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1. Ecological Classification in Forest Ecosystem Management: Links Between Current Practices and Future Climate Change in a Québec Case Study

Author

Grondin, Pierre, Brice, Marie-Hélène, Boulanger, Yan, Morneau, Claude, Couillard, Pierre-Luc, Richard, Pierre J. H., Chalumeau, Aurélie, Poirier, Véronique, Stoffel, Markus, Series Editor, Cramer, Wolfgang, Advisory Editor, Luterbacher, Urs, Advisory Editor, Toth, F., Advisory Editor, Girona, Miguel Montoro, editor, Morin, Hubert, editor, Gauthier, Sylvie, editor, and Bergeron, Yves, editor

Published
2023
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2. Tropical peatland carbon storage linked to global latitudinal trends in peat recalcitrance

Author

Hodgkins, Suzanne B., Richardson, Curtis J., Dommain, René, Wang, Hongjun, Glaser, Paul H., Verbeke, Brittany, Winkler, B. Rose, Cobb, Alexander R., Rich, Virginia I., Missilmani, Malak, Flanagan, Neal, Ho, Mengchi, Hoyt, Alison M., Harvey, Charles F., Vining, S. Rose, Hough, Moira A., Moore, Tim R., Richard, Pierre J. H., De La Cruz, Florentino B., Toufaily, Joumana, Hamdan, Rasha, Cooper, William T., and Chanton, Jeffrey P.

Published
2018
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3. The Reading Palaeofire Database: an expanded global resource to document changes in fire regimes from sedimentary charcoal records

Author

Harrison, Sandy P., Villegas-Diaz, Roberto, Cruz-Silva, Esmeralda, Gallagher, Daniel, Kesner, David, Lincoln, Paul, Shen, Yicheng, Sweeney, Luke, Colombaroli, Daniele, Ali, Adam, Barhoumi, Chéïma, Bergeron, Yves, Blyakharchuk, Tatiana, Bobek, Prërmysl, Bradshaw, Richard, Clear, Jennif L., Czerwiski, Sambor, Daniau, Anne-Laure, Dodson, John, Edwards, Kevin J., Edwards, Mary E., Feurdean, Angelica, Foster, David, Gajewski, Konrad, Galka, Mariusz, Garneau, Michelle, Giesecke, Thomas, Gil Romera, Graciela, Girardin, Martin P., Hoefer, Dana, Huang, Kangyou, Inoue, Jun, Jamrichová, Eva, Jasiunas, Nauris, Jiang, Wenying, Jiménez-Moreno, Gonzalo, Karpinska-Kolaczek, Monika, Kolaczek, Piotr, Kuosmanen, Niina, Lamentowicz, Mariusz, Lavoie, Martin, Li, Fang, Li, Jianyong, Lisitsyna, Olga, López-Sáez, Jose Antonio, Luelmo-Lautenschlaege, Reyes, Magnan, Gabriel, Katalin, Eniko, Magyari, katalin, Maksims, Alekss, Marcisz, Katarzyna, Marinova, Elena, Marlon, Jenn, Mensing, Scott, Miroslaw-Grabowska, Joanna, Oswald, Wyatt, Pérez Díaz, Sebastián, Pérez-Obiol, Ramón, Piilo, Sanna, Poska, Anneli, Qin, Xiaoguang, Remy, Cécile C., Richard, Pierre J. H., Salonen, Sakari, Sasaki, Naoko, Schneider, Hieke, Shotyk, William, Stancikaite, Migle, Steinberga, Dace, Stivrins, Nomunds, Takahara, Hikaru, Tan, Zhihai, Trasune, Liva, Umbanhowar, Charles E., Väliranta, Minna, Vassiljev, Jüri, Xiao, Xiayun, Xu, Qinghai, Xu, Xin, Zawisza, Edyta, Zhao, Yand, Zhou, Zheng, Paillard, Jordan, and Universidad de Cantabria

Abstract

Sedimentary charcoal records are widely used to reconstruct regional changes in fire regimes through time in the geological past. Existing global compilations are not geographically comprehensive and do not provide consistent metadata for all sites. Furthermore, the age models provided for these records are not harmonised and many are based on older calibrations of the radiocarbon ages. These issues limit the use of existing compilations for research into past fire regimes. Here, we present an expanded database of charcoal records, accompanied by new age models based on recalibration of radiocarbon ages using IntCal20 and Bayesian age-modelling software. We document the structure and contents of the database, the construction of the age models, and the quality control measures applied. We also record the expansion of geographical coverage relative to previous charcoal compilations and the expansion of metadata that can be used to inform analyses.

Published
2022

4. The Reading Palaeofire Database: an expanded global resource to document changes in fire regimes from sedimentary charcoal records

Author

European Commission, German Research Foundation, López Sáez, José Antonio [0000-0002-3122-2744], Luelmo Lautenschlaeger, Reyes [0000-0002-4505-2416], Romera, S. [0000-0001-5726-2536], Pérez Díaz, Sebastián [0000-0002-2702-0058], Harrison, Sandy P., Villegas, Roberto, Cruz-Silva, Esmeralda, Gallagher, Daniel, Kesner, David, Lincoln, Paul, Shen, Yicheng, Sweeney, Luke, Colombaroli, Daniele, Ali, Adam, Barhoumi, Chéïma, Bergeron, Yves, Blyakharchuk, Tatiana A., Bobek, Přemysl, Bradshaw, Richard, Clear, Jennifer L., Czerwiński, S., Daniau, A. L., Dodson, John, Edwards, Kevin J., Edwards, M.E., Feurdean, Angelica, Foster, David, Gajewski, Konrad, Galka, Mariusz, Garneau, Michelle, Giesecke, Thomas, Romera, S., Girardin, Martin P., Hoefer, Dana, Huang, Kangyou, Inoue, Jun, Jamrichová, Eva, Jasiunas, N., Jiang, Wenying, Jiménez Moreno, Gonzalo, Karpińska‐Kołaczek, Monika, Kołaczek, P., Kuosmanen, Niina, Lamentowicz, Mariusz, Lavoie, Martin, Li, Fang, Li, Jianyong, Lisitsyna, Olga, López Sáez, José Antonio, Luelmo Lautenschlaeger, Reyes, Magnan, Gabriel, Magyari, Enikö Katalin, Maksims, Alekss, Marcisz, K., Marinova, Elena, Marlon, Jenn, Mensing, S., Miroslaw-Grabowska, Joanna, Oswald, Wyatt, Pérez Díaz, Sebastián, Pérez-Obiol, Ramón, Piilo, Sanna, Poska, A., Qin, Xiaoguang, Remy, Cécile C., Richard, Pierre J. H., Salonen, J. Sakari, Sasaki, Naoko, Schneider, Hieke, Shotyk, William, Stancikaite, Migle, Šteinberga, Dace, Stivrins, Normunds, Takahara, Hikaru, Tan, Zhihai, Trasune, Liva, Umbanhowar, Charles E., Väliranta, Minna, Vassiljev, Jüri, Xiao, Xiayun, Xu, Qinghai, Xu, Xin, Zawisza, Edyta, Zhao, Yan, Zhou, Zheng, Paillard, Jordan, European Commission, German Research Foundation, López Sáez, José Antonio [0000-0002-3122-2744], Luelmo Lautenschlaeger, Reyes [0000-0002-4505-2416], Romera, S. [0000-0001-5726-2536], Pérez Díaz, Sebastián [0000-0002-2702-0058], Harrison, Sandy P., Villegas, Roberto, Cruz-Silva, Esmeralda, Gallagher, Daniel, Kesner, David, Lincoln, Paul, Shen, Yicheng, Sweeney, Luke, Colombaroli, Daniele, Ali, Adam, Barhoumi, Chéïma, Bergeron, Yves, Blyakharchuk, Tatiana A., Bobek, Přemysl, Bradshaw, Richard, Clear, Jennifer L., Czerwiński, S., Daniau, A. L., Dodson, John, Edwards, Kevin J., Edwards, M.E., Feurdean, Angelica, Foster, David, Gajewski, Konrad, Galka, Mariusz, Garneau, Michelle, Giesecke, Thomas, Romera, S., Girardin, Martin P., Hoefer, Dana, Huang, Kangyou, Inoue, Jun, Jamrichová, Eva, Jasiunas, N., Jiang, Wenying, Jiménez Moreno, Gonzalo, Karpińska‐Kołaczek, Monika, Kołaczek, P., Kuosmanen, Niina, Lamentowicz, Mariusz, Lavoie, Martin, Li, Fang, Li, Jianyong, Lisitsyna, Olga, López Sáez, José Antonio, Luelmo Lautenschlaeger, Reyes, Magnan, Gabriel, Magyari, Enikö Katalin, Maksims, Alekss, Marcisz, K., Marinova, Elena, Marlon, Jenn, Mensing, S., Miroslaw-Grabowska, Joanna, Oswald, Wyatt, Pérez Díaz, Sebastián, Pérez-Obiol, Ramón, Piilo, Sanna, Poska, A., Qin, Xiaoguang, Remy, Cécile C., Richard, Pierre J. H., Salonen, J. Sakari, Sasaki, Naoko, Schneider, Hieke, Shotyk, William, Stancikaite, Migle, Šteinberga, Dace, Stivrins, Normunds, Takahara, Hikaru, Tan, Zhihai, Trasune, Liva, Umbanhowar, Charles E., Väliranta, Minna, Vassiljev, Jüri, Xiao, Xiayun, Xu, Qinghai, Xu, Xin, Zawisza, Edyta, Zhao, Yan, Zhou, Zheng, and Paillard, Jordan

Abstract

Sedimentary charcoal records are widely used to reconstruct regional changes in fire regimes through time in the geological past. Existing global compilations are not geographically comprehensive and do not provide consistent metadata for all sites. Furthermore, the age models provided for these records are not harmonised and many are based on older calibrations of the radiocarbon ages. These issues limit the use of existing compilations for research into past fire regimes. Here, we present an expanded database of charcoal records, accompanied by new age models based on recalibration of radiocarbon ages using IntCal20 and Bayesian age-modelling software. We document the structure and contents of the database, the construction of the age models, and the quality control measures applied. We also record the expansion of geographical coverage relative to previous charcoal compilations and the expansion of metadata that can be used to inform analyses. This first version of the Reading Palaeofire Database contains 1676 records (entities) from 1480 sites worldwide. The database (RPDv1b – Harrison et al., 2021) is available at https://doi.org/10.17864/1947.000345.

Published
2022

6. The Reading Palaeofire Database: an expanded global resource to document changes in fire regimes from sedimentary charcoal records

Author

Harrison, Sandy P., primary, Villegas-Diaz, Roberto, additional, Cruz-Silva, Esmeralda, additional, Gallagher, Daniel, additional, Kesner, David, additional, Lincoln, Paul, additional, Shen, Yicheng, additional, Sweeney, Luke, additional, Colombaroli, Daniele, additional, Ali, Adam, additional, Barhoumi, Chéïma, additional, Bergeron, Yves, additional, Blyakharchuk, Tatiana, additional, Bobek, Přemysl, additional, Bradshaw, Richard, additional, Clear, Jennifer L., additional, Czerwiński, Sambor, additional, Daniau, Anne-Laure, additional, Dodson, John, additional, Edwards, Kevin J., additional, Edwards, Mary E., additional, Feurdean, Angelica, additional, Foster, David, additional, Gajewski, Konrad, additional, Gałka, Mariusz, additional, Garneau, Michelle, additional, Giesecke, Thomas, additional, Gil Romera, Graciela, additional, Girardin, Martin P., additional, Hoefer, Dana, additional, Huang, Kangyou, additional, Inoue, Jun, additional, Jamrichová, Eva, additional, Jasiunas, Nauris, additional, Jiang, Wenying, additional, Jiménez-Moreno, Gonzalo, additional, Karpińska-Kołaczek, Monika, additional, Kołaczek, Piotr, additional, Kuosmanen, Niina, additional, Lamentowicz, Mariusz, additional, Lavoie, Martin, additional, Li, Fang, additional, Li, Jianyong, additional, Lisitsyna, Olga, additional, López-Sáez, José Antonio, additional, Luelmo-Lautenschlaeger, Reyes, additional, Magnan, Gabriel, additional, Magyari, Eniko Katalin, additional, Maksims, Alekss, additional, Marcisz, Katarzyna, additional, Marinova, Elena, additional, Marlon, Jenn, additional, Mensing, Scott, additional, Miroslaw-Grabowska, Joanna, additional, Oswald, Wyatt, additional, Pérez-Díaz, Sebastián, additional, Pérez-Obiol, Ramón, additional, Piilo, Sanna, additional, Poska, Anneli, additional, Qin, Xiaoguang, additional, Remy, Cécile C., additional, Richard, Pierre J. H., additional, Salonen, Sakari, additional, Sasaki, Naoko, additional, Schneider, Hieke, additional, Shotyk, William, additional, Stancikaite, Migle, additional, Šteinberga, Dace, additional, Stivrins, Normunds, additional, Takahara, Hikaru, additional, Tan, Zhihai, additional, Trasune, Liva, additional, Umbanhowar, Charles E., additional, Väliranta, Minna, additional, Vassiljev, Jüri, additional, Xiao, Xiayun, additional, Xu, Qinghai, additional, Xu, Xin, additional, Zawisza, Edyta, additional, Zhao, Yan, additional, Zhou, Zheng, additional, and Paillard, Jordan, additional

Published
2022
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10. A simple field method for estimating the mass of organic carbon stored in undisturbed wetland soils.

Author

Magnan, Gabriel, Garneau, Michelle, Beaulne, Joannie, Lavoie, Martin, Pellerin, Stéphanie, Perrier, Léonie, Richard, Pierre J. H., and Sanderson, Nicole

Abstract

We have compiled a large dataset of peat and soil cores from temperate and boreal regions of eastern Canada to develop a simple field method for estimating the mass of soil organic carbon (SOC) stored in undisturbed wetlands (peatlands, swamps and marshes). We show that it is possible to predict the SOC mass in different wetland types by measuring the organic-rich soil layer thickness in the field. Using this new dataset, we found that SOC mass can be estimated either by using the linear regression equation between peat or soil thickness and SOC mass or by multiplying peat or soil thickness by a mean SOC density. We also show that SOC mass can be estimated by determining the degree of peat humification in the northern peatlands investigated. In this dataset, the precision of estimates is higher for peatlands than mineral wetlands (marshes and swamps), mainly due to the lack of empirical soil core data. The simple approach proposed here could be applied in different wetland regions worldwide where carbon density data from soil cores are available. This cost- and timeefficient method could benefit regional or national-scale carbon inventories. [ABSTRACT FROM AUTHOR]

Published
2023
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11. An updated radiocarbon-based ice margin chronology for the last deglaciation of the North American Ice Sheet Complex

Author

Dalton, April S., Margold, Martin, Stokes, Chris R., Tarasov, Lev, Dyke, Arthur S., Adams, Roberta S., Allard, Serge, Arends, Heather E., Atkinson, Nigel, Attig, John W., Barnett, Peter J., Barnett, Robert L., Batterson, Martin, Bernatchez, Pascal, Borns, Harold W., Breckenridge, Andy, Briner, Jason P., Brouard, Etienne, Campbell, Janet E., Carlson, Anders E., Clague, John J., Curry, B. Brandon, Daigneault, Robert-Andre, Dube-Loubert, Hugo, Easterbrook, Don J., Franzi, David A., Friedrich, Hannah G., Funder, Svend, Gauthier, Michelle S., Gowan, Angela S., Harris, Ken L., Hetu, Bernard, Hooyer, Tom S., Jennings, Carrie E., Johnson, Mark D., Kehew, Alan E., Kelley, Samuel E., Kerr, Daniel, King, Edward L., Kjeldsen, Kristian K., Knaeble, Alan R., Lajeunesse, Patrick, Lakeman, Thomas R., Lamothe, Michel, Larson, Phillip, Lavoie, Martin, Loope, Henry M., Lowell, Thomas, Lusardi, Barbara A., Manz, Lorraine, McMartin, Isabelle, Nixon, F. Chantel, Occhietti, Serge, Parkhill, Michael A., Piper, David J. W., Pronk, Antonius G., Richard, Pierre J. H., Ridge, John C., Ross, Martin, Roy, Martin, Seaman, Allen, Shaw, John, Stea, Rudolph R., Teller, James T., Thompson, Woodrow B., Thorleifson, L. Harvey, Utting, Daniel J., Veillette, Jean J., Ward, Brent C., Weddle, Thomas K., Wright, Herbert E., Dalton, April S., Margold, Martin, Stokes, Chris R., Tarasov, Lev, Dyke, Arthur S., Adams, Roberta S., Allard, Serge, Arends, Heather E., Atkinson, Nigel, Attig, John W., Barnett, Peter J., Barnett, Robert L., Batterson, Martin, Bernatchez, Pascal, Borns, Harold W., Breckenridge, Andy, Briner, Jason P., Brouard, Etienne, Campbell, Janet E., Carlson, Anders E., Clague, John J., Curry, B. Brandon, Daigneault, Robert-Andre, Dube-Loubert, Hugo, Easterbrook, Don J., Franzi, David A., Friedrich, Hannah G., Funder, Svend, Gauthier, Michelle S., Gowan, Angela S., Harris, Ken L., Hetu, Bernard, Hooyer, Tom S., Jennings, Carrie E., Johnson, Mark D., Kehew, Alan E., Kelley, Samuel E., Kerr, Daniel, King, Edward L., Kjeldsen, Kristian K., Knaeble, Alan R., Lajeunesse, Patrick, Lakeman, Thomas R., Lamothe, Michel, Larson, Phillip, Lavoie, Martin, Loope, Henry M., Lowell, Thomas, Lusardi, Barbara A., Manz, Lorraine, McMartin, Isabelle, Nixon, F. Chantel, Occhietti, Serge, Parkhill, Michael A., Piper, David J. W., Pronk, Antonius G., Richard, Pierre J. H., Ridge, John C., Ross, Martin, Roy, Martin, Seaman, Allen, Shaw, John, Stea, Rudolph R., Teller, James T., Thompson, Woodrow B., Thorleifson, L. Harvey, Utting, Daniel J., Veillette, Jean J., Ward, Brent C., Weddle, Thomas K., and Wright, Herbert E.

Abstract

The North American Ice Sheet Complex (NAISC; consisting of the Laurentide, Cordilleran and Innuitian ice sheets) was the largest ice mass to repeatedly grow and decay in the Northern Hemisphere during the Quaternary. Understanding its pattern of retreat following the Last Glacial Maximum is critical for studying many facets of the Late Quaternary, including ice sheet behaviour, the evolution of Holocene landscapes, sea level, atmospheric circulation, and the peopling of the Americas. Currently, the most up-to-date and authoritative margin chronology for the entire ice sheet complex is featured in two publications (Geological Survey of Canada Open File 1574 [Dyke et al., 2003]; 'Quaternary Glaciations - Extent and Chronology, Part II' [Dyke, 2004]). These often-cited datasets track ice margin recession in 36 time slices spanning 18 ka to 1 ka (all ages in uncalibrated radiocarbon years) using a combination of geomorphology, stratigraphy and radiocarbon dating. However, by virtue of being over 15 years old, the ice margin chronology requires updating to reflect new work and important revisions. This paper updates the aforementioned 36 ice margin maps to reflect new data from regional studies. We also update the original radiocarbon dataset from the 2003/2004 papers with 1541 new ages to reflect work up to and including 2018. A major revision is made to the 18 ka ice margin, where Banks and Eglinton islands (once considered to be glacial refugia) are now shown to be fully glaciated. Our updated 18 ka ice sheet increased in areal extent from 17.81 to 18.37 million km(2), which is an increase of 3.1% in spatial coverage of the NAISC at that time. Elsewhere, we also summarize, region-by-region, significant changes to the deglaciation sequence. This paper integrates new information provided by regional experts and radiocarbon data into the deglaciation sequence while maintaining consistency with the original ice margin positions of Dyke et al. (2003) and Dyke (2004) whe

Published
2020

12. Tropical peatland carbon storage linked to global latitudinal trends in peat recalcitrance

Author

Massachusetts Institute of Technology. Department of Civil and Environmental Engineering, Hodgkins, Suzanne B., Richardson, Curtis J., Dommain, René, Wang, Hongjun, Glaser, Paul H., Verbeke, Brittany, Winkler, B. Rose, Cobb, Alexander R., Rich, Virginia I., Missilmani, Malak, Flanagan, Neal, Ho, Mengchi, Hoyt, Alison M., Harvey, Charles F, Vining, S. Rose, Hough, Moira A., Moore, Tim R., Richard, Pierre J. H., De La Cruz, Florentino B., Toufaily, Joumana, Hamdan, Rasha, Cooper, William T., Chanton, Jeffrey P., Massachusetts Institute of Technology. Department of Civil and Environmental Engineering, Hodgkins, Suzanne B., Richardson, Curtis J., Dommain, René, Wang, Hongjun, Glaser, Paul H., Verbeke, Brittany, Winkler, B. Rose, Cobb, Alexander R., Rich, Virginia I., Missilmani, Malak, Flanagan, Neal, Ho, Mengchi, Hoyt, Alison M., Harvey, Charles F, Vining, S. Rose, Hough, Moira A., Moore, Tim R., Richard, Pierre J. H., De La Cruz, Florentino B., Toufaily, Joumana, Hamdan, Rasha, Cooper, William T., and Chanton, Jeffrey P.

Abstract

Peatlands represent large terrestrial carbon banks. Given that most peat accumulates in boreal regions, where low temperatures and water saturation preserve organic matter, the existence of peat in (sub)tropical regions remains enigmatic. Here we examined peat and plant chemistry across a latitudinal transect from the Arctic to the tropics. Near-surface low-latitude peat has lower carbohydrate and greater aromatic content than near-surface high-latitude peat, creating a reduced oxidation state and resulting recalcitrance. This recalcitrance allows peat to persist in the (sub)tropics despite warm temperatures. Because we observed similar declines in carbohydrate content with depth in high-latitude peat, our data explain recent field-scale deep peat warming experiments in which catotelm (deeper) peat remained stable despite temperature increases up to 9 °C. We suggest that high-latitude deep peat reservoirs may be stabilized in the face of climate change by their ultimately lower carbohydrate and higher aromatic composition, similar to tropical peats., National Science Foundation (Grant 1114155), National Science Foundation (Grant 1114161), NSF (Award 0628647), US Department of Energy, Office of Science, Office of Biological and Environmental Research (contract DE-SC0012088), US Department of Energy Office of Biological and Environmental Research under the Genomic Science program (Award DE-SC0004632), US Department of Energy Office of Biological and Environmental Research under the Genomic Science program (Award DE-SC0010580), US Department of Energy Office of Biological and Environmental Research under the Genomic Science program (Award DE-SC0016440), NASA Interdisciplinary Studies in Earth Science program (Award NNX17AK10G), US Department of Energy Office of Biological and Environmental Research under the Terrestrial Ecosystem Sciences program (Award DE-SC0012272)

Published
2020

17. A database and synthesis of northern peatland soil properties and Holocene carbon and nitrogen accumulation

Author

Loisel, Julie, Yu, Zicheng, Beilman, David W., Camill, Philip, Alm, Jukka, Amesbury, Matthew J., Anderson, David, Andersson, Sofia, Bochicchio, Christopher, Barber, Keith, Belyea, Lisa R., Bunbury, Joan, Chambers, Frank M., Charman, Daniel J., De Vleeschouwer, Francois, Fialkiewicz-Koziel, Barbara, Finkelstein, Sarah A., Galka, Mariusz, Garneau, Michelle, Hammarlund, Dan, Hinchcliffe, William, Holmquist, James, Hughes, Paul, Jones, Miriam C., Klein, Eric S., Kokfelt, Ulla, Korhola, Atte, Kuhry, Peter, Lamarre, Alexandre, Lamentowicz, Mariusz, Large, David, Lavoie, Martin, MacDonald, Glen, Magnan, Gabriel, Makila, Markku, Mallon, Gunnar, Mathijssen, Paul, Mauquoy, Dmitri, McCarroll, Julia, Moore, Tim R., Nichols, Jonathan, O'Reilly, Benjamin, Oksanen, Pirita, Packalen, Maara, Peteet, Dorothy, Richard, Pierre J. H., Robinson, Stephen, Ronkainen, Tiina, Rundgren, Mats, Sannel, A. Britta K., Tarnocai, Charles, Thom, Tim, Tuittila, Eeva-Stiina, Turetsky, Merritt, Valiranta, Minna, van der Linden, Marjolein, van Geel, Bas, van Bellen, Simon, Vitt, Dale, Zhao, Yan, Zhou, Weijian, Loisel, Julie, Yu, Zicheng, Beilman, David W., Camill, Philip, Alm, Jukka, Amesbury, Matthew J., Anderson, David, Andersson, Sofia, Bochicchio, Christopher, Barber, Keith, Belyea, Lisa R., Bunbury, Joan, Chambers, Frank M., Charman, Daniel J., De Vleeschouwer, Francois, Fialkiewicz-Koziel, Barbara, Finkelstein, Sarah A., Galka, Mariusz, Garneau, Michelle, Hammarlund, Dan, Hinchcliffe, William, Holmquist, James, Hughes, Paul, Jones, Miriam C., Klein, Eric S., Kokfelt, Ulla, Korhola, Atte, Kuhry, Peter, Lamarre, Alexandre, Lamentowicz, Mariusz, Large, David, Lavoie, Martin, MacDonald, Glen, Magnan, Gabriel, Makila, Markku, Mallon, Gunnar, Mathijssen, Paul, Mauquoy, Dmitri, McCarroll, Julia, Moore, Tim R., Nichols, Jonathan, O'Reilly, Benjamin, Oksanen, Pirita, Packalen, Maara, Peteet, Dorothy, Richard, Pierre J. H., Robinson, Stephen, Ronkainen, Tiina, Rundgren, Mats, Sannel, A. Britta K., Tarnocai, Charles, Thom, Tim, Tuittila, Eeva-Stiina, Turetsky, Merritt, Valiranta, Minna, van der Linden, Marjolein, van Geel, Bas, van Bellen, Simon, Vitt, Dale, Zhao, Yan, and Zhou, Weijian

Abstract

Here, we present results from the most comprehensive compilation of Holocene peat soil properties with associated carbon and nitrogen accumulation rates for northern peatlands. Our database consists of 268 peat cores from 215 sites located north of 45 degrees N. It encompasses regions within which peat carbon data have only recently become available, such as the West Siberia Lowlands, the Hudson Bay Lowlands, Kamchatka in Far East Russia, and the Tibetan Plateau. For all northern peatlands, carbon content in organic matter was estimated at 42 +/- 3% (standard deviation) for Sphagnum peat, 51 +/- 2% for non-Sphagnum peat, and at 49 +/- 2% overall. Dry bulk density averaged 0.12 +/- 0.07 g/cm(3), organic matter bulk density averaged 0.11 +/- 0.05 g/cm(3), and total carbon content in peat averaged 47 +/- 6%. In general, large differences were found between Sphagnum and non-Sphagnum peat types in terms of peat properties. Time-weighted peat carbon accumulation rates averaged 23 +/- 2 (standard error of mean) g C/m(2)/yr during the Holocene on the basis of 151 peat cores from 127 sites, with the highest rates of carbon accumulation (25-28 g C/m(2)/yr) recorded during the early Holocene when the climate was warmer than the present. Furthermore, we estimate the northern peatland carbon and nitrogen pools at 436 and 10 gigatons, respectively. The database is publicly available at https://peatlands.lehigh.edu., AuthorCount:61

Published
2014
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38. Merci

Author

Richard, Pierre J. H., primary and Roy, André G., additional

Published
1999
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50. Holocene palaeoecological reconstruction of three boreal peatlands in the La Grande Rivière region, Québec, Canada.

Author

Beaulieu-Audy, Véronique, Garneau, Michelle, Richard, Pierre J. H., and Asnong, Hans

Subjects
RADIOCARBON dating, PALEOECOLOGY, HOLOCENE stratigraphic geology, HYDROGRAPHY, PEATLANDS
Abstract

Pollen and macrofossil analyses from central peat cores along with 23 radiocarbon dates were used in palaeoecological reconstructions for three peatlands (LG1, LG2 and LG3) within the lower La Grande Rivière watershed in northern boreal Québec. Basal ages from LG3 and LG2 indicate up to an 1100 years later and possibly more abrupt Tyrrell Sea retreat in the LG3 area compared with the timeline for the region. Both autogenic and allogenic factors were found to have influenced local vegetation succession and rates of peat accumulation. Internal autogenic factors such as peat accumulation were key elements for the general peatland developmental pathway that followed the classic hydrosere sequence (pond-fen-bog). Regional climate and hydrography are the main external factors associated with changes in vegetation assemblages, surface wetness and consequently rates of peat accumulation. The LG2 and LG3 peatlands began developing shortly after 7000 cal. BP as shallow ponds with herbaceous freshwater aquatic and emergent taxa. Both sites rapidly evolved into fens with brown mosses. The autogenic transition from fen to bog occurred at both sites between 6000 and 5500 cal. BP. A long-term decrease in peat accumulation rates corresponding to a gradual densification of the local tree and shrub cover occurred at the LG2 and LG3 sites between 5000 and 1500 cal. BP. These changes were simultaneous at the two sites and therefore suggest the influence of external factors such as a shift to cooler and drier climatic conditions from the middle to late Holocene (Neoglacial period). Development of the LG1 site was delayed by a much later Tyrrell Sea retreat and started with a relatively long eutrophic aquatic phase. Both internal factors (minerotrophic conditions) and external factors (local topography and climate) contributed to the somewhat slower pace of vegetation succession. Synchronous increased peat accumulation rates in the last 1500 years at the three sites are attributable to regional vegetational shifts possibly due to the influence of recent climatic conditions and lower peat compaction of the acrotelm. [ABSTRACT FROM AUTHOR]

Published
2009
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