TY - JOUR
T1 - Glacial Survival of Boreal Trees in Northern Scandinavia
AU - Parducci, Laura
AU - Jørgensen, Tina
AU - Tollefsrud, Mari Mette
AU - Elverland, Ellen
AU - Alm, Torbjørn
AU - Fontana, Sonia L.
AU - Bennett, Keith D.
AU - Haile, James
AU - Matetovici, Irina
AU - Suyama, Yoshihisa
AU - Edwards, Mary E.
AU - Andersen, Kenneth
AU - Rasmussen, Morten
AU - Boessenkool, Sanne
AU - Coissac, Eric
AU - Brochmann, Christian
AU - Taberlet, Pierre
AU - Houmark-Nielsen, Michael
AU - Larsen, Nicolaj Krog
AU - Orlando, Ludovic
AU - Gilbert, M.Thomas P.
AU - Kjær, Kurt H.
AU - Alsos, Inger Greve
AU - Willerslev, Eske
PY - 2012/3/2
Y1 - 2012/3/2
N2 - It is commonly believed that trees were absent in Scandinavia during the last glaciation and first recolonized the Scandinavian Peninsula with the retreat of its ice sheet some 9000 years ago. Here, we show the presence of a rare mitochondrial DNA haplotype of spruce that appears unique to Scandinavia and with its highest frequency to the west—an area believed to sustain ice-free refugia during most of the last ice age. We further show the survival of DNA from this haplotype in lake sediments and pollen of Trøndelag in central Norway dating back ~10,300 years and chloroplast DNA of pine and spruce in lake sediments adjacent to the
ice-free Andøya refugium in northwestern Norway as early as ~22,000 and 17,700 years ago, respectively. Our findings imply that conifer trees survived in ice-free refugia of Scandinavia during the last glaciation, challenging current views on survival and spread of trees as a response to climate changes.
AB - It is commonly believed that trees were absent in Scandinavia during the last glaciation and first recolonized the Scandinavian Peninsula with the retreat of its ice sheet some 9000 years ago. Here, we show the presence of a rare mitochondrial DNA haplotype of spruce that appears unique to Scandinavia and with its highest frequency to the west—an area believed to sustain ice-free refugia during most of the last ice age. We further show the survival of DNA from this haplotype in lake sediments and pollen of Trøndelag in central Norway dating back ~10,300 years and chloroplast DNA of pine and spruce in lake sediments adjacent to the
ice-free Andøya refugium in northwestern Norway as early as ~22,000 and 17,700 years ago, respectively. Our findings imply that conifer trees survived in ice-free refugia of Scandinavia during the last glaciation, challenging current views on survival and spread of trees as a response to climate changes.
U2 - 10.1126/science.1216043
DO - 10.1126/science.1216043
M3 - Article
SN - 0036-8075
VL - 335
SP - 1083
EP - 1086
JO - Science
JF - Science
IS - 6072
ER -