Evergreen Coniferous Forests of the Pacific Northwest

@article{Waring1979EvergreenCF,
  title={Evergreen Coniferous Forests of the Pacific Northwest},
  author={Richard H. Waring and Jerry F. Franklin},
  journal={Science},
  year={1979},
  volume={204},
  pages={1380 - 1386}
}
The massive, evergreen coniferous forests in the Pacific Northwest are unique among temperate forest regions of the world. The region's forests escaped decimation during Pleistocene glaciation; they are now dominated by a few broadly distributed and well-adapted conifers that grow to large size and great age. Large trees with evergreen needle- or scale-like leaves have distinct advantages under the current climatic regime. Photosynthesis and nutrient uptake and storage are possible during the… 

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References

SHOWING 1-10 OF 50 REFERENCES

The Pygmy Forest Region of Northern California: Studies on Biomass and Primary Productivity

A most striking effect of soil on vegetation occurs on the coastal terraces of Mendocino County, northern California (longitude 123? 50' W, latitude 39? 20' N). Giant forests of the coastal redwood

Fire and Nutrient Cycling in a Douglas-Fir/Larch Forest

Twenty control burns performed with a wide range of fuel loadings and moisture conditions were used to study the effectiveness of old fuel reduction under standing Douglas—fir/larch forest, showing this soil is young and capable of withstanding many years of cyclic intensive burns.

Relationships of Environment to Composition, Structure, and Diversity of Forest Communities of the Central Western Cascades of Oregon

Temperature and moisture stress of conifer saplings and needle nitrogen content of conifer saplings were measured at reference stands representing 16 forest communities in the central portion of the

Old‐Growth Pseudotsuga menziesii Communities of a Western Oregon Watershed: Biomass Distribution and Production Budgets

Living biomass, organic matter distribution, and organic matter production budgets were determined for plant communities of a small watershed dominated by 450—yr—old Pseudotsuga menziesii (Mirb.)

STUDIES IN TREE PHYSIOLOGY: IV. FURTHER INVESTIGATIONS OF SEASONAL CHANGES IN MOISTURE CONTENT OF CERTAIN CANADIAN FOREST TREES

Minor variations in the water content pattern of yellow birch due to precipitation, evapotranspiration, and winter insolation lend little support to the view that birch dieback is due to an increase in temperature or to drought, except possibly through their effects on some unknown biotic factor.

Primary Productivity of Red Alder Ecosystems

Fifty red alder communities from 1 to 65 years old were studied in western Oregon. Highly significant correlations were found between an index of volume and dry weights of whole trees, individual

Analysis of Temperate Forest Ecosystems

  • D. Reichle
  • Environmental Science
    Ecological Studies
  • 1973
Analysis of an Ecosystem.- 1. Combination of Qualitative and Quantitative Approaches.- 2. Analysis of Ecosystems.- 3. Studying the Effects of Environmental Factors on Ecosystems.- 4. Phenology in

Sapwood water storage: its contribution to transpiration and effect upon water conductance through the stems of old‐growth Douglas‐fir

Abstract Enough water is stored in the sapwood of large Douglas-fir to significantly contribute to transpiration. Sapwood water content falls through the season, causing the wood's conductivity to

Factors affecting the canopy resistance of a Douglas-fir forest

The physiological nature of canopy resistance was studied by comparing the stomatal and canopy resistance of a 10-m high Douglas-fir forest. Stomatal resistance of the needles was measured using