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  • AGE; Calcium; Calcium/Titanium ratio; Calcium (centered log ratio); DEPTH, sediment/rock; ecosystem dynamics; Germany; Haemelsee; Haemelsee_Haem13; Iron; Iron/Titanium ratio; Iron (centered log ratio); Lake Haemelsee, Germany; log-Calcium/Titanium ratio; log-Iron/Titanium ratio; Niederreiter Piston corer; NPC; ORDINAL NUMBER; Potassium; Potassium (centered log ratio); Silicon; Silicon (centered log ratio); Titanium; Titanium (centered log ratio); X-ray fluorescence (XRF); XRF  (1)
  • Achnanthes sp.; AGE; alkanes; Amphora copulata; Amphora ovalis; Amphora pediculus; Amphora subconstricta; Asterionella formosa; Aulacoseira sp.; Biodiversity; Cavinula cocconeiformis; Chironomidae; Cocconeis neodiminuta; Cocconeis placentula; Cocconeis sp.; Counting valves; Cymbella parva; Cymbella sp.; Denticula kuetzingii; Denticula sp.; Denticula tenuis; DEPTH, sediment/rock; deuterium; Diatoma sp.; diatoms; Diatoms, centrales indeterminata; Diploneis sp.; Discotella stelligera; ecosystem dynamics; Encyonema minutum; Encyonema silesiacum; Epithemia adnata; Epithemia gibba; Epithemia sorex; Epithemia sp.; Epithemia turgida; Eunotia curvata; Eunotia flexuosa; Eunotia rhomboidea; Eunotia sp.; Fallacia pygmaea; Fragilaria recapitellata; Fragilaria sp.; Fragilariforma constricta; Fragilariforma lata; GDGTs; Germany; Gogorevia exilis; Gomphonema brebissonii; Gomphonema clevei; Gomphonema parvulum; Gomphonema sp.; Haemelsee; Haemelsee_Haem13; Halamphora thumensis; Khursevichia jentzschii; Lake Haemelsee, Germany; Lindavia bodanica; LOI; Meridion circulare; Navicula cincta; Navicula exilis; Navicula lanceolata; Navicula radiosa; Navicula sp.; Nepula vitiosa; Niederreiter Piston corer; Nitzschia dissipata; Nitzschia gracilis; Nitzschia lacuum; Nitzschia obtusa var. brevissima; Nitzschia sp.; NPC; Nupela tenuicephala; ORDINAL NUMBER; Pantocsekiella delicatula; Pantocsekiella ocellata; Pediastrum; Placoneis elginensis; Placoneis gastrum; Planothidium joursacense; Platessa conspicua; Pleurosigma sp.; Psammothidium helveticum; Pseudostaurosira brevistriata; Pseudostaurosira robusta; Pseudostaurosira spp.; Sellaphora pupula; Stauroforma exiguiformis; Stauroneis anceps; Stauroneis construens; Stauroneis sp.; Staurosira construens; Staurosirella pinnata; Staurosirella pinnata var. acuminata; Staurosirella pinnata var. intercedens; Staurosirella pinnata var. minutissima; Tabellaria fenestrata; Tabellaria flocculosa; Tabellaria quadriseptata; Tabellaria sp.; XRF  (1)
  • EPOS  (1)
Collection
Keywords
Publisher
Years
  • 1
    Publication Date: 2024-03-06
    Description: Abstract
    Description: Intercropping is the simultaneous growth of two or more crops in the same space for a significant part of their life cycle (Willey, 1979). In this context, samples from one farm experiments in the growing season 2015/2016 and 2016/2017, embedded in the cropping systems of one arable farm in the surrounding of Pisa, central-western part of Italy, were collected for analysis. The treatments were: PCW, a temporary intercropping system of wheat and persian clover, sown in paired rows; CONTROLSTRIP, unfertilized wheat as a sole crop, sown in paired rows.
    Description: Methods
    Description: The samples were collected from a farm located in Valtriano, around 20 km from Pisa (43°36’N 10°29’E). The temporary intercropping system comprises common wheat (Triticum aestivum L., cv. Bolero) and persian clover (Trifolium resupinatum L., cv. Laser). Sampling of above-ground plant biomass was done by hands in March 2016 and 2017. For each treatment, above-ground plant biomass was collected several plots which includes three subplots with dimension of 0.25m2 in 2016 and 0.075 m2 in 2017. The samples collected, only for the green part of the plant, were dried at 60°C for 48 h. Then, coarse grinding of the plant fibres (about 1 mm in diameter) was carried out, followed by further cryogenic grinding.
    Keywords: EPOS ; multi-scale laboratories ; geochemistry and microscopy ; geochemistry data ; EARTH SCIENCE 〉 BIOSPHERE 〉 VEGETATION 〉 NITROGEN
    Type: Dataset , Dataset
    Location Call Number Expected Availability
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  • 2
    Publication Date: 2024-06-12
    Description: This dataset provides geochemical composition data for the Lateglacial sediment sequence retrieved from Lake Hämelsee (Germany) in 2013, determined using an Itrax X-ray fluorescence (XRF) core scanner. Selected geochemical major and minor elements (Ti, Si, Ca, Fe) expressed as counts per second, as elemental ratios, as centered log-ratios (CLR) and as log-ratios are presented against both depth (m) and age (cal yr. BP). The XRF data was used to provide information on LGIT landscape dynamics at lake Hämelsee. The geochemical composition of the sediments was determined on fresh core splits using an Itrax X-ray fluorescence (XRF) core scanner equipped with a Cr tube. Measurements were performed at 200 µm resolution during 20s exposure time per step at 30 kV tube voltage and 40 mA tube current. The analyses were performed in the laboratories of GFZ, Potsdam.
    Keywords: AGE; Calcium; Calcium/Titanium ratio; Calcium (centered log ratio); DEPTH, sediment/rock; ecosystem dynamics; Germany; Haemelsee; Haemelsee_Haem13; Iron; Iron/Titanium ratio; Iron (centered log ratio); Lake Haemelsee, Germany; log-Calcium/Titanium ratio; log-Iron/Titanium ratio; Niederreiter Piston corer; NPC; ORDINAL NUMBER; Potassium; Potassium (centered log ratio); Silicon; Silicon (centered log ratio); Titanium; Titanium (centered log ratio); X-ray fluorescence (XRF); XRF
    Type: Dataset
    Format: text/tab-separated-values, 243908 data points
    Location Call Number Expected Availability
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  • 3
    Publication Date: 2024-06-12
    Description: This dataset provides counts of diatom valves for the Lateglacial sediment sequence retrieved from Lake Hämelsee (Germany) in 2013. Counts per taxon are presented against both depth (m) and age (cal yr. BP). The diatom data provides information on Lateglacial ecosystem dynamics and the dataset was used to interpret changes in aquatic diversity as well as in palaeolimnological conditions. A total of 78 samples were selected for diatom analysis using 2-5 cm sample intervals throughout the Lateglacial section of the core sequence, with a higher sampling resolution (1 cm intervals) around key transitions. Organic matter was removed from the samples (ca. 0.01 grams dried sediment) by oxidation using 5 ml of H2O2 (30%) and heating in a water bath at 70 °C for 24-28 hrs. Subsequently, a few drops of HCl (50%) were added to remove residual H2O2 and carbonates. Samples were washed by adding distilled water, shaking vigorously, centrifuging at 1200 rpm for 4 minutes, and removing the liquid using a pipette. This process was repeated 5 times, and a few drops of ammonia (NH3) were added to the solution prior to the final wash to prevent clumping of diatoms. Diatom slides were mounted using Naphrax and diatoms were identified using Krammer and Lange-Bertalot (1986–1991) and Camburn and Charles (2000). For several samples the target count sum of 300 diatom valves could not be reached due to low concentrations or poor diatom preservation. Prior to analysis and interpretation, and where possible, neighbouring samples with a low count sum were amalgamated until a count of at least 100 valves was reached; if this was not possible the samples were deleted from our dataset prior to subsequent analysis (note that these samples are still included in the dataset provided here). All analyses were performed in the laboratories of University College London, UK.
    Keywords: Achnanthes sp.; AGE; alkanes; Amphora copulata; Amphora ovalis; Amphora pediculus; Amphora subconstricta; Asterionella formosa; Aulacoseira sp.; Biodiversity; Cavinula cocconeiformis; Chironomidae; Cocconeis neodiminuta; Cocconeis placentula; Cocconeis sp.; Counting valves; Cymbella parva; Cymbella sp.; Denticula kuetzingii; Denticula sp.; Denticula tenuis; DEPTH, sediment/rock; deuterium; Diatoma sp.; diatoms; Diatoms, centrales indeterminata; Diploneis sp.; Discotella stelligera; ecosystem dynamics; Encyonema minutum; Encyonema silesiacum; Epithemia adnata; Epithemia gibba; Epithemia sorex; Epithemia sp.; Epithemia turgida; Eunotia curvata; Eunotia flexuosa; Eunotia rhomboidea; Eunotia sp.; Fallacia pygmaea; Fragilaria recapitellata; Fragilaria sp.; Fragilariforma constricta; Fragilariforma lata; GDGTs; Germany; Gogorevia exilis; Gomphonema brebissonii; Gomphonema clevei; Gomphonema parvulum; Gomphonema sp.; Haemelsee; Haemelsee_Haem13; Halamphora thumensis; Khursevichia jentzschii; Lake Haemelsee, Germany; Lindavia bodanica; LOI; Meridion circulare; Navicula cincta; Navicula exilis; Navicula lanceolata; Navicula radiosa; Navicula sp.; Nepula vitiosa; Niederreiter Piston corer; Nitzschia dissipata; Nitzschia gracilis; Nitzschia lacuum; Nitzschia obtusa var. brevissima; Nitzschia sp.; NPC; Nupela tenuicephala; ORDINAL NUMBER; Pantocsekiella delicatula; Pantocsekiella ocellata; Pediastrum; Placoneis elginensis; Placoneis gastrum; Planothidium joursacense; Platessa conspicua; Pleurosigma sp.; Psammothidium helveticum; Pseudostaurosira brevistriata; Pseudostaurosira robusta; Pseudostaurosira spp.; Sellaphora pupula; Stauroforma exiguiformis; Stauroneis anceps; Stauroneis construens; Stauroneis sp.; Staurosira construens; Staurosirella pinnata; Staurosirella pinnata var. acuminata; Staurosirella pinnata var. intercedens; Staurosirella pinnata var. minutissima; Tabellaria fenestrata; Tabellaria flocculosa; Tabellaria quadriseptata; Tabellaria sp.; XRF
    Type: Dataset
    Format: text/tab-separated-values, 6862 data points
    Location Call Number Expected Availability
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