Christian Bigler - Academia.edu (original) (raw)
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Papers by Christian Bigler
Freshwater Biology, Dec 1, 2008
Journal of Environmental Management, Jun 1, 2009
Proceedings of the National Academy of Sciences of the United States of America, May 11, 2015
Limnology and Oceanography, May 1, 2009
Science of The Total Environment, May 1, 2023
EGU General Assembly Conference Abstracts, Apr 1, 2016
The Holocene, Jan 31, 2019
Environmental and Ecological Statistics, Jul 19, 2016
Journal of Applied Phycology, Dec 4, 2009
Organic Geochemistry, Jun 1, 2015
EGU General Assembly Conference Abstracts, Apr 1, 2013
AGU Fall Meeting Abstracts, Dec 16, 2014
2014 AGU Fall Meeting, Dec 19, 2014
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
Palaeogeography, Palaeoclimatology, Palaeoecology, Dec 1, 2017
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.
Quaternary International, 2004
Quaternary Science Reviews, Oct 1, 2015
Freshwater Biology, Dec 1, 2008
Journal of Environmental Management, Jun 1, 2009
Proceedings of the National Academy of Sciences of the United States of America, May 11, 2015
Limnology and Oceanography, May 1, 2009
Science of The Total Environment, May 1, 2023
EGU General Assembly Conference Abstracts, Apr 1, 2016
The Holocene, Jan 31, 2019
Environmental and Ecological Statistics, Jul 19, 2016
Journal of Applied Phycology, Dec 4, 2009
Organic Geochemistry, Jun 1, 2015
EGU General Assembly Conference Abstracts, Apr 1, 2013
AGU Fall Meeting Abstracts, Dec 16, 2014
2014 AGU Fall Meeting, Dec 19, 2014
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
Palaeogeography, Palaeoclimatology, Palaeoecology, Dec 1, 2017
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.
Quaternary International, 2004
Quaternary Science Reviews, Oct 1, 2015