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Full-Text Articles in Life Sciences
A New Forest Floor Corer For Rapid Sampling, Minimal Disturbance And Adequate Precision, Ian A. Nalder, Ross W. Wein
A New Forest Floor Corer For Rapid Sampling, Minimal Disturbance And Adequate Precision, Ian A. Nalder, Ross W. Wein
Aspen Bibliography
We describe an effective and inexpensive device for sampling forest floors. It is based on a rechargeable, battery-powered drill that drives a sharpened steel coring tube. The corer is simple to fabricate, is lightweight (3.5 kg) and can be used easily by one person to obtain intact, natural volume cores of the forest floor. It has been used extensively to obtain samples in 114 boreal forest stands of western Canada. We found that coefficients of variation were typically 30% for forest floor organic matter and bulk density, and tended to be higher in Pinus banksiana stands than in Picea glauca …
Formation Of Lichen Flora On Pioneer Substrates (Erratic Blocks, The Aspen Bark And Straw Thatches), Ludwik Lipnicki
Formation Of Lichen Flora On Pioneer Substrates (Erratic Blocks, The Aspen Bark And Straw Thatches), Ludwik Lipnicki
Aspen Bibliography
The thesis is based on the research results of the lichen flora formation on the substrates: the surface of erratic blocks, aspen barks and straw thatches. Subjection of the species composition to the changes of conditions of the closest environment (mainly the substrate) was analysed. The relationships between the kind of substrate and its permanence, and some features (e.g. morphological features) of pioneering lichens were examined; the intensification of those features and degrees of species pioneering were also distinguished.