The Experts below are selected from a list of 255 Experts worldwide ranked by ideXlab platform
Les C Cwynar - One of the best experts on this subject based on the ideXlab platform.
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the lateglacial and postglacial vegetation history of the northwestern limits of beringia based on pollen stomate and Tree Stump evidence
Quaternary Science Reviews, 2001Co-Authors: Michael F J Pisaric, Glen M. Macdonald, A A Velichko, Les C CwynarAbstract:Abstract In order to reconstruct the Late- and Postglacial vegetation history of the northwestern edge of Beringia, a sediment core was collected from a lake north of the present Treeline along the lower Lena River of northeastern Siberia, and analysed for fossil pollen and stomates. In addition, fossil Tree Stumps were collected in the vicinity of the lake. Eight radiocarbon dates indicate that the lake sediment record spans at least the past 12,300 yr BP. The early vegetation at this site was dominated by herb and shrub tundra. Possible evidence of Younger Dryas cooling, consisting of a decrease in shrub birch and increases in grass and herbaceous plants, occurs between 11,000 and 10,000 yr BP. Forests, dominated by Larix dahurica and including Picea obovata , extended northward to the site between 8500 and 3500 yr BP. There is an agreement between the pollen, stomate and Tree Stump evidence for this advance. The modern vegetation of shrub tundra was established after 3500 yr BP.
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The Lateglacial and Postglacial vegetation history of the northwestern limits of Beringia, based on pollen, stomate and Tree Stump evidence
Quaternary Science Reviews, 2000Co-Authors: Michael F J Pisaric, Glen M. Macdonald, A A Velichko, Les C CwynarAbstract:Abstract In order to reconstruct the Late- and Postglacial vegetation history of the northwestern edge of Beringia, a sediment core was collected from a lake north of the present Treeline along the lower Lena River of northeastern Siberia, and analysed for fossil pollen and stomates. In addition, fossil Tree Stumps were collected in the vicinity of the lake. Eight radiocarbon dates indicate that the lake sediment record spans at least the past 12,300 yr BP. The early vegetation at this site was dominated by herb and shrub tundra. Possible evidence of Younger Dryas cooling, consisting of a decrease in shrub birch and increases in grass and herbaceous plants, occurs between 11,000 and 10,000 yr BP. Forests, dominated by Larix dahurica and including Picea obovata , extended northward to the site between 8500 and 3500 yr BP. There is an agreement between the pollen, stomate and Tree Stump evidence for this advance. The modern vegetation of shrub tundra was established after 3500 yr BP.
Michael F J Pisaric - One of the best experts on this subject based on the ideXlab platform.
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the lateglacial and postglacial vegetation history of the northwestern limits of beringia based on pollen stomate and Tree Stump evidence
Quaternary Science Reviews, 2001Co-Authors: Michael F J Pisaric, Glen M. Macdonald, A A Velichko, Les C CwynarAbstract:Abstract In order to reconstruct the Late- and Postglacial vegetation history of the northwestern edge of Beringia, a sediment core was collected from a lake north of the present Treeline along the lower Lena River of northeastern Siberia, and analysed for fossil pollen and stomates. In addition, fossil Tree Stumps were collected in the vicinity of the lake. Eight radiocarbon dates indicate that the lake sediment record spans at least the past 12,300 yr BP. The early vegetation at this site was dominated by herb and shrub tundra. Possible evidence of Younger Dryas cooling, consisting of a decrease in shrub birch and increases in grass and herbaceous plants, occurs between 11,000 and 10,000 yr BP. Forests, dominated by Larix dahurica and including Picea obovata , extended northward to the site between 8500 and 3500 yr BP. There is an agreement between the pollen, stomate and Tree Stump evidence for this advance. The modern vegetation of shrub tundra was established after 3500 yr BP.
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The Lateglacial and Postglacial vegetation history of the northwestern limits of Beringia, based on pollen, stomate and Tree Stump evidence
Quaternary Science Reviews, 2000Co-Authors: Michael F J Pisaric, Glen M. Macdonald, A A Velichko, Les C CwynarAbstract:Abstract In order to reconstruct the Late- and Postglacial vegetation history of the northwestern edge of Beringia, a sediment core was collected from a lake north of the present Treeline along the lower Lena River of northeastern Siberia, and analysed for fossil pollen and stomates. In addition, fossil Tree Stumps were collected in the vicinity of the lake. Eight radiocarbon dates indicate that the lake sediment record spans at least the past 12,300 yr BP. The early vegetation at this site was dominated by herb and shrub tundra. Possible evidence of Younger Dryas cooling, consisting of a decrease in shrub birch and increases in grass and herbaceous plants, occurs between 11,000 and 10,000 yr BP. Forests, dominated by Larix dahurica and including Picea obovata , extended northward to the site between 8500 and 3500 yr BP. There is an agreement between the pollen, stomate and Tree Stump evidence for this advance. The modern vegetation of shrub tundra was established after 3500 yr BP.
Jiang Aiwu - One of the best experts on this subject based on the ideXlab platform.
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Spring foraging habitat character of black bear(Ursus thibetanus) in Guangxi Yuanbaoshan Nature Reserve
Journal of Nanjing Forestry University, 2011Co-Authors: Jiang AiwuAbstract:From Jan 2009 to March 2009,black bear's foraging habitat character in Yuanbaoshan Nature Reserve of Guangxi was studied.In fieldwork,we collected 82 samples(20 m×20 m),sixteen ecological factors.Principal components analyses results showed that main factors of black bear foraging habitat characteristics were water distance,elevation,and shrub density;secondary factors were food abundance factor(Tree diameter,Tree density,Tree distance,shrub distance),geographical factors(aspect,slope position,ratio of slope),interference factors(Tree Stump density,Tree Stump distance,log distance,human disturbance distance),and micro-habitat factors(shelter of wind,canopy density).Single factor analyses indicated black bear priorities were water richness,certain altitude、moderate shelter of wind、vegetation richness(Tree density,shrub density,shrub distance、Tree distance),aspect towards sun、canopy density(30 %-80 %),ridge steep slope and optimal slope position habitat.As human activity increase,interference factors(Tree Stump density,Tree Stump distance,log distance,distance to human disturbance) were important factors which influence black bear habitat selection.Our conclusion provide important information for Nature Reserve and forest management department.
Glen M. Macdonald - One of the best experts on this subject based on the ideXlab platform.
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the lateglacial and postglacial vegetation history of the northwestern limits of beringia based on pollen stomate and Tree Stump evidence
Quaternary Science Reviews, 2001Co-Authors: Michael F J Pisaric, Glen M. Macdonald, A A Velichko, Les C CwynarAbstract:Abstract In order to reconstruct the Late- and Postglacial vegetation history of the northwestern edge of Beringia, a sediment core was collected from a lake north of the present Treeline along the lower Lena River of northeastern Siberia, and analysed for fossil pollen and stomates. In addition, fossil Tree Stumps were collected in the vicinity of the lake. Eight radiocarbon dates indicate that the lake sediment record spans at least the past 12,300 yr BP. The early vegetation at this site was dominated by herb and shrub tundra. Possible evidence of Younger Dryas cooling, consisting of a decrease in shrub birch and increases in grass and herbaceous plants, occurs between 11,000 and 10,000 yr BP. Forests, dominated by Larix dahurica and including Picea obovata , extended northward to the site between 8500 and 3500 yr BP. There is an agreement between the pollen, stomate and Tree Stump evidence for this advance. The modern vegetation of shrub tundra was established after 3500 yr BP.
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The Lateglacial and Postglacial vegetation history of the northwestern limits of Beringia, based on pollen, stomate and Tree Stump evidence
Quaternary Science Reviews, 2000Co-Authors: Michael F J Pisaric, Glen M. Macdonald, A A Velichko, Les C CwynarAbstract:Abstract In order to reconstruct the Late- and Postglacial vegetation history of the northwestern edge of Beringia, a sediment core was collected from a lake north of the present Treeline along the lower Lena River of northeastern Siberia, and analysed for fossil pollen and stomates. In addition, fossil Tree Stumps were collected in the vicinity of the lake. Eight radiocarbon dates indicate that the lake sediment record spans at least the past 12,300 yr BP. The early vegetation at this site was dominated by herb and shrub tundra. Possible evidence of Younger Dryas cooling, consisting of a decrease in shrub birch and increases in grass and herbaceous plants, occurs between 11,000 and 10,000 yr BP. Forests, dominated by Larix dahurica and including Picea obovata , extended northward to the site between 8500 and 3500 yr BP. There is an agreement between the pollen, stomate and Tree Stump evidence for this advance. The modern vegetation of shrub tundra was established after 3500 yr BP.
A A Velichko - One of the best experts on this subject based on the ideXlab platform.
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the lateglacial and postglacial vegetation history of the northwestern limits of beringia based on pollen stomate and Tree Stump evidence
Quaternary Science Reviews, 2001Co-Authors: Michael F J Pisaric, Glen M. Macdonald, A A Velichko, Les C CwynarAbstract:Abstract In order to reconstruct the Late- and Postglacial vegetation history of the northwestern edge of Beringia, a sediment core was collected from a lake north of the present Treeline along the lower Lena River of northeastern Siberia, and analysed for fossil pollen and stomates. In addition, fossil Tree Stumps were collected in the vicinity of the lake. Eight radiocarbon dates indicate that the lake sediment record spans at least the past 12,300 yr BP. The early vegetation at this site was dominated by herb and shrub tundra. Possible evidence of Younger Dryas cooling, consisting of a decrease in shrub birch and increases in grass and herbaceous plants, occurs between 11,000 and 10,000 yr BP. Forests, dominated by Larix dahurica and including Picea obovata , extended northward to the site between 8500 and 3500 yr BP. There is an agreement between the pollen, stomate and Tree Stump evidence for this advance. The modern vegetation of shrub tundra was established after 3500 yr BP.
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The Lateglacial and Postglacial vegetation history of the northwestern limits of Beringia, based on pollen, stomate and Tree Stump evidence
Quaternary Science Reviews, 2000Co-Authors: Michael F J Pisaric, Glen M. Macdonald, A A Velichko, Les C CwynarAbstract:Abstract In order to reconstruct the Late- and Postglacial vegetation history of the northwestern edge of Beringia, a sediment core was collected from a lake north of the present Treeline along the lower Lena River of northeastern Siberia, and analysed for fossil pollen and stomates. In addition, fossil Tree Stumps were collected in the vicinity of the lake. Eight radiocarbon dates indicate that the lake sediment record spans at least the past 12,300 yr BP. The early vegetation at this site was dominated by herb and shrub tundra. Possible evidence of Younger Dryas cooling, consisting of a decrease in shrub birch and increases in grass and herbaceous plants, occurs between 11,000 and 10,000 yr BP. Forests, dominated by Larix dahurica and including Picea obovata , extended northward to the site between 8500 and 3500 yr BP. There is an agreement between the pollen, stomate and Tree Stump evidence for this advance. The modern vegetation of shrub tundra was established after 3500 yr BP.
