Leif Kullman
Datos Biográficos
| ID | 6018558 |
|---|---|
| NOMBRE | Leif Kullman |
| NOMBRES | Leif |
| APELLIDO | Kullman |
| FIRMA | KULLMAN L |
| AFILIACIONES | Umeå University |
| VERIFICADO | No |
| TOTAL DE OBRAS | 9 |
| TOTAL DE CITAS | 15 |
| TOTAL COMO AUTOR | 9 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 1988 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2015 |
| ÍNDICE H | 2 |
New Aspects of High-Mountain Palaeobiogeography
Recent recession of high-mountain glacier ice and perennial snow and ice patches has exposed megafossil and macrofossil tree remnants and peat, offering a new source of Holocene high alpine vegetation history in the Scandes. Radiocarbon dates of 90 tree megafossils from Swedish Lapland, 29 of which had not previously been published, range from 11 980 to 1950 cal yr BP. During the interval 9500 – 8500 cal yr BP, mountain birch (Betula pubescens ss…
Ancient Subalpine Clonal Spruces ( Picea abies )
This study addresses the long-standing issue of postglacial immigration of Picea abies (Norway spruce) into Scandinavia. The main methodological focus is on using megafossil tree remains (wood and cones) of spruce and other species retrieved from the treeline ecotone of the Swedish Scandes as a tool for vegetation reconstruction. The core data come from radiocarbon dating of megafossils preserved in the soil underneath clonal groups of Picea abie…
Wind-Conditioned 20th Century Decline of Birch Treeline Vegetation in the Swedish Scandes
The study focused on a frequent, although not dominant, mode of treeline change in the Swedish Scandes over the past century. Monitoring of stand density decline in a wind-exposed subalpine birch (Betula pubescens ssp. tortuosa) population was carried out over the past 30 years. The overall result included substantial and unbalanced individual mortality and a drastic reduction in stature of surviving birches. Radiocarbon dating of in situ subfoss…
A Richer, Greener and Smaller Alpine World
Th Century Climate Warming and Tree-limit Rise in the Southern Scandes of Sweden
Climate warming by ca. 0.8 degree C between the late-19th and late-20th century, although with some fluctuations, has forced multispecies elevational tree-limit advance by > 100 m for the principal tree species in the Swedish part of the Scandinavian mountain range. Predominantly, these processes imply growth in height of old-established individuals and less frequently upslope migration of new individuals. After a slight retardation during some c…
Th Century Climate Warming and Tree-limit Rise in the Southern Scandes of Sweden
Climate warming by ca. 0.8°C between the late-19th and late-20th century, although with some fluctuations, has forced multispecies elevational tree-limit advance by >100 m for the principal tree species in the Swedish part of the Scandinavian mountain range. Predominantly, these processes imply growth in height of old established individuals and less frequently upslope migration of new individuals. After a slight retardation during some cooler de…
Orbital Forcing and Tree-Limit History
The Holocene tree-limit history for an area in Swedish Lappland is analysed from a new set of 67 14 C-dated subfossil wood remains. The species involved are Scots pine ( Pinus sylvestris), mountain birch ( Betula pubescens ssp. tortuosa) and grey alder ( Alnus incana). The highest tree-limit was established about 8000 BP by pine. Up to the present it has retreated c. 200 m in altitude at a constant rate of c. 25 m per millennium. A subalpine belt…
Rapid Natural Decline of Upper Montane Forests in the Swedish Scandes
Unprecedented needle loss of mature forest stands occurred in natural Swedish montane forests during 1987. Pine (Pinus sylvestris L.) and spruce (Picea abies [L.] Karst.) needles turned reddish-brown during the spring and early summer. An intensive study within a severely damaged pine population indicated that damage was primarily due to a coincidence of shallow snow cover and severe cold from mid-December 1986 to mid-January 1987. This resulted …
Subalpine Picea abies Decline in the Swedish Scandes
Changes in vigour and demography of subalpine Picea abies (L.) Karst were assessed on a regional basis in the Swedish Scandes. The study was based on repeat photography from fixed points in 1972/73 and in 1985/86. Crown thinning was already in an advanced stage in 1972/73. Approximately 75 percent of the studied population had a crown thinning of more than 20 percent. This process progressed during the study period, when about 30 percent of the s…
Orbital Forcing and Tree-Limit History
The Holocene tree-limit history for an area in Swedish Lappland is analysed from a new set of 67 14 C-dated subfossil wood remains. The species involved are Scots pine ( Pinus sylvestris), mountain birch ( Betula pubescens ssp. tortuosa) and grey alder ( Alnus incana). The highest tree-limit was established about 8000 BP by pine. Up to the present it has retreated c. 200 m in altitude at a constant rate of c. 25 m per millennium. A subalpine belt…
Th Century Climate Warming and Tree-limit Rise in the Southern Scandes of Sweden
Climate warming by ca. 0.8 degree C between the late-19th and late-20th century, although with some fluctuations, has forced multispecies elevational tree-limit advance by > 100 m for the principal tree species in the Swedish part of the Scandinavian mountain range. Predominantly, these processes imply growth in height of old-established individuals and less frequently upslope migration of new individuals. After a slight retardation during some c…
Subalpine Picea abies Decline in the Swedish Scandes
Changes in vigour and demography of subalpine Picea abies (L.) Karst were assessed on a regional basis in the Swedish Scandes. The study was based on repeat photography from fixed points in 1972/73 and in 1985/86. Crown thinning was already in an advanced stage in 1972/73. Approximately 75 percent of the studied population had a crown thinning of more than 20 percent. This process progressed during the study period, when about 30 percent of the s…
Rapid Natural Decline of Upper Montane Forests in the Swedish Scandes
Unprecedented needle loss of mature forest stands occurred in natural Swedish montane forests during 1987. Pine (Pinus sylvestris L.) and spruce (Picea abies [L.] Karst.) needles turned reddish-brown during the spring and early summer. An intensive study within a severely damaged pine population indicated that damage was primarily due to a coincidence of shallow snow cover and severe cold from mid-December 1986 to mid-January 1987. This resulted …
Orbital Forcing and Tree-Limit History
The Holocene tree-limit history for an area in Swedish Lappland is analysed from a new set of 67 14 C-dated subfossil wood remains. The species involved are Scots pine ( Pinus sylvestris), mountain birch ( Betula pubescens ssp. tortuosa) and grey alder ( Alnus incana). The highest tree-limit was established about 8000 BP by pine. Up to the present it has retreated c. 200 m in altitude at a constant rate of c. 25 m per millennium. A subalpine belt…
Th Century Climate Warming and Tree-limit Rise in the Southern Scandes of Sweden
Climate warming by ca. 0.8 degree C between the late-19th and late-20th century, although with some fluctuations, has forced multispecies elevational tree-limit advance by > 100 m for the principal tree species in the Swedish part of the Scandinavian mountain range. Predominantly, these processes imply growth in height of old-established individuals and less frequently upslope migration of new individuals. After a slight retardation during some c…
Th Century Climate Warming and Tree-limit Rise in the Southern Scandes of Sweden
Climate warming by ca. 0.8°C between the late-19th and late-20th century, although with some fluctuations, has forced multispecies elevational tree-limit advance by >100 m for the principal tree species in the Swedish part of the Scandinavian mountain range. Predominantly, these processes imply growth in height of old established individuals and less frequently upslope migration of new individuals. After a slight retardation during some cooler de…
Wind-Conditioned 20th Century Decline of Birch Treeline Vegetation in the Swedish Scandes
The study focused on a frequent, although not dominant, mode of treeline change in the Swedish Scandes over the past century. Monitoring of stand density decline in a wind-exposed subalpine birch (Betula pubescens ssp. tortuosa) population was carried out over the past 30 years. The overall result included substantial and unbalanced individual mortality and a drastic reduction in stature of surviving birches. Radiocarbon dating of in situ subfoss…
A Richer, Greener and Smaller Alpine World
Ancient Subalpine Clonal Spruces ( Picea abies )
This study addresses the long-standing issue of postglacial immigration of Picea abies (Norway spruce) into Scandinavia. The main methodological focus is on using megafossil tree remains (wood and cones) of spruce and other species retrieved from the treeline ecotone of the Swedish Scandes as a tool for vegetation reconstruction. The core data come from radiocarbon dating of megafossils preserved in the soil underneath clonal groups of Picea abie…
New Aspects of High-Mountain Palaeobiogeography
Recent recession of high-mountain glacier ice and perennial snow and ice patches has exposed megafossil and macrofossil tree remnants and peat, offering a new source of Holocene high alpine vegetation history in the Scandes. Radiocarbon dates of 90 tree megafossils from Swedish Lapland, 29 of which had not previously been published, range from 11 980 to 1950 cal yr BP. During the interval 9500 – 8500 cal yr BP, mountain birch (Betula pubescens ss…
Biology (9 obras) · Geography (9 obras) · Ecology (8 obras) · Tree-ring climate responses (8 obras) · Ecology (7 obras) · Physical geography (7 obras) · Archaeology (6 obras) · Environmental Science (6 obras) · Climate change (5 obras) · Holocene (5 obras)