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Papers by Christian Bigler

Research paper thumbnail of Composition and dispersal of riverine and lake phytoplankton communities in connected systems with different water retention times

Freshwater Biology, Dec 1, 2008

Research paper thumbnail of Environmental history: A piece in the puzzle for establishing plans for environmental management

Journal of Environmental Management, Jun 1, 2009

Research paper thumbnail of Early land use and centennial scale changes in lake-water organic carbon prior to contemporary monitoring

Proceedings of the National Academy of Sciences of the United States of America, May 11, 2015

Research paper thumbnail of Decadal diagenetic effects on δ<sup>13</sup> C and δ<sup>15</sup> N studied in varved lake sediment

Limnology and Oceanography, May 1, 2009

Research paper thumbnail of Effect of past century mining activities on sediment properties and toxicity to freshwater organisms in northern Sweden

Science of The Total Environment, May 1, 2023

Research paper thumbnail of Improved understanding of Diatom stratigraphy in a varved sediment through lake monitoring and sediment trap data

EGU General Assembly Conference Abstracts, Apr 1, 2016

Research paper thumbnail of Environmental footprint of small-scale, historical mining and metallurgy in the Swedish boreal forest landscape: The Moshyttan blast furnace as microcosm

The Holocene, Jan 31, 2019

Research paper thumbnail of Functional clustering of varved lake sediment to reconstruct past seasonal climate

Environmental and Ecological Statistics, Jul 19, 2016

Research paper thumbnail of A multi-proxy palaeoecological study of Alanen Laanijärvi, a boreal-forest lake in Swedish Lapland

Research paper thumbnail of Numerical simulations suggest that counting sums and taxonomic resolution of diatom analyses to determine IPS pollution and ACID acidity indices can be reduced

Journal of Applied Phycology, Dec 4, 2009

Research paper thumbnail of Seasonal changes in molecular composition of organic matter in lake sediment trap material from Nylandssjön, Sweden

Organic Geochemistry, Jun 1, 2015

Research paper thumbnail of Compaction of recent varved lake sediments

Research paper thumbnail of Calibration of biological lake sediment records: Tracing diatom assemblages through the water column into the sediment

EGU General Assembly Conference Abstracts, Apr 1, 2013

Research paper thumbnail of Tracking the Transformation and Preservation of Organic Biomarkers in a Varved Sediment-Core Series

AGU Fall Meeting Abstracts, Dec 16, 2014

Research paper thumbnail of Organic Carbon Dynamics beyond the Perspective of Monitoring: Impact of Historical Landscape Utilization on the Past Lake-Water Carbon Trajectory in Central Boreal Sweden

2014 AGU Fall Meeting, Dec 19, 2014

Research paper thumbnail of Spatial manifestation of the Little Ice Age in Alaska

AGU Fall Meeting Abstracts, Dec 1, 2005

We present here climate reconstructions of the past 1000 years on the basis of multiproxy sedimen... more We present here climate reconstructions of the past 1000 years on the basis of multiproxy sediment analyses at six lakes in three regions of Alaska: the northwestern Alaskan Range (Farewell Lake), the southern Brooks Range (Takahula, Malamute, and Omega Lakes), and the Copper River Basin in southeastern Alaska (Grizzly and Moose Lakes). All three regions show a consistent decline in

Research paper thumbnail of Regional Holocene climate and landscape changes recorded in the large subarctic lake Torneträsk, N Fennoscandia

Palaeogeography, Palaeoclimatology, Palaeoecology, Dec 1, 2017

Research paper thumbnail of Near-Infrared Spectroscopy (NIRS) of Epilithic Material in Streams has a Potential for Monitoring Impact from Mining

Environmental Science & Technology, Mar 17, 2007

There is an increasing demand for cost-effective methods for environmental monitoring, and here w... more There is an increasing demand for cost-effective methods for environmental monitoring, and here we assess the potential of near-infrared spectroscopy (NIRS) on epilithic material from streams (material covering submerged stones) as a new method for monitoring the impact of pollution from mining and mining-related industries. NIRS, a routine technique in industry, registers the chemical properties of organic material on a molecular level and can detect minute alterations in the composition of epilithic material. Epilithic samples from 65 stream sites (42 uncontaminated and 23 contaminated) in northern Sweden were analyzed. The NIRS approach was evaluated by comparing it with the results of chemical analyses and diatom analyses of the same samples. Based on Principal Component Analysis, the NIRS data distinguished contaminated from uncontaminated sites and performed slightly betterthan chemical analyses and clearly betterthan diatom analyses. Of the streams designated a priori as contaminated, 74% were identified as contaminated by NIRS, 65% were identified by chemical analysis, and 26% were identified by diatom analysis. Unlike chemical analyses of water samples, NIRS data reflect biological impacts in the streams, and the epilithic material integrates impact over time. Given that, and the simplicity of NIRS-analyses, further studies to assess the use of NIRS of epilithic material as an inexpensive environmental monitoring method are justified.

Research paper thumbnail of Similarities and discrepancies between chironomid- and diatom-inferred temperature reconstructions through the Holocene at Lake 850, northern Sweden

Quaternary International, 2004

Research paper thumbnail of Late-Holocene climate variability and ecosystem responses in Alaska inferred from high-resolution multiproxy sediment analyses at Grizzly Lake

Quaternary Science Reviews, Oct 1, 2015

Research paper thumbnail of Composition and dispersal of riverine and lake phytoplankton communities in connected systems with different water retention times

Freshwater Biology, Dec 1, 2008

Research paper thumbnail of Environmental history: A piece in the puzzle for establishing plans for environmental management

Journal of Environmental Management, Jun 1, 2009

Research paper thumbnail of Early land use and centennial scale changes in lake-water organic carbon prior to contemporary monitoring

Proceedings of the National Academy of Sciences of the United States of America, May 11, 2015

Research paper thumbnail of Decadal diagenetic effects on δ<sup>13</sup> C and δ<sup>15</sup> N studied in varved lake sediment

Limnology and Oceanography, May 1, 2009

Research paper thumbnail of Effect of past century mining activities on sediment properties and toxicity to freshwater organisms in northern Sweden

Science of The Total Environment, May 1, 2023

Research paper thumbnail of Improved understanding of Diatom stratigraphy in a varved sediment through lake monitoring and sediment trap data

EGU General Assembly Conference Abstracts, Apr 1, 2016

Research paper thumbnail of Environmental footprint of small-scale, historical mining and metallurgy in the Swedish boreal forest landscape: The Moshyttan blast furnace as microcosm

The Holocene, Jan 31, 2019

Research paper thumbnail of Functional clustering of varved lake sediment to reconstruct past seasonal climate

Environmental and Ecological Statistics, Jul 19, 2016

Research paper thumbnail of A multi-proxy palaeoecological study of Alanen Laanijärvi, a boreal-forest lake in Swedish Lapland

Research paper thumbnail of Numerical simulations suggest that counting sums and taxonomic resolution of diatom analyses to determine IPS pollution and ACID acidity indices can be reduced

Journal of Applied Phycology, Dec 4, 2009

Research paper thumbnail of Seasonal changes in molecular composition of organic matter in lake sediment trap material from Nylandssjön, Sweden

Organic Geochemistry, Jun 1, 2015

Research paper thumbnail of Compaction of recent varved lake sediments

Research paper thumbnail of Calibration of biological lake sediment records: Tracing diatom assemblages through the water column into the sediment

EGU General Assembly Conference Abstracts, Apr 1, 2013

Research paper thumbnail of Tracking the Transformation and Preservation of Organic Biomarkers in a Varved Sediment-Core Series

AGU Fall Meeting Abstracts, Dec 16, 2014

Research paper thumbnail of Organic Carbon Dynamics beyond the Perspective of Monitoring: Impact of Historical Landscape Utilization on the Past Lake-Water Carbon Trajectory in Central Boreal Sweden

2014 AGU Fall Meeting, Dec 19, 2014

Research paper thumbnail of Spatial manifestation of the Little Ice Age in Alaska

AGU Fall Meeting Abstracts, Dec 1, 2005

We present here climate reconstructions of the past 1000 years on the basis of multiproxy sedimen... more We present here climate reconstructions of the past 1000 years on the basis of multiproxy sediment analyses at six lakes in three regions of Alaska: the northwestern Alaskan Range (Farewell Lake), the southern Brooks Range (Takahula, Malamute, and Omega Lakes), and the Copper River Basin in southeastern Alaska (Grizzly and Moose Lakes). All three regions show a consistent decline in

Research paper thumbnail of Regional Holocene climate and landscape changes recorded in the large subarctic lake Torneträsk, N Fennoscandia

Palaeogeography, Palaeoclimatology, Palaeoecology, Dec 1, 2017

Research paper thumbnail of Near-Infrared Spectroscopy (NIRS) of Epilithic Material in Streams has a Potential for Monitoring Impact from Mining

Environmental Science & Technology, Mar 17, 2007

There is an increasing demand for cost-effective methods for environmental monitoring, and here w... more There is an increasing demand for cost-effective methods for environmental monitoring, and here we assess the potential of near-infrared spectroscopy (NIRS) on epilithic material from streams (material covering submerged stones) as a new method for monitoring the impact of pollution from mining and mining-related industries. NIRS, a routine technique in industry, registers the chemical properties of organic material on a molecular level and can detect minute alterations in the composition of epilithic material. Epilithic samples from 65 stream sites (42 uncontaminated and 23 contaminated) in northern Sweden were analyzed. The NIRS approach was evaluated by comparing it with the results of chemical analyses and diatom analyses of the same samples. Based on Principal Component Analysis, the NIRS data distinguished contaminated from uncontaminated sites and performed slightly betterthan chemical analyses and clearly betterthan diatom analyses. Of the streams designated a priori as contaminated, 74% were identified as contaminated by NIRS, 65% were identified by chemical analysis, and 26% were identified by diatom analysis. Unlike chemical analyses of water samples, NIRS data reflect biological impacts in the streams, and the epilithic material integrates impact over time. Given that, and the simplicity of NIRS-analyses, further studies to assess the use of NIRS of epilithic material as an inexpensive environmental monitoring method are justified.

Research paper thumbnail of Similarities and discrepancies between chironomid- and diatom-inferred temperature reconstructions through the Holocene at Lake 850, northern Sweden

Quaternary International, 2004

Research paper thumbnail of Late-Holocene climate variability and ecosystem responses in Alaska inferred from high-resolution multiproxy sediment analyses at Grizzly Lake

Quaternary Science Reviews, Oct 1, 2015

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