Modelling evapotranspiration at three boreal forest stands using the CLASS: tests of parameterizations for canopy conductance and soil evaporation

2003 ◽  
Vol 23 (4) ◽  
pp. 427-451 ◽  
Author(s):  
Paul A. Bartlett ◽  
J. Harry McCaughey ◽  
Peter M. Lafleur ◽  
Diana L. Verseghy
Keyword(s):  
Boreal Forest ◽  
Soil Evaporation ◽  
Canopy Conductance ◽  
Forest Stands

Remote sensing of biophysical variables in boreal forest stands of Picea mariana

1996 ◽  
Vol 17 (15) ◽  
pp. 3077-3081 ◽  
Author(s):  
F. G. HALL ◽  
D. R. PEDDLE ◽  
E. F. LEDREW
Keyword(s):  
Remote Sensing ◽  
Boreal Forest ◽  
Picea Mariana ◽  
Forest Stands

Variability in carbon exchange and light utilization among boreal forest stands: implications for remote sensing of net primary production

1998 ◽  
Vol 28 (3) ◽  
pp. 375-389 ◽  
Author(s):  
Scott J Goetz ◽  
Stephen D Prince
Keyword(s):  
Remote Sensing ◽  
Primary Production ◽  
Boreal Forest ◽  
Populus Tremuloides ◽  
Net Primary Production ◽  
Gross Primary Production ◽  
Total Carbon ◽  
Simple Relationship ◽  
Carbon Exchange ◽  
Forest Stands

Variability in carbon exchange, net primary production (NPP), and light-use efficiency were explored for 63 boreal forest stands in northeastern Minnesota using an ecophysiological model. The model was initialized with extensive field measurements of Populus tremuloides Michx. and Picea mariana (Mill.) BSP stand properties. The results showed that the proportion of total carbon assimilation expended in autotrophic respiration (i.e., the respiration to assimilation ratio, R/A) was significantly different for the two tree species and this explained much of the variability in the amount of net production per unit absorbed photosynthetically active radiation (APAR), referred to as PAR utilization ( epsilonn). This is the first known study to directly link variability in respiratory costs to epsilonn. Total assimilation per unit APAR ( epsilong) was much less variable than epsilonn and was not significantly different between species. Greater stomatal control on some moisture stressed sites accounted for most of the variability in epsilong. The lack of a simple relationship between light harvesting and net carbon gain indicates that estimation of net primary production with satellite remote sensing requires additional information on respiration costs; however, evidence for convergence in epsilong can be used to simplify the remote sensing of gross primary production over large areas.

Nesting of solitary wasps and bees in natural and artificial holes in dead wood in young boreal forest stands

2015 ◽  
Vol 8 (6) ◽  
pp. 493-504 ◽  
Author(s):  
Per Westerfelt ◽  
Olof Widenfalk ◽  
Åke Lindelöw ◽  
Lena Gustafsson ◽  
Jan Weslien
Keyword(s):  
Boreal Forest ◽  
Dead Wood ◽  
Forest Stands
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