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biologyforestry
forest growth
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boreal forests
forest litter
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9 Dossier(s) trouvé(s) pour le chercheur principal "Osawa, Akira" (les projets pluriannuels sont regroupés):
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Climate change and structure of circumpolar boreal forests during the past century
chercheur principal: Osawa, Akira
Année(s) de permis: 2014
Résumé: Objectives of the research are two-fold. First is to estimate structure and growth of forest stands in northwestern Canada by applying a stand reconstruction technique. Second is to examine the relationship between climate change in the Arctic region and the patterns of forest biomass growth during the past century. The research team also measure currently occurring growth and carbon dynamics of f...
Année(s) de permis: 2014
Résumé: Objectives of the research are two-fold. First is to estimate structure and growth of forest stands in northwestern Canada by applying a stand reconstruction technique. Second is to examine the relationship between climate change in the Arctic region and the patterns of forest biomass growth during the past century. The research team also measure currently occurring growth and carbon dynamics of f...
Structure, Carbon Dynamics, and Silvichronology of Boreal Forests
chercheur principal: Osawa, Akira
Année(s) de permis: 2019 2018 2016 2015 2013 2012 2011 2010 2009 2008 2007 2006
Résumé: Main objective of the field work is to collect data in jack pine and black spruce forests on annual movement of organic matter and carbon. Additional objective is to conduct a regional study of stand development and its relationship to environmental factors in a several-square-kilometer study area of mostly black spruce. Five methods will be used. 1) Soil and air temperature will be measured...
Année(s) de permis: 2019 2018 2016 2015 2013 2012 2011 2010 2009 2008 2007 2006
Résumé: Main objective of the field work is to collect data in jack pine and black spruce forests on annual movement of organic matter and carbon. Additional objective is to conduct a regional study of stand development and its relationship to environmental factors in a several-square-kilometer study area of mostly black spruce. Five methods will be used. 1) Soil and air temperature will be measured...
Structure of black spruce forests on continuous permafrost
chercheur principal: Osawa, Akira
Année(s) de permis: 2005
Résumé: The researchers will measure black spruce forests along the Dempster Highway. They will determine if the trees can only grow to a certain limit that cannot be surpassed, regardless of the number of trees per hectare. A limit of this kind was recently discovered in Siberia. The number of trees per hectare and above-ground biomass will be estimated in numerous black spruce stands. A method ...
Année(s) de permis: 2005
Résumé: The researchers will measure black spruce forests along the Dempster Highway. They will determine if the trees can only grow to a certain limit that cannot be surpassed, regardless of the number of trees per hectare. A limit of this kind was recently discovered in Siberia. The number of trees per hectare and above-ground biomass will be estimated in numerous black spruce stands. A method ...
Carbon dynamics in chronosequence of boreal forest ecosystems: a production ecological approach
chercheur principal: Osawa, Akira
Année(s) de permis: 2017 2005 2004 2003 2002 2001
Résumé: Northern forests are closely connected to the issue of global warming because they are likely to absorb much of the carbon dioxide that is emitted into the air by humans. The amount that these forests absorb, however, is not clear. The main objectives of the 2005 field season are to collect data on the annual growth of fine roots, and to further examine the rate of soil respiration. Both of these...
Année(s) de permis: 2017 2005 2004 2003 2002 2001
Résumé: Northern forests are closely connected to the issue of global warming because they are likely to absorb much of the carbon dioxide that is emitted into the air by humans. The amount that these forests absorb, however, is not clear. The main objectives of the 2005 field season are to collect data on the annual growth of fine roots, and to further examine the rate of soil respiration. Both of these...
Analysis of Natural Thinning Processes in Mixed Species Forests.
chercheur principal: Osawa, Akira
Année(s) de permis: 2000
Résumé: The main objective of the proposed research is to collect extensive data of tree size and stand density from mixed forests of Jack pine and quaking aspen in Wood Buffalo National Park and to examine theoretically the patterns of quantitative forest development with special reference to the phenomenon of 'natural thinning' in even-aged forests. The research team consisting of forest ecologists will...
Année(s) de permis: 2000
Résumé: The main objective of the proposed research is to collect extensive data of tree size and stand density from mixed forests of Jack pine and quaking aspen in Wood Buffalo National Park and to examine theoretically the patterns of quantitative forest development with special reference to the phenomenon of 'natural thinning' in even-aged forests. The research team consisting of forest ecologists will...
An Exploratory Evaluation of the Effect of the Climate Change During the Past Two Centuries on Structure of Jack Pine Forests.
chercheur principal: Osawa, Akira
Année(s) de permis: 1999
Résumé: The main objective of the proposed research is to reconstruct the structure of monospecific forests of different ages, and to explore whether or not the recent climate change has affected the structure of the forests in northern Canada. Pure stands of Jack pine or aspen will be studied in Wood Buffalo National Park. The intent is to determine the effect of the so-called Climate Change on those f...
Année(s) de permis: 1999
Résumé: The main objective of the proposed research is to reconstruct the structure of monospecific forests of different ages, and to explore whether or not the recent climate change has affected the structure of the forests in northern Canada. Pure stands of Jack pine or aspen will be studied in Wood Buffalo National Park. The intent is to determine the effect of the so-called Climate Change on those f...
Reconstruction of Forest Structure and function in Canadian Taiga
chercheur principal: Osawa, Akira
Année(s) de permis: 1998 1997
Résumé: The research team will consist of forest ecologists. We plan to study a few jack pine stands by taking stem samples for examination of forest growth that occurred in the past. A possible effect of climate change on the growth of forests are being examined. Several trees were cut and were analyzed last year. This summer several additional stems will be sampled. When a tree is cut, we try not to dis...
Année(s) de permis: 1998 1997
Résumé: The research team will consist of forest ecologists. We plan to study a few jack pine stands by taking stem samples for examination of forest growth that occurred in the past. A possible effect of climate change on the growth of forests are being examined. Several trees were cut and were analyzed last year. This summer several additional stems will be sampled. When a tree is cut, we try not to dis...
Jack Pine Forest Research
chercheur principal: Osawa, Akira
Année(s) de permis: 1994
Résumé: The researcher will conduct research on jack pine forests along the highways in Wood Buffalo National Park and will also collect stem increment cores from black spruce trees around the latitudinal tree line near Inuvik. This research will consist of remeasurement of permanent plots, foliage distribution and light measurement, establishment of pruning experiment and stem core sampling near Inuvik....
Année(s) de permis: 1994
Résumé: The researcher will conduct research on jack pine forests along the highways in Wood Buffalo National Park and will also collect stem increment cores from black spruce trees around the latitudinal tree line near Inuvik. This research will consist of remeasurement of permanent plots, foliage distribution and light measurement, establishment of pruning experiment and stem core sampling near Inuvik....
Testing the Allometric Theory of the Self-Thinning Rule
chercheur principal: Osawa, Akira
Année(s) de permis: 1992 1991 1987
Résumé: The researcher and his team will estimate the number of trees and monitor individual growth in flagged and tagged stands, as well as estimating foliage weight of individual trees. They will measure light conditions in various jack pine stands, as well as collect stem cores to be analyzed and compared with stem cores from other parts of the northern hemisphere for the possibility of accelerated gr...
Année(s) de permis: 1992 1991 1987
Résumé: The researcher and his team will estimate the number of trees and monitor individual growth in flagged and tagged stands, as well as estimating foliage weight of individual trees. They will measure light conditions in various jack pine stands, as well as collect stem cores to be analyzed and compared with stem cores from other parts of the northern hemisphere for the possibility of accelerated gr...
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