Stones, cover; Taraxacum cf. polozhiae, cover; Taraxacum polozhiae, cover; Taraxacum sp., cover; Tephroseris subdentata, cover; Thalictrinae indeterminata, cover; Thalictrum simplex, cover; thermokarst lakes; Tomponsky District; Trifolium repens, cover; Trifolium sp., cover; Triglochin palustris, cover; Vaccinium myrtillus, cover; Vaccinium uliginosum, cover; Vaccinium vitis-idaea, cover; Valeriana capitata, cover; vegetation; vegetation survey; Vegetation survey; VEGSUR; Veronica incana, cover; Vicia amoena, cover; Vicia cracca, cover; Viola sp., cover; Water, cover; Yakutia
    Type: Dataset
    Format: text/tab-separated-values, 1001 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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