Importance of Canada s Boreal Forest to Landbirds

  • Auteur: Peter J. Blancher
  • ISBN:
  • Date de sortie: 2003
  • Collection: Canadian Boreal Initiative
  • Total Download: 6882
  • Total Read: 8966

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Effects of Warming on the Structure and Function of a Boreal Black Spruce Forest Ecosystem

  • Auteur: Dustin R. Bronson
  • ISBN: 0549633634
  • Date de sortie: 2008
  • Collection: ProQuest
  • Total Download: 3075
  • Total Read: 3313

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The boreal forest has a vast stock of static carbon, most of which is locked in cold, nutrient poor soils. However this critical forest biome is expected to increase in surface temperature more than any other forest biome. To assess how warming would affect this economic and ecological important biome, we designed an experiment to increase soil and air temperature 5°C above ambient temperature. Using large greenhouses and soil heating cables, soil and air warming (HI) as well as soil-only warming (HO) was achieved. A control chamber (CI) assessed the effect of the chamber alone without warming compared to the control (CO). Soil surface CO2 flux (Rs) was 24% greater for HO than CO in 2004, but was only 11% greater in 2005. The HI treatment RS was 31% less than the control in 2004 and 23% less in 2005. Warming affected the black spruce phenology by producing earlier bud burst, 11 and 9 days earlier in 2004 and 2005, respectively, for HI than other treatments. In the second and third year of warming, annual shoot growth was significantly greater for HI (P ≤ 0.0013) than all other treatments. However the greater primary shoot length in 2005 was not significant when all new shoot mass across the branch was measured. In 2006 new shoot mass across the entire branch was significantly greater (P = 0.0003) for HI than other treatments. Fine root NPP was significantly less (43--66%) for the heated than control treatments and the difference between heated and control treatments increased from 2005 to 2006. Aboveground NPP (NPPA) was 87% and 116% less for HO than the control for 2005 and 2006, respectively, and NPPA was 77% and 110% less for HI than the control for 2005 and 2006, respectively. Total NPP (NPP total) for HI and HO was both only 74% and 81% of the control NPPtotal for 2005 and 2006, respectively. The results from this study suggest that warming may decrease the potential of boreal black spruce forest to sequester carbon.

Towards Sustainable Management of the Boreal Forest

  • Auteur: Philip Joseph Burton
  • ISBN: 9780660187624
  • Date de sortie: 2003
  • Collection: NRC Research Press
  • Total Download: 3628
  • Total Read: 1425

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Presenting a summary of the development in boreal forest management, this book provides a progressive vision for some of the world's northern forests. It includes a selection of chapters based on the research conducted by the Sustainable Forest Management Network across Canada. It includes a number of case histories.

Boreal Futures Governance Conservation and Development in

  • Auteur:
  • ISBN:
  • Date de sortie:
  • Collection:
  • Total Download: 4019
  • Total Read: 6241

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Ecosystem Management in the Boreal Forest

  • Auteur: Sylvie Gauthier
  • ISBN: 9782760523821
  • Date de sortie: 2009-01-01
  • Collection: PUQ
  • Total Download: 5867
  • Total Read: 4128

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Boreal Forest and Climate Change

  • Auteur: Pertti Hari
  • ISBN: 1402087187
  • Date de sortie: 2008-09-24
  • Collection: Springer Science & Business Media
  • Total Download: 3731
  • Total Read: 4636

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The Forest Primary Production Research Group was born in the Department of S- viculture, University of Helsinki in the early 1970s. Intensive ?eld measurements of photosynthesis and growth of forest vegetation and use of dynamic models in the interpretation of the results were characteristic of the research in the group. Electric instrumentation was based on analogue techniques and the analysis of the obtained measurements was based on self-written programs. Joint research projects with the Research Group of Environmental Physics at the Department of Physics, lead by Taisto Raunemaa (1939–2006) started in the late 1970s. The two research groups shared the same quantitative methodology, which made the co-operation fruitful. Since 1980 until the collapse of the Soviet Union the Academy of Finland and the Soviet Academy of Sciences had a co-operation program which included our team. The research groups in Tartu, Estonia, lead by Juhan Ross (1925–2002) and in Petrozawodsk, lead by Leo Kaipiainen (1932–2004) were involved on the Soviet side. We had annual ?eld measuring campaigns in Finland and in Soviet Union and research seminars. The main emphasis was on developing forest growth models. The research of Chernobyl fallout started a new era in the co-operation between forest ecologists and physicists in Helsinki. The importance of material ?uxes was realized and introduced explicitly in the theoretical thinking and measurements.

A Walk in the Boreal Forest

  • Auteur: Rebecca L. Johnson
  • ISBN: 9781575051567
  • Date de sortie: 2001
  • Collection: Lerner Publications
  • Total Download: 1608
  • Total Read: 9435

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Describes the climate, seasons, plants, animals, and soil of the boreal forest, a biome or land zone, which stretches across the northern parts of North America, Europe, and Asia.
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