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biologywhite spruce
forestry
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arctic treeline
tree growth
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seedling survival
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trees
4 Dossier(s) trouvé(s) pour le chercheur principal "Greene, David" (les projets pluriannuels sont regroupés):
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Black Spruce Fertility at the Arctic Treeline
chercheur principal: Greene, David F
Année(s) de permis: 2009
Résumé: The research objective is to show that the fertility of black spruce (Picea mariana) in the Arctic is limited by the amount of pollen in the surrounding air. After snowmelt, the researchers will choose unburned black spruce “islands” at different distances from the perimeter of the 1999 Lynx Creek fire. Subsequently, as the developing black spruce pollen cones become easy to see, they will remo...
Année(s) de permis: 2009
Résumé: The research objective is to show that the fertility of black spruce (Picea mariana) in the Arctic is limited by the amount of pollen in the surrounding air. After snowmelt, the researchers will choose unburned black spruce “islands” at different distances from the perimeter of the 1999 Lynx Creek fire. Subsequently, as the developing black spruce pollen cones become easy to see, they will remo...
Tree regeneration on seismic lines
chercheur principal: Greene, David F
Année(s) de permis: 2005 2004
Résumé: The purpose of this project is to identify the factors that promote or retard forest regrowth after seismic line cutting. Little was known about tree regeneration on seismic lines until the 2001-2003 study by Seccombe-Hett and Walker-Larsen, which showed that older lines were well-stocked but that the delay in coloniziation might be caused by dramatic subsidence and resulting water-logging. ...
Année(s) de permis: 2005 2004
Résumé: The purpose of this project is to identify the factors that promote or retard forest regrowth after seismic line cutting. Little was known about tree regeneration on seismic lines until the 2001-2003 study by Seccombe-Hett and Walker-Larsen, which showed that older lines were well-stocked but that the delay in coloniziation might be caused by dramatic subsidence and resulting water-logging. ...
Dispersal of white spruce seeds and pollen/understory scarification in a mast year
chercheur principal: Greene, David F
Année(s) de permis: 2002
Résumé: The long distance dispersal of tree pollen and seeds is of considerable interest as we ask how fast plants can migrate in response to rapid climate change. Examination of seed dispersal will actually be based on looking at germinants (rather than seeds)...
Année(s) de permis: 2002
Résumé: The long distance dispersal of tree pollen and seeds is of considerable interest as we ask how fast plants can migrate in response to rapid climate change. Examination of seed dispersal will actually be based on looking at germinants (rather than seeds)...
Licence #2757
chercheur principal: Greene, David F
Année(s) de permis: 1982
Résumé: To undertake a study of white spruce, genus (Picea glauca). i) digging of seedlings ii) coring of mature trees iii) digging 3 soil pits iv) collecting plant samples v) collecting seed samples vi) felling approx. 15 trees (all sizes - one location) This is the field work in conjunction with an MSc. thesis....
Année(s) de permis: 1982
Résumé: To undertake a study of white spruce, genus (Picea glauca). i) digging of seedlings ii) coring of mature trees iii) digging 3 soil pits iv) collecting plant samples v) collecting seed samples vi) felling approx. 15 trees (all sizes - one location) This is the field work in conjunction with an MSc. thesis....
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