Ronny Friedrich | Curt-Engelhorn-Centre Archaeometry gGmbH Mannheim (original) (raw)
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Papers by Ronny Friedrich
Journal of Cave and Karst Studies, 2018
Absolute dates of cave bears from Northern Italy are rare. The first radiocarbon date from Covoli... more Absolute dates of cave bears from Northern Italy are rare. The first radiocarbon date from Covoli di Velo Cave (Verona Province, Veneto, N. Italy) from a cave bear first phalanx is reported; its value is 29,130 ± 0.90 14 C yr BP. The date, combined with morphological features of dentition suggest that cave bear populations that lived in Northern Italy were relatively underived compared to other European populations, hinting at patters of migration. Comparison of dental morphology suggest that the Covoli di Velo bear is Ursus spelaeus.
Journal of Cave and Karst Studies, 2018
Absolute dates of cave bears from Northern Italy are rare. The first radiocarbon date from Covoli... more Absolute dates of cave bears from Northern Italy are rare. The first radiocarbon date from Covoli di Velo Cave (Verona Province, Veneto, N. Italy) from a cave bear first phalanx is reported; its value is 29,130 ± 0.90 14 C yr BP. The date, combined with morphological features of dentition suggest that cave bear populations that lived in Northern Italy were relatively underived compared to other European populations, hinting at patters of migration. Comparison of dental morphology suggest that the Covoli di Velo bear is Ursus spelaeus.
Additional file 2: Figure S1. Identification of scaffolds linked to chromosome X using sequencing... more Additional file 2: Figure S1. Identification of scaffolds linked to chromosome X using sequencing coverage and scaffold length. Green dots correspond to scaffolds assigned as linked to chromosome X. The red lines indicate the median coverage for all scaffolds. The blue lines represent half the median coverage which corresponds to the coverage of scaffolds linked to chromosome X. Figure S2. Past demography for moose (Alces alces) using PSMC. Thin lines represent 100 bootstrap runs. The x-axis corresponds to time before present in years on a log scale, assuming an estimated substitution rate of 0.7 × 10− 8 substitutions/site/generation [30] and a generation time of 7 years [31]. The y-axis corresponds to the effective population size Ne. Figure S3. Past demography for moose (Alces alces) using a Bayesian Skyline Plot (BSP). Demographic reconstruction was inferred in BEAST using 14 European 16,693 bp mitogenomes. Timing of events was estimated assuming a mean rate of 9 × 10− 9 substitu...
Additional file 2: Figure S1. Identification of scaffolds linked to chromosome X using sequencing... more Additional file 2: Figure S1. Identification of scaffolds linked to chromosome X using sequencing coverage and scaffold length. Green dots correspond to scaffolds assigned as linked to chromosome X. The red lines indicate the median coverage for all scaffolds. The blue lines represent half the median coverage which corresponds to the coverage of scaffolds linked to chromosome X. Figure S2. Past demography for moose (Alces alces) using PSMC. Thin lines represent 100 bootstrap runs. The x-axis corresponds to time before present in years on a log scale, assuming an estimated substitution rate of 0.7 × 10− 8 substitutions/site/generation [30] and a generation time of 7 years [31]. The y-axis corresponds to the effective population size Ne. Figure S3. Past demography for moose (Alces alces) using a Bayesian Skyline Plot (BSP). Demographic reconstruction was inferred in BEAST using 14 European 16,693 bp mitogenomes. Timing of events was estimated assuming a mean rate of 9 × 10− 9 substitu...
Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh-O18_06_2014&quo... more Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh-O18_06_2014" project. 12 samples collected in 2014 in Bangladesh.
Delta-18O and Delta-D ratio measurements of groundwater from the "SI Dripwater" project... more Delta-18O and Delta-D ratio measurements of groundwater from the "SI Dripwater" project. 124 samples collected from dripwater in Vietnam in 2013.
Delta-18O and Delta-D ratio measurements of water from the "S4P" project. 821 samples c... more Delta-18O and Delta-D ratio measurements of water from the "S4P" project. 821 samples collected from Feb, 2011 to April 2012.
Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh-O18_06_2014&quo... more Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh-O18_06_2014" project. 12 samples collected in 2014 in Bangladesh.
Delta-18O and Delta-D ratio measurements of water from the "AU1121" project. 455 sample... more Delta-18O and Delta-D ratio measurements of water from the "AU1121" project. 455 samples collected in 2010/2011 on the research vessel Aurora Australis along parts of the Antarctic continental margin.
Delta-18O and Delta-D ratio measurements of groundwater from the "SI Dripwater" project... more Delta-18O and Delta-D ratio measurements of groundwater from the "SI Dripwater" project. 124 samples collected from dripwater in Vietnam in 2013.
Delta-18O and Delta-D ratio measurements of water from the "Switchyard-12" project. 160... more Delta-18O and Delta-D ratio measurements of water from the "Switchyard-12" project. 160 samples collected in April to May, 2012 in the Arctic Ocean.
Delta-18O and Delta-D ratio measurements of water from the "S4P" project. 821 samples c... more Delta-18O and Delta-D ratio measurements of water from the "S4P" project. 821 samples collected from Feb, 2011 to April 2012.
Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh O18_09_2012&quo... more Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh O18_09_2012" project. 11 samples collected in May/2012 in Iceland.
Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh O18" proje... more Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh O18" project. 278 samples collected from 2009 to 2011 in Bangladesh.
Delta-18O and Delta-D ratio measurements of water from the "AU1121" project. 455 sample... more Delta-18O and Delta-D ratio measurements of water from the "AU1121" project. 455 samples collected in 2010/2011 on the research vessel Aurora Australis along parts of the Antarctic continental margin.
Delta-18O and Delta-D ratio measurements of water from the "Switchyard-12" project. 160... more Delta-18O and Delta-D ratio measurements of water from the "Switchyard-12" project. 160 samples collected in April to May, 2012 in the Arctic Ocean.
In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island i... more In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island in the western Arabian Sea were investigated through a new set of high-precision U-series and radiocarbon (14C) dates. The data reveal an extreme case of very high and also climate dependent DCF values. For M1-5 an average DCF of 56.2 ± 3.4 % is observed between 27 and 18 kyr BP. Such high DCF values indicate a high influence of aged soil organic matter (SOM) and nearly completely closed system carbonate dissolution conditions. Towards the end of the last glacial period decreasing Mg/Ca ratios suggest an increase in precipitation which caused a marked change in the soil carbon cycling as indicated by sharply decreasing DCF. This is in contrast to the relation of soil infiltration and reservoir age observed in stalagmites from temperate zones. For Socotra Island, which is influenced by the East African-Indian monsoon, we propose that more humid conditions and enhanced net-infiltration afte...
In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island i... more In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island in the western Arabian Sea were investigated through a new set of high-precision U-series and radiocarbon (14C) dates. The data reveal an extreme case of very high and also climate dependent DCF values. For M1-5 an average DCF of 56.2 ± 3.4 % is observed between 27 and 18 kyr BP. Such high DCF values indicate a high influence of aged soil organic matter (SOM) and nearly completely closed system carbonate dissolution conditions. Towards the end of the last glacial period decreasing Mg/Ca ratios suggest an increase in precipitation which caused a marked change in the soil carbon cycling as indicated by sharply decreasing DCF. This is in contrast to the relation of soil infiltration and reservoir age observed in stalagmites from temperate zones. For Socotra Island, which is influenced by the East African-Indian monsoon, we propose that more humid conditions and enhanced net-infiltration afte...
Journal of Cave and Karst Studies, 2018
Absolute dates of cave bears from Northern Italy are rare. The first radiocarbon date from Covoli... more Absolute dates of cave bears from Northern Italy are rare. The first radiocarbon date from Covoli di Velo Cave (Verona Province, Veneto, N. Italy) from a cave bear first phalanx is reported; its value is 29,130 ± 0.90 14 C yr BP. The date, combined with morphological features of dentition suggest that cave bear populations that lived in Northern Italy were relatively underived compared to other European populations, hinting at patters of migration. Comparison of dental morphology suggest that the Covoli di Velo bear is Ursus spelaeus.
Journal of Cave and Karst Studies, 2018
Absolute dates of cave bears from Northern Italy are rare. The first radiocarbon date from Covoli... more Absolute dates of cave bears from Northern Italy are rare. The first radiocarbon date from Covoli di Velo Cave (Verona Province, Veneto, N. Italy) from a cave bear first phalanx is reported; its value is 29,130 ± 0.90 14 C yr BP. The date, combined with morphological features of dentition suggest that cave bear populations that lived in Northern Italy were relatively underived compared to other European populations, hinting at patters of migration. Comparison of dental morphology suggest that the Covoli di Velo bear is Ursus spelaeus.
Additional file 2: Figure S1. Identification of scaffolds linked to chromosome X using sequencing... more Additional file 2: Figure S1. Identification of scaffolds linked to chromosome X using sequencing coverage and scaffold length. Green dots correspond to scaffolds assigned as linked to chromosome X. The red lines indicate the median coverage for all scaffolds. The blue lines represent half the median coverage which corresponds to the coverage of scaffolds linked to chromosome X. Figure S2. Past demography for moose (Alces alces) using PSMC. Thin lines represent 100 bootstrap runs. The x-axis corresponds to time before present in years on a log scale, assuming an estimated substitution rate of 0.7 × 10− 8 substitutions/site/generation [30] and a generation time of 7 years [31]. The y-axis corresponds to the effective population size Ne. Figure S3. Past demography for moose (Alces alces) using a Bayesian Skyline Plot (BSP). Demographic reconstruction was inferred in BEAST using 14 European 16,693 bp mitogenomes. Timing of events was estimated assuming a mean rate of 9 × 10− 9 substitu...
Additional file 2: Figure S1. Identification of scaffolds linked to chromosome X using sequencing... more Additional file 2: Figure S1. Identification of scaffolds linked to chromosome X using sequencing coverage and scaffold length. Green dots correspond to scaffolds assigned as linked to chromosome X. The red lines indicate the median coverage for all scaffolds. The blue lines represent half the median coverage which corresponds to the coverage of scaffolds linked to chromosome X. Figure S2. Past demography for moose (Alces alces) using PSMC. Thin lines represent 100 bootstrap runs. The x-axis corresponds to time before present in years on a log scale, assuming an estimated substitution rate of 0.7 × 10− 8 substitutions/site/generation [30] and a generation time of 7 years [31]. The y-axis corresponds to the effective population size Ne. Figure S3. Past demography for moose (Alces alces) using a Bayesian Skyline Plot (BSP). Demographic reconstruction was inferred in BEAST using 14 European 16,693 bp mitogenomes. Timing of events was estimated assuming a mean rate of 9 × 10− 9 substitu...
Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh-O18_06_2014&quo... more Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh-O18_06_2014" project. 12 samples collected in 2014 in Bangladesh.
Delta-18O and Delta-D ratio measurements of groundwater from the "SI Dripwater" project... more Delta-18O and Delta-D ratio measurements of groundwater from the "SI Dripwater" project. 124 samples collected from dripwater in Vietnam in 2013.
Delta-18O and Delta-D ratio measurements of water from the "S4P" project. 821 samples c... more Delta-18O and Delta-D ratio measurements of water from the "S4P" project. 821 samples collected from Feb, 2011 to April 2012.
Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh-O18_06_2014&quo... more Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh-O18_06_2014" project. 12 samples collected in 2014 in Bangladesh.
Delta-18O and Delta-D ratio measurements of water from the "AU1121" project. 455 sample... more Delta-18O and Delta-D ratio measurements of water from the "AU1121" project. 455 samples collected in 2010/2011 on the research vessel Aurora Australis along parts of the Antarctic continental margin.
Delta-18O and Delta-D ratio measurements of groundwater from the "SI Dripwater" project... more Delta-18O and Delta-D ratio measurements of groundwater from the "SI Dripwater" project. 124 samples collected from dripwater in Vietnam in 2013.
Delta-18O and Delta-D ratio measurements of water from the "Switchyard-12" project. 160... more Delta-18O and Delta-D ratio measurements of water from the "Switchyard-12" project. 160 samples collected in April to May, 2012 in the Arctic Ocean.
Delta-18O and Delta-D ratio measurements of water from the "S4P" project. 821 samples c... more Delta-18O and Delta-D ratio measurements of water from the "S4P" project. 821 samples collected from Feb, 2011 to April 2012.
Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh O18_09_2012&quo... more Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh O18_09_2012" project. 11 samples collected in May/2012 in Iceland.
Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh O18" proje... more Delta-18O and Delta-D ratio measurements of groundwater from the "Bangladesh O18" project. 278 samples collected from 2009 to 2011 in Bangladesh.
Delta-18O and Delta-D ratio measurements of water from the "AU1121" project. 455 sample... more Delta-18O and Delta-D ratio measurements of water from the "AU1121" project. 455 samples collected in 2010/2011 on the research vessel Aurora Australis along parts of the Antarctic continental margin.
Delta-18O and Delta-D ratio measurements of water from the "Switchyard-12" project. 160... more Delta-18O and Delta-D ratio measurements of water from the "Switchyard-12" project. 160 samples collected in April to May, 2012 in the Arctic Ocean.
In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island i... more In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island in the western Arabian Sea were investigated through a new set of high-precision U-series and radiocarbon (14C) dates. The data reveal an extreme case of very high and also climate dependent DCF values. For M1-5 an average DCF of 56.2 ± 3.4 % is observed between 27 and 18 kyr BP. Such high DCF values indicate a high influence of aged soil organic matter (SOM) and nearly completely closed system carbonate dissolution conditions. Towards the end of the last glacial period decreasing Mg/Ca ratios suggest an increase in precipitation which caused a marked change in the soil carbon cycling as indicated by sharply decreasing DCF. This is in contrast to the relation of soil infiltration and reservoir age observed in stalagmites from temperate zones. For Socotra Island, which is influenced by the East African-Indian monsoon, we propose that more humid conditions and enhanced net-infiltration afte...
In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island i... more In this study, the dead carbon fraction (DCF) variations in stalagmite M1-5 from Socotra Island in the western Arabian Sea were investigated through a new set of high-precision U-series and radiocarbon (14C) dates. The data reveal an extreme case of very high and also climate dependent DCF values. For M1-5 an average DCF of 56.2 ± 3.4 % is observed between 27 and 18 kyr BP. Such high DCF values indicate a high influence of aged soil organic matter (SOM) and nearly completely closed system carbonate dissolution conditions. Towards the end of the last glacial period decreasing Mg/Ca ratios suggest an increase in precipitation which caused a marked change in the soil carbon cycling as indicated by sharply decreasing DCF. This is in contrast to the relation of soil infiltration and reservoir age observed in stalagmites from temperate zones. For Socotra Island, which is influenced by the East African-Indian monsoon, we propose that more humid conditions and enhanced net-infiltration afte...
